7 Automotive Electrical Appliances / 7.2 Vehicle Control Unit (VCU) Device | PDF pages 1142-1261

7.2 Vehicle Control Unit (VCU) Device

7.2.1 Specifications

7.2.1.1 Fastener Specifications

Range Of Torque

Fastener Specifications

Specifications

Foot Pounds of Torque (ft lbs)

The fixing bolt connecting the power

domain controller bracket to the battery

(6.5 +/- .75) ft lbs

pressure plate 2

The fixing bolt connecting the power

domain controller bracket to the battery

(6.5 +/- .75) ft lbs

pressure plate 3

The fixing bolts connecting the bracket

of the power domain controller to the

(11 +/- 1.5) ft lbs

power domain controller assembly

7.2.2 Decomposition Diagram

7.2.2.1 Decomposition Diagram

Vehicle Domain Controller

Vehicle Controller Assy Bracket

Hexagon Flange Bolt

7.2.3 System Schematic Diagram

7.2.3.1 Electrical Schematic Diagram

Vehicle domain controller(VDC)

EVCC

7.2.4 Diagnostic Information and Steps

7.2.4.1 Diagnosis Description

Before diagnosing the fault of the vehicle controller device, understand and be familiar with the working principle of the vehicle

controller device, and then start system diagnosis. This will help determine the correct fault diagnosis steps when a fault occurs.

More importantly, this Helps determine the situation described by the customer is normal operation. Any fault diagnosis of the

vehicle controller device should start with Routine Inspection to guide the maintenance personnel to take the next logical step for

fault diagnosis. Understanding and correctly using the diagnostic process can shorten diagnosis time and avoid misjudgment of

faulty parts.

7.2.4.2 Routine Inspection

• Check after-sales installation devices that may affect the operation of the vehicle controller device system, and ensure that

these devices cannot affect the operation of the vehicle controller device system.

• Inspect system components that are easily accessible or visible to make sure they are not visibly damaged or have conditions

that could cause failure.

7.2.4.3 DTC Confirmation

1.Connect the diagnostic instrument to the diagnostic interface, read and record the DTC, and then clear the DTC.

2. Restart the vehicle.

3. Read the fault code of the control system again to confirm whether the system has a fault code output.

– Yes:Diagnose based on the output fault code.

– No:Perform intermittent fault checks, refer to Inspection Of Intermittent Fault

7.2.4.4 List Of Diagnostic Trouble Codes (DTC)

VDC

Fault Description

Troubleshooting

Fault Code

P10F752

Lost Communication With WPTC1/2

P10F852

Lost Communication With BLR1/2

U019887

Lost Communication With T-Box

U014087

Lost Communication With BDCU

Lost Communication With SJB_UP

U01A087

U019987

Lost Communication With DCM

Lost Communication With SJB_UN

U01A187

U015687

Lost Communication With CDCU

U017487

Lost Communication With CMU01

U017587

Lost Communication With CMU02

Refer to VDC Communication Fault

U017687

Lost Communication With CMU03

U017787

Lost Communication With CMU04

U017887

Lost Communication With CMU05

U017987

Lost Communication With CMU06

U017A87

Lost Communication With PDU1

U017B87

Lost Communication With PDU2

U017C87

Lost Communication With PDU3

U012A87

Lost Communication With MCU1

U012B87

Lost Communication With MCU2

U012C87

Lost Communication With MCU3

Fault Description

Troubleshooting

Fault Code

U012D87

Lost Communication With MCU4

U010187

Lost Communication With TCU1

U010287

Lost Communication With TCU2

U01B387

Lost Communication With GSM

U012187

Lost Communication With EBS

U013287

Lost Communication With ECAS

U012887

Lost Communication With EPB

PCAN2_Busoff

U008C88

PCAN3_Busoff

U008D88

PCAN4_Busoff

U008E88

ChargrCAN_Busoff

U008B88

CANFD7_Busoff

U007988

CANFD10_Busoff

U008088

HTP_P Sensor 1, short circuit

P101010

HTP_P Sensor 1, open circuit

P101110

HTP_P Sensor 2, short circuit

P101210

HTP_P Sensor 2, open circuit

P101310

LTP_P Sensor 1, short circuit

P101410

LTP_P Sensor 1, open circuit

P101510

LTP_P Sensor 2, short circuit

P101610

LTP_P Sensor 2, open circuit

P101710

Refer to VDC Internal Fault

HPT_T Sensor 1, open circuit

P101810

HPT_T Sensor 1, short circuit

P101910

HPT_T Sensor 2, open circuit

P101A10

HPT_T Sensor 2, short circuit

P101B10

LPT_T Sensor 1, open circuit

P101C10

LPT_T Sensor 1, short circuit

P101D10

LPT_T Sensor 2, open circuit

P101E10

LPT_T Sensor 2, short circuit

P101F10

AccPed 1, short circuit

P102C10

AccPed 2, short circuit

P102D10

AccPed 1, open circuit

P102E10

AccPed 2, open circuit

P102F10

Refer to Accelerator Pedal Fault

The calibration values of the two

P103010

accelerator pedals do not match

Both accelerator pedals malfunction

P103110

simultaneously

The motor liquid level sensor is short of

Refer to Motor Coolant Level Sensor

P103910

liquid

Fault

Fault Description

Troubleshooting

Fault Code

The battery liquid level sensor is short of

Refer to Battery Coolant Level Sensor

P103A10

liquid

Fault

Refrigerant shortage in the unitt

P103D10

QCM_BatOverTptFaultA

P10D340

QCM_BatOverTptFaultB

P100D40

CMU1 Thermal runaway fault

P108130

CMU2 Thermal runaway fault

P108230

Refer to Battery Thermal Runaway F

ault

CMU3 Thermal runaway fault

P108330

CMU4 Thermal runaway fault

P108430

CMU5 Thermal runaway fault

P108530

CMU6 Thermal runaway fault

P108630

Hard wire detection thermal runaway

P108730

fault

ExhT Sensor 1, short circuit the power

P102810

Refer to Left Exhaust Temperature

supply

Sensor Fault

ExhT Sensor 1, short circuit to ground

P102910

ExhT Sensor 2, short circuit the power

P102A10

Refer to Right Exhaust Temperature

supply

Sensor Fault

ExhT Sensor 2, short circuit to ground

P102B10

Abnormal rotation speed detection of

P10F340

MCU1

Abnormal rotation speed detection of

P10F440

MCU2

Abnormal rotation speed detection of

Refer to VDC Reports MCU Internal

P10F540

MCU3

Fault

Abnormal rotation speed detection of

P10F640

MCU4

NormRdyFltChkFailr_St

P10C040

P10E563

MCU failure

CMUx negative pole relay sticking

P10C630

together

QCM_BSTSocTarA

P10CB40

QCM_BSTTotalVTarA

P10CC40

QCM_BSTCSTEnA

P10CE40

Refer to VDC Reports Internal Fault In

QCM_HVRealyFaultA

P10D440

CMU

QCM_BSTSocTarB

P10D940

QCM_BSTTotalVTarB

P10DA40

QCM_BSTCSTEnB

P10DC40

QCM_HVRealyFaultB

P100E40

Fault Description

Troubleshooting

Fault Code

CMU1 total voltage is too high

P107430

CMU1 total voltage is too low

P107530

CMU2 total voltage is too high

P107630

CMU2 total voltage is too low

P107730

CMU3 total voltage is too high

P107830

CMU3 total voltage is too low

P107930

CMU4 total voltage is too high

P107A30

CMU4 total voltage is too low

P107B30

CMU5 total voltage is too high

P107C30

CMU5 total voltage is too low

P107D30

CMU6 total voltage is too high

P107E30

CMU6 total voltage is too low

P107F30

The voltage difference between

P108030

packages is too high

Battery failure

P10E061

QCM_BSTSingleVTarA

P10CD40

QCM_BSTSingleVTarB

P10DB40

CMU1 Cell overvoltage

P105030

CMU1 Cell undervoltage

P105130

CMU2 Cell overvoltage

P105430

CMU2 Cell undervoltage

P105530

CMU3 Cell overvoltage

P105830

CMU3 Cell undervoltage

P105930

CMU4 Cell overvoltage

P105C30

CMU4 Cell undervoltage

P105D30

Refer to VDC Reports Abnormal

Voltage Of CMU Unit

CMU5 Cell overvoltage

P106030

CMU5 Cell undervoltage

P106130

CMU6 Cell overvoltage

P106430

CMU6 Cell undervoltage

P106530

CMU1 Cell volt difference is large

P106830

CMU2 Cell volt difference is large

P106930

CMU3 Cell volt difference is large

P106A30

CMU4 Cell volt difference is large

P106B30

CMU5 Cell volt difference is large

P106C30

CMU6 Cell volt difference is large

P106D30

P10AD40

TCU1 ratio verification error

Refer to VDC Reports TCU Internal

Fault

P10AE40

TCU4 ratio verification error

Fault Description

Troubleshooting

Fault Code

P10FB40

TCU2 ratio verification error

P10FC40

TCU3 ratio verification error

P10E663

TCU failure

P104E53

TCU4 Communication failure

P10F953

TCU2 Communication failure

Refer to VDC Reports TCU

Communication Fault

P10FA53

TCU3 Communication failure

P104D53

TCU1 Communication failure

P10B051

CMUAll Communication failure

PDU_PDU failure

P10E162

Refer to VDC Reports Internal Fault Of

PDU_DCAC failure

PDU

P10E262

PDU_DCDC failure

P10E362

P10B110

AGM1 feedback failure

P10B210

AGM2 feedback failure

Refer to Active Grille Shutter Fault

Grid Communication Fault - Left

P103B10

Grid Communication Failure - Right

P103C10

QCM_InsulationFaultA

P10CF40

QCM_InsulationFaultB

P10DD40

Refer to Insulation Fault

P109C30

Insulation fault LvC

P109D30

Insulation fault LvB

P109E30

Insulation fault LvA

The rate at which the working pressure

P10AC40

of the air pump rises is slow.

Refer to Air Compressor Fault

NormRdy_AirPChkFailr_St

P10C140

Abnormal heating during low-

P10C740

temperature charging

Abnormal cooling during high-

P10C840

Refer to Thermal Management System

temperature charging

Fault

Abnormal cooling during high-

P10CA40

temperature discharge

thermal management system failure

P10E462

Refer to CC2 Signal F

ailure

Charging Wake-up Abnormality

P103E10

Battery fan failure

P103410

Refer to Battery Fan Fault

Three-way valve A malfunction

P103510

Refer to Three Valve

Three-way valve A malfunction

P103510

Failure

Refer to Three Valve

Three-way valve B failure

P103810

Failure

Fault Description

Troubleshooting

Fault Code

Battery pump failure

P103710

Refer to Battery Water Pump Fault

Three-way valve B failure

P103810

FCT Sensor 1, open circuit

P102010

FCT Sensor 1, short circuit

P102110

FCT Sensor 2, open circuit

P102210

FCT Sensor 2, short circuit

P102310

Refer to Fast Charging Interface

Temperature Detection Signal Fault

FCT Sensor 3, open circuit

P102410

FCT Sensor 3, short circuit

P102510

FCT Sensor 4, open circuit

P102610

FCT Sensor 4, short circuit

P102710

Fast charge temperature check 1

P108830

Overtemperature LvA

Fast charge temperature check 2

P108930

Overtemperature LvA

Fast charge temperature check 3

P108A30

Overtemperature LvA

Fast charge temperature check 4

P108B30

Overtemperature LvA

Fast charge temperature check 1

P108C30

Overtemperature LvB

Fast charge temperature check 2

P108D30

Overtemperature LvB

Fast charge temperature check 3

P108E30

Overtemperature LvB

Fast charge temperature check 4

P108F30

Overtemperature LvB

Brake signal verification does not match

P103210

Brake pressure sensor 1 is faulty

P10B310

Refer to VDC Reports EBS Fault

Brake pressure sensor 2 is faulty

P10B410

Brake pressure monitoring

P10AB40

Refer to VDC IBS TCU Communication

P103F10

IBS communication failure

Fault

Compressor 1_TSH_Tsat_flt

P10B510

Compressor 2_TSH_Tsat_flt

P10C910

Refer to Battery Compressor Fault

P100A52

BLR1 Communication failure

P100B52

BLR2 Communication failure

QCM_OutputConOverTptFaultA

P10D040

Refer to Overheating During Charging

QCM_BMSOverTptFaultA

P10D140

QCM_ChrConFaultA

P10D240

Fault Description

Troubleshooting

Fault Code

QCM_OutputConOverTptFaultB

P10DE40

QCM_BMSOverTptFaultB

P10DF40

QCM_ChrConFaultB

P100C40

QCM_DetectionPoint2FaultA

P10D540

QCM_OtherFaultA

P10D640

QCM_BatCurOverFaultA

P10D740

QCM_BatVAbnorFaultA

P10D840

Refer to Charging Status Abnormal

QCM_DetectionPoint2FaultB

P100F40

QCM_OtherFaultB

P10F040

QCM_BatCurOverFaultB

P10F140

QCM_BatVAbnorFaultB

P10F240

VDC detects high-voltage interlock

Refer to VDC High-Voltage Interlock

P10A930

failure

Failure

FAirLoss_Flt_flg

P10C440

Refer to Abnormal Air Leakage In The

Braking System

RAirLoss_Flt_flg

P10C540

Low voltage power supply undervoltage

P100000

LvA

Low voltage power supply undervoltage

P100100

LvB

Low-voltage power supply overvoltage

P100200

Refer to VDC Power Fault

LvA

Low-voltage power supply overvoltage

P100300

LvB

DCDC1 output undervoltage

P100402

DCDC1 output overvoltage

P100502

DCDC2 output undervoltage

P100602

Refer to DCDC2 Voltage Output Fault

DCDC2 output overvoltage

P100702

P103310

Motor fan failure

Refer to Motor Fan Fault

Motor pump failure

Refer to Motor And Water Pump Fault

P103610

P104051

CMU1 Communication failure

P104151

CMU2 Communication failure

P104251

CMU3 Communication failure

Refer to VDC Reports CMU

Communication Fault

P104351

CMU4 Communication failure

P104451

CMU5 Communication failure

P104551

CMU6 Communication failure

P104652

PDU_PDU Communication failure

Refer to VDC Reports PDU

P104752

PDU_DCAC Communication failure

Communication Fault

P104852

PDU_DCDC Communication failure

P104953

MCU1 Communication failure

Refer to VDC Reports MCU

Communication Fault

P104A53

MCU2 Communication failure

Fault Description

Troubleshooting

Fault Code

P104B53

MCU3 Communication failure

P104C53

MCU4 Communication failure

Refer to VDC Reports GSM

P104F53

GSM Communication failure

Communication Fault

Refer to Left Battery Water Heater Fault

P100852

WPTC1 Communication failure

Refer to Fault In The Right Water Heater

P100952

WPTC2 Communication failure

Of The Battery

U120587

LIN flt status

Refer to VDC LIN Communication Fault

CMU1 Cell overtemp

P105230

CMU1 Cell undertemp

P105330

CMU2 Cell overtemp

P105630

CMU2 Cell undertemp

P105730

CMU3 Cell overtemp

P105A30

CMU3 Cell undertemp

P105B30

CMU4 Cell overtemp

P105E30

CMU4 Cell undertemp

P105F30

CMU5 Cell overtemp

P106230

CMU5 Cell undertemp

Refer to VDC Reports Abnormal CMU

P106330

Temperature

CMU6 Cell overtemp

P106630

CMU6 Cell undertemp

P106730

CMU1 Cell temp difference is large

P106E30

CMU2 Cell temp difference is large

P106F30

CMU3 Cell temp difference is large

P107030

CMU4 Cell temp difference is large

P107130

CMU5 Cell temp difference is large

P107230

CMU6 Cell temp difference is large

P107330

The temperature difference between

P10AA30

packages is too high

CMU1 Charge overcurrent LvB

P109030

CMU1 Charge overcurrent LvA

P109130

CMU2 Charge overcurrent LvB

P109230

CMU2 Charge overcurrent LvA

P109330

CMU3 Charge overcurrent LvB

P109430

Refer to VDC Reports CMU High

Voltage Circuit Fault

CMU3 Charge overcurrent LvA

P109530

CMU4 Charge overcurrent LvB

P109630

CMU4 Charge overcurrent LvA

P109730

CMU5 Charge overcurrent LvB

P109830

CMU5 Charge overcurrent LvA

P109930

Fault Description

Troubleshooting

Fault Code

CMU6 Charge overcurrent LvB

P109A30

CMU6 Charge overcurrent LvA

P109B30

CMU1 High voltage interlock fault

P109F30

CMU2 High voltage interlock fault

P10A030

CMU3 High voltage interlock fault

P10A130

Refer to VDC Reports CMU High

Voltage Interlock Fault

CMU4 High voltage interlock fault

P10A230

CMU5 High voltage interlock fault

P10A330

CMU6 High voltage interlock fault

P10A430

MCU1 High voltage interlock fault

P10A530

MCU2 High voltage interlock fault

P10A630

Refer to VDC Reports MCU High

Voltage Interlock Fault

MCU3 High voltage interlock fault

P10A730

MCU4 High voltage interlock fault

P10A830

NormupBnRlyChkFailr_St

P10AF40

Refer to CMU Wake-up Signal Fault

ChUpBnRlyChkFailr_St

P10BA40

NormRdy_Gear_ChkFailr_St

P10C240

Refer to VDC Reports GSM Internal

Fault

P10E763

GSM failure

NormRdy_Escl_ChkFailr_St

P10C340

Refer to ESCL Fault

P10E863

IBS failure

Refer to IBS Fault

7.2.4.5 Action Test List

By reading the "action test" on the fault diagnosis instrument, the working status of the relays and actuators controlled by VDC

can be checked without disassembling any parts. Before performing relevant fault diagnosis on the control system, performing an

action test is a prerequisite for troubleshooting, which can shorten the troubleshooting time.

