7 Automotive Electrical Appliances / 7.7 Switch Device | PDF pages 1514-1541

7.7 Switch Device

7.7.1 Decomposition Diagram

7.7.1.1 Decomposition Diagram

Sleeper Switch Devices

Lh Switch Group at Instrument Panel

Power Sliding Door

Switch-Locker Lighting

10.

Rh Switch Group at Instrument Panel

Self-Tapping Screw

11.

Clock-Spring

Hex Socket Set Screw

12.

Multi-Function Switch

Hex Socket Set Screw

Multi-Function Switch Bracket

7.7.2 System Schematic Diagram

7.7.2.1 Electrical Schematic Diagram

Right combination switch - gear position

Sleeper switch devices

7.7.3 Diagnostic Information and Steps

7.7.3.1 Diagnostic Description

Before diagnosing faults in the switch device, it is important to understand and familiarize oneself with the working principle of the

switch device before starting the system diagnosis. This will help determine the correct fault diagnosis steps when a fault occurs,

and more importantly, it will help determine the situation described by the customer belongs to normal operation. Any fault

diagnosis of switch devices 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.

7.7.3.2 Routine Inspection

• Check for aftermarket installation devices that may affect the operation of the switchgear system, ensuring that these devices

do not affect the operation of the switchgear system.

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

malfunction.

7.7.3.3 Fault Symptom Table

Symptom

Suspected Faulty Project

Measures

Check the gear shift switch and replace

1.Shift switch stuck or damaged

it if necessary. Refer to Replacement Of

The vehicle cannot shift gears

Combination Switch

2. Shift switch malfunction

Refer to Shift Switch Power Failure

7.7.3.4 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 is any fault code output from the system.

– Yes:Diagnose based on the output fault code.

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

7.7.3.5 List Of Diagnostic Trouble Codes (DTC)

GSM

Fault Description

Exclusion Method

Fault Code

Battery voltage is too high

B111717

Refer to Shift Switch Power Fault

Battery voltage is too low

B111716

U008E88

PCAN4 BusOff

U019887

Lost communication with TGW

Refer to Shift Switch Communication

Fault

U015687

Communication with CDCU is lost

U012287

Communication with VDC is lost

P280096

Shift switch sensor malfunction

Refer to Shift Switch Internal Fault

Gear shift lever jamming failure

P280171

SSM

Fault Description

Exclusion Method

Fault Code

Power supply voltage below threshold

B111716

Refer to Sleeper Switch Devices Power

Fault

Power supply voltage above threshold

B111717

Fault Description

Exclusion Method

Fault Code

U007E88

BCANFD3 BusOff

U019887

lost communication with T-BOX

U014087

lost communication with BDCU

U016487

lost communication with A/C

Refer to Sleeper Switch Devices

Communication Fault

U015687

lost communication with CDCU

U012287

lost communication with VDC

CANFD3 network management limp

U220A00

home

7.7.3.6 Shift Switch Power Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Battery voltage is too

1. Main battery

Voltage > 32V, t > 2000ms

B111717

high

2. Low voltage

charging system

Battery voltage is too

3. Wiring harness

Voltage < 18V, t > 2000ms

B111716

low

4.Shift switch

2.Circuit Diagram

Smart Junction Box - Chassis

Battery

B12-1

C4-21

Total body power

Middle and rear axle MCU-KL30 O421

supply B+ L22

VDC-1

BDCU-4

B48-26

C93-97

status feedback H01

Smart Junction

Differential lock

Box - Body

B01-1

MCU4-CAN

drive wake up the power supply E146

The PDU, TCU, middrive, and rear

B07-2

B07-16

switch/parking

power supply

Switch class

KL30 shift

switch P116

I7_B_C

KL15 Power

supply P102

I7_C_B

switch - Shift

Combination

-KL30 P116b

Differential lock feedback signal

MCU power supply KL30 O421b

I1_B_IP

H01b

MCU4-CAN-H PH04e

MCU4-CANL PL04e

I1_IP_B

switch - Shift

KL15 Power

Combination

-KL30 P116b

supply P102

KL15 Power

Power KL30

supply P102a

C25-17

C25-1

C25-13

C25-5

C25-6

P116b

E-axle rear axle vehicle low voltage port

IP18-3

IP18-9

C25-20

C25-3

C25-4

MCU3-CAN-H PH04h

MCU3-CAN-L PL04h

MCU3-CAN-H PH04f

MCU3-CANL PL04f

MCU Power Supply - Z66

Shift switch

120Ω

IP18-8

IP18-2

IP18-1

PCAN4-H PH04d

PCAN4-L PL04d

Ground Z12d

C114-2

C114-1

CAN resistance -120Ω

MCU3-CAN

G02

G14

PCAN4

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 the shift switch?

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

– Yes:

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

Next step

– No:

Step 4:Check the power supply and grounding harness of the gear shift switch.

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

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

Step 7:Clear and confirm DTC.

