7 Automotive Electrical Appliances / 7.8 Body Control Module (BCM) Device | PDF pages 1542-1649

7.8 Body Control Module (BCM) Device

7.8.1 Description and Operation

7.8.1.1 Description and Operation

1. Mobile phone wireless charging is a wireless energy

transfer process in which the energy is transferred from the

transmitting coil to the receiving coil based on the principle of

electromagnetic induction.

2. The mobile phone wireless charging function can be

achieved by placing a mobile phone that supports wireless

charging on a charging surface.

3. The mobile phone wireless charging function is not

applicable to all mobile phones, but only to "Qi" certified

mobile phones.

7.8.2 Specifications

7.8.2.1 Fastener Specifications

Range Of Torque

Fastener Specifications

Specifications

Foot Pounds of Torque (ft lbs)

The fixing bolt connecting the low-speed

alarm module (AVAS) and the low-

(18.5 +/- 2) ft lbs

speed alarm bracket assembly

The fixing bolts connecting the body

controller and the lower left dashboard

(6.5 +/- .75) ft lbs

controller fixing bracket

The fixing bolt connecting the lower left

dashboard controller bracket to the

(6.5 +/- .75) ft lbs

white body assembly

The fixing bolt connecting the lower left

dashboard controller bracket to the

(18.5 +/- 2) ft lbs

white body assembly

The fixing bolt connecting the lower left

(6.5 +/- .75) ft lbs

dashboard controller bracket to the

dashboard device

The fixing bolt connecting the lower left

(6.5 +/- .75) ft lbs

dashboard controller bracket and the

lower left bracket

The fixing bolt connecting the EBS

bracket to the lower left instrument

(6.5 +/- .75) ft lbs

panel controller fixing bracket

The fixing bolt connecting the column

(17 +/- 2) ft lbs

lock and the steering column assembly

The fixing bolt connecting the wireless

charging module bracket and the

(4.5 +/- .75) ft lbs

wireless charging module

7.8.3 Decomposition Diagram

7.8.3.1 Decomposition Diagram

Lower Left Mounting Brackt

Body Controller

NFC Antenna

Lower Left Instrument Panel Controller Mounting

Bracket

Wireless Charging Mode

EBS Bracket

Pillar Lock

Bluetooth + NFC Antenna

10.

Wireless Charging Module Braket

Card Key

7.8.4 System Schematic Diagram

7.8.4.1 Electrical Schematic Diagram

7.8.5 Diagnostic Information and Steps

7.8.5.1 Diagnostic Description

Before diagnosing faults in the vehicle body controller device, refer toDescription And OperationUnderstanding and familiarizing

oneself with the working principle of the vehicle body controller device before starting system diagnosis can help determine the

correct fault diagnosis steps when a fault occurs, and more importantly, it can help determine the situation described by the

customer belongs to normal operation. Any fault diagnosis of the vehicle body controller device should start with routine

inspection, guiding maintenance personnel to take the next logical step for fault diagnosis. Understanding and correctly using the

diagnostic process can shorten the diagnosis time and avoid misjudgment of faulty parts.

7.8.5.2 Routine Inspection

• Check for aftermarket devices that may affect the operation of the vehicle body control system, ensuring that these devices do

not affect the operation of the vehicle body control system.

• Check system components that are easily accessible or visible to ensure that there is no obvious damage or potential

malfunction.

7.8.5.3 DTC Confirmation

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

2. Run the vehicle again.

3. Read the fault code of the control system again to confirm if there are any fault codes output from the system.

– Yes:Diagnose based on the output fault code.

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

7.8.5.4 List Of Diagnostic Trouble Codes (DTC)

BDCU

Fault Description

Exclusion Method

Fault Code

High battery voltage

B111717

Refer to BDCU Power Fault

Low Battery Voltage

B111716

On the BCANFD4 network, the BDCU

cannot receive the CAN packet ADCU_

U015787

LCMD whose ID is 0x18FE4131, and

the communication between the BDCU

and the ADCU node fails. Procedure

The BDCU on BCANFD3 limps home

(send ID: 0x18FFF021 (BDCU_NM_

U220200

Limphome). Receive ID:0x18FFF058,

Refer to BDCU Communication Fault

(SSM_NM_Limphome)). The send or

receive timeout occurred. Procedure

There is no CAN message ABL_Light

with the ID of 0x18FF1455 received by

U018087

BDCU on the BCANFD1 network, and

the communication with the ADBL node

is lost

The Ethernet MDIO chip is abnormal

U018087

Fault Description

Exclusion Method

Fault Code

The BDCU on the BCANFD2 network

fails to receive the CAN message

U01A187

SJBUN_Status with the ID of

0x18FF1659, losing communication

with the SJBUN node

The BDCU on the BCANFD1 network

fails to receive the CAN message

U01A087

SJBUP_Status with the ID of

0x18FF1554, losing communication

with the SJBUP node

The BDCU on the BCANFD1 network is

unable to receive the CAN message

TPMS_F_TirePressure with the ID of

U012787

0x18FEF433, losing communication

with the TPMS_F node

The BDCU on the BCANFD2 network

fails to receive the CAN message AC_

U016487

RearStatus with the ID of 0x18FF2419,

losing communication with the AC node

The BDCU on the BCANFD2 network

fails to receive the CAN message

U018187

ADBR_Light with the ID of

0x18FF145A, losing communication

with the ADBR node

The BDCU on the BCAND2 network

cannot receive the CAN message AVA_

U014187

Status with ID 0x18FF0E57 and has lost

communication with the AVAS node

The BDCU on the BCANFD2 network

fails to receive the CAN message SDM_

U02A687

Status with the ID of 0x18FF0F1D,

losing communication with the SDM

node

The BDCU on the BCANFD3 network

fails to receive the CAN message DCM_

U019987

DC2 with the ID of 0x18FDA54F, losing

communication with the DCM node

The BDCU on the CANFD3 network

fails to receive the CAN message EPM_

U018887

Motor with the ID of 0x18F00E52, losing

communication with the EPM node

Fault Description

Exclusion Method

Fault Code

The BDCU on the BCANFD3 network is

unable to receive the CAN message

U014487

PWC_CS with the ID of 0x18FF0953

and loses communication with the PWC

node

The BDCU on the BCANFD3 network

fails to receive the CAN message SSM_

U024A87

Status with the ID of 0x18FF0F58 and

loses communication with the SSM

node

The BDCU on the BCANFD4 network

fails to receive the CAN message

TPMS_Trailer_TirePressure with the ID

U012F87

of 0x18FEF45D and loses

communication with the TPMS_Trailer

node

The BDCU on the BCAN5 network fails

to receive the CAN message ESCL_

U021287

STATUS with the ID of 0x18FE054D and

loses communication with the ESCL

node

The BDCU on the CANFD3 network

fails to receive the CAN message

U019887

TGW_TD_Time with the ID of

0x18FEE6EE and loses communication

with the TGW node

U007C88

BCANFD1 network Busoff

U007D88

BCANFD2 network Busoff

U007E88

BCANFD3 network Busoff

U007F88

BCANFD4 network Busoff

U008388

BCANFD5 network Busoff

U008488

BCAN6 network Busoff

The BDCU on the BCAN6 network fails

to receive the CAN message

U10538A

BCANFD6_RXID_NBSM_0x200 with

the ID of 0x200 and loses

communication with the Bluetooth node

Fault Description

Exclusion Method

Fault Code

The BDCU on CANFD3 fails to receive

the message with the ID of

0x18FEC1EE (CDCU_VDHR), resulting

U015687

in a timeout error and leading to the

belief that it has lost contact with the

CDCU

The BDCU on CANFD3 fails to receive

the message with the ID of

0x18FCC231 (VDC_HSS1), which

U012287

leads to a timeout error and makes it

consider that it has lost contact with the

VDCU

The BDCU on CANFD3 fails to receive

the message with the ID of

U012187

0x08FE6E0B (EBS_HRW) and thus

generates a timeout error, believing that

it has lost contact with the EBS

The BDCU on CANFD3 fails to receive

the message with the ID of 0x18FE1250

U012887

(EPBS1_EPB), which results in a

timeout error and leads to the belief that

it has lost contact with the EPB

U007588

CANFD3 BusOff

On BCANFD1, the BDCU enters limp -

home mode (sends ID:0x18FFF021

(BDCU_NM_Limphome), and receives

IDs:0x18FFF054 (SJBUP_NM_

U220600

Limphome), 0x18FFF055 (ADBL_NM_

Limphome), 0x18FFF059 (SJBUN_NM_

Limphome)), and a send or receive

timeout occurs

On BCANFD2, the BDCU enters limp -

home mode (sending ID:0x18FFF021

(BDCU_NM_Limphome) and receiving

U220700

IDs: 0x18FFF05A (ADBR_NM_

Limphome), 0x18FFF059 (SJBUN_NM_

Limphome)), resulting in a send or

receive timeout

Fault Description

Exclusion Method

Fault Code

On BCANFD3, the BDCU enters limp-

home mode (sending ID:0x18FFF021

(BDCU_NM_Limphome) and receiving

U220A00

ID:0x18FFF058 (SSM_NM_

Limphome)), which results in a send or

receive timeout

U015788

Communication with CAMF is lost

U238084

SQI insufficient

Refer to BDCU Internal Fault

The Ethernet MDIO chip is abnormal

U238208

Unexpected Ethernet connection loss

U238108

Refer to BDCU Ethernet Fault

The BDCU on the LIN1 network fails to

receive the slave - response message

U120387

RSL1 with the ID of 0x12, and the

communication with the RSL node is

abnormal

The BDCU on the LIN1 network can't

receive the slave - response message

Refer to BDCU LIN1 Communication

U105388

RSL2 with the ID of 0x13, and there is

Fault

an abnormal communication with the

RSL node

On the LIN1 network, the BDCU is

unable to receive the slave - response

U105389

message RSL3 with an ID of 0x14, and

the communication with the RSL node is

abnormal

Main vehicle right front turn signal Fault

Refer to Right Front Turn Signal Fault

B151635

Main vehicle left front turn signal Fault

Refer to Left Front Turn Signal Fault

B151735

The high beam/overtaking switch is

Refer to High Beam Overtaking Switch

B152532

faulty

Fault

The wiper combination switch is faulty

Refer to Wiper Switch Fault

B152632

The high voltage pressure signal input is

B152933

faulty

Refer to High Pressure & Temperature

Sensor Fault

The high voltage pressure signal input is

B152A33

faulty

The ON power feedback of the electrical

Refer to KL15 Power Feedback Signal

B153036

box is faulty

Fault

The power-on command output is faulty

B15353F

Refer to KL15 Power On/off Command

Output Signal Fault

The power-off command output is faulty

B15363F

The power supply to the height

Refer to Headlight Adjustment Motor

adjustment module of the low light is

B153831

Fault

faulty

Fault Description

Exclusion Method

Fault Code

The power supply to the left center left

Refer to Left Center Rear Turn Signal

rear turn signal of the main vehicle is

B153C31

Fault

faulty

The power supply of the right, middle

Refer to Right Center Rear Turn Signal

and right rear turn signal of the main

B153D31

Fault

vehicle is faulty

Refer to Wiper Motor Low-speed Signal

The wiper is faulty at low speed

B15403F

Fault

Refer to High Speed Signal Fault Of

High-speed wiper failure

B15413F

Wiper Motor

The wiper washing motor is faulty

Refer to Washing Motor Fault

B15423F

Rearview Mirror Heating Failure

Refer to Rearview Mirror Heating Fault

B154437

The charging port is unlocked.