Note

The data under normal conditions are listed in the table below for reference only. Never rely solely on these

reference values to determine whether a part has failed. Usually, a normal working vehicle can be compared with

the diagnosed vehicle in the same state to determine whether the diagnosed vehicle data is normal in the current

state.

a.Perform vehicle power-on operation.

b.Connect the diagnostic tool.

c.Select "VDC"/"Action Test".

d.Refer to the table below for proactive testing.

Diagnostic Tool Display

Diagnosis Description

Span Of Control

Test Parts

Items

According to the instructions of the

Drive water pump control

Motor water pump

diagnostic instrument, control the motor

Turn on/off

and water pump to turn on/off

Control the motor fan to turn on/off

Drive fan control

Motor fan

Turn on/off

according to the diagnostic instrument

instructions

Diagnostic Tool Display

Span Of Control

Diagnosis Description

Test Parts

Items

According to the instructions of the

Battery water pump 1

diagnostic instrument, control the battery

Turn on/off

control

water pump 1 to turn on/off

According to the instructions of the

Battery water pump 2

diagnostic instrument, control the battery

Turn on/off

control

water pump 2 to turn on/off

According to the instructions of the

Battery fan 1 control

Battery fan 1

diagnostic tool, control the battery fan 1 to

Turn on/off

turn on/off

According to the instructions of the

Battery fan 2 control

Battery fan 2

diagnostic tool, control the battery fan 2 to

Turn on/off

turn on/off

7.2.4.6 VDC Power Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Low voltage power

Power on, The low-voltage power supply is less than or

P100000

supply undervoltage

equal to 18V for 10s

LvA

Low voltage power

Power on, The low-voltage power supply is less than or

P100100

supply undervoltage

equal to 10V for 2s

LvB

1. Main battery

Low-voltage power

Power on, The low-voltage power supply is greater than

2. Low voltage

P100200

supply overvoltage

or equal to 32V for 10s

charging system

LvA

3. Wiring harness

Low-voltage power

Power on, The low-voltage power supply is greater than

4.VDC

P100300

supply overvoltage

or equal to 35V for 2s

LvB

DCDC1 output

HV Satus, The DCDC1 function takes effect, DCDC1

P100402

undervoltage

output voltage is less than or equal to 23V for 10s

DCDC1 output

HV Satus, The DCDC1 function takes effect, DCDC1

P100502

overvoltage

output voltage is greater than or equal to 32V for 10s

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check there are other module power fault codes besides VDC?

Check the main battery. Refer to Inspection Of The Main Battery

– Yes:

Check the low-voltage charging system. Refer to DCDC1 Low-voltage Charging System Fault

Next step

– No:

Step 4:Check the VDC power supply and grounding harness.

Step 5:VDC rewrites the configuration code, software reloads, and upgrades.

Step 6:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 7:Clear and confirm DTC.

7.2.4.7 VDC Communication Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Lost Communication

KL15 valid, 0x18032779x/0x18032760x lost, last for 5s

P10F752

With WPTC1/2

Lost Communication

KL15 valid, 0x1802277Ax/0x1802277Bx lost, last for 5s

P10F852

With BLR1/2

Lost Communication

KL15 valid, 0x18FF18FBx lost, last for 2s

U019887

With T-Box

Lost Communication

KL15 valid, 0x18FF1921x lost, last for 1s

U014087

With BDCU

Lost Communication

KL15 valid, 0x18FF3354x lost, last for 1s

U01A087

With SJB_UP

Lost Communication

KL15 valid, 0x18FDA54Fx lost, last for 1s

U019987

With DCM

Lost Communication

KL15 valid, 0x18FF2359x lost, last for 1s

U01A187

With SJB_UN

1.Wiring harness

Lost Communication

KL15 valid, 0x18FF1241x lost, last for 2s

U015687

2.VDC

With CDCU

Lost Communication

KL15 valid, 0x18082768x lost, last for 1s

U017487

With CMU01

Lost Communication

KL15 valid, 0x18082769x lost, last for 1s

U017587

With CMU02

Lost Communication

KL15 valid, 0x1808276Ax lost, last for 1s

U017687

With CMU03

Lost Communication

KL15 valid, 0x1808276Bx lost, last for 1s

U017787

With CMU04

Lost Communication

KL15 valid, 0x1808276Cx lost, last for 1s

U017887

With CMU05

Lost Communication

KL15 valid, 0x1808276Dx lost, last for 1s

U017987

With CMU06

Lost Communication

KL15 valid, 0x18012778x lost, last for 1s

U017A87

With PDU1

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Lost Communication

KL15 valid, 0x1804276Ex lost, last for 1s

U017B87

With PDU2

Lost Communication

KL15 valid, 0x1801276Fx lost, last for 1s

U017C87

With PDU3

Lost Communication

KL15 valid, 0x18012774x lost, last for 0.5s

U012A87

With MCU1

Lost Communication

KL15 valid, 0x18012775x lost, last for 0.5s

U012B87

With MCU2

Lost Communication

KL15 valid, 0x18012776x lost, last for 0.5s

U012C87

With MCU3

Lost Communication

KL15 valid, 0x18012777x lost, last for 0.5s

U012D87

With MCU4

Lost Communication

KL15 valid, 0x18012703x lost, last for 0.5s

U010187

With TCU1

Lost Communication

KL15 valid, 0x18012703x lost, last for 0.5s

U010287

With TCU2

Lost Communication

KL15 valid, 0x0C010305x lost, last for 0.5s

U01B387

With GSM

Lost Communication

KL15 valid, 0x18F0010Bx lost, last for 1s

U012187

With EBS

Lost Communication

KL15 valid, 0x18FECA2Fx lost, last for 5s

U013287

With ECAS

Lost Communication

KL15 valid, 0x18FE1250x lost, last for 1s

U012887

With EPB

PCAN2_Busoff

U008C88

Enter busoff

PCAN3_Busoff

U008D88

Enter busoff

PCAN4_Busoff

U008E88

Enter busoff

ChargrCAN_Busoff

U008B88

Enter busoff

CANFD7_Busoff

U007988

Enter busoff

CANFD10_Busoff

U008088

Enter busoff

2.Circuit Diagram

VDC

120Ω

C94-10

C94-9

Battery PCAN2-L PL02

Battery PCAN2-H PH02

Battery PCAN2-L PL02

Battery PCAN2-H PH02

I_C_LP

I3_C_B

I1_LP_C

I3_B_C

Battery PCAN2-L PL02

Battery PCAN2-H PH02

Battery PCAN

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the PCAN1 bus communication harness. Refer to Inspection Of PCAN1 Bus Network Integrity

Step 4:Check the PCAN2 bus communication harness. Refer to Inspection Of PCAN2 Bus Network Integrity

Step 5:Check the PCAN3 bus communication harness. Refer to Inspection Of PCAN3 Bus Network Integrity

Step 6:Check the PCAN4 bus communication harness. Refer to Inspection Of PCAN4 Bus Network Integrity

Step 7:Check the CANFD7 bus communication harness. Refer to Inspection Of CANFD7 Bus Network Integrity

Step 8:VDC rewrites the configuration code, software reloads, and upgrades.

Step 9:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 10:Clear and confirm DTC.

7.2.4.8 VDC Internal Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Power on, The AD value is greater than or equal to

HTP_P Sensor 1,

P101010

4120 for 10s

short circuit

HTP_P Sensor 1,

Power on, The AD value is less than or equal to 20 for

P101110

open circuit

10s

Power on, The AD value is greater than or equal to

HTP_P Sensor 2,

P101210

4120 for 10s

short circuit

HTP_P Sensor 2,

Power on, The AD value is less than or equal to 20 for

P101310

open circuit

10s

Power on, The AD value is greater than or equal to

LTP_P Sensor 1, short

P101410

4120 for 10s

circuit

Power on, The AD value is less than or equal to 20 for

LTP_P Sensor 1, open

P101510

10s

circuit

Power on, The AD value is greater than or equal to

LTP_P Sensor 2, short

P101610

4120 for 10s

circuit

Power on, The AD value is less than or equal to 20 for

LTP_P Sensor 2, open

1.VDC

P101710

10s

circuit

Power on, The AD value is greater than or equal to

HPT_T Sensor 1, open

P101810

4100 for 10s

circuit

Power on, The AD value is less than or equal to 40 for

HPT_T Sensor 1, short

P101910

10s

circuit

Power on, The AD value is greater than or equal to

HPT_T Sensor 2, open

P101A10

4100 for 10s

circuit

Power on, The AD value is less than or equal to 40 for

HPT_T Sensor 2, short

P101B10

10s

circuit

Power on, The AD value is greater than or equal to

LPT_T Sensor 1, open

P101C10

4100 for 10s

circuit

Power on, The AD value is less than or equal to 40 for

LPT_T Sensor 1, short

P101D10

10s

circuit

Power on, The AD value is greater than or equal to

LPT_T Sensor 2, open

P101E10

4100 for 10s

circuit

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Power on, The AD value is less than or equal to 40 for

LPT_T Sensor 2, short

P101F10

10s

circuit

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:VDC rewrites the configuration code, software reloads, and upgrades.

Step 4:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 5:Clear and confirm DTC.

7.2.4.9 Accelerator Pedal Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Power on, The AD value is greater than or equal to

AccPed 1, short circuit

P102C10

3250 for 10s

Power on, The AD value is greater than or equal to

AccPed 2, short circuit

P102D10

1650 for 10s

Power on, The AD value is less than or equal to 550 for

AccPed 1, open circuit

P102E10

10s

Power on, The AD value is less than or equal to 250 for

1.Wiring harness

AccPed 2, open circuit

P102F10

10s

2.Accelerator

pedal

The calibration values

Power on, The ratio of accelerator pedal opening is not

3.VDC

of the two accelerator

in the range of 1.5 to 2.5, Less than or equal to 1.4 or

P103010

greater than or equal to 2.6 lasts for 10s

pedals do not match

Power on, The AD1 value is greater than or equal to

Both accelerator

3250 and the AD2 value is greater than or equal to

pedals malfunction

P103110

1650 for 10s, Or the AD1 value is less than or equal to

simultaneously

550 and the AD2 value is less than or equal to 250 for

10s

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the wiring harness between the accelerator pedal and VDC.

Step 4:Check the resistance of the accelerator pedal at different openings is normal?

Accelerator Pedal Angle

Signal Output Voltage

Sensor

Accelerator pedal sensor 1

0°

0.375 ± 0.05V

Accelerator pedal sensor 2

0°

0.375 ± 0.05V

Accelerator pedal sensor 1

13.1°

3.84 ± 0.1V

Accelerator pedal sensor 2

13.1°

1.92 ± 0.1V

Next step

– Yes:

Replace the accelerator pedal. Refer to Replacement Of Accelerator Pedal Assembly

– No:

Step 5:VDC rewrites the configuration code, software reloads, and upgrades.

Step 6:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 7:Clear and confirm DTC.

7.2.4.10 Left High Pressure & Temperature Sensor Fault

1.Circuit Diagram

2. Diagnostic Steps

Step 1:Routine Inspection. Refer to Routine Inspection

Step 2:Check the wiring harness between the left thermal management unit (left high pressure & temperature sensor) and

VDC.

Step 3:Check and replace the left thermal management unit (high pressure & temperature sensor). Refer to Replacement Of

Thermal Management Unit (Left)

Step 4:VDC rewrites the configuration code, software reloads, and upgrades.

Step 5:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

7.2.4.11 Right High Pressure & Temperature Sensor Fault

1.Circuit Diagram

2. Diagnostic Steps

Step 1:Routine Inspection. Refer to Routine Inspection

Step 2:Check the wiring harness between the right thermal management unit (right high pressure & temperature sensor) and

VDC.

Step 3:Replace the right thermal management unit (right high pressure & temperature sensor). Refer to Replacement Of

Thermal Management Unit (Right)

Step 4:VDC rewrites the configuration code, software reloads, and upgrades.

Step 5:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

7.2.4.12 Motor Coolant Level Sensor Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Wiring harness

The motor liquid level

2. Motor cooling

Power on, The hard cable fault signal lasts for 10s

P103910

sensor is short of liquid

liquid level sensor

3.VDC

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the wiring harness between the motor coolant level sensor and VDC.

Step 4:Check the motor coolant level sensor ground harness.

Step 5:Check the motor coolant level sensor is normal?

Liquid Level Status

Switch Status

Liquid level

The motor coolant level sensor has a signal

No liquid level

Motor coolant level sensor has no signal

Next step

– Yes:

Replace the motor coolant level sensor.

– No:

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.13 Battery Coolant Level Sensor Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Wiring harness

The battery liquid level

2.Battery coolant

Power on, The hard cable fault signal lasts for 10s

P103A10

sensor is short of liquid

level sensor

3.VDC

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the wiring harness between the battery coolant level sensor and VDC.

Step 4:Check the battery coolant level sensor grounding harness.

Step 5:Check the battery coolant level sensor is normal?

Liquid Level Status

Switch Status

Liquid level

Battery coolant level sensor has signal

No liquid level

Battery coolant level sensor no signal

Next step

– Yes:

Replace the Battery coolant level sensor.

– No:

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.14 Motor Fan Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Wiring harness

Power on, The power supply is valid, the fan is enabled,

P103310

Motor fan failure

2. Motor fan

and the hard cable fault signal is valid for 10 seconds

3.VDC

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the motor fan power supply and grounding harness.

Step 4:Check the wiring harness between the motor fan and VDC.

Step 5:Enter the diagnostic instrument interface VDC-action test and perform the "motor fan, open/close" action test. Check

the motor fan operates according to the diagnostic tool instructions.

Next step

– Yes:

Replace the motor fan. Refer to Replacement Of Front End Module

– No:

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.15 Motor And Water Pump Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Wiring harness

Power on, The power supply is valid, the fan is enabled,

2.Motor pump

Motor pump failure

P103610

and the hard cable fault signal is valid for 10 seconds

failure

3.VDC

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the power supply and grounding harness of the motor and water pump.

Step 4:Check the wiring harness between the motor water pump and VDC.

Step 5:Enter the VDC-action test of the diagnostic instrument interface and perform the "motor water pump, open/close" action

test. Check the motor water pump operates according to the instructions of the diagnostic tool.