7.7.3.7 Shift Switch Communication Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.BUSOFF lasts more than 8 times

U008E88

PCAN4 BusOff

2.The current voltage is 18~32V

1.KL15 ON;

2.The current voltage is 18~32V

Lost communication

U019887

3.When GSM loses communication with TGW

with TGW

(0x18FEE6EEx) for more than 5000ms, GSM sets the

current DTC

1. Wiring harness

1.KL15 ON;

2. Shift switch

2.The current voltage is 18~32V

Communication with

U015687

3.When GSM loses communication with CDCU

CDCU is lost

(0x18FEC1EEx) for more than 5000 ms, GSM sets the

current DTC

1.KL15 ON;

2.The current voltage is 18~32V 3.When GSM loses

Communication with

U012287

communication with VDC (0x18FEF100x) for more than

VDC is lost

1000 ms, GSM sets the current DTC

2.Circuit Diagram

Smart Junction Box - Chassis

Battery

B12-1

C4-21

Total body power

Middle and rear axle MCU-KL30 O421

supply B+ L22

VDC-1

BDCU-4

B48-26

C93-97

status feedback H01

Smart Junction

Differential lock

Box - Body

B01-1

MCU4-CAN

drive wake up the power supply E146

The PDU, TCU, middrive, and rear

B07-2

B07-16

switch/parking

power supply

Switch class

KL30 shift

switch P116

I7_B_C

KL15 Power

supply P102

I7_C_B

switch - Shift

Combination

-KL30 P116b

Differential lock feedback signal

MCU power supply KL30 O421b

I1_B_IP

H01b

MCU4-CAN-H PH04e

MCU4-CANL PL04e

I1_IP_B

switch - Shift

KL15 Power

Combination

-KL30 P116b

supply P102

KL15 Power

Power KL30

supply P102a

C25-17

C25-1

C25-13

C25-5

C25-6

P116b

E-axle rear axle vehicle low voltage port

IP18-3

IP18-9

C25-20

C25-3

C25-4

MCU3-CAN-H PH04h

MCU3-CAN-L PL04h

MCU3-CAN-H PH04f

MCU3-CANL PL04f

MCU Power Supply - Z66

Shift switch

120Ω

IP18-8

IP18-2

IP18-1

PCAN4-H PH04d

PCAN4-L PL04d

Ground Z12d

C114-2

C114-1

CAN resistance -120Ω

MCU3-CAN

G02

G14

PCAN4

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC Confirmation

Step 2:Routine inspection. Refer to Routine Inspection

Step 3:Check the PCAN4 bus communication harness. Refer to Inspection Of PCAN4 Bus Network Integrity

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

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

Step 6:Clear and confirm DTC.

7.7.3.8 Shift Switch Internal Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

1.Gear sensor failure lasts for 3S

Shift switch sensor

P280096

2.The current voltage is 18~32V

malfunction

1.Shift switch

1.The gear stays in a non-default position for 60

Gear shift lever

seconds

P280171

jamming failure

2.The current voltage is between 18 and 32V

2. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC Confirmation

Step 2:Routine inspection. Refer to Routine Inspection

Step 3:Rewrite the configuration code for the gear shift switch, reload the software, and upgrade.

Step 4:Replace the gear shift switch. Refer to Replacement Of Combination Switch

Step 5:Clear and confirm DTC.

7.7.3.9 Sleeper Switch Devices Power Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

Low Battery Voltage

Voltage < 18V, t > 500ms

1. Main battery

B111716

2. Low voltage

charging system

3. Wiring harness

High battery voltage

Voltage > 32V, t > 500ms

B111717

4.Sleeper switch

devices

2.Circuit Diagram

3. Diagnostic Steps

Step 1:DTC confirmation. Refer to DTC Confirmation

Step 2:Routine inspection. Refer to Routine Inspection

Step 3:Check if there are any other module power fault codes besides the sleeper switch devices?

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

– Yes:

Check the low-voltage charging system. Refer to Inspection Of The Main Battery

Next step

– No:

Step 4:Check the power and grounding harnesses of the sleep switch devices.

Step 5:Sleep switch devices rewrite configuration code, software reload, upgrade.

Step 6:Replace the sleeper switch devices. Refer to Replacement Of Sleep Switch Devices

Step 7:Clear and confirm DTC.

7.7.3.10 Sleeper Switch Devices Communication Fault

1. DTC Monitoring Logic

Description

DTC Trigger Conditions

Faulty Part

DTC Code

eight times in a row

U007E88

BCANFD3 BusOff

Lost Communication

0x18FEE6EE(T>50ms:5*T;or else:250ms)

U019887

With T-Box

lost communication

0x14FD1721(T>50ms:5*T;or else:250ms)

U014087

with BDCU

lost communication

0x18FF2419(T>50ms:5*T;or else:250ms)

1. Wiring harness

U016487

with A/C

2.Sleeper switch

Lost Communication

devices

0x18FEC1EE(T>50ms:5*T;or else:250ms)

U015687

With CDCU

Lost Communication

0x18FEF100(T>50ms:5*T;or else:250ms)

U012287

With VDC

CANFD3 network

2 seconds in limphome state

U220A00

management limp

home

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 BCANFD3 bus communication harness. Refer to BInspection Of CANFD3 Bus Network Integrity

Step 4:Rewrite the configuration code, reload the software, and upgrade the sleep switch devices.