B15453F

Refer to Charging Port Cover Lock

Procedure

Motor Fault

The charging port is blocked

B15463F

External toolbox motor unlocking failure

B15493F

Refer to External Toolbox Motor Fault

B154A3F

External toolbox motor lockout failure

The skylight visor opening function

B154B3F

failed

Refer to Fault Of The Sunroof Sunshade

The awning curtain closing function is

B154C3F

faulty

The upward adjustment of the left

B154D37

rearview mirror fails

The downward adjustment of the left

B154E37

rearview mirror fails

Refer to Left Physical Rearview Mirror

Adjustment Signal Fault

The left rearview mirror fails to adjust to

B154F37

the left

The left rearview mirror fails to adjust to

B155037

the right

The right rearview mirror fails to adjust

B155137

upwards

Right rearview mirror downward

B155237

adjustment failure

Refer to Right Physical Rearview Mirror

Adjustment Signal Fault

The left adjustment of the right rearview

B155337

mirror fails

The right rearview mirror fails to adjust

B155437

to the right

Refer to Interwheel Lock Solenoid Valve

The interwheel solenoid valve is faulty

B15573F

Fault

Refer to Main driver reading light power

Main driver reading light power supply

B155D31

supply failure

failure

Fault Description

Exclusion Method

Fault Code

Sleeper reading lamp power supply

Refer to Sleeper Reading Light Fault

B155E31

failure

The ceiling light power supply is faulty

Refer to Sky Roof Light Fault

B155F31

The power supply of the indicator lamp

Refer to Position Lamp Fault

B156031

is faulty

The backlight lighting power supply is

Refer to Backlight Power Fault

B156331

faulty

Danger alarm indicator key light power

Refer to Hazard Alarm Switch Backlight

B156431

supply failure

Power Fault

Secondary car window rising power

B156B31

supply failure

Refer to Right window regulator Fault

Secondary car window down power

B156C31

supply failure

Main driving window rising power supply

B156931

failure

Refer to Left window regulator Fault

Main driving window down power supply

B156A31

failure

7.8.5.5 BDCU Power Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

When the supply voltage rises to the upper limit of the

diagnostic voltage, the ECU immediately stops the

High battery voltage

network-related diagnostic function. When the supply

B111717

1. Main battery

voltage is in the overvoltage state for 2 seconds, the

2. Low voltage

overvoltage DTC is recorded

charging system

When the supply voltage drops below the diagnostic

3. Wiring harness

voltage limit, the ECU immediately stops the network-

4.BDCU

Low Battery Voltage

related diagnostic function. When the supply voltage is

B111716

in the undervoltage state for 2 seconds, the

undervoltage DTC is recorded

2.Circuit Diagram

Smart Junction

Left combination switch

Box - Chassis

Battery

Wash

Inter-

High

Low

Left

Right

Passing

High

mittent

speed

OFF

turn

AUTO

light

beam

B12-1

3KΩ

2180Ω

Total body power

3KΩ

2.2KΩ 1.5KΩ

680Ω

supply B+ L22

680Ω

150Ω

IP17-7 IP17-6

IP17-9

IP17-5

IP17-10

High beam/passing

Wiper switch signal

light switch B435

Wash switch B401

simulatively B416

Left/right turn

switch B415

B434

B01-1

B07-6

B07-5

Smart Junction

I3_IP_B

Box - Body

I3_B_IP

BDCU-B+1 P105

BDCU-B+2 P106

Wiper switch signal

High beam/passing

light switch B435

Wash switch B401

Left/right turn

simulatively B416

switch B415

B434

B65-3

B65-9

B48-16

B48-34

B48-1

B48-15

B48-35

BDCU

120Ω

B65-7 B65-16

B48-19

B48-39

B48-16

B46-20

B47-2

BCANFD3-L BL03

BCANFD3-H BH03

Ground Z05

Analog switch (light/wip-

Ground Z05

Low light height gear

er) public area B416

Low-beam adjustment

signal output B302

motor + B220

Ground Z05

G27

Power source B220b

Power source B220a

Gear signal B302b

Gear signal B302a

Ground B416

B37-1

B37-2

B37-3

B15-1

B15-3

B15-2

BCANFD3

Right low-beam adjustment motor

Left low-beam adjustment motor

Ground Z01

Smart Junction

Ground B436e

Ground B436f

Battery

BU02-1

Box - Chassis

Ground B436e

Ground B436d

G22

Front mask

Outlet water

C80-1

switch

Inlet water

temperature

C81-1

C1-1

temperature

sensor

Compressor

C70-2

sensor

Ambient

exhaust

B38-1

BU02-1

KL15 Power supply 1 G01

temp

temperature

C80-2

sensor

C81-2

I7_C_B

Front cover unlocked

C70-1

B38-2

signal B616a

Inlet temperature

Effluent tempera-

ture signal B410

sensorily B436e

I7_B_C

signal B431

Sensor signal

KL15-1 G01a

B430

Outdoor temperature signal B411

I_BU_B

I3_C_B

I_B_BU

I3_B_C

Front cover unlocked

KL15 power signal

KL15-1 G01a

feedback G01n

Inlet temperature

Effluent tempera-

ture signal B410

Sensor signal

signal B616a

signal B431

sensorily B436

B430

B48-11

B48-10

B48-30

B48-31

B48-36

B64-16

B47-4

BDCU

120Ω

B64-6

B61-26

B48-20

B61-12

B48-40

B48-37

B48-17

Turn to oil tank level

sensor signal B606

GWCANFD3-H TH03

GWCANFD3-L TL03

BCAN6-H BH06

BCANFD1-H BH01

BCAN6-L BL06

BCANFD1-L BL01

Ground Z56

G06

I4_B_C

Turn to tank

I4_C_B

C49-2

level sensor

Turn to oil tank level

sensor signal B606

C49-1

BCANFD1

GWCANFD3

BCANFD6

3. 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 other module power fault codes besides BDCU?

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 Malfunction

Next step

– No:

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

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.6 BDCU Communication Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

On the BCANFD4

network, the BDCU

cannot receive the

1.The timeout period for receiving CAN ADCU_LCMD

CAN packet ADCU_

reaches 10 *Cycle (Cycle = 100 ms).

LCMD whose ID is

U015787

2.KL30 on;

0x18FE4131, and the

3. Diagnostic voltage range;

communication

between the BDCU

and the ADCU node

fails. Procedure

The BDCU on

BCANFD3 limps home

(send ID:0x18FFF021

(BDCU_NM_

1. Wiring harness

Limphome). Receive

The BDCU on the BCANFD3 limps home, resulting in a

2.BDCU

U220200

ID:0x18FFF058,

send or receive timeout.

(SSM_NM_

Limphome)). The send

or receive timeout

occurred. Procedure

There is no CAN

message ABL_Light

with the ID of

1. The timeout period for receiving CAN packets ABL_

0x18FF1455 received

LightJIE reaches 10 *Cycle (Cycle = 100 ms).

U018087

by BDCU on the

2.KL15 on;

BCANFD1 network,

3. Diagnostic voltage range;

and the

communication with

the ADBL node is lost

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.In section 1 and 4_1, add DID:2506 Debug log path

information, 2507 Bluetooth primary node VIN code,

2508 Bluetooth primary node serial number, 2509

The Ethernet MDIO

U018087

Bluetooth primary node software version, 250A

chip is abnormal

Bluetooth left node software version, 250B Bluetooth

right node software version, and 250C Bluetooth front

node software version

The BDCU on the

BCANFD2 network

1. The timeout period for receiving CAN message

fails to receive the

SJBUN_Status reaches 10 *Cycle (Cycle = 100 ms).

CAN message

U01A187

2.network wake up;

SJBUN_Status with

3.Diagnostic voltage range;

the ID of 0x18FF1659,

losing communication

with the SJBUN node

The BDCU on the

BCANFD1 network

1. The timeout period for receiving CAN message

fails to receive the

SJBUP_Status reaches 10 *Cycle (Cycle = 100 ms).

CAN message

U01A087

2.network wake up;

SJBUP_Status with

3. Diagnostic voltage range;

the ID of 0x18FF1554,

losing communication

with the SJBUP node

The BDCU on the

BCANFD1 network is

1. The TPMS_F_TirePressure receiving timeout period

unable to receive the

reaches 10 *Cycle (Cycle = 500 ms).

CAN message TPMS_

U012787

2.KL15 on;

F_TirePressure with

3. Diagnostic voltage range;

the ID of 0x18FEF433,

losing communication

with the TPMS_F node

The BDCU on the

BCANFD2 network

1.The receiving timeout of the CAN message AC_

fails to receive the

RearStatus reaches 10 * Cycle (where Cycle = 100 ms).

CAN message AC_

U016487

2.KL15 on;

RearStatus with the ID

3. Diagnostic voltage range;

of 0x18FF2419, losing

communication with

the AC node

Description

DTC Trigger Conditions

Faulty Part

DTC Code

The BDCU on the

BCANFD2 network

1.The receiving timeout of the CAN message ADBR_

fails to receive the

Light reaches 10 * Cycle (where Cycle = 100 ms).

CAN message ADBR_

U018187

2.KL15 on;

Light with the ID of

3. Diagnostic voltage range;

0x18FF145A, losing

communication with

the ADBR node

The BDCU on the

BCANFD2 network

1. The timeout period for receiving CAN packet AVAS_

fails to receive the

Status reaches 10 *Cycle (Cycle = 500 ms).

CAN message AVAS_

U014187

2.KL15 on;

Status with the ID of

3. Diagnostic voltage range;

0x18FF0E57, losing

communication with

the AVAS node

The BDCU on the

BCANFD2 network

1. The timeout period for receiving CAN SJBUN_Status

fails to receive the

packets reaches 5000 ms(Cycle = 1000 ms).

CAN message SDM_

U02A687

2.network wake up;

Status with the ID of

3. Diagnostic voltage range;

0x18FF0F1D, losing

communication with

the SDM node

The BDCU on the

BCANFD3 network

1. The timeout period for receiving CAN DCM_DC2

fails to receive the

packets reaches 10 *Cycle (Cycle = 100 ms).

CAN message DCM_

U019987

2. Power on the DCM.

DC2 with the ID of

3. Diagnostic voltage range;

0x18FDA54F, losing

communication with

the DCM node

The BDCU on the

CANFD3 network fails

1. The timeout period for receiving CAN packet EPM_

to receive the CAN

Motor reaches 10 *Cycle (Cycle = 200 ms).

message EPM_Motor

U018887

2.KL15 on;

with the ID of

3. Diagnostic voltage range;

0x18F00E52, losing

communication with

the EPM node

Description

DTC Trigger Conditions

Faulty Part

DTC Code

The BDCU on the

BCANFD3 network is

1. The timeout period for receiving CAN packets PWC_

unable to receive the

CS reaches 5000(Cycle = 1000 ms).

CAN message PWC_

U014487

2.KL15 on;

CS with the ID of

3. Diagnostic voltage range;

0x18FF0953 and loses

communication with

the PWC node

The BDCU on the

BCANFD3 network

1. The timeout period for receiving CAN packet SSM_

fails to receive the

Status reaches 10 *Cycle (Cycle = 200 ms).

CAN message SSM_

U024A87

2.KL15 on;

Status with the ID of

3. Diagnostic voltage range;

0x18FF0F58 and loses

communication with

the SSM node

The BDCU on the

BCANFD4 network

fails to receive the

1. The TPMS_Trailer_TirePressure receive timeout

CAN message TPMS_

period reaches 5000 (Cycle = 50000 ms).

Trailer_TirePressure

U012F87

2.KL15 on;

with the ID of

3. Diagnostic voltage range;

0x18FEF45D and

loses communication

with the TPMS_Trailer

node

The BDCU on the

BCAN5 network fails

1.The receiving timeout of the CAN message ESCL_

to receive the CAN

STATUS reaches 10 * Cycle (where Cycle = 50 ms).

message ESCL_

U021287

2.KL15 on;

STATUS with the ID of

3. Diagnostic voltage range;

0x18FE054D and

loses communication

with the ESCL node

The BDCU on the

CANFD3 network fails

1. The timeout period for receiving CAN TGW_TD_

to receive the CAN

Time packets reaches 5000(Cycle = 1000 ms).

message TGW_TD_

U019887

2.KL15 on;

Time with the ID of

3. Diagnostic voltage range;

0x18FEE6EE and

loses communication

with the TGW node

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. The BCANFD1 network CAN controller enters the

BusOff state.

BCANFD1 network

U007C88

2.network wake up;

Busoff

3. Diagnostic voltage range;

1. The BCANFD2 network CAN controller enters the

BusOff state.

BCANFD2 network

U007D88

2.network wake up;

Busoff

3. Diagnostic voltage range;

1. The BCANFD3 network CAN controller enters BusOff

state;

BCANFD3 network

U007E88

2.network wake up;

Busoff

3. Diagnostic voltage range;

1. The BCANFD4 network CAN controller enters BusOff

state;

BCANFD4 network

U007F88

2.network wake up;

Busoff

3. Diagnostic voltage range;

1. The BCANFD5 network CAN controller enters BusOff

state;

BCANFD5 network

U008388

2.network wake up;

Busoff

3. Diagnostic voltage range;

1. The BCAN6 network CAN controller enters the

BusOff state;

BCAN6 network

U008488

2.network wake up;

Busoff

3. Diagnostic voltage range;

The BDCU on the

BCAN6 network fails

1. The timeout period for receiving CAN packets

to receive the CAN

BCANFD6_RXID_NBSM_0x200 reaches 10 x Cycle

message BCANFD6_

(Cycle = 100 ms).

U10538A

RXID_NBSM_0x200

2.KL15 on;

with the ID of 0x200

3. Diagnostic voltage range;

and loses

communication with

the Bluetooth node

Description

DTC Trigger Conditions

Faulty Part

DTC Code

The BDCU on

CANFD3 fails to

receive the message

1. The timeout period for receiving CAN CDCU_VDHR

with the ID of

packets reaches 10000(Cycle = 1000ms).

0x18FEC1EE (CDCU_

U015687

2.KL15 on;

VDHR), resulting in a

3. Diagnostic voltage range;

timeout error and

leading to the belief

that it has lost contact

with the CDCU

The BDCU on

CANFD3 fails to

receive the message

1. The timeout period for receiving CAN packets VDC_

with the ID of

HSS1 reaches 1000(Cycle = 100ms).

0x18FCC231 (VDC_

U012287

2.KL15 on;

HSS1), which leads to

3. Diagnostic voltage range;

a timeout error and

makes it consider that

it has lost contact with

the VDCU

The BDCU on

CANFD3 fails to

receive the message

1. The timeout period for receiving CAN EBS_HRW

with the ID of

packets reaches 20(Cycle = 200ms).