Next step

– Yes:

Replace the motor water pump. Refer to Replacement Of Electronic Water Pump

– No:

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.16 Battery Thermal Runaway Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Chilled fluid shortage fault of the unit:

When the ambient temperature is ≥5℃, if the VDC

detects that the high-pressure pressure value is less

than 0.2 Mpa and this condition persists for more than 5

seconds, it is determined that the battery thermal

management system lacks chilled fluid. Both

compressors and fans on both sides are prohibited from

operating, while the water pump operates normally. A

battery thermal management system failure is reported,

and when the battery thermal management system is in

non-cooling mode, the fault level is level 1; when it is in

cooling mode, the fault level is level 2.

Chilled fluid shortage fault of the unit:

The unit is short of

①When the ambient temperature is ≥5℃, if the VDC

P103D10

1.Battery pack

refrigerant

detects that both the high-pressure and low-pressure

2. Wiring harness

pressure values are simultaneously less than 0.2 Mpa

3.VDC

and this condition persists for more than 5 seconds, it is

determined that the battery thermal management

system lacks chilled fluid.

②After the compressor is turned on for 5 minutes, if

the increase in the high-pressure pressure after the

compressor starts is less than 200 kPa and the

decrease in the low-pressure pressure is less than 100

kPa, it is determined that the battery thermal

management system lacks chilled fluid. When either of

the above two conditions occurs, the compressor is

prohibited from starting and a chilled fluid shortage fault

is reported.

QCM_

Battery pack overtemperature (A gun)

P10D340

BatOverTptFaultA

Description

DTC Trigger Conditions

Faulty Part

DTC Code

QCM_

Battery pack overtemperature (B gun)

P100D40

BatOverTptFaultB

CMU1 Thermal

CMU1 Thermal runaway is valid; Power-off clear

P108130

runaway fault

CMU2 Thermal

CMU2 Thermal runaway is valid; Power-off clear

P108230

runaway fault

CMU3 Thermal

CMU3 Thermal runaway is valid; Power-off clear

P108330

runaway fault

CMU4 Thermal

CMU4 Thermal runaway is valid; Power-off clear

P108430

runaway fault

CMU5 Thermal

CMU5 Thermal runaway is valid; Power-off clear

P108530

runaway fault

CMU6 Thermal

CMU6 Thermal runaway is valid; Power-off clear

P108630

runaway fault

Hard wire detection

Hard wire thermal runaway is valid; Hard wire thermal

P108730

thermal runaway fault

runaway is invalid, automatically cleared

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check if the vehicle is experiencing thermal runaway?

Stop vehicle charging operations immediately.

Park the vehicle in a suitable temperature environment and let it sit.

– Yes:

Execute the operation to release the high voltage system.

Check vehicle thermal management system fault codes.

Next step

– No:

Step 4:Check the battery pack thermal runaway signal harness.

Step 5:VDC rewrites the configuration code, software reloads, and upgrades.

Step 6:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 7:Clear and confirm DTC.

7.2.4.17 Brake Pedal Switch Fault

1.Circuit Diagram

2. Diagnostic Steps

Step 1:Routine Inspection. Refer to Routine Inspection

Step 2:Check the brake pedal switch power supply and grounding harness.

Step 3:Check the wiring harness between the brake pedal switch and VDC.

Step 4:Check the brake pedal switch is normal?

Pedal status

Switch status

Depress the brake pedal

Brake pedal switch on

Release the brake pedal

Brake pedal switch disconnected

Next step

– Yes:

Replace the brake pedal switch. Refer to Replacement Of Brake Pedal Assembly

– No:

Step 5:VDC rewrites the configuration code, software reloads, and upgrades.

Step 6:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

7.2.4.18 Left Low Pressure & Temperature Sensor Fault

1.Circuit Diagram

2. Diagnostic Steps

Step 1:Routine Inspection. Refer to Routine Inspection

Step 2:Check the wiring harness between the left thermal management unit (left low pressure & temperature sensor) and

VDC.

Step 3:Replace the left thermal management unit (left low pressure & temperature sensor). Refer to Replacement Of Thermal

Management Unit (Left)

Step 4:VDC rewrites the configuration code, software reloads, and upgrades.

Step 5:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

7.2.4.19 Right Low Pressure & Temperature Sensor Fault

1.Circuit Diagram

2. Diagnostic Steps

Step 1:Routine Inspection. Refer to Routine Inspection

Step 2:Check the wiring harness between the right thermal management unit (right low pressure & temperature sensor) and

VDC.

Step 3:Replace the right thermal management unit (right low pressure & temperature sensor).

Step 4:VDC rewrites the configuration code, software reloads, and upgrades.

Step 5:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

7.2.4.20 Left Exhaust Temperature Sensor Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Wiring harness

ExhT Sensor 1, short

Power on, The AD value is greater than or equal to

2. Left thermal

circuit the power

P102810

3900 for 10s

management unit

supply

(left exhaust

temperature

ExhT Sensor 1, short

Power on, The AD value is less than or equal to 80 for

P102910

sensor)

circuit to ground

10s

3.VDC

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine inspection. Refer to Routine inspection

Step 3:Check the wiring harness between the left thermal management unit (left exhaust temperature sensor) and VDC.

Step 4:Replace the left thermal management unit (left exhaust temperature sensor). Refer to Replacement Of Thermal

Management Unit (Left)

Step 5:VDC rewrites the configuration code, software reloads, and upgrades.

Step 6:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 7:Clear and confirm DTC.

7.2.4.21 Right Exhaust Temperature Sensor Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Wiring harness

ExhT Sensor 2, short

Power on, The AD value is greater than or equal to

2. Right thermal

circuit the power

P102A10

3900 for 10s

management unit

supply

(right exhaust

temperature

ExhT Sensor 2, short

Power on, The AD value is less than or equal to 80 for

P102B10

sensor)

circuit to ground

10s

3.VDC

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the wiring harness between the right thermal management unit (right exhaust temperature sensor) and VDC.

Step 4:Replace the right thermal management unit (right exhaust temperature sensor).

Step 5:VDC rewrites the configuration code, software reloads, and upgrades.

Step 6:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 7:Clear and confirm DTC.

7.2.4.22 VDC Reports MCU Internal Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Abnormal rotation

The average fluctuation error value of the rotational

P10F340

speed detection of

speed within 100 cycles exceeds 20 rpm for more than

MCU1

10 seconds.

Abnormal rotation

The average fluctuation error value of the rotational

P10F440

speed detection of

speed within 100 cycles exceeds 20 rpm for more than

MCU2

10 seconds.

Abnormal rotation

The average fluctuation error value of the rotational

1.VDC

P10F540

speed detection of

speed within 100 cycles exceeds 20 rpm for more than

2. Electric drive

MCU3

10 seconds.

module

Abnormal rotation

The average fluctuation error value of the rotational

P10F640

speed detection of

speed within 100 cycles exceeds 20 rpm for more than

MCU4

10 seconds.

KL15 ON,After the vehicle is on the high voltage, the

NormRdyFltChkFailr_

brakes are stepped on, and the driving fault is

P10C040

prohibited

The MCU reports fault level and fault code

P10E563

MCU failure

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check there are MCU related fault codes?

Prioritize troubleshooting MCU related faults.

– Yes:

Nex step

– No:

Step 4:Rewrite the configuration code, reload the software, and upgrade the electric drive module.

Step 5:Replace the electric drive module. Refer to Replacement Of Integrated axle - Medium axle.Replacement Of Integrated

axle - Rear axle

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.23 VDC Reports MCU Communication Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

MCU1 Communication

KL15 valid, 0x18012774x lost, last for 5s

P104953

failure

MCU2 Communication

1.Wiring harness

KL15 valid, 0x18012775x lost, last for 5s

P104A53

failure

2. Electric drive

module

MCU3 Communication

KL15 valid, 0x18012776x lost, last for 5s

P104B53

3.VDC

failure

MCU4 Communication

KL15 valid, 0x18012777x lost, last for 5s

P104C53

failure

2. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine inspection. Refer to Routine inspection

Step 3:Check there are MCU related fault codes?

Prioritize troubleshooting MCU related faults.

– Yes:

Next step

– No:

Step 4:Check the PCAN4 bus communication harness. Refer to Inspection Of PCAN4 Bus Network Integrity

Step 5:Rewrite the configuration code, reload the software, and upgrade the electric drive module.

Step 6:Replace the electric drive module. Refer to Replacement Of Integrated axle - Medium axle.Replacement Of Integrated

axle - Rear axle

Step 7:VDC rewrites the configuration code, software reloads, and upgrades.

Step 8:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 9:Clear and confirm DTC.

7.2.4.24 VDC Reports MCU High Voltage Interlock Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

MCU1 High voltage interlock valid(1s),invalid(1s),

MCU1 High voltage

1. High voltage

P10A530

automatically cleared

interlock fault

wiring harness

MCU2 High voltage interlock valid(1s),invalid(1s),

MCU2 High voltage

2. High-voltage

P10A630

automatically cleared

interlock fault

interlocking

wiring harness

MCU3 High voltage interlock valid(1s),invalid(1s),

MCU3 High voltage

P10A730

3. Electric drive

automatically cleared

interlock fault

module

MCU4 High voltage interlock valid(1s),invalid(1s),

MCU4 High voltage

P10A830

4.VDC

automatically cleared

interlock fault

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check there are MCU related fault codes?

Prioritize troubleshooting MCU related faults.

– Yes:

Nex step

– No:

Step 4:Check the high-voltage wiring harness of each high-voltage component.

Step 5:Check the high-voltage interlock wiring harness of each high-voltage component.

Step 6:Rewrite the configuration code, reload the software, and upgrade the electric drive module.

Step 7:Replace the electric drive module. Refer to Replacement Of Integrated axle - Medium axle.Replacement Of Integrated

axle - Rear axle

Step 8:VDC rewrites the configuration code, software reloads, and upgrades.

Step 9:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 10:Clear and confirm DTC.

7.2.4.25 VDC Reports Internal Fault In CMU

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

CMUx negative pole

The CMU negative-level relay does not respond to the

P10C630

relay sticking together

VDC disconnection command within 3 seconds.

SOC reaches target value (Gun A)

QCM_BSTSocTarA

P10CB40

Total pressure reaches target value (Gun A)

QCM_BSTTotalVTarA

P10CC40

CSTenabled (A gun)

QCM_BSTCSTEnA

P10CE40

QCM_HVRealyFaultA

High-voltage relay fault (A gun)

P10D440

SOC reaches target value (Gun B)

QCM_BSTSocTarB

P10D940

Total voltage reaches target value (Gun B)

QCM_BSTTotalVTarB

P10DA40

CSTenabled (Gun B)

QCM_BSTCSTEnB

P10DC40

QCM_HVRealyFaultB

High-voltage relay fault (B gun)

P100E40

1.VDC

NCM：中航: VPack1≥874V(4.28*204)(2s)，≤871V

2.Battery pack

(4.27*204) cleear(2s) 亿纬: VPack1≥878V(4.30*204)

CMU1 total voltage is

(2s)，≤875V(4.29*204) cleear((2s) LFP：

P107430

too high

VPack1≥869V(3.65*238)(2s)，≤866V(3.64*238) cleear

(2s)

NCM：中航/亿纬VPack1≤xV(m*204)V(2s)，≥yV

(n*204)V cleear(2s) Tmin>15: x=530.4,m=2.6,y=540.6,

n=2.65 Tmin∈(0,15]: x=489.6,m=2.4,y=499.8,n=2.45

Tmin<=0: x=428.4,m=2.1,y=438.6,n=2.15 LFP：

CMU1 total voltage is

P107530

VPack1≤xV(m*238)V(2s)，≥yV(n*238)V cleear(2s)

too low

Tmin>15: x=571.2,m=2.4,y=583.1,n=2.45 Tmin∈(0,15]:

x=547.4,m=2.3,y=559.3,n=2.35 Tmin<=0: x=476,m=

2.0,y=487.9,n=2.05

Description

DTC Trigger Conditions

Faulty Part

DTC Code

NCM：中航: VPack2≥874V(4.28*204)(2s)，≤871V

(4.27*204) cleear(2s) 亿纬: VPack2≥878V(4.30*204)

CMU2 total voltage is

(2s)，≤875V(4.29*204) cleear((2s) LFP：

P107630

too high

VPack2≥869V(3.65*238)(2s)，≤866V(3.64*238) cleear

(2s)

NCM：中航/亿纬VPack2≤xV(m*204)V(2s)，≥yV

(n*204)V cleear(2s) Tmin>15: x=530.4,m=2.6,y=540.6,

n=2.65 Tmin∈(0,15]: x=489.6,m=2.4,y=499.8,n=2.45

Tmin<=0: x=428.4,m=2.1,y=438.6,n=2.15 LFP：

CMU2 total voltage is

P107730

VPack2≤xV(m*238)V(2s)，≥yV(n*238)V cleear(2s)

too low

Tmin>15: x=571.2,m=2.4,y=583.1,n=2.45 Tmin∈(0,15]:

x=547.4,m=2.3,y=559.3,n=2.35 Tmin<=0: x=476,m=

2.0,y=487.9,n=2.05

NCM：中航: VPack3≥874V(4.28*204)(2s)，≤871V

(4.27*204) cleear(2s) 亿纬: VPack3≥878V(4.30*204)

CMU3 total voltage is

(2s)，≤875V(4.29*204) cleear((2s) LFP：

P107830

too high

VPack3≥869V(3.65*238)(2s)，≤866V(3.64*238) cleear

(2s)

NCM：中航/亿纬VPack3≤xV(m*204)V(2s)，≥yV

(n*204)V cleear(2s) Tmin>15: x=530.4,m=2.6,y=540.6,

n=2.65 Tmin∈(0,15]: x=489.6,m=2.4,y=499.8,n=2.45

Tmin<=0: x=428.4,m=2.1,y=438.6,n=2.15 LFP：

CMU3 total voltage is

P107930

VPack3≤xV(m*238)V(2s)，≥yV(n*238)V cleear(2s)

too low

Tmin>15: x=571.2,m=2.4,y=583.1,n=2.45 Tmin∈(0,15]:

x=547.4,m=2.3,y=559.3,n=2.35 Tmin<=0: x=476,m=

2.0,y=487.9,n=2.05

NCM：中航: VPack4≥874V(4.28*204)(2s)，≤871V

(4.27*204) cleear(2s) 亿纬: VPack4≥878V(4.30*204)

CMU4 total voltage is

(2s)，≤875V(4.29*204) cleear((2s) LFP：

P107A30

too high

VPack4≥869V(3.65*238)(2s)，≤866V(3.64*238) cleear

(2s)

NCM：中航/亿纬VPack4≤xV(m*204)V(2s)，≥yV

(n*204)V cleear(2s) Tmin>15: x=530.4,m=2.6,y=540.6,

n=2.65 Tmin∈(0,15]: x=489.6,m=2.4,y=499.8,n=2.45

Tmin<=0: x=428.4,m=2.1,y=438.6,n=2.15 LFP：

CMU4 total voltage is

P107B30

VPack4≤xV(m*238)V(2s)，≥yV(n*238)V cleear(2s)

too low

Tmin>15: x=571.2,m=2.4,y=583.1,n=2.45 Tmin∈(0,15]:

x=547.4,m=2.3,y=559.3,n=2.35 Tmin<=0: x=476,m=

2.0,y=487.9,n=2.05

Description

DTC Trigger Conditions

Faulty Part

DTC Code

NCM：中航: VPack5≥874V(4.28*204)(2s)，≤871V

(4.27*204) cleear(2s) 亿纬: VPack5≥878V(4.30*204)

CMU5 total voltage is

(2s)，≤875V(4.29*204) cleear((2s) LFP：

P107C30

too high

VPack5≥869V(3.65*238)(2s)，≤866V(3.64*238) cleear

(2s)

NCM：中航/亿纬VPack5≤xV(m*204)V(2s)，≥yV

(n*204)V cleear(2s) Tmin>15: x=530.4,m=2.6,y=540.6,

n=2.65 Tmin∈(0,15]: x=489.6,m=2.4,y=499.8,n=2.45

Tmin<=0: x=428.4,m=2.1,y=438.6,n=2.15 LFP：

CMU5 total voltage is

P107D30

VPack5≤xV(m*238)V(2s)，≥yV(n*238)V cleear(2s)

too low

Tmin>15: x=571.2,m=2.4,y=583.1,n=2.45 Tmin∈(0,15]:

x=547.4,m=2.3,y=559.3,n=2.35 Tmin<=0: x=476,m=

2.0,y=487.9,n=2.05

NCM：中航: VPack6≥874V(4.28*204)(2s)，≤871V

(4.27*204) cleear(2s) 亿纬: VPack6≥878V(4.30*204)

CMU6 total voltage is

(2s)，≤875V(4.29*204) cleear((2s) LFP：

P107E30

too high

VPack6≥869V(3.65*238)(2s)，≤866V(3.64*238) cleear

(2s)

NCM：中航/亿纬VPack5≤xV(m*204)V(2s)，≥yV

(n*204)V cleear(2s) Tmin>15: x=530.4,m=2.6,y=540.6,

n=2.65 Tmin∈(0,15]: x=489.6,m=2.4,y=499.8,n=2.45

Tmin<=0: x=428.4,m=2.1,y=438.6,n=2.15 LFP：

CMU6 total voltage is

P107F30

VPack5≤xV(m*238)V(2s)，≥yV(n*238)V cleear(2s)

too low

Tmin>15: x=571.2,m=2.4,y=583.1,n=2.45 Tmin∈(0,15]:

x=547.4,m=2.3,y=559.3,n=2.35 Tmin<=0: x=476,m=

2.0,y=487.9,n=2.05

The voltage difference

The voltage difference value between packages is

between packages is

greater than or equal to 10V for 15s; Power-off clear

P108030

CMU包间电压差值≥10V(15s); 下电清除

too high

Battery failure

The battery reports fault level and fault code

P10E061

2. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine inspection. Refer to Routine inspection

Step 3:Check there is a fault code related to the battery pack?