Step 5:Replace the sleeper switch devices. Refer to Replacement Of Sleep Switch Devices

Step 6:Clear and confirm DTC.

7.7.3.11 Inspection Of PCAN4 Bus Network Integrity

Step 1

Check the PCAN4 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

PCAN4(H) and PCAN4

Resistance:55 - 63 Ω

(L)

Confirm the measured values meet the standards.

Up to step 6.

Yes

Step 2

Check the PCAN4 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

PCAN4 (H) and vehicle

Voltage:2.5 - 3.5 V

grounding

PCAN4 (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

PCAN4 (H) and vehicle

Voltage:2.5 - 3.5 V

grounding

PCAN4 (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 PCAN4 bus harness.

Perform vehicle power-off operation.

Disconnect all module harness connectors on the

PCAN4 bus.

Measure the PCAN4 bus resistance between each

module and the shift switch in sequence to see if it is

normal.

Standard resistance:less than 1 Ω

Measure the ground resistance of PCAN4 bus is

normal.

Standard resistance:10K Ω or higher

Perform vehicle power on operation.

Measure the PCAN4 bus is short circuited to the power

supply.

Standard voltage:0 V

Confirm the measured values meet the standards.

Repair or replace PCAN4 bus.

Yes

Step 7

Disconnect the modules on the PCAN4 bus in sequence and observe the bus communication voltage/resistance.

Disconnect the modules on the PCAN4 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.

7.7.4 Dismantling and Installation

7.7.4.1 Replacement of Left Central Control Switch Group

Switch Group

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 left switch panel assembly.

Remove 3 fixing screws of the left central control switch

group.

Remove the left central control switch group.

Installation Procedures

Move the left central control switch group to the mounting

position.

Install 3 fixing screws of the left central control switch

group.

Install the left switch panel assembly.

Connect the battery negative cable.

Close the front flip cover plate.

Close the door.

7.7.4.2 Replacement of Right Central Control Switch Group

Switch Group

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 switch panel assembly.

Remove 4 fixing screws of the right central control switch

group.

Remove the right central control switch group.

Installation Procedures

Move the right central control switch group to the

mounting position.

Install 4 fixing screws of the right central control switch

group.

Install the right switch panel assembly.

Connect the battery negative cable.

Close the front flip cover plate.

Close the door.

7.7.4.3 Replacement of SSM

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.

Pry off the SSM.

Disconnect 1 harness connector of the SSM.

Remove the SSM.

Installation Procedures

Move the SSM to the mounting position.

Connect 1 harness connector of the SSM.

caution

The harness is firmly connected following the

principal of "insert until a click is heard for

confirmation".

Install the SSM.

Connect the battery negative cable.

Close the front flip cover plate.

Close the door.

caution

After part replacement, it is necessary to rewrite the

configuration word.

7.7.4.4 Replacement of Electric Sliding Door Switch

Switch

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.

Pry off the electric sliding door switch.

Disconnect 1 harness connector of the electric sliding door

switch.

Remove the electric sliding door switch.

Installation Procedures

Move the electric sliding door switch to the mounting

position.

Connect1 harness connector of the electric sliding door

switch.

caution

The harness is firmly connected following the

principal of "insert until a click is heard for

confirmation".

Install the electric sliding door switch.

Connect the battery negative cable.

Close the front flip cover plate.

Close the door.

7.7.4.5 Replacement of Combination Switch

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.

Remove the driver horn cover assembly.

Remove the steering wheel assembly.

Remove the clock spring.

Disconnect 2 harness connectors of the combination

switch.

Detach the combination switch clip.

Remove the combination switch.

Installation Procedures

Move the combination switch to the mounting position.

Connect the combination switch clip.

Connect 2 harness connectors of the combination switch.

caution

The harness is firmly connected following the

principal of "insert until a click is heard for

confirmation".

Install the clock spring.

Install the steering wheel assembly.

Install the driver horn cover assembly.

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.

7.7.4.6 Replacement of Clock Spring

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.

Remove the driver horn cover assembly.

Remove the steering wheel assembly.

Disconnect 1 harness connector of the clock spring.

Remove the clock spring.

Installation Procedures

Move the clock spring to the mounting position.

Install 1 harness connector of the clock spring.

caution

The harness is firmly connected following the

principal of "insert until a click is heard for

confirmation".

Install the steering wheel assembly.

Install the driver horn cover assembly.

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.

7.7.4.7 Replacement of Storage Compartment Lamp Switch

Lamp Switch

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 1 fixing screw of the storage compartment lamp

switch.

Disconnect 1 harness connector of the storage

compartment lamp switch.

Remove the storage compartment lamp switch.

Installation Procedures

Move the storage compartment lamp switch to the

mounting position.

Connect 1 harness connector of the storage compartment

lamp switch.

caution

The harness is firmly connected following the

principal of "insert until a click is heard for

confirmation".

Install 1 fixing screw of the storage compartment lamp

switch.

Connect the battery negative cable.

Close the front flip cover plate.

Close the door.

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