0x08FE6E0B (EBS_

U012187

2.KL15 on;

HRW) and thus

3. Diagnostic voltage range;

generates a timeout

error, believing that it

has lost contact with

the EBS

The BDCU on

CANFD3 fails to

receive the message

1. The timeout period for receiving CAN packets VDC_

with the ID of

HSS1 reaches 1000(Cycle = 100ms).

0x18FE1250 (EPBS1_

U012887

2.KL15 on;

EPB), which results in

3. Diagnostic voltage range;

a timeout error and

leads to the belief that

it has lost contact with

the EPB

U007588

CANFD3 BusOff

CANFD3 BusOff occurs for five consecutive times

Description

DTC Trigger Conditions

Faulty Part

DTC Code

On BCANFD1, the

BDCU enters limp -

home mode (sends

ID:0x18FFF021

(BDCU_NM_

Limphome), and

receives

The BDCU on BCANFD1 limps home, resulting in

IDs:0x18FFF054

U220600

sending or receiving timeout.

(SJBUP_NM_

Limphome),

0x18FFF055 (ADBL_

NM_Limphome),

0x18FFF059 (SJBUN_

NM_Limphome)), and

a send or receive

timeout occurs

On BCANFD2, the

BDCU enters limp -

home mode (sending

ID:0x18FFF021

(BDCU_NM_

Limphome) and

The BDCU on BCANFD2 limps home, resulting in

receiving

U220700

sending or receiving timeout.

IDs:0x18FFF05A

(ADBR_NM_

Limphome),

0x18FFF059 (SJBUN_

NM_Limphome)),

resulting in a send or

receive timeout

On BCANFD3, the

BDCU enters limp-

home mode (sending

ID:0x18FFF021

(BDCU_NM_

Limphome) and

The BDCU on the BCANFD3 limps home, resulting in a

U220A00

receiving

send or receive timeout.

ID:0x18FFF058

(SSM_NM_

Limphome)), which

results in a send or

receive timeout

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. The timeout period for receiving CAN CAMF_Stauts

reaches 10 x Cycle (Cycle =100 ms).

Communication with

U015788

2.KL15 on;

CAMF is lost

3. Diagnostic voltage range;

2.Circuit Diagram

Smart Junction

Left combination switch

Box - Chassis

Battery

Wash

Inter-

High

Low

Left

Right

Passing

High

mittent

speed

OFF

turn

AUTO

light

beam

B12-1

3KΩ

2180Ω

Total body power

3KΩ

2.2KΩ 1.5KΩ

680Ω

supply B+ L22

680Ω

150Ω

IP17-7 IP17-6

IP17-9

IP17-5

IP17-10

High beam/passing

Wiper switch signal

light switch B435

Wash switch B401

simulatively B416

Left/right turn

switch B415

B434

B01-1

B07-6

B07-5

Smart Junction

I3_IP_B

Box - Body

I3_B_IP

BDCU-B+1 P105

BDCU-B+2 P106

Wiper switch signal

High beam/passing

light switch B435

Wash switch B401

Left/right turn

simulatively B416

switch B415

B434

B65-3

B65-9

B48-16

B48-34

B48-1

B48-15

B48-35

BDCU

120Ω

B65-7 B65-16

B48-19

B48-39

B48-16

B46-20

B47-2

BCANFD3-L BL03

BCANFD3-H BH03

Ground Z05

Analog switch (light/wip-

Ground Z05

Low light height gear

er) public area B416

Low-beam adjustment

signal output B302

motor + B220

Ground Z05

G27

Power source B220b

Power source B220a

Gear signal B302b

Gear signal B302a

Ground B416

B37-1

B37-2

B37-3

B15-1

B15-3

B15-2

BCANFD3

Right low-beam adjustment motor

Left low-beam adjustment motor

Ground Z01

Smart Junction

Ground B436e

Ground B436f

Battery

BU02-1

Box - Chassis

Ground B436e

Ground B436d

G22

Front mask

Outlet water

C80-1

switch

Inlet water

temperature

C81-1

C1-1

temperature

sensor

Compressor

C70-2

sensor

Ambient

exhaust

B38-1

BU02-1

KL15 Power supply 1 G01

temp

temperature

C80-2

sensor

C81-2

I7_C_B

Front cover unlocked

C70-1

B38-2

signal B616a

Inlet temperature

Effluent tempera-

ture signal B410

sensorily B436e

I7_B_C

signal B431

Sensor signal

KL15-1 G01a

B430

Outdoor temperature signal B411

I_BU_B

I3_C_B

I_B_BU

I3_B_C

Front cover unlocked

KL15 power signal

KL15-1 G01a

feedback G01n

Inlet temperature

Effluent tempera-

ture signal B410

Sensor signal

signal B616a

signal B431

sensorily B436

B430

B48-11

B48-10

B48-30

B48-31

B48-36

B64-16

B47-4

BDCU

120Ω

B64-6

B61-26

B48-20

B61-12

B48-40

B48-37

B48-17

Turn to oil tank level

sensor signal B606

GWCANFD3-H TH03

GWCANFD3-L TL03

BCAN6-H BH06

BCANFD1-H BH01

BCAN6-L BL06

BCANFD1-L BL01

Ground Z56

G06

I4_B_C

Turn to tank

I4_C_B

C49-2

level sensor

Turn to oil tank level

sensor signal B606

C49-1

BCANFD1

GWCANFD3

BCANFD6

Left center control switch devices

IP10-4

IP10-1

IP10-2

IP10-5

IP10-6

IP10-9

IP10-8

IP10-3

Left window lift switch

Main drive visor lift

Right window drop

Left window drop

lowering switch B404

Backlight + B218

Main drive shade

Right window lift

switch B506

switch B520

switch B507

switch B521

Ground Z12

B522

I2_IP_B

I3_IP_B

I2_B_IP

I3_B_IP

G14

Left window lift switch

Main drive visor lift

Right window drop

lowering switch B404

Main drive shade

Left window drop

Right window lift

Backlight + B218

switch B506

switch B520

switch B521

switch B507

B522

B61-6

B61-20

B61-21

B61-22

B48-4

B61-7

B46-18

BDCU

120Ω

B46-18

B61-27

B48-18

B48-38

B61-13

Backlight + B218

Backlight +

B218

ESCL-BCAN5-H BH05

ESCL-BCAN5-L BL05

BCANFD2-H BH02

BCANFD2-L BL02

I3_B_IP

I3_IP_B

Backlight power supply PWM+ B218b

Backlight +

B218

Backlight PWM B218c

Block the backlight

Backlight + B218e

PWM B218d

backlight B218a

B85-7

IP10-3

IP16-4

IP21-3

IP09-4

BCANFD2

ESCL-BCAN5

Sleeper

Right center

Sliding door

Left center

switch

Clock-spring

control switch

switch

control switch

devices

Ground Z11

Ground Z12

T-GW Ethernet

Ground Z12b

Ground Z12a

B78-6

B78-5

G28

Ground Z11

Sliding door

G14

IP09-3

IP09-1

switch

Step

B28-1

B29-1

light 1

light 2

BDCU-TGW 100 Mbit Ethernet TBN

BDCU-TGW 100 Mbit Ethernet TBP

IP09-2

IP09-4

Sliding door

switch B424

B28-2

B29-2

Backlight +

B218e

Step light +

Step light

+ B315a

B315b

Backlight + B218

I3_IP_B

I1_IP_B

Sliding door

switch B424

Step light +

I3_B_IP

I1_B_IP

B315

B47-15

B61-17

B64-17

B61-16

B46-18

BDCU

120Ω

B46-12

B46-23

B48-40

B48-20

B48-22

B46-11

B48-2

Left center rear

Right front turn signal fault feedback

turn signal B223

Left front turn signal fault feedback

GWCANFD3-H TH03

GWCANFD3-L TL03

Right front turn signal B211

Left front turn signal B212

B402

B422

I9_B_C

I9_C_B

Left steering

B223

Front left

Front right

B16-4

B33-4

B16-6

B33-6

combina-

tion light

C17-2

B33-5

Ground Z01 B16-5

GWCANFD3

Combination

C17-1

lamp-lh rr

Ground Z07

Ground Z68

G22

G23

G01

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC Confirmation

Step 2:Routine inspection. Refer to Routine Inspection

Step 3:Check the BCAN6 bus communication harness. Refer to Inspection Of BCAN6 Bus Network Integrity

Step 4:Check the BCANFD3 bus communication harness. Refer to Inspection Of BCAND3 Bus Network Integrity

Step 5:Check the BCAN5 bus communication harness. Refer to Inspection Of BCAN5 Bus Network Integrity

Step 6:Check the BCAND2 bus communication harness. Refer to Inspection Of BCAND2 Bus Network Integrity

Step 7:Check the CANFD3 bus communication harness. Refer to Inspection Of CANFD3 Bus Network Integrity

Step 8:Check the BCANFD1 bus communication harness. Refer to Inspection Of BCAND1 Bus Network Integrity

Step 9:BDCU rewrite configuration code, software reload, upgrade.

Step 10:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 11:Clear and confirm DTC.

7.8.5.7 BDCU Internal Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

U238084

SQI insufficient

SQI below the threshold occurs 20 times within 60s

The Ethernet MDIO

1.BDCU

Unable to read SWITCH chip register

U238208

chip is abnormal

2. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC Confirmation

Step 2:Routine inspection. Refer to Routine Inspection

Step 3:BDCU rewrite configuration code, software reload, upgrade.

Step 4:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 5:Clear and confirm DTC.

7.8.5.8 BDCU Ethernet Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

If the current link status of the Ethernet port is not link-

Up, the counter increases by 1. If the current link status

1. Wiring harness

Unexpected Ethernet

U238108

is not link-Up for 10 consecutive times, a fault is

2.BDCU

connection loss

reported

2.Circuit Diagram

Ground Z11

Ground Z12

T-GW Ethernet

Ground Z12b

Ground Z12a

B78-6

B78-5

G28

Ground Z11

Sliding door

G14

IP09-3

IP09-1

switch

Step

B28-1

B29-1

light 1

light 2

BDCU-TGW 100 Mbit Ethernet TBN

BDCU-TGW 100 Mbit Ethernet TBP

IP09-2

IP09-4

Sliding door

switch B424

B28-2

B29-2

Backlight +

B218e

Step light +

Step light

+ B315a

B315b

Backlight + B218

I3_IP_B

I1_IP_B

Sliding door

switch B424

Step light +

I3_B_IP

I1_B_IP

B315

B47-15

B61-17

B64-17

B61-16

B46-18

BDCU

120Ω

B46-12

B46-23

B48-40

B48-20

B48-22

B46-11

B48-2

Left center rear

Right front turn signal fault feedback

turn signal B223

Left front turn signal fault feedback

GWCANFD3-H TH03

GWCANFD3-L TL03

Right front turn signal B211

Left front turn signal B212

B402

B422

I9_B_C

I9_C_B

Left steering

B223

Front left

Front right

B16-4

B33-4

B16-6

B33-6

combina-

tion light

C17-2

B33-5

Ground Z01 B16-5

GWCANFD3

Combination

C17-1

lamp-lh rr

Ground Z07

Ground Z68

G22

G23

G01

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC Confirmation

Step 2:Routine inspection. Refer to Routine Inspection

Step 3:Check the BDCU Ethernet harness.

Step 4:BDCU rewrite configuration code, software reload, upgrade.

Step 5:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 6:Clear and confirm DTC.

7.8.5.9 BDCU LIN1 Communication Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

The BDCU on the LIN1

network fails to receive

1. The BDCU cannot receive response packet RSL1

the slave - response

from the slave whose ID is 0x12.

message RSL1 with

U120387

2, KL15 on;

the ID of 0x12, and the

3, diagnostic voltage range;

communication with

the RSL node is

abnormal

The BDCU on the LIN1

network can't receive

1. The BDCU cannot receive response packet RSL3

the slave - response

1. Wiring harness

from the slave machine whose ID is 0x13.

message RSL2 with

2.Sunshine and

U105388

2, KL15 on;

the ID of 0x13, and

rainfall sensor

3, diagnostic voltage range;

there is an abnormal

3.BDCU

communication with

the RSL node

On the LIN1 network,

the BDCU is unable to

receive the slave -

1. The BDCU cannot receive response packet RSL3

response message

from the slave whose ID is 0x14.