Prioritize troubleshooting related to battery packs.

– Yes:

Next step

– No:

Step 4:Rewrite the configuration code, reload the software, and upgrade the battery pack.

Step 5:Replace the battery pack. Refer to NCM Battery Pack Assembly 1 (AVIC 161Ah) Replacement.NCM Battery Pack

Assembly 2 (AVIC 161Ah) Replacement.NCM Battery Pack Assembly 3 (AVIC 161Ah) Replacement.NCM Battery Pack

Assembly 4 (AVIC 161Ah) Replacement

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.26 VDC Reports CMU High Voltage Circuit Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

CMU1 Charge

CMU1 current≥1.5*Look-up value+10(30s), Power-off

P109030

overcurrent LvB

clear

CMU1 current≥1.1*Look-up value+10(30s), CMU1

CMU1 Charge

P109130

current≤1.1*Look-up value+5(60s) automatically

overcurrent LvA

cleared

CMU2 Charge

CMU2 current≥1.5*Look-up value+10(30s), Power-off

P109230

overcurrent LvB

clear

CMU2 current≥1.1*Look-up value+10(30s), CMU2

CMU2 Charge

P109330

current≤1.1*Look-up value+5(60s)

overcurrent LvA

CMU3 Charge

CMU3 current≥1.5*Look-up value+10(30s), Power-off

P109430

overcurrent LvB

clear

CMU3 current≥1.1*Look-up value+10(30s), CMU3

CMU3 Charge

P109530

current≤1.1*Look-up value+5(60s) automatically

1. High voltage

overcurrent LvA

cleared

wiring harness

CMU4 Charge

CMU4 current≥1.5*Look-up value+10(30s), Power-off

2.Battery pack

P109630

overcurrent LvB

clear

3.VDC

CMU4 current≥1.1*Look-up value+10(30s), CMU4

CMU4 Charge

P109730

current≤1.1*Look-up value+5(60s) automatically

overcurrent LvA

cleared

CMU5 Charge

CMU5 current≥1.5*Look-up value+10(30s), Power-off

P109830

overcurrent LvB

clear

CMU5 current≥1.1*Look-up value+10(30s), CMU5

CMU5 Charge

P109930

current≤1.1*Look-up value+5(60s) automatically

overcurrent LvA

cleared

CMU6 Charge

CMU6 current≥1.5*Look-up value+10(30s), Power-off

P109A30

overcurrent LvB

clear

CMU6 current≥1.1*Look-up value+10(30s), CMU6

CMU6 Charge

P109B30

current≤1.1*Look-up value+5(60s) automatically

overcurrent LvA

cleared

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check whether there is a fault code related to the battery pack?

Prioritize troubleshooting related to battery packs.

– Yes:

Next step

– No:

Step 4:Check the battery pack high-voltage wiring harness.

Step 5:Check the internal insulation detection circuit of the battery pack.

Step 6:Rewrite the configuration code, reload the software, and upgrade the battery pack.

Step 7:Replace the battery pack. Refer to Replacement Of NCM Battery Pack Assembly 1 (AVIC 161Ah) .Replacement Of

NCM Battery Pack Assembly 2 (AVIC 161Ah) .Replacement Of NCM Battery Pack Assembly 2 (AVIC 161Ah) . Replacement

Of NCM Battery Pack Assembly 4 (AVIC 161Ah)

Step 8:VDC rewrites the configuration code, software reloads, and upgrades.

Step 9:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 10:Clear and confirm DTC.

7.2.4.27 VDC Reports CMU High Voltage Interlock Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

CMU1 High voltage

CMU1 Fault Code 23(1s), Power-off clear

P109F30

interlock fault

CMU2 High voltage

CMU2 Fault Code 23(1s), Power-off clear

P10A030

1. High voltage

interlock fault

wiring harness

CMU3 High voltage

CMU3 Fault Code 23(1s), Power-off clear

P10A130

2. High-voltage

interlock fault

interlocking

CMU4 High voltage

CMU4 Fault Code 23(1s), Power-off clear

wiring harness

P10A230

interlock fault

3.Battery pack

CMU5 High voltage

4.VDC

CMU5 Fault Code 23(1s), Power-off clear

P10A330

interlock fault

CMU6 High voltage

CMU6 Fault Code 23(1s), Power-off clear

P10A430

interlock fault

2. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine inspection. Refer to Routine inspection

Step 3:Check whether there is a fault code related to the battery pack?

Prioritize troubleshooting related to battery packs.

– Yes:

Next step

– No:

Step 4:Check the high-voltage wiring harness of each high-voltage component.

Step 5:Check the high-voltage interlock wiring harness of each high-voltage component.

Step 6:Rewrite the configuration code, reload the software, and upgrade the battery pack.

Step 7:Replace the battery pack. Refer to NCM Battery Pack Assembly 1 (AVIC 161Ah) Replacement.NCM Battery Pack

Assembly 2 (AVIC 161Ah) Replacement.NCM Battery Pack Assembly 3 (AVIC 161Ah) Replacement.NCM Battery Pack

Assembly 4 (AVIC 161Ah) Replacement

Step 8:VDC rewrites the configuration code, software reloads, and upgrades.

Step 9:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 10:Clear and confirm DTC.

7.2.4.28 VDC Reports Abnormal CMU Temperature

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

CMU1 Cell overtemp

TMaxCell1≥122℉(2s),≤113℉clear(2s)

P105230

CMU1 Cell undertemp

TMinCell1≤-4℉(2s),≥-2.2℉clear(2s)

P105330

CMU2 Cell overtemp

TMaxCell2≥122℉(2s),≤113℉clear(2s)

P105630

CMU2 Cell undertemp

TMinCell2≤-4℉(2s),≥-2.2℉clear(2s)

P105730

CMU3 Cell overtemp

TMaxCell3≥122℉(2s),≤113℉clear(2s)

P105A30

CMU3 Cell undertemp

TMinCell3≤-4℉(2s),≥-2.2℉clear(2s)

P105B30

CMU4 Cell overtemp

TMaxCell4≥122℉(2s),≤113℉clear(2s)

P105E30

CMU4 Cell undertemp

TMinCell4≤-4℉(2s),≥-2.2℉clear(2s)

P105F30

CMU5 Cell overtemp

TMaxCell5≥122℉(2s),≤113℉clear(2s)

P106230

CMU5 Cell undertemp

TMinCell5≤-4℉(2s),≥-2.2℉clear(2s)

P106330

CMU6 Cell overtemp

TMaxCell6≥122℉(2s),≤113℉clear(2s)

P106630

CMU6 Cell undertemp

TMinCell6≤-4℉(2s),≥-2.2℉clear(2s)

P106730

CMU1 Cell temp

1.Battery pack

TDiffCell1≥59℉(2s),≤53.6℉clear(2s)

P106E30

difference is large

2.VDC

CMU2 Cell temp

TDiffCell1≥59℉(2s),≤53.6℉clear(2s)

P106F30

difference is large

CMU3 Cell temp

TDiffCell1≥59℉(2s),≤53.6℉clear(2s)

P107030

difference is large

CMU4 Cell temp

TDiffCell1≥59℉(2s),≤53.6℉clear(2s)

P107130

difference is large

CMU5 Cell temp

TDiffCell1≥59℉(2s),≤53.6℉clear(2s)

P107230

difference is large

CMU6 Cell temp

TDiffCell1≥59℉(2s),≤53.6℉clear(2s)

P107330

difference is large

The temperature

The temperature difference value between packages is

difference between

greater than or equal to 59℉for 15s, less than or equal

P10AA30

packages is too high

to 53.6℉for 5s,automatically cleared

2. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine inspection. Refer to Routine inspection

Step 3:Check if there are any fault codes related to the battery pack?

Prioritize troubleshooting related to battery packs.

– Yes:

Next step

– No:

Step 4:Move the vehicle to a normal temperature environment and let it sit for a while.

Step 5:Check if the vehicle has any fault codes related to the thermal management system?

Prioritize troubleshooting related to thermal management systems.

– Yes:

Next step

– No:

Step 6:Rewrite the configuration code, reload the software, and upgrade the battery pack.

Step 7:Replace the battery pack. Refer to NCM Battery Pack Assembly 1 (AVIC 161Ah) Replacement.NCM Battery Pack

Assembly 2 (AVIC 161Ah) Replacement.NCM Battery Pack Assembly 3 (AVIC 161Ah) Replacement.NCM Battery Pack

Assembly 4 (AVIC 161Ah) Replacement

Step 8:VDC rewrites the configuration code, software reloads, and upgrades.

Step 9:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 10:Clear and confirm DTC.

7.2.4.29 VDC Reports Abnormal Voltage Of CMU Unit

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

QCM_

Cell voltage reaches target value (A gun)

P10CD40

BSTSingleVTarA

QCM_

Cell voltage reaches target value (Gun B)

P10DB40

BSTSingleVTarB

CMU1 Cell

中航/亿纬NCM：VMaxCell1≥4.316V(2s)，≤4.3V clear

P105030

overvoltage

(2s) LFP：VMaxCell1≥3.67V(2s)，≤3.6V clear(2s)

VMinCell1≤mV(2s)，≥nV clear(2s) 中航/亿纬NCM：

CMU1 Cell

Tmin>15: m=3.1,n=3.4 Tmin∈(0,15]: m=2.8,n=3.1

P105130

undervoltage

Tmin<=0: m=2.3,n=2.6 LFP：Tmin>15: m=2.75,n=3.1

Tmin∈(0,15]: m=2.45,n=2.9 Tmin<=0: m=2.2,n=2.6

CMU2 Cell

中航/亿纬NCM：VMaxCell2≥4.316V(2s)，≤4.3V clear

P105430

overvoltage

(2s) LFP：VMaxCell2≥3.67V(2s)，≤3.6V clear(2s)

1.Battery pack

2.VDC

VMinCell2≤mV(2s)，≥nV clear(2s) 中航/亿纬NCM：

CMU2 Cell

Tmin>15: m=3.1,n=3.4 Tmin∈(0,15]: m=2.8,n=3.1

P105530

undervoltage

Tmin<=0: m=2.3,n=2.6 LFP：Tmin>15: m=2.75,n=3.1

Tmin∈(0,15]: m=2.45,n=2.9 Tmin<=0: m=2.2,n=2.6

CMU3 Cell

中航/亿纬NCM：VMaxCell3≥4.316V(2s)，≤4.3V clear

P105830

overvoltage

(2s) LFP：VMaxCell3≥3.67V(2s)，≤3.6V clear(2s)

VMinCell3≤mV(2s)，≥nV clear(2s) 中航/亿纬NCM：

CMU3 Cell

Tmin>15: m=3.1,n=3.4 Tmin∈(0,15]: m=2.8,n=3.1

P105930

undervoltage

Tmin<=0: m=2.3,n=2.6 LFP：Tmin>15: m=2.75,n=3.1

Tmin∈(0,15]: m=2.45,n=2.9 Tmin<=0: m=2.2,n=2.6

CMU4 Cell

中航/亿纬NCM：VMaxCell4≥4.316V(2s)，≤4.3V clear

P105C30

overvoltage

(2s) LFP：VMaxCell4≥3.67V(2s)，≤3.6V clear(2s)

Description

DTC Trigger Conditions

Faulty Part

DTC Code

VMinCell4≤mV(2s)，≥nV clear(2s) 中航/亿纬NCM：

CMU4 Cell

Tmin>15: m=3.1,n=3.4 Tmin∈(0,15]: m=2.8,n=3.1

P105D30

undervoltage

Tmin<=0: m=2.3,n=2.6 LFP：Tmin>15: m=2.75,n=3.1

Tmin∈(0,15]: m=2.45,n=2.9 Tmin<=0: m=2.2,n=2.6

CMU5 Cell

中航/亿纬NCM：VMaxCell5≥4.316V(2s)，≤4.3V clear

P106030

overvoltage

(2s) LFP：VMaxCell5≥3.67V(2s)，≤3.6V clear(2s)

VMinCell5≤mV(2s)，≥nV clear(2s) 中航/亿纬NCM：

CMU5 Cell

Tmin>15: m=3.1,n=3.4 Tmin∈(0,15]: m=2.8,n=3.1

P106130

undervoltage

Tmin<=0: m=2.3,n=2.6 LFP：Tmin>15: m=2.75,n=3.1

Tmin∈(0,15]: m=2.45,n=2.9 Tmin<=0: m=2.2,n=2.6

CMU6 Cell

中航/亿纬NCM：VMaxCell6≥4.316V(2s)，≤4.3V clear

P106430

overvoltage

(2s) LFP：VMaxCell6≥3.67V(2s)，≤3.6V clear(2s)

VMinCell6≤mV(2s)，≥nV clear(2s) 中航/亿纬NCM：

CMU6 Cell

Tmin>15: m=3.1,n=3.4 Tmin∈(0,15]: m=2.8,n=3.1

P106530

undervoltage

Tmin<=0: m=2.3,n=2.6 LFP：Tmin>15: m=2.75,n=3.1

Tmin∈(0,15]: m=2.45,n=2.9 Tmin<=0: m=2.2,n=2.6

CMU1 Cell volt

VDiffCell1≥0.4V(2s)，≤0.25V clear(2s)

P106830

difference is large

CMU2 Cell volt

VDiffCell2≥0.4V(2s)，≤0.25V clear(2s)

P106930

difference is large

CMU3 Cell volt

VDiffCell3≥0.4V(2s)，≤0.25V clear(2s)

P106A30

difference is large

CMU4 Cell volt

VDiffCell4≥0.4V(2s)，≤0.25V clear(2s)

P106B30

difference is large

CMU5 Cell volt

VDiffCell5≥0.4V(2s)，≤0.25V clear(2s)

P106C30

difference is large

CMU6 Cell volt

VDiffCell6≥0.4V(2s)，≤0.25V clear(2s)

P106D30

difference is large

2. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine inspection. Refer to Routine inspection

Step 3:Check if there any fault codes related to the battery pack?

Prioritize troubleshooting related to battery packs.

– Yes:

Next step

– No:

Step 4:Rewrite the configuration code, reload the software, and upgrade the battery pack.

Step 5:Replace the battery pack. Refer to NCM Battery Pack Assembly 1 (AVIC 161Ah) Replacement.NCM Battery Pack

Assembly 2 (AVIC 161Ah) Replacement.NCM Battery Pack Assembly 3 (AVIC 161Ah) Replacement.NCM Battery Pack

Assembly 4 (AVIC 161Ah) Replacement

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.30 VDC Reports CMU Communication Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

CMU1 Communication

KL15 valid, 0x18082768x lost, last for 10s

P104051

failure

CMU2 Communication

KL15 valid, 0x18082769x lost, last for 10s

P104151

failure

CMU3 Communication

KL15 valid, 0x1808276Ax lost, last for 10s

P104251

1.Wiring harness

failure

2.Battery pack

CMU4 Communication

KL15 valid, 0x1808276Bx lost, last for 10s

3.VDC

P104351

failure

CMU5 Communication

KL15 valid, 0x1808276Cx lost, last for 10s

P104451

failure

CMU6 Communication

KL15 valid, 0x1808276Dx lost, last for 10s

P104551

failure

2. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine inspection. Refer to Routine inspection

Step 3:Check there is a fault code related to the battery pack?

Prioritize troubleshooting related to battery packs.

– Yes:

Next step

– No:

Step 4:Check the PCAN2 bus communication harness. Refer to Inspection Of PCAN2 Bus Network Integrity

Step 5:Rewrite the configuration code, reload the software, and upgrade the battery pack.

Step 6:Replace the battery pack. Refer to NCM Battery Pack Assembly 1 (AVIC 161Ah) Replacement.NCM Battery Pack

Assembly 2 (AVIC 161Ah) Replacement.NCM Battery Pack Assembly 3 (AVIC 161Ah) Replacement.NCM Battery Pack

Assembly 4 (AVIC 161Ah) Replacement

Step 7:VDC rewrites the configuration code, software reloads, and upgrades.

Step 8:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 9:Clear and confirm DTC.

7.2.4.31 VDC Reports TCU Internal Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. Electric drive

In gear mode, the corresponding error between TCU1

mid-axle vehicle

TCU1 ratio verification

output shaft speed and MCU1 speed is greater than

P10AD40

low-voltage

error

1000rpm(5s).

interface

2.VDC

Description

DTC Trigger Conditions

Faulty Part

DTC Code

In gear mode, the corresponding error between TCU2

TCU4 ratio verification

output shaft speed and MCU4 speed is greater than

P10AE40

error

1000rpm(5s).

In gear mode, the corresponding error between TCU2

TCU2 ratio verification

output shaft speed and MCU2 speed is greater than

P10FB40

error

1000rpm(5s).

In gear mode, the corresponding error between TCU3

TCU3 ratio verification

output shaft speed and MCU3 speed is greater than

P10FC40

error

1000rpm(5s).

The TCU reports fault level and fault code

P10E663

TCU failure

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check there is a TCU related fault code?

Prioritize troubleshooting related to TCU.

– Yes:

Next step

– No:

Step 4:Rewrite the configuration code, reload the software, and upgrade the low-voltage interface of the electric drive mid-axle

vehicle.

Step 5:Replace the low-voltage interface of the electric drive mid axle vehicle. Refer to Replacement Of Integrated axle -

Medium axle

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.32 VDC Reports TCU Communication Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

TCU4 Communication

KL15 valid, 0x18042704x lost, last for 5s

P104E53

failure

1.Wiring harness

TCU2 Communication

2. Electric drive

KL15 valid, 0x18042703x lost, last for 5s

P10F953

failure

mid-axle vehicle

low-voltage

TCU3 Communication

KL15 valid, 0x18012704x lost, last for 5s

P10FA53

interface

failure

3.VDC

TCU1 Communication

KL15 valid, 0x18012703x lost, last for 5s

P104D53

failure

2. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine inspection. Refer to Routine Inspection

Step 3:Check there is a TCU related fault code?

Prioritize troubleshooting related to TCU.

– Yes:

Next step

– No:

Step 4:Check the PCAN4 bus communication harness. Refer to Inspection Of PCAN4 Bus Network Integrity

Step 5:Rewrite the configuration code, reload the software, and upgrade the low-voltage interface of the electric drive mid-axle

vehicle.

Step 6:Replace the low-voltage interface of the electric drive mid axle vehicle. Refer to Replacement Of Integrated axle -

Medium axle

Step 7:VDC rewrites the configuration code, software reloads, and upgrades.

Step 8:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 9:Clear and confirm DTC.

7.2.4.33 VDC Reports Internal Fault Of PDU

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

KL15 electrical status: Complete loss of battery

CMUAll

P10B051

communication, sudden drop in PDU voltage;

Communication failure

1.Power

The PDU_PDU reports fault level and fault code

PDU_PDU failure

P10E162

distribution unit

2.VDC

The PDU_DCAC reports fault level and fault code

PDU_DCAC failure

P10E262

The PDU_DCDC reports fault level and fault code

PDU_DCDC failure

P10E362

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check if there is a fault code related to the power distribution unit?

Prioritize troubleshooting related to the power distribution unit.

– Yes:

Next step

– No:

Step 4:Rewrite the configuration code of the power distribution unit, reload the software, and upgrade.

Step 5:Replace the power distribution unit. Refer to Replacement Of Multi In One Power Distribution Assembly

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.34 VDC Reports PDU Communication Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

P104652

PDU_PDU

1.Wiring harness

KL15 valid, 0x18012778x lost, last for 10s

Communication failure

2.Power

distribution unit

P104752

PDU_DCAC

KL15 valid, 0x1804276Ex lost, last for 10s

3.VDC

Communication failure

Description

DTC Trigger Conditions

Faulty Part

DTC Code

P104852

PDU_DCDC

KL15 valid, 0x1801276Fx lost, last for 10s

Communication failure

2. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine inspection. Refer to Routine inspection

Step 3:Check if there is a fault code related to the power distribution unit?

Prioritize troubleshooting related to the power distribution unit.

– Yes:

Next step

– No:

Step 4:Check the PCAN3 bus communication harness. Refer to Inspection Of PCAN3 Bus Network Integrity

Step 5:Rewrite the configuration code of the power distribution unit, reload the software, and upgrade.

Step 6:Replace the power distribution unit. Refer to Replacement Of Multi in One Power Distribution Assembly

Step 7:VDC rewrites the configuration code, software reloads, and upgrades.

Step 8:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 9:Clear and confirm DTC.

7.2.4.35 VDC Reports GSM Internal Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

KL15 ON,After the vehicle is on the high voltage, the

NormRdy_Gear_

P10C240

1.Shift switch

brakes are stepped on, The gear is not in N gear

ChkFailr_St

2.VDC

The GSM reports fault level and fault code

P10E763

GSM failure

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check for shift switch related fault codes?

Prioritize troubleshooting related to shift switches.

– Yes:

Next step

– No:

Step 4:Rewrite the configuration code of the shift switch, reload the software, and upgrade.

Step 5:Replace the gear shift switch. Refer to Replacement Of Combination Switch

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.36 VDC Reports GSM Communication Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Wiring harness

GSM Communication

KL15 valid, 0x010305x lost, last for 10s.

P104F53

2.Shift switch

failure

3.VDC

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check for shift switch related fault codes?

Prioritize troubleshooting related to shift switches.

– Yes:

Next step

– No:

Step 4:Check the PCAN4 bus communication harness. Refer to Inspection Of PCAN4 Bus Network Integrity

Step 5:Rewrite the configuration code of the shift switch, reload the software, and upgrade.

Step 6:Replace the gear shift switch. Refer to Replacement Of Combination Switch

Step 7:VDC rewrites the configuration code, software reloads, and upgrades.

Step 8:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 9:Clear and confirm DTC.

7.2.4.37 VDC LIN Communication Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Wiring harness

U120587

LIN flt status

Enter flt status

2.VDC

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine inspection. Refer to Routine inspection

Step 3:Check the VDC LIN communication components and give priority to troubleshooting LIN communication component

failures.

Step 4:Check the LIN communication harness between VDC, intelligent battery sensor IBS, and active grille shutter.

Step 5:VDC rewrites the configuration code, software reloads, and upgrades.

Step 6:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 7:Clear and confirm DTC.

7.2.4.38 CMU Wake-up Signal Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

KL15 ON, VDC sends negative relay closed,6 CMUs

NormupBnRlyChkFail-

P10AF40

1. Wiring harness

have negative relay closed abnormally.(1.5s set up)

r_St

2.Battery pack

A+ ON,VDC sends negative relay closed,6 CMUs have

ChUpBnRlyChkFailr_

3.VDC

P10BA40

negative relay closed abnormally.(1.5s set up)

2.Circuit Diagram

Emergency

VDC-1

VDC-2

high voltage

plug-in 1-B

C93-114

C94-44

B86-2

Thermal runaway

Battery pack

power E119

Wake up

signal E139

-B+ O4153

Supply B+ O415

BMS Power

I_C_LP

I7_B_C

I1_LP_C

I7_C_B

Thermal runaway signal E139d

I_C_LP

Battery pack

-B+ O4153

Wake up power E119

I1_LP_C

Supply B+ O415

BMS Power

Thermal runaway signal E139a

Thermal runaway signal E139b

Wake up power E119a

Wake up power E119b

Power B+ O415a

Power B+ O415b

LP02-2

LP02-1

LP02-5

LP01-1

LP01-2

LP01-5

Upper left battery pack 1

Lower left battery pack 2

LP02-7

LP02-6

LP02-12

LP02-11

LP01-7

LP01-6

LP01-12

Identification ground Z57

Battery PCAN2-H

Battery PCAN2-L

Battery PCAN2-H

Battery PCAN2-L

Ground Z57

PH02a

PL02a

PH02b

PL02b

Ground

Z57

G06

VDC-1

VDC-2

C93-115

C94-44

Wake up power E147a

BMS Power Supply

Thermal runaway

B+ O4153

signal E139

I_C_RP

I1_RP_C

Thermal runaway

power E147a

Supply B+ O415d

Wake up

BMS Power

signal E139d

Thermal runaway signal E139d

Thermal runaway signal E139e

Wake up power E147a

Wake up power E147b

Power B+ O415d

Power B+ O415e

RP02-2

RP01-1

RP01-2

RP02-1

RP01-5

RP02-5

Upper right battery pack 3

Lower right battery pack 4

RP01-7

RP01-6 RP01-12

RP02-7

RP02-6

RP02-12

RP01-10

RP02-10

RP02-11

Identification ground Z57

Battery PCAN2-L

Battery PCAN2-H

Battery PCAN2-L

Battery PCAN2-H

Ground Z57

PL02d

PH02d

PL02e

PH02e

Ground

Z57

G06

3.Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check if there is a fault code related to the battery pack?

Prioritize troubleshooting related to battery packs.

– Yes:

Nex step

– No:

Step 4:Check the wake-up signal harness between VDC and the battery pack.

Step 5:Rewrite the configuration code, reload the software, and upgrade the battery pack.

Step 6:Replace the battery pack. Refer to Replacement Of NCM Battery Pack Assembly 1 (AVIC 161Ah) .Replacement Of

NCM Battery Pack Assembly 2 (AVIC 161Ah) .Replacement Of NCM Battery Pack Assembly 2 (AVIC 161Ah) . Replacement

Of NCM Battery Pack Assembly 4 (AVIC 161Ah)

Step 7:VDC rewrites the configuration code, software reloads, and upgrades.

Step 8:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 9:Clear and confirm DTC.

7.2.4.39 PDU Wake-up Signal Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

KL15 ON, The auxiliary drive relay and the main drive

NormupPduadhnChk-

P10B640

relay have sticking faults(1.5s set up)

Failr_St

NormupAux_Drv_

KL15 ON,VDC sends auxiliary drive relay closed, the

P10B740

RlyChkFailr_St

auxiliary drive relay is closed abnormally.(1.5s set up)

KL15 ON,VDC sends DCDC1 and DCDC2 to be

NormupDC_

enabled, the output voltage of DCDC1 or DCDC2 is

P10B840

OutVChkFailr_St

Less than(2s set up)

NormupMain_Drv_

KL15 ON,VDC sends the maindrive relay closed, and

P10B940

RlyChkFailr_St

the main drive relay closes abnormally(1.5s set up)

1.Wiring harness

A+ ON, The auxiliary drive relay and the Charg relay

ChUpPduadhnChkFai-

2.Power

P10BB40

have sticking faults(1.5s set up)

lr_St

distribution unit

3.VDC

A+ ON,The charging interaction is not complete(100s

ChUpPDUIsnOnChkF-

P10BC40

set up)

ailr_St

A+ ON,VDC sends Charg relay closed, the Charg relay

ChUpChpRlyChkFailr_

P10BD40

is closed abnormally.(1.5s set up)

ChUpAux_Drv_

A+ ON,VDC sends auxiliary drive relay closed, the

P10BE40

RlyChkFailr_St

auxiliary drive relay is closed abnormally.(1.5s set up)

A+ ON,VDCsends DCDC1 and DCDC2 to be enabled,

ChUpDC_

the output voltage of DCDC1 or DCDC2 is Less than(2s

P10BF40

OutVChkFailr_St

set up)

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check if there is a fault code related to the power distribution unit?

Prioritize troubleshooting related to the power distribution unit.

– Yes:

Next step

– No:

Step 4:Check the wake-up signal harness between VDC and power distribution unit.

Step 5:Rewrite the configuration code of the power distribution unit, reload the software, and upgrade.

Step 6:Replace the power distribution unit. Refer to Replacement Of Multi In One Power Distribution Assembly

Step 7:VDC rewrites the configuration code, software reloads, and upgrades.

Step 8:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 9:Clear and confirm DTC.

7.2.4.40 DCDC2 Voltage Output Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

DCDC2 output

HV Satus, The DCDC2 function takes effect, DCDC2

1.Wiring harness

P100602

undervoltage

output voltage is less than or equal to 23V for 10s)

2.Power

distribution unit

DCDC2 output

HV Satus, The DCDC2 function takes effect, DCDC2

P100702

3.VDC

overvoltage

output voltage is greater than or equal to 32V for 10s

2.Circuit Diagram

Smart Junction Box - Body

DCDC2+

DC/DC2 power

Ground

I2_B_BE

I2_BE_B

supply L20a

supply L20

supply L21

Z22

B02-1

BE08-1

BE03-1

DC/DC2 power

I1_B_BE

I1_BE_B

supply L20

supply L20b

B03-1

G20

Motor fan 1

Motor fan 1 Power supply P4H

I6_B_C

I6_C_B

Motor fan 1 Power supply P4H

B04-1

C84-1

Motor Fan 2

I6_B_C

I6_C_B

Motor Fan 2 Power supply P4S

B05-1

C83-1

Motor fan 3

I6_B_C

I6_C_B

Motor Fan 3 Power supply P4B

B06-1

C82-1

Motor water

pump 1

I1_B_C

I1_C_B

Motor water pump 1 P4F

B11-3

Motor water pump 1 P4F

C54-4

Motor water

pump 2

I1_B_C

I1_C_B

B11-1

Motor water pump 2 P4P

C53-4

Left thermal

management unit 1

I1_B_C

I1_C_B

Left battery water pump P4A

B10-3

Left battery pump + P4A

C88-35

Right thermal

management unit 1

I1_B_C

I1_C_B

Right battery water pump P4K

Right battery pump + P4K

B10-1

C89-35

Left thermal

management unit 2

I2_B_C

I2_C_B

Left battery fan 1 P4E

Left battery fan 1+ P4E

B10-4

C86-1

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the low-voltage power supply line of the thermal management unit of the power distribution unit (integrated

DCDC).

Step 4:Rewrite the configuration code of the power distribution unit, reload the software, and upgrade.