U105389

RSL3 with an ID of

2, KL15 on;

0x14, and the

3, diagnostic voltage range;

communication with

the RSL node is

abnormal

2.Circuit Diagram

Right center axle brake pads

Trailer brake pads

From left center

to right front H32

C08-1

C37-1

C08-2

C37-2

Ground Z67

From the middle right

Light rain sensor

to the back right H09

From left center

to right front H12

RR08-4

C26-2

Left center axle brake

Sunlight rainfall LIN

G03

Right rear axle brake pads

Right front axle brake pads

pads

C09-1

C56-1

C09-2

C56-2

B309

C26-1

Front right to

From back right

to back left H10

front left H13

I_RR_B

Left front axle brake pads

Left rear axle brake pads

From back left to

C76-1

C76-2

center left H11

C23-2

C23-1

I_B_RR

Sunlight rainfall LIN

Brake pad wear alarm signal B421

Enter BDCU B421

I4_C_B

B309

I4_B_C

B48-21

B47-9

BDCU

B65-13

B65-14

B65-15

B65-17

B46-24

B46-19

Right turn

signal B224

Right window down + B115

Left window down + B113

Profile light +

Right window up + B117

Profile light + B219

Left window up + B114

B219

I9_B_C

I_B_LR

I1_LR_T

I9_C_B

Steering/braking

positive pole

I_LR_B

I1_T_LR

B224

Profile light +

B219b

B219a

Com-

bina-

C11-3

B90-2

B90-1

tion

marker lamp-rh frt

marker lamp-lh frt

T07-2

T08-2

lamp-

End-outline

rh rr

B32-1

B32-11

C11-1

T07-1

T08-1

Sliding door hinge

Ground Z68

Ground Z16

Left glass regulator

G01

G10

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC Confirmation

Step 2:Routine inspection. Refer to Routine Inspection

Step 3:Check the LIN1 network harness between the BDCU and the sunlight rain sensor.

Step 4:Replace the sunlight and rain sensor. Refer to Replacement Of Sunshine Rainfall Sensor

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.10 Right Front Turn Signal Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. Wiring harness

2.Front right

1, KL15 on;

Main vehicle right front

combination lamp

2. After the switch is turned on/off, the voltage collected

B151635

turn signal malfunction

(right front turn

by the controller does not change;

signal)

3.BDCU

2.Circuit Diagram

Ground Z11

Ground Z12

T-GW Ethernet

Ground Z12b

Ground Z12a

B78-6

B78-5

G28

Ground Z11

Sliding door

G14

IP09-3

IP09-1

switch

Step

B28-1

B29-1

light 1

light 2

BDCU-TGW 100 Mbit Ethernet TBN

BDCU-TGW 100 Mbit Ethernet TBP

IP09-2

IP09-4

Sliding door

switch B424

B28-2

B29-2

Backlight +

B218e

Step light +

Step light

+ B315a

B315b

Backlight + B218

I3_IP_B

I1_IP_B

Sliding door

switch B424

Step light +

I3_B_IP

I1_B_IP

B315

B47-15

B61-17

B64-17

B61-16

B46-18

BDCU

120Ω

B46-12

B46-23

B48-40

B48-20

B48-22

B46-11

B48-2

Left center rear

Right front turn signal fault feedback

turn signal B223

Left front turn signal fault feedback

GWCANFD3-H TH03

GWCANFD3-L TL03

Right front turn signal B211

Left front turn signal B212

B402

B422

I9_B_C

I9_C_B

Left steering

B223

Front left

Front right

B16-4

B33-4

B16-6

B33-6

combina-

tion light

C17-2

B33-5

Ground Z01 B16-5

GWCANFD3

Combination

C17-1

lamp-lh rr

Ground Z07

Ground Z68

G22

G23

G01

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 BDCU and the front right combination light (right front turn signal light).

Step 4:Check the grounding harness of the front right combination lamp (right front turn signal lamp).

Step 5:Connect the front right combination lamp (right front turn signal) to an external 12V power supply. Observe if the front

right combination lamp (right front turn signal) lights up?

Next step

– Yes:

Replace the front right combination light (right front turn signal light). Refer to Replacement Of Right Front

– No:

Combination Lamp

Step 6:BDCU rewrite configuration code, software reload, upgrade.

Step 7:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 8:Clear and confirm DTC.

7.8.5.11 Left Front Turn Signal Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. Wiring harness

2.Front left

1.KL15 on;

Main vehicle left front

combination lamp

2.After the switch is turned on/off, the voltage collected

B151735

turn signal malfunction

(left front turn

by the controller does not change;

signal)

3.BDCU

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 BDCU and the front left combination lamp (left front turn signal).

Step 4:Check the grounding harness of the front left combination lamp (left front turn signal).

Step 5:Connect the front left combination lamp (left front turn signal) to an external 12V power supply. Observe if the front left

combination lamp (left front turn signal) lights up?

Next step

– Yes:

Replace the front left combination lamp (left front turn signal). Refer to Replacement Of Left Front

– No:

Combination Lamp

Step 6:BDCU rewrite configuration code, software reload, upgrade.

Step 7:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 8:Clear and confirm DTC.

7.8.5.12 High Beam Overtaking Switch Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. Wiring harness

2.Left

1.KL15 on;

The high beam/

combination

2.After the switch is turned on/off, the voltage collected

overtaking switch is

B152532

switch (high

by the controller does not change;

faulty

beam overtaking

switch)

3.BDCU

2.Circuit Diagram

Smart Junction

Left combination switch

Box - Chassis

Battery

Wash

Inter-

High

Low

Left

Right

Passing

High

mittent

speed

OFF

turn

AUTO

light

beam

B12-1

3KΩ

2180Ω

Total body power

3KΩ

2.2KΩ 1.5KΩ

680Ω

supply B+ L22

680Ω

150Ω

IP17-7 IP17-6

IP17-9

IP17-5

IP17-10

High beam/passing

Wiper switch signal

light switch B435

Wash switch B401

simulatively B416

Left/right turn

switch B415

B434

B01-1

B07-6

B07-5

Smart Junction

I3_IP_B

Box - Body

I3_B_IP

BDCU-B+1 P105

BDCU-B+2 P106

Wiper switch signal

High beam/passing

light switch B435

Wash switch B401

Left/right turn

simulatively B416

switch B415

B434

B65-3

B65-9

B48-16

B48-34

B48-1

B48-15

B48-35

BDCU

120Ω

B65-7 B65-16

B48-19

B48-39

B48-16

B46-20

B47-2

BCANFD3-L BL03

BCANFD3-H BH03

Ground Z05

Analog switch (light/wip-

Ground Z05

Low light height gear

er) public area B416

Low-beam adjustment

signal output B302

motor + B220

Ground Z05

G27

Power source B220b

Power source B220a

Gear signal B302b

Gear signal B302a

Ground B416

B37-1

B37-2

B37-3

B15-1

B15-3

B15-2

BCANFD3

Right low-beam adjustment motor

Left low-beam adjustment motor

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 BDCU and the left combination switch (high beam overtaking switch).

Step 4:Check if the left combination switch (high beam overtaking switch) is functioning properly?

Operation

Switch Status

Turn on high beam/passing lights

Turn on the high beam/overtaking switch

Turn off high beam/passing lights

High beam/overtaking switch disconnected

Next step

– Yes:

Replace the left combination switch (high beam overtaking switch). Refer to Replacement Of Combination

– No:

Switch

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.13 Wiper Switch Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. Wiring harness

2. Left

1, KL15 on;

The wiper combination

combination

2. After the switch is turned on/off, the voltage collected

B152632

switch is faulty

switch (wiper

by the controller does not change;

switch)

3.BDCU

2.Circuit Diagram

Smart Junction

Left combination switch

Box - Chassis

Battery

Wash

Inter-

High

Low

Left

Right

Passing

High

mittent

speed

OFF

turn

AUTO

light

beam

B12-1

3KΩ

2180Ω

Total body power

3KΩ

2.2KΩ 1.5KΩ

680Ω

supply B+ L22

680Ω

150Ω

IP17-7 IP17-6

IP17-9

IP17-5

IP17-10

High beam/passing

Wiper switch signal

light switch B435

Wash switch B401

simulatively B416

Left/right turn

switch B415

B434

B01-1

B07-6

B07-5

Smart Junction

I3_IP_B

Box - Body

I3_B_IP

BDCU-B+1 P105

BDCU-B+2 P106

Wiper switch signal

High beam/passing

light switch B435

Wash switch B401

Left/right turn

simulatively B416

switch B415

B434

B65-3

B65-9

B48-16

B48-34

B48-1

B48-15

B48-35

BDCU

120Ω

B65-7 B65-16

B48-19

B48-39

B48-16

B46-20

B47-2

BCANFD3-L BL03

BCANFD3-H BH03

Ground Z05

Analog switch (light/wip-

Ground Z05

Low light height gear

er) public area B416

Low-beam adjustment

signal output B302

motor + B220

Ground Z05

G27

Power source B220b

Power source B220a

Gear signal B302b

Gear signal B302a

Ground B416

B37-1

B37-2

B37-3

B15-1

B15-3

B15-2

BCANFD3

Right low-beam adjustment motor

Left low-beam adjustment motor

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 BDCU and the left combination switch (wiper switch).

Step 4:Check if the left combination switch (wiper switch) is functioning properly?

Operation

Switch Status

Turn on the wiper at low speed

Wiper switch low gear on

Turn off the wiper at low speed

Wiper switch low gear disconnected

Turn on the wiper high gear

Wiper switch on high gear

Turn off the windshield wipers in high gear

Wiper switch high gear disconnected

Next step

– Yes:

Replace the left combination switch (wiper switch). Refer to Replacement Of Combination Switch

– No:

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.14 High Pressure & Temperature Sensor Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

The high voltage

1. Wiring harness

1, KL15 on;

pressure signal input is

2.Left thermal

B152933

2, the controller can not collect the input voltage

faulty

management unit

(left thermal

management unit

The high voltage

(high pressure &

1, KL15 on;

pressure signal input is

B152A33

temperature

2, the controller can not collect the input voltage

faulty

sensor))

3.BDCU

2.Circuit Diagram

Low pressure&temperature sensor

High pressure&temperature sensor

C85-4

C85-3

C85-2

C69-2

C69-1

C85-1

C69-3

C69-4

Seat

sensorily B436b

sensorily B436a

supply B414b

supply B414a

5V power

S01-1

Off seat switch signal B423

Temperature signal

Pressure signal

supply 5V B414c

sensorily B436e

Sensor power

Temperature

signal B432

B413

B412

B433

I_S_B

I3_C_B

I_B_S

I3_B_C

Sensor Power supply 5V+ high/Low

pressure&temperature sensor B414

High pressure&temperature

High pressure PT sensor -

Low pressure&temperature

Low pressure PT sensor

Off seat switch signal B423

pressure signa B433

- pressure signal B413

sensor B432

sensor B412

sensorily B436

B48-13

B48-32

B48-36

B48-14

B48-12

B48-33

B48-23

BDCU

B47-5

B47-6

B47-7

B47-11

External toolbox light

lamp 3+ B307

Identification

lamp 1+ B305

Identification

lamp 1+ B305

Identification

lamp 3+ B307

lamp 2 B306

Identification

+ B311

Iden-

Identi-

RR11-2

RR07-2

RR10-2

tifica-

fica-

I_B_RR

External

tion

B30-2

toolbox

lamp

light

RR11-1

RR10-1

RR07-1

I_RR_B

B30-1

Ground Z38

Ground Z26

G13

G32

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 BDCU and the left thermal management unit (high pressure & temperature sensor).

Step 4:Check if the left thermal management unit (high pressure & temperature sensor) is functioning properly?

Next step

– Yes:

Replace the left thermal management unit (high pressure & temperature sensor). Refer to Replacement Of

– No:

Thermal Management Unit (Left)

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.15 KL15 Power Feedback Signal Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. Wiring harness

The ON power

1.KL15 on;

2.Smart junction

feedback of the

B153036

2.the controller can not collect the input voltage

box DOWN

electrical box is faulty

3.BDCU

2.Circuit Diagram

Ground Z01

Smart Junction

Ground B436e

Ground B436f

Battery

BU02-1

Box - Chassis

Ground B436e

Ground B436d

G22

Front mask

Outlet water

C80-1

switch

Inlet water

temperature

C81-1

C1-1

temperature

sensor

Compressor

C70-2

sensor

Ambient

exhaust

B38-1

BU02-1

KL15 Power supply 1 G01

temp

temperature

C80-2

sensor

C81-2

I7_C_B

Front cover unlocked

C70-1

B38-2

signal B616a

Inlet temperature

Effluent tempera-

ture signal B410

sensorily B436e

I7_B_C

signal B431

Sensor signal

KL15-1 G01a

B430

Outdoor temperature signal B411

I_BU_B

I3_C_B

I_B_BU

I3_B_C

Front cover unlocked

KL15 power signal

KL15-1 G01a

feedback G01n

Inlet temperature

Effluent tempera-

ture signal B410

Sensor signal

signal B616a

signal B431

sensorily B436

B430

B48-11

B48-10

B48-30

B48-31

B48-36

B64-16

B47-4

BDCU

120Ω

B64-6

B61-26

B48-20

B61-12

B48-40

B48-37

B48-17

Turn to oil tank level

sensor signal B606

GWCANFD3-H TH03

GWCANFD3-L TL03

BCAN6-H BH06

BCANFD1-H BH01

BCAN6-L BL06

BCANFD1-L BL01

Ground Z56

G06

I4_B_C

Turn to tank

I4_C_B

C49-2

level sensor

Turn to oil tank level

sensor signal B606

C49-1

BCANFD1

GWCANFD3

BCANFD6

3. 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 power supply circuit?

Prioritize troubleshooting power supply circuit related faults.

– Yes:

Next step

– No:

Step 4:Check the KL15 power feedback harness between the BDCU and the smart junction box DOWN.