Step 5:Replace the power distribution unit. Refer to Replacement Of Multi In One Power Distribution Assembly

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.41 Active Grille Shutter Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

AGM1CtlFrm_Status=4/5/6/7，或VaneActFalt_B_Actl=

1或VaneSnsFalt_B_Actl=1或VaneUUnd_B_Actl=0或

P10B110

AGM1 feedback failure

VaneBlck_B_Actl=1或VaneElFalt_B_Actl=1或

VaneTeOvr_B_Actl=1

1.Wiring harness

AGM2CtlFrm_Status=4/5/6/7，或VaneActFalt_B_

2.Active grille

Actl2=1或VaneSnsFalt_B_Actl2=1或VaneUUnd_B_

shutter

P10B210

AGM2 feedback failure

Actl2=0或VaneBlck_B_Actl2=1或VaneElFalt_B_Actl2=

3.VDC

1或VaneTeOvr_B_Actl2=1

Left grid motor failure

Power on, The grille failure lasts for 10s

P103B10

Right grid motor failure

Power on, The grille failure lasts for 10s

P103C10

2.Circuit Diagram

Smart Junction

Battery

Box - Chassis

Right thermal

Left thermal

management

unit 1

C4-7

C88-5

C89-5

WPTC-KL30+AGS O407

VDC-2

supply KL30 O407a

supply KL30 O407b

WPTC Power

Battery

C94-7

C94-18

C94-75

IIBS/AGSLIN cable E251

AGS-KL30 O407

I7_C_B

Ground Z56

I7_B_C

Shutter LIN E251

AGS-KL30 O407a

Active Grille

G22

G06

I_B_BU

Battery liquid level alarm signal E126

Motor liquid level alarm signal E143

I_BU_B

Ground connection Z56

AGS-KL30 O407a

AGS-LIN E251c

Ground Z56

Ground Z01

BU05-1

BU05-2

BU05-3

C41-1

C41-2

C40-2

C40-1

Coolant level

Active Grille Shutter

sensor

23. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the power supply and grounding harness of the active grille shutter.

Step 4:Check the LIN communication harness between VDC and the active grille shutter.

Step 5:Replace the active grille shutter. Refer to Replacement Of Active Grille Wire Harness Module

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.42 Left Battery Water Heater Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Wiring harness

2. Left thermal

KL15 valid, 0x18032779x lost and the maximum

management unit

WPTC1

temperature of the battery is greater than or equal to 97

P100852

(battery left water

Communication failure

degrees ferenhieght , last for 10s

heater)

3.VDC

2.Circuit Diagram

Smart Junction

Battery

Box - Chassis

Right thermal

Left thermal

management

unit 1

C4-7

C88-5

C89-5

WPTC-KL30+AGS O407

VDC-2

supply KL30 O407a

supply KL30 O407b

WPTC Power

Battery

C94-7

C94-18

C94-75

IIBS/AGSLIN cable E251

AGS-KL30 O407

I7_C_B

Ground Z56

I7_B_C

Shutter LIN E251

AGS-KL30 O407a

Active Grille

G22

G06

I_B_BU

Battery liquid level alarm signal E126

Motor liquid level alarm signal E143

I_BU_B

Ground connection Z56

AGS-KL30 O407a

AGS-LIN E251c

Ground Z56

Ground Z01

BU05-1

BU05-2

BU05-3

C41-1

C41-2

C40-2

C40-1

Coolant level

Active Grille Shutter

sensor

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the power and grounding harness of the left thermal management unit (battery left water heater).

Step 4:Check the PCAN3 bus communication harness. Refer to Inspection Of PCAN3 BusNetwork Integrity

Step 5:Rewrite the configuration code, reload the software, and upgrade the left thermal management unit (battery left water

heater).

Step 6:Replace the left thermal management unit (battery left water heater). Refer to Replacement Of Thermal Management

Unit (Left)

Step 7:VDC rewrites the configuration code, software reloads, and upgrades.

Step 8:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 9:Clear and confirm DTC.

7.2.4.43 Fault In The Right Water Heater Of The Battery

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Wiring harness

2. Right thermal

KL15 valid, 0x18032760x lost and the maximum

management unit

WPTC2

temperature of the battery is greater than or equal to 97

P100952

(battery right

Communication failure

degrees ferenhieght , last for 10s

water heater)

3.VDC

2.Circuit Diagram

Smart Junction

Battery

Box - Chassis

Right thermal

Left thermal

management

unit 1

C4-7

C88-5

C89-5

WPTC-KL30+AGS O407

VDC-2

supply KL30 O407a

supply KL30 O407b

WPTC Power

Battery

C94-7

C94-18

C94-75

IIBS/AGSLIN cable E251

AGS-KL30 O407

I7_C_B

Ground Z56

I7_B_C

Shutter LIN E251

AGS-KL30 O407a

Active Grille

G22

G06

I_B_BU

Battery liquid level alarm signal E126

Motor liquid level alarm signal E143

I_BU_B

Ground connection Z56

AGS-KL30 O407a

AGS-LIN E251c

Ground Z56

Ground Z01

BU05-1

BU05-2

BU05-3

C41-1

C41-2

C40-2

C40-1

Coolant level

Active Grille Shutter

sensor

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the power and grounding harness of the right thermal management unit (battery right water heater).

Step 4:Check the PCAN3 bus communication harness. Refer to Inspection Of PCAN3 BusNetwork Integrity

Step 5:Rewrite the configuration code, reload the software, and upgrade the right thermal management unit (battery right

water heater).

Step 6:Replace the right thermal management unit (battery right water heater).

Step 7:VDC rewrites the configuration code, software reloads, and upgrades.

Step 8:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 9:Clear and confirm DTC.

7.2.4.44 Insulation Failure

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Insulation fault (A gun)

QCM_InsulationFaultA

P10CF40

Insulation fault (B gun)

QCM_InsulationFaultB

P10DD40

1.Wiring harness

Insulation value≤500kΩ(22s)，Power-off clear

P109C30

Insulation fault LvC

2. High voltage

Insulation value≤1000kΩ(66s)，≥1200kΩ for 1s,

components

P109D30

Insulation fault LvB

automatically cleared

3.VDC

Insulation value≤5000kΩ(110s)，≥5200kΩ for 1s,

P109E30

Insulation fault LvA

automatically cleared

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the insulation resistance of high-voltage components.

Step 4:VDC rewrites the configuration code, software reloads, and upgrades.

Step 5:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 6:Clear and confirm DTC.

7.2.4.45 Air Compressor Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

The rate at which the

When the air compressor starts working, the pressure

working pressure of

rise rate within a certain time (tentatively 30s) is less

P10AC40

1.Wiring harness

the air pump rises is

than the specified value (tentatively 2Bar).

2. Air compressor

slow.

3.VDC

KL15 ON,After the vehicle is on the high voltage, the

NormRdy_

P10C140

brakes are stepped on, Brake air pressure＜0.7Mpa

AirPChkFailr_St

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the high-pressure circuit harness of the air compressor.

Step 4:Replace the air compressor. Refer to Replacement Of Air Compressor Assembly

Step 5:VDC rewrites the configuration code, software reloads, and upgrades.

Step 6:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 7:Clear and confirm DTC.

7.2.4.46 ESCL Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Wiring harness

KL15 ON,After the vehicle is on the high voltage, the

NormRdy_Escl_

2.ESCL

P10C340

brakes are stepped on, ESCL is unlocked

ChkFailr_St

3.VDC

2.Circuit Diagram

CAN resistance

BDCU-5

-120ΩC

B61-13

B61-27

IP20-2

IP20-1

ESCL-BCAN5-H BH05

ESCL-BCAN5-L BL05

I3_B_IP

Smart Junction

I3_IP_B

Box - Body

Box - Chassis

B09-16

Battery

ESCL-BCAN5-H BH05

ESCL-BCAN5-L BL05

supply B+ P316

ESCL Power

B12-1

B01-1

Total body power

supply B+ L22

I3_B_IP

I3_IP_B

ESCL-BCAN5-H BH05

ESCL-BCAN5-L BL05

Power B+ P316

IP19-3

IP19-4

IP19-1

ESCL

IP19-6

Ground

Z14e

Ground

Z14

G16

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the ESCL power supply and grounding harness.

Step 4:ESCL rewrites the configuration code, reloads the software, and upgrades.

Step 5:Replace ESCL. Refer to Replacement Of Steering Column Assembly

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.47 IBS Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Wiring harness

2.Intelligent

The IBS reports fault level and fault code

P10E863

IBS failure

battery sensor

IBS

3.VDC

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the IBS power supply and grounding harness of the battery.

Step 4:Check the LIN communication harness between the intelligent battery sensor IBS and VDC.

Step 5:Replace the intelligent battery sensor IBS. Refer to Replacement Of Smart Battery Sensors

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.48 Thermal Management System Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Charging and heating: When the battery temperature is

Abnormal heating

less than 5℃: After 30 minutes, the lowest temperature

during low-

of the cell rises by less than 5℃, and the temperature

P10C740

temperature charging

rise of the incoming water is also less than 5℃. In this

case, report a battery thermal management failure.

Charging cooling: When the battery temperature is ≥

Abnormal cooling

40℃, and the water temperature after 30 minutes is >

during high-

P10C840

35℃(to be determined), report battery thermal

1.Wiring harness

temperature charging

management failure.

2.Cooling unit

3.VDC

High-temperature discharge: If the battery temperature

is ≥40℃, and the temperature drop of the cell's highest

Abnormal cooling

temperature after 30 minutes is less than 5℃, and the

during high-

P10CA40

temperature drop of the water ingress temperature is

temperature discharge

also less than 5℃, then report a battery thermal

management failure.

thermal management

The thermal management system reports fault

P10E462

system failure

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Move the vehicle to a normal temperature environment and let it sit for a while.

Step 4:Check if the coolant is insufficient.

– Yes:

Add coolant to the standard mark.

Next step

– No:

Step 5:Check if there are any thermal runaway related fault codes on the vehicle?

Eliminate fault codes related to thermal runaway. Refer to Battery Thermal Runaway Fault

– Yes:

Next step

– No:

Step 6:Check the motor coolant level sensor. Refer to Motor Coolant Level Sensor Fault

Step 7:Check the battery coolant level sensor. Refer to Battery Coolant Level Sensor Fault

Step 8:Check the motor fan. Refer to Motor Fan Fault

Step 9:Check the motor water pump. Refer to Motor Water Pump Fault

Step 10:Check the left battery fan. Refer to Left Battery Fan Malfunction

Step 11:Check the right battery fan. Refer to Right Battery Fan Malfunction

Step 12:Check left battery water pump. Refer to Left Battery Water Pump Malfunction

Step 13:Check right battery water pump. Refer to Right Battery Water Pump Malfunction

Step 14:Check the left water heater of the battery. Refer to Left Battery Water Heater Fault

Step 15:Check the right water heater of the battery. Refer to Fault In The Right Water Heater Of The Battery

Step 16:VDC rewrite configuration code, software reload, upgrade.

Step 17:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 18:Clear and confirm DTC.

7.2.4.49 CC2 Signal Failure

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Wire harness

2.the left fast

charging

Charging wake-up

interface、the

No CC signal but there is an A+ signal for 10s

P103E10

exception

right quick

charging

interface

3.VDC

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Check the CC2 signal harness between the left fast charging interface、the fast charging interface on the right and

VDC.

Step 3:Replace the left fast charging interface、the right quick charging interface。Refer to Replacement Of DC Charging

Socket Assembly IReplacement Of DC Charging Socket Assembly II

Step 4:VDC rewrites the configuration code, software reloads, and upgrades.

Step 5:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

7.2.4.50 Battery Fan Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Battery cooling fan failure:

When the VDC battery fan PWM is activated:

①VDC detects a fault in the battery fan feedback, or

does not receive the fan current feedback from the SJB.

The compressors and fans on both sides of the battery

thermal management are prohibited from operating,

reporting a battery fan failure. When the battery thermal

1.Wiring harness

management is in non-cooling mode, the failure level is

2. Left thermal

level one; when it is in cooling mode, the failure level is

management unit

level two.

Battery fan failure

P103410

(left battery fan

②VDC receives a feedback from the SJB indicating

1)、Right thermal

that one battery fan current is less than 0.5A. VDC limits

management unit

the maximum rotational speed of the compressors on

(right battery fan

both sides to 4000 rpm, reporting a battery fan failure.

The failure level is level one.

3.VDC

③VDC receives a feedback from the SJB indicating

that the current of two battery fans on one side is less

than 0.5A. VDC prohibits the operation of the

compressors on both sides, reporting a battery fan

failure. The failure level is level two.

Power on, The power supply is valid, the fan is enabled,

Battery fan 2 failure

P103510

and the hard cable fault signal is valid for 10 seconds

2.Circuit Diagram

Refer to VDC System

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the power supply and grounding harness of the left thermal management unit (left battery fan 1), left thermal

management unit (left battery fan 2),the right thermal management unit (right battery fan 1), right thermal management unit

(right battery fan 2).

Step 4:Check the wiring harness between the left thermal management unit (left battery fan 1), left thermal management unit

(left battery fan 2),the right thermal management unit (right battery fan 1), the right thermal management unit (right battery fan

2) and VDC.

Step 5:Enter the VDC-action test of the diagnostic instrument interface and perform the "Battery fan 1, open/close","Battery

fan 2, open/close" action test. Check the left battery fan operates according to the diagnostic tool's instructions.

Next step

– Yes:

Replace the left thermal management unit (left battery fan 1) and the left thermal management unit (left

battery fan 2),the right thermal management unit (right battery fan 1) and right thermal management unit (right

– No:

battery fan 2). Refer to Replacement Of Thermal Management Unit (Left)

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.51 Three Valve(Left) Failure

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Battery thermal management three-way valve failure:

①If the VDC does not receive the feedback message

from the three-way valve, the compressor, fan, and

WPTC are prohibited from operating. A battery three-

way valve failure is reported. When the battery thermal

management is in non-cooling mode, the failure level is

level one; when it is in cooling or heating mode, the

failure level is level two.

②When the three-way valve has a stuck rotation

failure, both sides send 0x32. If there is no feedback

failure, the maximum rotational speed of the

compressors on both sides is limited to 4000 rpm, and

1. Wiring harness

the maximum power of the WPTC is 10 kW. A three-

Battery Three Valve

2.Three Valve

P103510

way valve failure is reported, with a failure level of level

(Left) failure

(Left)

one. If there is still a fault feedback, the compressor,

3.VDC

fan, and WPTC are prohibited from operating, and a

battery three-way valve failure is reported. When the

battery thermal management is in non-cooling mode,

the failure level is level one; when it is in cooling or

heating mode, the failure level is level two.

③When the three-way valve reports other faults except

for stuck rotation, the compressor, fan, and WPTC are

prohibited from operating. A battery three-way valve

failure is reported. When the battery thermal

management is in non-cooling mode, the failure level is

level one; when it is in cooling or heating mode, the

failure level is level two.

2.Circuit Diagram

Refer to VDC System

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Inspect the power supply and ground wiring harness for the Three Valve(Left).

Step 4:Inspect the wiring harness between the Three Valve(Left) and the VDC.

Step 5:Enter the diagnostic tool interface VDC-Function Test and execute the “Three Valve(Left), Open/Close” function test.

Verify whether the Three Valve(Left) operates according to the diagnostic tool's commands.

Next step

– Yes:

ReplaceThree Valve(Left).

– No:

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.52 Three Valve(Right) Failure

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

P103810

Battery thermal management three-way valve failure:

①If the VDC does not receive the feedback message

from the three-way valve, the compressor, fan, and

WPTC are prohibited from operating. A battery three-

way valve failure is reported. When the battery thermal

management is in non-cooling mode, the failure level is

level one; when it is in cooling or heating mode, the

failure level is level two.

②When the three-way valve has a stuck rotation

failure, both sides send 0x32. If there is no feedback

failure, the maximum rotational speed of the

compressors on both sides is limited to 4000 rpm, and

1. Wiring harness

the maximum power of the WPTC is 10 kW. A three-

Battery Three Valve

2.Three Valve

way valve failure is reported, with a failure level of level

(Right) failure

(Right)

one. If there is still a fault feedback, the compressor,

3.VDC

fan, and WPTC are prohibited from operating, and a

battery three-way valve failure is reported. When the

battery thermal management is in non-cooling mode,

the failure level is level one; when it is in cooling or

heating mode, the failure level is level two.