Step 5:Rewrite the configuration code, reload the software, and upgrade the smart junction box DOWN.

Step 6:Replace the smart junction box DOWN. Refer to Replacement Of Chassis Smart Electrical Box

Step 7:BDCU rewrite configuration code, software reload, upgrade.

Step 8:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 9:Clear and confirm DTC.

7.8.5.16 KL15 Power On/off Command Output Signal Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

The power-on

1, KL15 on;

command output is

B15353F

2, the controller can not collect the input voltage

faulty

1. Wiring harness

2.BDCU

The power-off

1, KL15 on;

command output is

B15363F

2, the controller can not collect the input voltage

faulty

2.Circuit Diagram

Smart Junction Box - Chassis

Battery

E-axle rear axle

E-axle mid axle

vehicle low

PLC controller

vehicle low voltage

voltage port

port

C95-3

C27-13

C25-13

C3-11

C3-10

KL15 Power-on and

KL30 Power-on and

power-off request

Trailer ABS fault

signal output B614

Differential lock

signal H01a

I7_B_C

B216

B201

I7_C_B

I5_C_B

I9_C_B

Differential lock

signal H01a

signal H01b

I5_B_C

I9_B_C

Differential lock status

I9_B_C

power-off request B201

KL30 Power-on and

KL15 Power-on and

power-off request

feedback H01

Trailer failure

light B614

B216

B64-14

B48-26

B46-1

B46-16

BDCU

B46-7

B46-8

B46-10

B46-21

B46-3

B46-17

B46-6

Right rearview mirror left/down

Adjust right rearview mirror

Left rearview mirror left/down

adjust the common endB208

Rearview mirror

adjust the public end B217

Left rear-view adjustment

heating + B221

mirror to the right B203

Adjust left rearview mirror

Adjust right rearview

upward B206

to right B207

upward B210

Rearview mirror

heating + B221

I_B_RR

I_B_LR

I_B_RR

I_RR_B

I_LR_B

I_RR_B

I_B_LR

I_B_RR

Adjust right rearview mirror

Adjust left rearview mirror

Left rear-view adjustment

left/down adjust the public

mirror to the right B203

Adjust right rearview

Right rearview mirror

Left rearview mirror

left/down adjust the

common endB208

I_LR_B

I_RR_B

to right B207

upward B210

upward B206

Rearview mirror

end B217

heating + B221

RR03-1

RR03-4

RR03-3

LR01-2

LR01-3

LR01-1

LR01-4

RR03-2

LR01-5

RR03-5

Left physical rearview mirror

Right physical rear view mirror

Ground Z39

Ground Z30

G12

G11

3. 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 power supply circuit?

Prioritize troubleshooting power supply circuit related faults.

– Yes:

Next step

– No:

Step 4:Check the hard wire collection harness between BDCU, smart junction box DOWN, and smart junction box UP.

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.17 Headlight Adjustment Motor Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

The power supply to

1. Wiring harness

the height adjustment

1.KL15 on;

2.Headlight

B153831

2.the controller can not collect the input voltage

module of the low light

adjustment motor

is faulty

3.BDCU

2.Circuit Diagram

Smart Junction

Left combination switch

Box - Chassis

Battery

Wash

Inter-

High

Low

Left

Right

Passing

High

mittent

speed

OFF

turn

AUTO

light

beam

B12-1

3KΩ

2180Ω

Total body power

3KΩ

2.2KΩ 1.5KΩ

680Ω

supply B+ L22

680Ω

150Ω

IP17-7 IP17-6

IP17-9

IP17-5

IP17-10

High beam/passing

Wiper switch signal

light switch B435

Wash switch B401

simulatively B416

Left/right turn

switch B415

B434

B01-1

B07-6

B07-5

Smart Junction

I3_IP_B

Box - Body

I3_B_IP

BDCU-B+1 P105

BDCU-B+2 P106

Wiper switch signal

High beam/passing

light switch B435

Wash switch B401

Left/right turn

simulatively B416

switch B415

B434

B65-3

B65-9

B48-16

B48-34

B48-1

B48-15

B48-35

BDCU

120Ω

B65-7 B65-16

B48-19

B48-39

B48-16

B46-20

B47-2

BCANFD3-L BL03

BCANFD3-H BH03

Ground Z05

Analog switch (light/wip-

Ground Z05

Low light height gear

er) public area B416

Low-beam adjustment

signal output B302

motor + B220

Ground Z05

G27

Power source B220b

Power source B220a

Gear signal B302b

Gear signal B302a

Ground B416

B37-1

B37-2

B37-3

B15-1

B15-3

B15-2

BCANFD3

Right low-beam adjustment motor

Left low-beam adjustment motor

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 BDCU and the headlight adjustment motor.

Step 4:The headlight adjustment motor is connected to an external 12V power supply. observe the headlight adjustment motor

is functioning properly?

Next step

– Yes:

Replace the headlight adjustment motor. Refer to Replacement of left headlight.Replacement Of Right

– No:

Headlight

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.18 Left Center Rear Turn Signal Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

The power supply to

1. Wiring harness

1.KL15 on;

the left center left rear

2.Left middle rear

B153C31

2.the controller can not collect the input voltage

turn signal of the main

turn signal

vehicle is faulty

3.BDCU

2.Circuit Diagram

Ground Z11

Ground Z12

T-GW Ethernet

Ground Z12b

Ground Z12a

B78-6

B78-5

G28

Ground Z11

Sliding door

G14

IP09-3

IP09-1

switch

Step

B28-1

B29-1

light 1

light 2

BDCU-TGW 100 Mbit Ethernet TBN

BDCU-TGW 100 Mbit Ethernet TBP

IP09-2

IP09-4

Sliding door

switch B424

B28-2

B29-2

Backlight +

B218e

Step light +

Step light

+ B315a

B315b

Backlight + B218

I3_IP_B

I1_IP_B

Sliding door

switch B424

Step light +

I3_B_IP

I1_B_IP

B315

B47-15

B61-17

B64-17

B61-16

B46-18

BDCU

120Ω

B46-12

B46-23

B48-40

B48-20

B48-22

B46-11

B48-2

Left center rear

Right front turn signal fault feedback

turn signal B223

Left front turn signal fault feedback

GWCANFD3-H TH03

GWCANFD3-L TL03

Right front turn signal B211

Left front turn signal B212

B402

B422

I9_B_C

I9_C_B

Left steering

B223

Front left

Front right

B16-4

B33-4

B16-6

B33-6

combina-

tion light

C17-2

B33-5

Ground Z01 B16-5

GWCANFD3

Combination

C17-1

lamp-lh rr

Ground Z07

Ground Z68

G22

G23

G01

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 BDCU and the left middle rear turn signal.

Step 4:Check the grounding harness of the left middle rear turn signal.

Step 5:Connect the left middle rear turn signal to an external 12V power supply. Observe if the left middle rear turn signal lights

up?

Next step

– Yes:

Replace the left middle rear turn signal. Refer to Replacement Of Left-Side Combination Marker Lamp

– No:

Step 6:BDCU rewrite configuration code, software reload, upgrade.

Step 7:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 8:Clear and confirm DTC.

7.8.5.19 Right Center Rear Turn Signal Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

The power supply of

1. Wiring harness

the right, middle and

1.KL15 on;

2.Right center

right rear turn signal of

B153D31

2.the controller can not collect the input voltage

rear turn signal

the main vehicle is

3.BDCU

faulty

2.Circuit Diagram

Right center axle brake pads

Trailer brake pads

From left center

to right front H32

C08-1

C37-1

C08-2

C37-2

Ground Z67

From the middle right

Light rain sensor

to the back right H09

From left center

to right front H12

RR08-4

C26-2

Left center axle brake

Sunlight rainfall LIN

G03

Right rear axle brake pads

Right front axle brake pads

pads

C09-1

C56-1

C09-2

C56-2

B309

C26-1

Front right to

From back right

to back left H10

front left H13

I_RR_B

Left front axle brake pads

Left rear axle brake pads

From back left to

C76-1

C76-2

center left H11

C23-2

C23-1

I_B_RR

Sunlight rainfall LIN

Brake pad wear alarm signal B421

Enter BDCU B421

I4_C_B

B309

I4_B_C

B48-21

B47-9

BDCU

B65-13

B65-14

B65-15

B65-17

B46-24

B46-19

Right turn

signal B224

Right window down + B115

Left window down + B113

Profile light +

Right window up + B117

Profile light + B219

Left window up + B114

B219

I9_B_C

I_B_LR

I1_LR_T

I9_C_B

Steering/braking

positive pole

I_LR_B

I1_T_LR

B224

Profile light +

B219b

B219a

Com-

bina-

C11-3

B90-2

B90-1

tion

marker lamp-rh frt

marker lamp-lh frt

T07-2

T08-2

lamp-

End-outline

rh rr

B32-1

B32-11

C11-1

T07-1

T08-1

Sliding door hinge

Ground Z68

Ground Z16

Left glass regulator

G01

G10

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 BDCU and the right center rear turn signal.

Step 4:Check the grounding harness of the right middle rear turn signal.

Step 5:Connect the right center rear turn signal to an external 12V power supply. Observe if the right center rear turn signal

lights up?

Next step

– Yes:

Replace the right center rear turn signal. Refer to Replacement Of Right-Side Combination Marker Lamp

– No:

Step 6:BDCU rewrite configuration code, software reload, upgrade.

Step 7:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 8:Clear and confirm DTC.

7.8.5.20 Wiper Motor Low-speed Signal Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.KL15 on;

1. Wiring harness

The wiper is faulty at

2.After the body end output power supply, the voltage

B15403F

2. Wiper motor

low speed

collected by the controller does not change;

3.BDCU

2.Circuit Diagram

Washing pot level sensor

Washing pot motor

Ground Z11

Seat

Clock-spring

Wiper motor

B39-4

S01-6

IP16-11

Seat belt switch

Horn switch

B24-1

B34-1

B24-2

B34-2

B39-5

B39-6

B39-1

B510

B425

Ground Z11

Washing liquid level switch B525

Wiper high speed power + B112

Wiper low speed power + B108

Washing motor power + B105

Ground Z07

I_S_B

I3_IP_B

Ground Z11

Wiper return signal B511

I_B_S

I3_B_IP

Seat belt switch

Horn switch

G23

B510

B425

G28

B65-8

B65-12

B61-11

B65-5

B48-25

B61-10

B61-25

BDCU

B63-11 B63-22

B61-9

B48-5

Toolbox switch

External toolbox reset signal B523

External toolbox motor

External toolbox motor lock B722

B405

unlock B711

Toolbox

B88-1

switch

B88-2

External

B87-2

B87-3

B87-1

toolbox

B87-4

Ground Z26

G32

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC Confirmation

Step 2:Routine inspection. Refer to Routine Inspection

Step 3:Check the low-speed power harness between BDCU and wiper motor.

Step 4:Check the grounding harness of the wiper motor.

Step 5:The wiper motor is connected to an external 12V power supply. observe the wiper motor is operating?

Next step

– Yes:

Replace the wiper motor. Refer to Replacement Of Wiper Motor Assembly

– No:

Step 6:BDCU rewrite configuration code, software reload, upgrade.

Step 7:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 8:Clear and confirm DTC.

7.8.5.21 High Speed Signal Fault Of Wiper Motor

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.KL15 on;

1. Wiring harness

High-speed wiper

2.After the body end output power supply, the voltage

B15413F

2.Wiper motor

failure

collected by the controller does not change;

3.BDCU

2.Circuit Diagram

Washing pot level sensor

Washing pot motor

Ground Z11

Seat

Clock-spring

Wiper motor

B39-4

S01-6

IP16-11

Seat belt switch

Horn switch

B24-1

B34-1

B24-2

B34-2

B39-5

B39-6

B39-1

B510

B425

Ground Z11

Washing liquid level switch B525

Wiper high speed power + B112

Wiper low speed power + B108

Washing motor power + B105

Ground Z07

I_S_B

I3_IP_B

Ground Z11

Wiper return signal B511

I_B_S

I3_B_IP

Seat belt switch

Horn switch

G23

B510

B425

G28

B65-8

B65-12

B61-11

B65-5

B48-25

B61-10

B61-25

BDCU

B63-11 B63-22

B61-9

B48-5

Toolbox switch

External toolbox reset signal B523

External toolbox motor

External toolbox motor lock B722

B405

unlock B711

Toolbox

B88-1

switch

B88-2

External

B87-2

B87-3

B87-1

toolbox

B87-4

Ground Z26

G32

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC Confirmation

Step 2:Routine inspection. Refer to Routine Inspection

Step 3:Check the high-speed power harness between BDCU and wiper motor.

Step 4:Check the grounding harness of the wiper motor.

Step 5:The wiper motor is connected to an external 12V power supply. observe the wiper motor is operating?

Next step

– Yes:

Replace the wiper motor. Refer to Replacement Of Wiper Motor Assembly

– No:

Step 6:BDCU rewrite configuration code, software reload, upgrade.

Step 7:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 8:Clear and confirm DTC.