③When the three-way valve reports other faults except

for stuck rotation, the compressor, fan, and WPTC are

prohibited from operating. A battery three-way valve

failure is reported. When the battery thermal

management is in non-cooling mode, the failure level is

level one; when it is in cooling or heating mode, the

failure level is level two.

2.Circuit Diagram

Refer to VDC System

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Inspect the power supply and ground wiring harness for the Three Valve(Right).

Step 4:Inspect the wiring harness between the Three Valve(Right) and the VDC.

Step 5:Enter the diagnostic tool interface VDC-Function Test and execute the “Three Valve(Right), Open/Close” function test.

Verify whether the Three Valve(Right) operates according to the diagnostic tool's commands.

Next step

– Yes:

ReplaceThree Valve(Right).

– No:

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.53 Battery Water Pump Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Battery cooling pump failure:

When the VDC battery pump PWM is activated:

VDC detects a battery cooling pump failure (pump

1.Wiring harness

feedback failure or pump operating current < 0.5A, or

2. Left thermal

VDC does not receive the pump current feedback from

management unit

the SJB)

(left battery water

Battery pump failure

P103710

The pump PWM outputs normally, the battery thermal

pump),Right

management side compressors, fans, and WPTC are

thermal

prohibited from working, a battery pump failure is

management unit

reported, when the battery thermal management is in

(right battery

non-cooling or heating mode, the fault level is level one,

water pump)

and when it is in cooling or heating mode, the fault level

3.VDC

is level two.

Power on, The power supply is valid, the fan is enabled,

Battery pump 2 failure

P103810

and the hard cable fault signal is valid for 10 seconds

2.Circuit Diagram

Refer to VDC System

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the power supply and grounding harness of the left thermal management unit (left battery water pump),the right

thermal management unit (right battery water pump).

Step 4:Check the wiring harness between the left thermal management unit (left battery water pump),the right thermal

management unit (right battery water pump) and VDC.

Step 5:Enter the diagnostic instrument interface VDC-action test and perform the "battery water pump 1, open/close","battery

water pump 2, open/close" action test. Check the left battery water pump operates according to the diagnostic tool

instructions.

Nex step

– Yes:

Replace the left thermal management unit (left battery water pump), the right thermal management unit (right

– No:

battery water pump). Refer to Replacement Of Thermal Management Unit (Left)

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.54 Fast Charging Interface Temperature Detection Signal Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Power on, The AD value is greater than or equal to X for

FCT Sensor 1, open

10s PwrOn，AD值≥X(10s)

P102010

circuit

Power on, The AD value is less than or equal to 110 for

FCT Sensor 1, short

10s PwrOn，AD值≤M(10s)

P102110

circuit

Power on, The AD value is greater than or equal to X for

FCT Sensor 2, open

10s PwrOn，AD值≥X(10s)

P102210

circuit

Power on, The AD value is less than or equal to 110 for

FCT Sensor 2, short

1. Fast charging

10s PwrOn，AD值≤M(10s)

P102310

circuit

interface on the

left，Fast

Power on, The AD value is greater than or equal to X for

charging

FCT Sensor 3, open

10s PwrOn，AD值≥X(10s)

P102410

interface on the

circuit

right side

Power on, The AD value is less than or equal to 110 for

2. Wiring harness

FCT Sensor 3, short

10s PwrOn，AD值≤M(10s)

P102510

3.VDC

circuit

Power on, The AD value is greater than or equal to X for

FCT Sensor 4, open

10s PwrOn，AD值≥X(10s)

P102610

circuit

Power on, The AD value is less than or equal to 110 for

FCT Sensor 4, short

10s PwrOn，AD值≤M(10s)

P102710

circuit

Fast charge

temperature check 1

TA_NTC1≥100℃(2s)，≤95℃clear(2s)

P108830

Overtemperature LvA

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Fast charge

temperature check 2

TA_NTC2≥100℃(2s)，≤95℃clear(2s)

P108930

Overtemperature LvA

Fast charge

temperature check 3

TA_NTC3≥100℃(2s)，≤95℃clear(2s)

P108A30

Overtemperature LvA

Fast charge

temperature check 4

TA_NTC4≥100℃(2s)，≤95℃clear(2s)

P108B30

Overtemperature LvA

Fast charge

temperature check 1

TA_NTC1≥120℃(1s)，Power-off clear

P108C30

Overtemperature LvB

Fast charge

temperature check 2

TA_NTC1≥120℃(1s)，Power-off clear

P108D30

Overtemperature LvB

Fast charge

temperature check 3

TA_NTC1≥120℃(1s)，Power-off clear

P108E30

Overtemperature LvB

Fast charge

temperature check 4

TA_NTC1≥120℃(1s)，Power-off clear

P108F30

Overtemperature LvB

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Move the vehicle to a normal temperature environment and let it sit for a while.

Step 4:Check whether the vehicle has any fault codes related to the thermal management system?

Prioritize troubleshooting related to thermal management systems.

– Yes:

Next step

– No:

Step 5:Check the temperature control signal harness between the left fast charging interface and VDC.

Step 6:Replace the left fast charging interface. Refer to Replacement Of DC Charging Socket Assembly I

Replace the right quick charging interface. Refer to Replacement Of DC Charging Socket Assembly II

Step 7:VDC rewrites the configuration code, software reloads, and upgrades.

Step 8:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 9:Clear and confirm DTC.

7.2.4.55 VDC Reports EBS Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Powrr on,The braking signal provided by the chassis

Brake signal

feedback is inconsistent with the braking signal

P103210

verification does not

collected by VDC for 10s.

match

1. Electric drive

Brake pressure sensor

PwrOn, Snsr1: AD value ≥3390 (5s); ≤3350 auto clear

mid-axle vehicle

P10B310

1 is faulty

(2s) AD value ≤670 (5s); ≥680 auto clear (2s)

low-voltage

interface

Brake pressure sensor

PwrOn, Snsr2: AD value ≥3390 (5s); ≤3350 auto clear

P10B410

2.VDC

2 is faulty

(2s) AD value ≤690 (5s); ≥700 auto clear (2s)

Brake pressure

P10AB40

monitoring

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check there is a EBS related fault code?

Prioritize troubleshooting related to EBS.

– Yes:

Next step

– No:

Step 4:Rewrite the configuration code, reload the software, and upgrade the low-voltage interface of the electric drive mid-axle

vehicle.

Step 5:Replace the low-voltage interface of the electric drive mid axle vehicle. Refer to Replacement Of Integrated axle -

Medium axle

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.56 VDC IBS TCU Communication Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Wiring harness

IBS communication

Power on, IBS communication failure for 10s

P103F10

2.IBS

failure

3.VDC

2. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC confirmation

Step 2:Routine inspection. Refer to Routine Inspection

Step 3:Check there is a IBS related fault code?

Prioritize troubleshooting related to IBS.

– Yes:

Next step

– No:

Step 4:Check the PCAN4 bus communication harness. Refer to Inspection Of PCAN4 Bus Network Integrity

Step 5:Rewrite the configuration code, reload the software, and upgrade the low-voltage interface of the electric drive mid-axle

vehicle.

Step 6:Replace the low-voltage interface of the electric drive mid axle vehicle. Refer to Replacement Of Integrated axle -

Medium axle

Step 7:VDC rewrites the configuration code, software reloads, and upgrades.

Step 8:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 9:Clear and confirm DTC.

7.2.4.57 Battery Compressor Fault

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

After the compressor operates for 2 minutes, the

1.Wiring harness

saturation temperature is ≤2℃and the superheat is ≤

2. Left thermal

2℃. The maximum rotational speed of the compressor

management unit

is 6000 rpm. If the superheat does not increase within

(battery left

20 seconds, the compressor will reduce its rotational

Compressor 1_TSH_

compressor),

P10B510

speed at a rate of -400 rpm per 20 seconds. The

Tsat_flt

Right thermal

maximum rotational speed will be 1000 rpm. If the

management unit

superheat is ≤0℃, the compressor will stop. If the

(battery right

superheat is ≥4℃, the compressor will resume

compressor)

operation or be released from the rotational speed limit.

3.VDC

Description

DTC Trigger Conditions

Faulty Part

DTC Code

After the compressor operates for 2 minutes, the

saturation temperature is ≤2℃and the superheat is ≤

2℃. The maximum rotational speed of the compressor

is 6000 rpm. If the superheat does not increase within

20 seconds, the compressor will reduce its rotational

Compressor 2_TSH_

P10C910

speed at a rate of -400 rpm per 20 seconds. The

Tsat_flt

maximum rotational speed will be 1000 rpm. If the

superheat is ≤0℃, the compressor will stop. If the

superheat is ≥4℃, the compressor will resume

operation or be released from the rotational speed limit.

KL15 valid, 0x1802277Ax lost and the minimum

BLR1 Communication

temperature of the battery is less than or equal to 5

failure

P100A52

degrees Celsius , last for 10s

KL15 valid, 0x1802277Bx lost and the minimum

BLR2 Communication

temperature of the battery is less than or equal to 5

failure

P100B52

degrees Celsius , last for 10s

2.Circuit Diagram

Air conditioning

Controller A

Smart Junction Box - Body

Power KL30 P204a

B42-40

Air conditioning

Controller B

Power KL30 P204e

B43-1

Air conditioning

B08-4

controller KL30 P204

Front air

conditioner SOV

Power source P204a

C73-2

I3_B_C

I3_C_B

SOV+P204

Rear air

conditioning SOV

Power source P204b

C67-2

Air conditioning

compressor

Power KL30 P205c

C68-1

Right thermal

Compressor power

management unit 1

supply KL30 P205b

C89-4

Compressor power

Three-way valve power

Compressor power

supply P205c

supply KL30 P205

I3_B_C

I3_C_B

supply KL30 P205

B08-5

C89-26

Left thermal

management unit 1

Compressor power

supply KL30 P205a

C88-4

Three-way valve power

supply KL30 P205

C88-26

Right side air

conditioner

PTC controller KL30 P203b

B54-5

Left side air

conditioner

PTC controller

PTC controller KL30 P203a

B08-3

KL30 P203

B52-5

Sleeper air

conditioner

PTC controller KL30 P203c

B81-5

3. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the power and grounding harness of the left thermal management unit (battery left compressor),the right thermal

management unit (battery right compressor)..

Step 4:Check the PCAN3 bus communication harness. Refer to Inspection Of PCAN3 Bus Network Integrity

Step 5:Rewrite the configuration code, reload the software, and upgrade the left thermal management unit (battery left

compressor),the right thermal management unit (battery right compressor).。

Step 6:Replace the left thermal management unit (battery left compressor),the right thermal management unit (battery right

compressor). Refer to Replacement Of Thermal Management Unit (Left)

Step 7:VDC rewrites the configuration code, software reloads, and upgrades.

Step 8:Replace VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 9:Clear and confirm DTC.

7.2.4.58 Overheating During Charging

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

QCM_

Connector overtemperature (A gun)

P10D040

OutputConOverTptFa-

ultA

1.Charging

BMS component, output connector overtemperature (A

QCM_

P10D140

Connector (A

gun)

BMSOverTptFaultA

gun)

Charging connector overtemperature (A gun)

QCM_ChrConFaultA

P10D240

2.Charging

QCM_

Connector (B

Connector overtemperature (B gun)

P10DE40

OutputConOverTptFa-

gun)

ultB

3.VDC

BMS component, output connector overtemperature (B

QCM_

P10DF40

gun)

BMSOverTptFaultB

Charging connector overtemperature (B gun)

QCM_ChrConFaultB

P100C40

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Are there any fault codes related to fast charging port temperature detection?

Next step

– Yes:

Prioritize troubleshooting related to fast charging port temperature detection

– No:

Step 4:Is the charging station functioning properly?

Next step

– Yes:

Replace the charging station.

– No:

Step 5:Is the thermal management system functioning properly?

Next step

– Yes:

Inspect and maintain the thermal management system.

– No:

Step 6:VDC rewrites the configuration code, software reloads, and upgrades.

Step 7:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 8:Clear and confirm DTC.

7.2.4.59 Charging Status Abnormal

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

P10D540

QCM_

Detection point 2 voltage detection fault (A gun)

DetectionPoint2FaultA

P10D640

QCM_OtherFaultA

Other faults (A gun)

P10D740

QCM_

Excessive current (Gun A)

1.Charging

BatCurOverFaultA

Connector (A

P10D840

QCM_

Abnormal voltage (Gun A)

gun)

BatVAbnorFaultA

2.Charging

P100F40

QCM_

Detection point 2 voltage detection fault (B gun)

Connector (B

DetectionPoint2FaultB

gun)

P10F040

QCM_OtherFaultB

Other faults (B gun)

3.VDC

P10F140

QCM_

Excessive current (B gun)

BatCurOverFaultB

P10F240

QCM_

Abnormal voltage (B gun)

BatVAbnorFaultB

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Are there any fault codes related to the charging port or CMU?

Next step

– Yes:

Prioritize troubleshooting related to the charging port or CMU.

– No:

Step 4:Is the charging station functioning properly?

Next step

– Yes:

Replace the charging station.

– No:

Step 5:VDC rewrites the configuration code, software reloads, and upgrades.

Step 6:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 7:Clear and confirm DTC.

7.2.4.60 VDC High-Voltage Interlock Failure

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. High-voltage

wiring harness

Hard wire high voltage interlock detection difference

VDC detects high-

2. High-voltage

value is greater than or equal to 15 for 1s, less than 10

P10A930

voltage interlock failure

interlock wiring

for1s，automatically cleared

harness

3.VDC

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Inspect the high-voltage wiring harnesses for all high-voltage components.

Step 4:Inspect the high-voltage interlock wiring harnesses for all high-voltage components.

Step 5:VDC rewrites the configuration code, software reloads, and upgrades.

Step 6:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 7:Clear and confirm DTC.

7.2.4.61 Abnormal Air Leakage In The Braking System

1.DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

FAirLoss_Flt_flg

P10C440

An abnormal air leak was detected in the front axle.

Front axle

Rear axle

RAirLoss_Flt_flg

Abnormal air leakage was detected in the rear axle.

P10C540

2. Diagnostic Steps

Step 1:DTC Confirmation. Refer to DTC Confirmation

Step 2:Routine Inspection. Refer to Routine Inspection

Step 3:Check the brake system for air leaks.

Inspect the front axle and rear axle.

– Yes:

Next step

– No:

Step 4:Replace the VDC. Refer to Replacement Of Vehicle Domain Controller Assembly

Step 5:Clear and confirm DTC.

7.2.4.62 EVCC Power Fault

1.Circuit Diagram

Smart Junction

Box - Chassis

Battery

CCS1

C121-5

C121-1 C121-9 C121-8 C121-6

C121-7

C109-5

C109-1

C109-9

C109-8

C109-6

C109-7

C5-H

communication

Lock + M53b

Lock - M54b

OUT M56b

signal M52b

Electronic

PP1 M51b

IN M55b

CP-PLC

B+ G5Ha

communication

CP-PLC N52

Lock + M53

Lock + N53

Lock - M54

Lock - N54

B+ G5Hc

Electronic

signal M52

OUT M56

OUT N56

PP1 M51

B+ G5Hb

PP1 N51

CP-PLC

IN M55

IN N55

C96-10 C96-15 C96-16 C96-5

C96-6

C120-15 C120-16

C120-5

C120-6

C96-1

C96-9

C120-1

C120-9

C120-10

EVCC-L

EVCC-R

C96-7

C96-8

C120-7

C120-8

C96-13

C96-3

C96-11

C96-20

C120-13

C120-3

C120-11 C120-20

P1CC2 E151

P2CC2 E128

PCAN5-H PH05

A+ E133

PCAN5-L PL05

A+ E138

PCAN1-H PH01

PCAN1-L PL01

C94-33

C94-81

C94-76

C94-78

VDC-2

PCAN5

PCAN1

PE(GND) Z50x

PE(GND) Z50

GND- Z50y

GND- Z50

G09

2.Diagnostic Steps

Step 1:Routine Inspection. Refer to Routine Inspection

Step 2:Check if there are any other module power fault codes besides the EVCC-L,EVCC-R?