7.8.5.22 Washing Motor Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.KL15 on;

1.Wiring harness

The wiper washing

2.After the body end output power supply, the voltage

B15423F

2.Wiper motor

motor is faulty

collected by the controller does not change;

3.BDCU

2.Circuit Diagram

Washing pot level sensor

Washing pot motor

Ground Z11

Seat

Clock-spring

Wiper motor

B39-4

S01-6

IP16-11

Seat belt switch

Horn switch

B24-1

B34-1

B24-2

B34-2

B39-5

B39-6

B39-1

B510

B425

Ground Z11

Washing liquid level switch B525

Wiper high speed power + B112

Wiper low speed power + B108

Washing motor power + B105

Ground Z07

I_S_B

I3_IP_B

Ground Z11

Wiper return signal B511

I_B_S

I3_B_IP

Seat belt switch

Horn switch

G23

B510

B425

G28

B65-8

B65-12

B61-11

B65-5

B48-25

B61-10

B61-25

BDCU

B63-11 B63-22

B61-9

B48-5

Toolbox switch

External toolbox reset signal B523

External toolbox motor

External toolbox motor lock B722

B405

unlock B711

Toolbox

B88-1

switch

B88-2

External

B87-2

B87-3

B87-1

toolbox

B87-4

Ground Z26

G32

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 BDCU and washing motor.

Step 4:Check the grounding harness of the washing motor.

Step 5:Connect the washing motor to an external 12V power supply and observe the washing motor is operating?

Next step

– Yes:

Replace the washing motor. Refer to Replacement Of Washing Pot Assembly

– No:

Step 6:BDCU rewrite configuration code, software reload, upgrade.

Step 7:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 8:Clear and confirm DTC.

7.8.5.23 Rearview Mirror Heating Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. Wiring harness

1.KL15 on;

Rearview Mirror

2.Physical

2.After the body end output power supply, the voltage

B154437

Heating Failure

rearview mirror

collected by the controller does not change;

3.BDCU

2.Circuit Diagram

Smart Junction Box - Chassis

Battery

E-axle rear axle

E-axle mid axle

vehicle low

PLC controller

vehicle low voltage

voltage port

port

C95-3

C27-13

C25-13

C3-11

C3-10

KL15 Power-on and

KL30 Power-on and

power-off request

Trailer ABS fault

signal output B614

Differential lock

signal H01a

I7_B_C

B216

B201

I7_C_B

I5_C_B

I9_C_B

Differential lock

signal H01a

signal H01b

I5_B_C

I9_B_C

Differential lock status

I9_B_C

power-off request B201

KL30 Power-on and

KL15 Power-on and

power-off request

feedback H01

Trailer failure

light B614

B216

B64-14

B48-26

B46-1

B46-16

BDCU

B46-7

B46-8

B46-10

B46-21

B46-3

B46-17

B46-6

Right rearview mirror left/down

Adjust right rearview mirror

Left rearview mirror left/down

adjust the common endB208

Rearview mirror

adjust the public end B217

Left rear-view adjustment

heating + B221

mirror to the right B203

Adjust left rearview mirror

Adjust right rearview

upward B206

to right B207

upward B210

Rearview mirror

heating + B221

I_B_RR

I_B_LR

I_B_RR

I_RR_B

I_LR_B

I_RR_B

I_B_LR

I_B_RR

Adjust right rearview mirror

Adjust left rearview mirror

Left rear-view adjustment

left/down adjust the public

mirror to the right B203

Adjust right rearview

Right rearview mirror

Left rearview mirror

left/down adjust the

common endB208

I_LR_B

I_RR_B

to right B207

upward B210

upward B206

Rearview mirror

end B217

heating + B221

RR03-1

RR03-4

RR03-3

LR01-2

LR01-3

LR01-1

LR01-4

RR03-2

LR01-5

RR03-5

Left physical rearview mirror

Right physical rear view mirror

Ground Z39

Ground Z30

G12

G11

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 BDCU and the physical rearview mirror heating wire.

Step 4:Check the grounding harness of the physical rearview mirror heating wire.

Step 5:Check if the heating wire of the physical rearview mirror is normal?

Next step

– Yes:

Replace the physical rearview mirror. Refer to Replacement Of The Left Physical Exterior Rearview Mirror

– No:

Assembly.Replacement Of The Right Physical Exterior Rearview Mirror Assembly

Step 6:BDCU rewrite configuration code, software reload, upgrade.

Step 7:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 8:Clear and confirm DTC.

7.8.5.24 Charging Port Cover Lock Motor Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1, KL15 on;

The charging port is

2. After the body end output power supply, the voltage

B15453F

1. Wiring harness

unlocked. Procedure

collected by the controller does not change;

2.Charging port

cover lock motor

1, KL15 on;

The charging port is

3.BDCU

2. After the body end output power supply, the voltage

B15463F

blocked

collected by the controller does not change;

2.Circuit Diagram

Smart Junction

Box - Chassis

Battery

BDCU

C4-17

B47-32

B47-31

B46-5

B46-9

Left charging port motor

Right charging port motor

Right charging port

Left charging port

motor - lock B205

- Unlock B332

motor - B331

- Unlock B209

Charging port cover +

controlled KL30 O417

I3_B_C

I3_C_B

Blocked + B205

Blocked + B331a

Unlock + B209

Unlock + B332a

Power O417

C47-3

C47-1

C47-2

C60-1

C60-2

C60-3

C47-4

C60-4

Left charging port

Right charging port

cover locks motor

Ground Z60

Ground Z69

G04

G05

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 BDCU and the charging port cover lock motor.

Step 4:Connect the charging port cover lock motor to an external 12V power supply and observe the charging port cover lock

motor is operating?

Next step

– Yes:

Replace the charging port cover lock motor.

– No:

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.25 External Toolbox Motor Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. KL15 on;

External toolbox motor

2. After the body end output power supply, the voltage

B15493F

1. Wiring harness

unlocking failure

collected by the controller does not change;

2. External

toolbox motor

1. KL15 on;

External toolbox motor

3.BDCU

2. After the body end output power supply, the voltage

B154A3F

lockout failure

collected by the controller does not change;

2.Circuit Diagram

Washing pot level sensor

Washing pot motor

Ground Z11

Seat

Clock-spring

Wiper motor

B39-4

S01-6

IP16-11

Seat belt switch

Horn switch

B24-1

B34-1

B24-2

B34-2

B39-5

B39-6

B39-1

B510

B425

Ground Z11

Washing liquid level switch B525

Wiper high speed power + B112

Wiper low speed power + B108

Washing motor power + B105

Ground Z07

I_S_B

I3_IP_B

Ground Z11

Wiper return signal B511

I_B_S

I3_B_IP

Seat belt switch

Horn switch

G23

B510

B425

G28

B65-8

B65-12

B61-11

B65-5

B48-25

B61-10

B61-25

BDCU

B63-11 B63-22

B61-9

B48-5

Toolbox switch

External toolbox reset signal B523

External toolbox motor

External toolbox motor lock B722

B405

unlock B711

Toolbox

B88-1

switch

B88-2

External

B87-2

B87-3

B87-1

toolbox

B87-4

Ground Z26

G32

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 BDCU and the external toolbox motor.

Step 4:External toolbox motor connected to 12V power supply, observe whether the external toolbox motor performs any

action?

Next step

– Yes:

Replace the external toolbox motor. Refer to Replacement Of Toolbox Assembly

– No:

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.26 Fault Of The Sunroof Sunshade

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. KL15 on;

The skylight visor

2. After the body end output power supply, the voltage

B154B3F

1. Wiring harness

opening function failed

collected by the controller does not change;

2. Skyline

sunshade

1. KL15 on;

The awning curtain

3.BDCU

2. After the body end output power supply, the voltage

closing function is

B154C3F

faulty

collected by the controller does not change;

2.Circuit Diagram

Smart Junction

Smart Junction Box - Body

Box - Chassis

Battery

B12-1

B75-29

B07-8

B01-1

Total body power supply

Cockpit domain

BDCU-2

Controller 2

B75-29

B46-2

B46-14

Skylight shade power KL30 P108

B+ L22

The CAR screen wakes up

Awning curtain close switch

the 12V power supply R229

Awning curtain open signal

signal B214

B202

CAR screen power

supply KL30 P314

I_B_LR

I_LR_B

I1_B_IP

I1_IP_B

Open signal input B202

Off signal input B214

KL30 P108

CDC sends 12V power to wake

up the CAR screen R229

Power KL30 P314a

LR05-1

LR05-9

LR05-8

Awning and sunshade

IP02-8

IP02-1

LR05-5

LR05-10

Car screen

Ground Z30e

Ground Z30

IP02-4

Ground Z13a

Ground Z30

Ground Z13

G11

G15

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 BDCU and the sunroof sunshade.

Step 4:Replace the sunroof sunshade. Refer to Replacement Of The Sky Sunshade Assembly

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.27 Left Physical Rearview Mirror Adjustment Signal Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. KL15 on;

The upward

2. After the body end output power supply, the voltage

B154D37

adjustment of the left

collected by the controller does not change;

rearview mirror fails

1. KL15 on;

The downward

2. After the body end output power supply, the voltage

B154E37

adjustment of the left

1. Wiring harness

collected by the controller does not change;

rearview mirror fails

2. Left physical

rearview mirror

1. KL15 on;

The left rearview

3.BDCU

2. After the body end output power supply, the voltage

B154F37

mirror fails to adjust to

collected by the controller does not change;

the left

The left rearview

1. KL15 on;

2. After the body end output power supply, the voltage

mirror fails to adjust to

B155037

collected by the controller does not change;

the right

2.Circuit Diagram

Smart Junction Box - Chassis

Battery

E-axle rear axle

E-axle mid axle

vehicle low

PLC controller

vehicle low voltage

voltage port

port

C95-3

C27-13

C25-13

C3-11

C3-10

KL15 Power-on and

KL30 Power-on and

power-off request

Trailer ABS fault

signal output B614

Differential lock

signal H01a

I7_B_C

B216

B201

I7_C_B

I5_C_B

I9_C_B

Differential lock

signal H01a

signal H01b

I5_B_C

I9_B_C

Differential lock status

I9_B_C

power-off request B201

KL30 Power-on and

KL15 Power-on and

power-off request

feedback H01

Trailer failure

light B614

B216

B64-14

B48-26

B46-1

B46-16

BDCU

B46-7

B46-8

B46-10

B46-21

B46-3

B46-17

B46-6

Right rearview mirror left/down

Adjust right rearview mirror

Left rearview mirror left/down

adjust the common endB208

Rearview mirror

adjust the public end B217

Left rear-view adjustment

heating + B221

mirror to the right B203

Adjust left rearview mirror

Adjust right rearview

upward B206

to right B207

upward B210

Rearview mirror

heating + B221

I_B_RR

I_B_LR

I_B_RR

I_RR_B

I_LR_B

I_RR_B

I_B_LR

I_B_RR

Adjust right rearview mirror

Adjust left rearview mirror

Left rear-view adjustment

left/down adjust the public

mirror to the right B203

Adjust right rearview

Right rearview mirror

Left rearview mirror

left/down adjust the

common endB208

I_LR_B

I_RR_B

to right B207

upward B210

upward B206

Rearview mirror

end B217

heating + B221

RR03-1

RR03-4

RR03-3

LR01-2

LR01-3

LR01-1

LR01-4

RR03-2

LR01-5

RR03-5

Left physical rearview mirror

Right physical rear view mirror

Ground Z39

Ground Z30

G12

G11

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 BDCU and the left physical rearview mirror.

Step 4:Replace the left physical rearview mirror. Refer to Replacement Of The Left Physical Exterior Rearview Mirror

Assembly

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.28 Right Physical Rearview Mirror Adjustment Signal Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. KL15 on;

The right rearview

2. After the body end output power supply, the voltage

mirror fails to adjust

B155137

collected by the controller does not change;

upwards

1. KL15 on;

Right rearview mirror

2. After the body end output power supply, the voltage

B155237

downward adjustment

1. Wiring harness

collected by the controller does not change;

failure

2. Right physical

rearview mirror

1. KL15 on;

The left adjustment of

3.BDCU

2. After the body end output power supply, the voltage

B155337

the right rearview

collected by the controller does not change;

mirror fails

The right rearview

1. KL15 on;

mirror fails to adjust to

2. After the body end output power supply, the voltage

B155437

the right

collected by the controller does not change;

2.Circuit Diagram

Smart Junction Box - Chassis

Battery

E-axle rear axle

E-axle mid axle

vehicle low

PLC controller

vehicle low voltage

voltage port

port

C95-3

C27-13

C25-13

C3-11

C3-10

KL15 Power-on and

KL30 Power-on and

power-off request

Trailer ABS fault

signal output B614

Differential lock

signal H01a

I7_B_C

B216

B201

I7_C_B

I5_C_B

I9_C_B

Differential lock

signal H01a

signal H01b

I5_B_C

I9_B_C

Differential lock status

I9_B_C

power-off request B201

KL30 Power-on and

KL15 Power-on and

power-off request

feedback H01

Trailer failure

light B614

B216

B64-14

B48-26

B46-1

B46-16

BDCU

B46-7

B46-8

B46-10

B46-21

B46-3

B46-17

B46-6

Right rearview mirror left/down

Adjust right rearview mirror

Left rearview mirror left/down

adjust the common endB208

Rearview mirror

adjust the public end B217

Left rear-view adjustment

heating + B221

mirror to the right B203

Adjust left rearview mirror

Adjust right rearview

upward B206

to right B207

upward B210

Rearview mirror

heating + B221

I_B_RR

I_B_LR

I_B_RR

I_RR_B

I_LR_B

I_RR_B

I_B_LR

I_B_RR

Adjust right rearview mirror

Adjust left rearview mirror

Left rear-view adjustment

left/down adjust the public

mirror to the right B203

Adjust right rearview

Right rearview mirror

Left rearview mirror

left/down adjust the

common endB208

I_LR_B

I_RR_B

to right B207

upward B210

upward B206

Rearview mirror

end B217

heating + B221

RR03-1

RR03-4

RR03-3

LR01-2

LR01-3

LR01-1

LR01-4

RR03-2

LR01-5

RR03-5

Left physical rearview mirror

Right physical rear view mirror

Ground Z39

Ground Z30

G12

G11

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 BDCU and the right physical rearview mirror.

Step 4:Replace the right physical rearview mirror. Refer to Replacement Of The Right Physical Exterior Rearview Mirror

Assembly

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.29 Interwheel Lock Solenoid Valve Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. Wiring harness

1. KL15 on;

2. Interlocking

The interwheel

2. After the body end output power supply, the voltage

B15573F

solenoid valve

solenoid valve is faulty

collected by the controller does not change;

between wheels

3.BDCU

2.Circuit Diagram

Right center control switch

Ground Z11

G28

IP21-16

IP21-3

IP21-14

IP21-15

IP21-5

IP21-13

Key backlight + B218d

warning lamps switch

Door lock switch

Lockout light B314

Hazard warning

lamps light B326

message B524

Sliding door

letter B519

B32-26

Hazard

Key backlight - Z12c

hinge

I1_IP_B

I3_IP_B

I1_IP_B

B32-9

I1_B_IP

I3_B_IP

I1_B_IP

The door handle flicks

Hazard warning lamps

Ground Z12

switch message B524

Hazard warning

Door lock switch

Key backlight + B218

the switch B403

lamps light B326

Lockout light B314

letter B519

G14

B47-14

B46-18

B48-3

B47-19

B61-24

B47-26

BDCU

B65-6

B46-14

B47-29

B46-2

B47-30

Solenoid power

Front sunshade closed

Off signal input B214

Front sunshade open

supply B106

Awning curtain open

switch signal B202

B329

B330

I4_B_C

I_B_LR

I4_C_B

Solenoid power

supply B106

I_LR_B

Off signal input B214

Front sunshade

Open signal input

open B330

rise B329

B202

Interwheel lock

C07-1

solenoid valve

C07-2

LR03-2

LR03-1

Ground Z65

LR05-9

LR05-8

Awning and sunshade

Front visor motor

G02

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 BDCU and the inter wheel locking solenoid valve.

Step 4:Check the grounding harness of the inter wheel locking solenoid valve.

Step 5:Replace the inter wheel locking solenoid valve. Refer to Replacement Of Differential Lock Solenoid Valve

Step 6:BDCU rewrite configuration code, software reload, upgrade.

Step 7:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 8:Clear and confirm DTC.

7.8.5.30 Main driver reading light power supply failure

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. Wiring harness

1. KL15 on;

Main driver reading

2. Main driver

2. After the body end output power supply, the voltage

B155D31

light power supply

reading light

collected by the controller does not change;

failure

3.BDCU

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 BDCU and the Main driver reading light.

Step 4:Check the grounding harness of the Main driver reading light.

Step 5:Connect the Main driver reading light to an external 12V power supply, observe if the Main driver reading light is on?

Next step

– Yes:

Replace the Main driver reading light. Refer to Replacement Of Front Reading Light

– No:

Step 6:BDCU rewrite configuration code, software reload, upgrade.

Step 7:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 8:Clear and confirm DTC.

7.8.5.31 Sleeper Reading Light Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. Wiring harness

1.KL15 on;

Sleeper reading lamp

2.Sleeping

2.After the body end output power supply, the voltage

B155E31

power supply failure

reading light

collected by the controller does not change;

3.BDCU

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 BDCU and sleeper reading light.

Step 4:Check the grounding harness of the sleeper reading light.

Step 5:Connect the sleeper reading light to an external 12V power supply and observe if the sleeper reading light is on?

Next step

– Yes:

Replace the sleeper reading light. Refer to Replacement Of Sleeper Reading Light

– No:

Step 6:BDCU rewrite configuration code, software reload, upgrade.

Step 7:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 8:Clear and confirm DTC.

7.8.5.32 Sky Roof Light Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.KL15 on;

1. Wiring harness

The ceiling light power

2.After the body end output power supply, the voltage

B155F31

2.Sky roof light

supply is faulty

collected by the controller does not change;

3.BDCU

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 BDCU and the sky roof light.

Step 4:Check the grounding harness of the sky roof light.

Step 5:Connect the sky roof light to an external 12V power supply and observe if the sky roof light is on?

Next step

– Yes:

Replace the sky roof light. Refer to Replacement Of Lighting Fixtures

– No:

Step 6:BDCU rewrite configuration code, software reload, upgrade.

Step 7:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 8:Clear and confirm DTC.

7.8.5.33 Position Lamp Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.KL15 on;

The power supply of

1. Wiring harness

2.After the body end output power supply, the voltage

the indicator lamp is

B156031

2.Position lamp

collected by the controller does not change;

faulty

3.BDCU

2.Circuit Diagram

Smart Junction

Left combination switch

Box - Chassis

Battery

Wash

Inter-

High

Low

Left

Right

Passing

High

mittent

speed

OFF

turn

AUTO

light

beam

B12-1

3KΩ

2180Ω

Total body power

3KΩ

2.2KΩ 1.5KΩ

680Ω

supply B+ L22

680Ω

150Ω

IP17-7 IP17-6

IP17-9

IP17-5

IP17-10

High beam/passing

Wiper switch signal

light switch B435

Wash switch B401

simulatively B416

Left/right turn

switch B415

B434

B01-1

B07-6

B07-5

Smart Junction

I3_IP_B

Box - Body

I3_B_IP

BDCU-B+1 P105

BDCU-B+2 P106

Wiper switch signal

High beam/passing

light switch B435

Wash switch B401

Left/right turn

simulatively B416

switch B415

B434

B65-3

B65-9

B48-16

B48-34

B48-1

B48-15

B48-35

BDCU

120Ω

B65-7 B65-16

B48-19

B48-39

B48-16

B46-20

B47-2

BCANFD3-L BL03

BCANFD3-H BH03

Ground Z05

Analog switch (light/wip-

Ground Z05

Low light height gear

er) public area B416

Low-beam adjustment

signal output B302

motor + B220

Ground Z05

G27

Power source B220b

Power source B220a

Gear signal B302b

Gear signal B302a

Ground B416

B37-1

B37-2

B37-3

B15-1

B15-3

B15-2

BCANFD3

Right low-beam adjustment motor

Left low-beam adjustment motor

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 BDCU and the position light.

Step 4:Check the grounding harness of the position light.

Step 5:Connect the position light to an external 12V power supply and observe if the position light is on?

Next step

– Yes:

Replace the position light. Refer to Replacement Of Left Front Clearance Lights.Replacement of Right Front

– No:

Clearance Lights

Step 6:BDCU rewrite configuration code, software reload, upgrade.

Step 7:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 8:Clear and confirm DTC.

7.8.5.34 Backlight Power Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.KL15 on;

1. Wiring harness

The backlight lighting

2.After the body end output power supply, the voltage

B156331

2.Backlight

power supply is faulty

collected by the controller does not change;

3.BDCU

2.Circuit Diagram

Left center control switch devices

IP10-4

IP10-1

IP10-2

IP10-5

IP10-6

IP10-9

IP10-8

IP10-3

Left window lift switch

Main drive visor lift

Right window drop

Left window drop

lowering switch B404

Backlight + B218

Main drive shade

Right window lift

switch B506

switch B520

switch B507

switch B521

Ground Z12

B522

I2_IP_B

I3_IP_B

I2_B_IP

I3_B_IP

G14

Left window lift switch

Main drive visor lift

Right window drop

lowering switch B404

Main drive shade

Left window drop

Right window lift

Backlight + B218

switch B506

switch B520

switch B521

switch B507

B522

B61-6

B61-20

B61-21

B61-22

B48-4

B61-7

B46-18

BDCU

120Ω

B46-18

B61-27

B48-18

B48-38

B61-13

Backlight + B218

Backlight +

B218

ESCL-BCAN5-H BH05

ESCL-BCAN5-L BL05

BCANFD2-H BH02

BCANFD2-L BL02

I3_B_IP

I3_IP_B

Backlight power supply PWM+ B218b

Backlight +

B218

Backlight PWM B218c

Block the backlight

Backlight + B218e

PWM B218d

backlight B218a

B85-7

IP10-3

IP16-4

IP21-3

IP09-4

BCANFD2

ESCL-BCAN5

Sleeper

Right center

Sliding door

Left center

switch

Clock-spring

control switch

switch

control switch

devices

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC Confirmation

Step 2:Routine inspection. Refer to Routine Inspection

Step 3:Check the backlight power harness between BDCU and sleeper switch devices, left central control switch group, clock

spring, right central control switch group, and sliding door switch.

Step 4:Replace the backlight. Refer to Replacement Of Sleeper Toolbox.Replacement Of The Left Switch Panel Assembly.

Replacement Of Combination Switch.Replacement Of The Right Switch Panel Assembly.Replacement Of Electric Sliding

Door Switch

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.35 Hazard Alarm Switch Backlight Power Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1. Wiring harness

2.Right central

1.KL15 on;

Danger alarm indicator

control switch

2.After the body end output power supply, the voltage

B156431

key light power supply

(hazard alarm

collected by the controller does not change;

failure

switch backlight)

3.BDCU

2.Circuit Diagram

Left center control switch devices

IP10-4

IP10-1

IP10-2

IP10-5

IP10-6

IP10-9

IP10-8

IP10-3

Left window lift switch

Main drive visor lift

Right window drop

Left window drop

lowering switch B404

Backlight + B218

Main drive shade

Right window lift

switch B506

switch B520

switch B507

switch B521

Ground Z12

B522

I2_IP_B

I3_IP_B

I2_B_IP

I3_B_IP

G14

Left window lift switch

Main drive visor lift

Right window drop

lowering switch B404

Main drive shade

Left window drop

Right window lift

Backlight + B218

switch B506

switch B520

switch B521

switch B507

B522

B61-6

B61-20

B61-21

B61-22

B48-4

B61-7

B46-18

BDCU

120Ω

B46-18

B61-27

B48-18

B48-38

B61-13

Backlight + B218

Backlight +

B218

ESCL-BCAN5-H BH05

ESCL-BCAN5-L BL05

BCANFD2-H BH02

BCANFD2-L BL02

I3_B_IP

I3_IP_B

Backlight power supply PWM+ B218b

Backlight +

B218

Backlight PWM B218c

Block the backlight

Backlight + B218e

PWM B218d

backlight B218a

B85-7

IP10-3

IP16-4

IP21-3

IP09-4

BCANFD2

ESCL-BCAN5

Sleeper

Right center

Sliding door

Left center

switch

Clock-spring

control switch

switch

control switch

devices

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC Confirmation

Step 2:Routine inspection. Refer to Routine Inspection

Step 3:Check the backlight power harness between BDCU and the right central control switch (hazard alarm switch backlight).

Step 4:Check the grounding harness of the right central control switch (hazard alarm switch backlight).

Step 5:Connect the right central control switch (hazard alarm switch backlight) to an external 12V power supply, and observe if

the right central control switch (hazard alarm switch backlight) lights up?

Next step

– Yes:

Replace the right central control switch (hazard alarm switch backlight). Refer to Replacement Of The Right

– No:

Central Control Switch Group

Step 6:BDCU rewrite configuration code, software reload, upgrade.

Step 7:Replace BDCU. Refer to Replacement Of Body Domain Control Uint

Step 8:Clear and confirm DTC.

7.8.5.36 Right window regulator Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.KL15 on;

Secondary car window

2.After the power is supplied from the vehicle body end,

B156B31

rising power supply

1. Wiring harness

there is no change in the voltage collected by the

failure

2.Sliding door

controller.

hinge (right

1.KL15 on;

window regulator)

Secondary car window

2.After the power is supplied from the vehicle body end,

3.BDCU

B156C31

down power supply

there is no change in the voltage collected by the

failure

controller.