Check the main battery. Refer to Inspection Of The Main Battery

– Yes:

Check the low-voltage charging system. Refer to DCDC1 Low-voltage Charging System Fault

Next step

– No:

Step 3:Check the power and grounding harness of the EVCC-L,EVCC-R.

Step 4:Rewrite the configuration code, reload the software, and upgrade the EVCC-L,EVCC-R.

Step 5:Replace the EVCC-L,EVCC-R. Refer to Replacement Of MCS Charging Socket Assembly

7.2.4.63 EVCC Communication Fault

1.Circuit Diagram

Smart Junction

Box - Chassis

Battery

CCS1

C121-5

C121-1 C121-9 C121-8 C121-6

C121-7

C109-5

C109-1

C109-9

C109-8

C109-6

C109-7

C5-H

communication

Lock + M53b

Lock - M54b

OUT M56b

signal M52b

Electronic

PP1 M51b

IN M55b

CP-PLC

B+ G5Ha

communication

CP-PLC N52

Lock + M53

Lock + N53

Lock - M54

Lock - N54

B+ G5Hc

Electronic

signal M52

OUT M56

OUT N56

PP1 M51

B+ G5Hb

PP1 N51

CP-PLC

IN M55

IN N55

C96-10 C96-15 C96-16 C96-5

C96-6

C120-15 C120-16

C120-5

C120-6

C96-1

C96-9

C120-1

C120-9

C120-10

EVCC-L

EVCC-R

C96-7

C96-8

C120-7

C120-8

C96-13

C96-3

C96-11

C96-20

C120-13

C120-3

C120-11 C120-20

P1CC2 E151

P2CC2 E128

PCAN5-H PH05

A+ E133

PCAN5-L PL05

A+ E138

PCAN1-H PH01

PCAN1-L PL01

C94-33

C94-81

C94-76

C94-78

VDC-2

PCAN5

PCAN1

PE(GND) Z50x

PE(GND) Z50

GND- Z50y

GND- Z50

G09

2.Circuit Diagram

Step 1:Routine Inspection. Refer to Routine Inspection

Step 2:Check the PCAN1 bus communication harness. Refer to Inspection Of PCAN1 Bus Network Integrity

Step 3:Rewrite the configuration code, reload the software, and upgrade the EVCC-L,EVCC-R.

Step 4:Replace the EVCC-L,EVCC-R. Refer to Replacement Of MCS Charging Socket Assembly

7.2.4.64 EVCC A+ Signal Fault

1.Circuit Diagram

Smart Junction

Box - Chassis

Battery

CCS1

C121-5

C121-1 C121-9 C121-8 C121-6

C121-7

C109-5

C109-1

C109-9

C109-8

C109-6

C109-7

C5-H

communication

Lock + M53b

Lock - M54b

OUT M56b

signal M52b

Electronic

PP1 M51b

IN M55b

CP-PLC

B+ G5Ha

communication

CP-PLC N52

Lock + M53

Lock + N53

Lock - M54

Lock - N54

B+ G5Hc

Electronic

signal M52

OUT M56

OUT N56

PP1 M51

B+ G5Hb

PP1 N51

CP-PLC

IN M55

IN N55

C96-10 C96-15 C96-16 C96-5

C96-6

C120-15 C120-16

C120-5

C120-6

C96-1

C96-9

C120-1

C120-9

C120-10

EVCC-L

EVCC-R

C96-7

C96-8

C120-7

C120-8

C96-13

C96-3

C96-11

C96-20

C120-13

C120-3

C120-11 C120-20

P1CC2 E151

P2CC2 E128

PCAN5-H PH05

A+ E133

PCAN5-L PL05

A+ E138

PCAN1-H PH01

PCAN1-L PL01

C94-33

C94-81

C94-76

C94-78

VDC-2

PCAN5

PCAN1

PE(GND) Z50x

PE(GND) Z50

GND- Z50y

GND- Z50

G09

2.Diagnostic Steps

Step 1:Routine Inspection. Refer to Routine Inspection

Step 2:Check the A+ wake-up signal harness between the EVCC-L,EVCC-R and the VDC.

Step 3:Rewrite the configuration code, reload the software, and upgrade the EVCC-L,EVCC-R.

Step 4:Replace the EVCC-L,EVCC-R. Refer to Replacement Of MCS Charging Socket Assembly

7.2.4.65 EVCC CP Signal Fault

1.Circuit Diagram

CCS1 Fast charging port

C109-5

C109-6

C109-7

C109-8

C109-9

C109-1

Electronic lock feedback OUT M56

Electronic lock feedback IN M55

Electronic lock 1+ M532

Electronic lock 1- M542

PP1 E128

CP1 M52

Electronic lock 1 feedback IN M55

Electronic lock feedback IN M55

feedback OUT M56

CP-PLC communi-

Electronic lock

feedback OUT M56

cation signal M52

CP-PLC communi-

cation signal M52

Electronic lock

C100-2

C96-16

C96-15

C100-24

C100-23

C111-1

C111-2

C96-10

C94-81

CCS1 charging connection

MCS fast charging port

EVCC controller

VDC-2

C96-5

C96-6

C100-21

C100-22

Electronic lock + M531

Electronic lock - M541

Electronic lock + M53

Electronic lock - M54

C112-1

C112-2

C110-1

C110-2

Fast charge connector

MCS charging connection

2.Diagnostic Steps

Step 1:Routine Inspection. Refer to Routine Inspection

Step 2:Check the CP signal harness between the EVCC-L,EVCC-R and the VDC.

Step 3:Rewrite the configuration code, reload the software, and upgrade the EVCC-L,EVCC-R.

Step 4:Replace the EVCC-L,EVCC-R. Refer to Replacement Of MCS Charging Socket Assembly

7.2.4.66 PP Signal Fault

1.Circuit Diagram

Smart Junction

Box - Chassis

Battery

CCS1

C121-5

C121-1 C121-9 C121-8 C121-6

C121-7

C109-5

C109-1

C109-9

C109-8

C109-6

C109-7

C5-H

communication

Lock + M53b

Lock - M54b

OUT M56b

signal M52b

Electronic

PP1 M51b

IN M55b

CP-PLC

B+ G5Ha

communication

CP-PLC N52

Lock + M53

Lock + N53

Lock - M54

Lock - N54

B+ G5Hc

Electronic

signal M52

OUT M56

OUT N56

PP1 M51

B+ G5Hb

PP1 N51

CP-PLC

IN M55

IN N55

C96-10 C96-15 C96-16 C96-5

C96-6

C120-15 C120-16

C120-5

C120-6

C96-1

C96-9

C120-1

C120-9

C120-10

EVCC-L

EVCC-R

C96-7

C96-8

C120-7

C120-8

C96-13

C96-3

C96-11

C96-20

C120-13

C120-3

C120-11 C120-20

P1CC2 E151

P2CC2 E128

PCAN5-H PH05

A+ E133

PCAN5-L PL05

A+ E138

PCAN1-H PH01

PCAN1-L PL01

C94-33

C94-81

C94-76

C94-78

VDC-2

PCAN5

PCAN1

PE(GND) Z50x

PE(GND) Z50

GND- Z50y

GND- Z50

G09

2.Diagnostic Steps

Step 1:Routine Inspection. Refer to Routine Inspection

Step 2:Check the A+ wake-up signal harness between the EVCC-L,EVCC-R and the VDC.

Step 3:Rewrite the configuration code, reload the software, and upgrade the EVCC-L,EVCC-R.

Step 4:Replace the EVCC-L,EVCC-R. Refer to Replacement Of MCS Charging Socket Assembly

7.2.4.67 Inspection Of PCAN1 Bus Network Integrity

Step 1

Check the PCAN1 bus terminal resistance.

Perform vehicle power on operation.

Do not disconnect the wiring harness connector. Use a

multimeter to measure each terminal according to the

following table:

Measuring Terminals

Standard Value

PCAN1(H) and PCAN1

Resistance:55 - 63 Ω

(L)

Confirm the measured values meet the standards.

Up to step 6.

Yes

Step 2

Check the PCAN1 bus voltage.

Perform vehicle power on operation.

Do not disconnect the wiring harness connector. Use a

multimeter to measure each terminal according to the

following table:

Measuring Terminals

Standard Value

PCAN1 (H) and vehicle

Voltage:2.5 - 3.5 V

grounding

PCAN1 (L) and vehicle

Voltage:1.5 - 2.5 V

grounding

Confirm the measured values meet the standards.

Up to step 6.

Yes

Step 3

Check the bus voltage of each module.

Perform vehicle power on operation.

Measure the bus voltage of each module in sequence

(do not disconnect the harness connectors).

Measuring Terminals

Standard Value

PCAN1 (H) and vehicle

Voltage:2.5 - 3.5 V

grounding

PCAN1 (L) and vehicle

Voltage:1.5 - 2.5 V

grounding

Confirm the bus voltage of each module meets the

standard.

Up to step 6.

Yes

Step 4

Check the power grounding of the communication loss module.

Check the power grounding of the communication loss

module.

Confirm if the module power grounding is normal.

Repair or replace the wiring harness.

Yes

Step 5

Replace the communication loss module.

Confirm if the system is functioning properly.

Yes

The system is functioning properly.

Step 6

Check the PCAN1 bus harness.

Perform vehicle power-off operation.

Disconnect all module harness connectors on the

PCAN1 bus.

Measure the PCAN1 bus resistance between each

module and the power domain controller in sequence to

see if it is normal.

Standard resistance:less than 1 Ω

Measure the ground resistance of PCAN1 bus is

normal.

Standard resistance:10K Ω or higher

Perform vehicle power on operation.

Measure the PCAN1 bus is short circuited to the power

supply.

Standard voltage:0 V

Confirm the measured values meet the standards.

Repair or replace PCAN1 bus.

Yes

Step 7

Disconnect the modules on the PCAN1 bus in sequence and observe the bus communication voltage/resistance.

Disconnect the modules on the PCAN1 bus in sequence and

observe the bus communication voltage/resistance returns

to normal. If it returns to normal, determine that the

disconnected module is faulty.

7.2.4.68 Inspection Of PCAN2 Bus Network Integrity

Step 1

Check the PCAN2 bus terminal resistance.

Perform vehicle power on operation.

Do not disconnect the wiring harness connector. Use a

multimeter to measure each terminal according to the

following table:

Measuring Terminals

Standard Value

PCAN2(H) and PCAN2

Resistance:55 - 63 Ω

(L)

Confirm the measured values meet the standards.

Up to step 6.

Yes

Step 2

Check the PCAN2 bus voltage.

Perform vehicle power on operation.

Do not disconnect the wiring harness connector. Use a

multimeter to measure each terminal according to the

following table:

Measuring Terminals

Standard Value

PCAN2 (H) and vehicle

Voltage:2.5 - 3.5 V

grounding

PCAN2 (L) and vehicle

Voltage:1.5 - 2.5 V

grounding

Confirm the measured values meet the standards.

Up to step 6.

Yes

Step 3

Check the bus voltage of each module.

Perform vehicle power on operation.

Measure the bus voltage of each module in sequence

(do not disconnect the harness connectors).

Measuring Terminals

Standard Value

PCAN2 (H) and vehicle

Voltage:2.5 - 3.5 V

grounding

PCAN2 (L) and vehicle

Voltage:1.5 - 2.5 V

grounding

Confirm the bus voltage of each module meets the

standard.

Up to step 6.

Yes

Step 4

Check the power grounding of the communication loss module.

Check the power grounding of the communication loss

module.

Confirm if the module power grounding is normal.

Repair or replace the wiring harness.

Yes

Step 5

Replace the communication loss module.

Confirm if the system is functioning properly.

Yes

The system is functioning properly.

Step 6

Check the PCAN2 bus harness.

Perform vehicle power-off operation.

Disconnect all module harness connectors on the

PCAN2 bus.

Measure the PCAN2 bus resistance between each

module and the power domain controller in sequence to

see if it is normal.

Standard resistance:less than 1 Ω

Measure the ground resistance of PCAN2 bus is

normal.

Standard resistance:10K Ω or higher

Perform vehicle power on operation.

Measure the PCAN2 bus is short circuited to the power

supply.

Standard voltage:0 V

Confirm the measured values meet the standards.

Repair or replace PCAN2 bus.

Yes

Step 7

Disconnect the modules on the PCAN2 bus in sequence and observe the bus communication voltage/resistance.

Disconnect the modules on the PCAN2 bus in sequence and

observe the bus communication voltage/resistance returns

to normal. If it returns to normal, determine that the

disconnected module is faulty.

7.2.4.69 Inspection Of PCAN3 Bus Network Integrity

Step 1

Check the PCAN3 bus terminal resistance.

Perform vehicle power on operation.

Do not disconnect the wiring harness connector. Use a

multimeter to measure each terminal according to the

following table:

Measuring Terminals

Standard Value

PCAN3(H) and PCAN3

Resistance:55 - 63 Ω

(L)

Confirm the measured values meet the standards.

Up to step 6.

Yes

Step 2

Check the PCAN3 bus voltage.

Perform vehicle power on operation.

Do not disconnect the wiring harness connector. Use a

multimeter to measure each terminal according to the

following table:

Measuring Terminals

Standard Value

PCAN3 (H) and vehicle

Voltage:2.5 - 3.5 V

grounding

PCAN3 (L) and vehicle

Voltage:1.5 - 2.5 V

grounding

Confirm the measured values meet the standards.

Up to step 6.

Yes

Step 3

Check the bus voltage of each module.

Perform vehicle power on operation.

Measure the bus voltage of each module in sequence

(do not disconnect the harness connectors).

Measuring Terminals

Standard Value

PCAN3 (H) and vehicle

Voltage:2.5 - 3.5 V

grounding

PCAN3 (L) and vehicle

Voltage:1.5 - 2.5 V

grounding

Confirm the bus voltage of each module meets the

standard.

Up to step 6.

Yes

Step 4

Check the power grounding of the communication loss module.

Check the power grounding of the communication loss

module.

Confirm if the module power grounding is normal.

Repair or replace the wiring harness.

Yes

Step 5

Replace the communication loss module.

Confirm if the system is functioning properly.

Yes

The system is functioning properly.

Step 6

Check the PCAN3 bus harness.

Perform vehicle power-off operation.

Disconnect all module harness connectors on the

PCAN3 bus.

Measure the PCAN3 bus resistance between each

module and the power domain controller in sequence to

see if it is normal.

Standard resistance:less than 1 Ω

Measure the ground resistance of PCAN3 bus is

normal.

Standard resistance:10K Ω or higher

Perform vehicle power on operation.

Measure the PCAN3 bus is short circuited to the power

supply.

Standard voltage:0 V

Confirm the measured values meet the standards.

Repair or replace PCAN3 bus.

Yes

Step 7

Disconnect the modules on the PCAN3 bus in sequence and observe the bus communication voltage/resistance.

Disconnect the modules on the PCAN3 bus in sequence and

observe the bus communication voltage/resistance returns

to normal. If it returns to normal, determine that the

disconnected module is faulty.

7.2.5 Dismantling and Installation

7.2.5.1 Replacement of VDC Assembly

Removal Procedures

Open the door.

Open the front flip cover plate.

Disconnect the battery negative cable.

caution

power down the high-voltage system before

disconnecting the negative pole of the storage

battery.

Remove 2 harness connectors of the VDC assembly.

Remove 4 fixing bolts of the VDC assembly.

Remove the VDC assembly.

Installation Procedures

Move the VDC assembly to the mounting position.

Install 4 fixing bolts of the VDC assembly.

Torque:(11 +/- 1.5) ft lbs

Connect 2 harness connectors of the VDC assembly.

caution

The harness is firmly connected following the

principal of "insert until a click is heard for

confirmation".

Connect the battery negative cable.

Close the front flip cover plate.

Close the door.

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