2.Circuit Diagram

Right center axle brake pads

Trailer brake pads

From left center

to right front H32

C08-1

C37-1

C08-2

C37-2

Ground Z67

From the middle right

Light rain sensor

to the back right H09

From left center

to right front H12

RR08-4

C26-2

Left center axle brake

Sunlight rainfall LIN

G03

Right rear axle brake pads

Right front axle brake pads

pads

C09-1

C56-1

C09-2

C56-2

B309

C26-1

Front right to

From back right

to back left H10

front left H13

I_RR_B

Left front axle brake pads

Left rear axle brake pads

From back left to

C76-1

C76-2

center left H11

C23-2

C23-1

I_B_RR

Sunlight rainfall LIN

Brake pad wear alarm signal B421

Enter BDCU B421

I4_C_B

B309

I4_B_C

B48-21

B47-9

BDCU

B65-13

B65-14

B65-15

B65-17

B46-24

B46-19

Right turn

signal B224

Right window down + B115

Left window down + B113

Profile light +

Right window up + B117

Profile light + B219

Left window up + B114

B219

I9_B_C

I_B_LR

I1_LR_T

I9_C_B

Steering/braking

positive pole

I_LR_B

I1_T_LR

B224

Profile light +

B219b

B219a

Com-

bina-

C11-3

B90-2

B90-1

tion

marker lamp-rh frt

marker lamp-lh frt

T07-2

T08-2

lamp-

End-outline

rh rr

B32-1

B32-11

C11-1

T07-1

T08-1

Sliding door hinge

Ground Z68

Ground Z16

Left glass regulator

G01

G10

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 BDCU and sliding door hinge (right glass lifter).

Step 4:The sliding door hinge (right glass lifter) is connected to an external 12V power supply. observe the sliding door hinge

(right glass lifter) is functioning properly?

Next step

– Yes:

Replace the sliding door hinge (right window regulator). Refer to Replacement Of The Right Window

– No:

Regulator Assembly

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.37 Left window regulator Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.KL15 on;

Main driving window

2.After the power is supplied from the vehicle body end,

B156931

rising power supply

there is no change in the voltage collected by the

1. Wiring harness

failure

controller.

2.Left window

regulator

1.KL15 on;

Main driving window

3.BDCU

2.After the power is supplied from the vehicle body end,

B156A31

down power supply

there is no change in the voltage collected by the

failure

controller.

2.Circuit Diagram

Right center axle brake pads

Trailer brake pads

From left center

to right front H32

C08-1

C37-1

C08-2

C37-2

Ground Z67

From the middle right

Light rain sensor

to the back right H09

From left center

to right front H12

RR08-4

C26-2

Left center axle brake

Sunlight rainfall LIN

G03

Right rear axle brake pads

Right front axle brake pads

pads

C09-1

C56-1

C09-2

C56-2

B309

C26-1

Front right to

From back right

to back left H10

front left H13

I_RR_B

Left front axle brake pads

Left rear axle brake pads

From back left to

C76-1

C76-2

center left H11

C23-2

C23-1

I_B_RR

Sunlight rainfall LIN

Brake pad wear alarm signal B421

Enter BDCU B421

I4_C_B

B309

I4_B_C

B48-21

B47-9

BDCU

B65-13

B65-14

B65-15

B65-17

B46-24

B46-19

Right turn

signal B224

Right window down + B115

Left window down + B113

Profile light +

Right window up + B117

Profile light + B219

Left window up + B114

B219

I9_B_C

I_B_LR

I1_LR_T

I9_C_B

Steering/braking

positive pole

I_LR_B

I1_T_LR

B224

Profile light +

B219b

B219a

Com-

bina-

C11-3

B90-2

B90-1

tion

marker lamp-rh frt

marker lamp-lh frt

T07-2

T08-2

lamp-

End-outline

rh rr

B32-1

B32-11

C11-1

T07-1

T08-1

Sliding door hinge

Ground Z68

Ground Z16

Left glass regulator

G01

G10

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 BDCU and the left window regulator.

Step 4:Connect the left glass lifter to an external 12V power supply and observe if the left glass lifter is functioning properly?

Next step

– Yes:

Replace the left window regulator. Refer to Replacement Of Left Window Regulator Assembly

– No:

Step 5:BDCU rewrite configuration code, software reload, upgrade.

Step 6:Replace the BDCU. Refer to Replacement Of Body Domain Control Uint

Step 7:Clear and confirm DTC.

7.8.5.38 BInspection Of CANFD3 Bus Network Integrity

Step 1

Check the terminal resistance of BCAND3 bus.

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

BCANFD3(H) and

Resistance:55 - 63 Ω

BCANFD3(L)

Confirm the measured values meet the standards.

Up to step 6.

Yes

Step 2

Check the bus voltage of BCAND3.

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

BCANFD3 (H) and

Voltage:2.5 - 3.5 V

vehicle grounding

BCANFD3 (L) and

Voltage:1.5 - 2.5 V

vehicle 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

BCANFD3 (H) and

Voltage:2.5 - 3.5 V

vehicle grounding

BCANFD3 (L) and

Voltage:1.5 - 2.5 V

vehicle 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 BCAND3 bus harness.

Perform vehicle power-off operation.

Disconnect all module harness connectors on the

BCAND3 bus.

Measure the BCAND3 bus resistance between each

module and the vehicle domain controller in sequence

to see if it is normal.

Standard resistance:less than 1 Ω

Measure the ground resistance of the BCAND3 bus is

normal.

Standard resistance:10K Ω or higher

Perform vehicle power on operation.

Measure the BCAND3 bus is short circuited to the power

supply.

Standard voltage:0 V

Confirm the measured values meet the standards.

Repair or replace the BCAND3 bus.

Yes

Disconnect the modules on the BCAND3 bus in sequence and observe the bus communication voltage/

Step 7

resistance.

Disconnect the modules on the BCAND3 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.

7.8.5.39 Inspection Of BCAN5 Bus Network Integrity

Step 1

Check the terminal resistance of BCAN5 bus.

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

BCAN5(H) and BCAN5

Resistance:55 - 63 Ω

(L)

Confirm the measured values meet the standards.

Up to step 6.

Yes

Step 2

Check the BCAN5 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

BCAN5 (H) and vehicle

Voltage:2.5 - 3.5 V

grounding

BCAN5 (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

BCAN5 (H) and vehicle

Voltage:2.5 - 3.5 V

grounding

BCAN5 (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 BCAN5 bus harness.

Perform vehicle power-off operation.

Disconnect all module harness connectors on the

BCAN5 bus.

Measure the BCAN5 bus resistance between each

module and the vehicle domain controller in sequence

to see if it is normal.

Standard resistance:less than 1 Ω

Measure the ground resistance of BCAN5 bus is

normal.

Standard resistance:10K Ω or higher

Perform vehicle power on operation.

Measure the BCAN5 bus is short circuited to the power

supply.

Standard voltage:0 V

Confirm the measured values meet the standards.

Repair or replace the BCAN5 bus.

Yes

Step 7

Disconnect the modules on the BCAN5 bus in sequence and observe the bus communication voltage/resistance.

Disconnect the modules on the BCAN5 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.

7.8.5.40 Inspection Of BCAN6 Bus Network Integrity

Step 1

Check the terminal resistance of BCAN6 bus.

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

BCAN6(H) and BCAN6

Resistance:55 - 63 Ω

(L)

Confirm the measured values meet the standards.

Up to step 6.

Yes

Step 2

Check the BCAN6 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

BCAN6 (H) and vehicle

Voltage:2.5 - 3.5 V

grounding

BCAN6 (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

BCAN6 (H) and vehicle

Voltage:2.5 - 3.5 V

grounding

BCAN6 (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 BCAN6 bus harness.

Perform vehicle power-off operation.

Disconnect all module harness connectors on the

BCAN6 bus.

Measure the BCAN6 bus resistance between each

module and the sliding door hinge(door handle) in

sequence to see if it is normal.

Standard resistance:less than 1 Ω

Measure the ground resistance of BCAN6 bus is

normal.

Standard resistance:10K Ω or higher

Perform vehicle power on operation.

Measure the BCAN6 bus is short circuited to the power

supply.

Standard voltage:0 V

Confirm the measured values meet the standards.

Repair or replace the BCAN6 bus.

Yes

Step 7

Disconnect the modules on the BCAN6 bus in sequence and observe the bus communication voltage/resistance.

Disconnect the modules on the BCAN6 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.

7.8.5.41 BCAN7 Bus Network Integrity Check

Step 1

Check the BCAN7 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

BCAN7(H) and BCAN7

Resistance:55 - 63 Ω

(L)

Confirm the measured values meet the standards.

Up to step 6.

Yes

Step 2

Check the BCAN7 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

BCAN7(H) and vehicle

Voltage:2.5 - 3.5 V

grounding

BCAN7(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

BCAN7(H) and vehicle

Voltage:2.5 - 3.5 V

grounding

BCAN7(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 BCAN7 bus harness.

Perform vehicle power-off operation.

Disconnect all module harness connectors on the

BCAN7 bus.

Measure the ADCAN1 bus resistance between each

module and the body domain control uint sequentially

to see if it is normal.

Standard resistance:less than 1 Ω

Measure the resistance of BCAN7 bus to ground is

normal.

Standard resistance:10K Ω or higher

Perform vehicle power on operation.

Measure the BCAN7 bus is short circuited to the power

supply.

Standard voltage:0 V

Confirm the measured values meet the standards.

Repair or replace the BCAN7 bus.

Yes

Step 7

Disconnect the modules on the BCAN7 bus in sequence and observe the bus communication voltage/resistance.

Disconnect the modules on the BCAN7 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.

7.8.6 Dismantling and Installation

7.8.6.1 Replacement of BCM

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 the IP left upper trim panel assembly.

Disconnect 7 harness connectors of the BCM.

Remove 4 fixing bolts of the BCM, and remove the BCM.

Installation Procedures

Move the BCM to the mounting position.

Install 4 fixing bolts of the BCM.

Torque:(6.5 +/- .75) ft lbs

Connect 7 harness connectors of the BCM.

caution

The harness is firmly connected following the

principal of "insert until a click is heard for

confirmation".

Install the IP left upper trim panel assembly.

Connect the battery negative cable.

Close the front flip cover plate.

Close the door.

caution

After replacing the BCM, it is necessary to connect a

scan tool for flashing, read VIN, and write the

configuration word.

7.8.6.2 Replacement of Pillar Lock

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 the combination switch upper shield assembly.

Remove the combination switch lower shield.

Disconnect 1 harness connector of the pillar lock.

Drill one hole on the anti-theft bolt using a drill bit with a

diameter of (3-4) mm.

Remove 2 anti-theft bolts with a screw extractor.

Remove the pillar lock.

Installation Procedures

Move the pillar lock to the mounting position.

Install 2 anti-theft bolts of the pillar lock.

Torque: (17 +/- 2) ft lbs

Connect 1 harness connector of the pillar lock.

caution

The harness is firmly connected following the

principal of "insert until a click is heard for

confirmation".

Install the combination switch lower shield.

Install the combination switch upper shield assembly.

Connect the battery negative cable.

Close the front flip cover plate.

Close the door.

caution

The anti-theft bolt is a disposable part and shall not

be reused.

When reinstalling the pillar lock, the anti-theft bolt

needs to be replaced with a new one, and the upper

part of the anti-theft bolt needs to be twisted off

during installation.

7.8.6.3 Replacement of NFC Antenna

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 the IP right upper trim panel assembly.

Disconnect 1 harness connector of the NFC antenna.

Remove 3 fixing screws of the NFC antenna.

Remove the NFC antenna.

Installation Procedures

Move the NFC antenna to the mounting position.

Install 3 fixing screws of the NFC antenna.

Connect 1 harness connector of the NFC antenna.

caution

The harness is firmly connected following the

principal of "insert until a click is heard for

confirmation".

Install the IP right upper trim panel assembly.

Connect the battery negative cable.

Close the front flip cover plate.

Close the door.

7.8.6.4 Replacement of Wireless Charging Module

Module

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 the IP right upper trim panel assembly.

Remove 4 fixing screws of the wireless charging module

with a bracket.

Remove 4 fixing bolts of the wireless charging module.

Remove the wireless charging module.

Installation Procedures

Move the wireless charging module to the mounting

position.

Install 4 fixing bolts of the wireless charging module.

Torque:(4.5 +/- .75) ft lbs

Install 4 fixing screws of the wireless charging module with

a bracket.

Install the IP right upper trim panel assembly.

Connect the battery negative cable.

Close the front flip cover plate.

Close the door.

7.8.6.5 Replacement of DCM

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 the right sill molding assembly.

Remove the door opening sealing strip assembly.

Remove the safety hammer fixing bracket.

Remove the rear boarding handrail assembly.

Remove the SSM.

Remove the right rear side wall protective plate assembly.

Disconnect 3 harness connector of the DCM.

Remove 2 fixing bolts of the DCM.

Remove the DCM.

Installation Procedures

Move the DCM to the mounting position.

Install 2 fixing bolts of the DCM.

Torque: (6.5 +/- .75) ft lbs

Connect 3 harness connector of the DCM.

caution

The harness is firmly connected following the

principal of "insert until a click is heard for

confirmation".

Install the right rear side wall protective plate assembly.

Install the SSM.

Install the rear boarding handrail assembly.

Install the safety hammer fixing bracket.

Install the door opening sealing strip assembly.

Install the right sill molding assembly.

Connect the battery negative cable.

Close the front flip cover plate.

Close the door.

caution

After replacing the DCM, it is necessary to connect

a scan tool for flashing.

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