Rear Side Switch Module LIN Communication Malfunction

MULTIPLEX COMMUNICATION: LIN COMMUNICATION SYSTEM: Rear Side Switch Module LIN Communication Malfunction

Rear Side Switch Module LIN Communication Malfunction

DESCRIPTION

The rear power seat module switch monitors the LIN communication bus between the components related to the switches on the rear seat.
HINT: DTC U0211, U0246, U1130 and U1131 are output simultaneously when: 1) there is an open or short in the LIN communication bus between the switches on the rear seat, and 2) their LIN communication bus stops.

WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE:
When using the Techstream with the engine switch off to troubleshoot:

Connect the Techstream to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.

PROCEDURE

1. CLEAR DTC
(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.

2. CHECK FOR DTC
(a) Check for DTC Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT: *: W/ Rear Climate Control Seat System

C -- USE SIMULATION METHOD TO CHECK
B -- GO TO DTC CHART LIN Communication System
A -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (REAR POWER SEAT MODULE SWITCH - POSITION CONTROL ECU LH)




(a) Disconnect the r2*1 or S15*2 module switch connectors.
HINT:
*1: except Ottoman
*2: for Ottoman
(b) Disconnect the f25 ECU connector.
(c) Measure the resistance and voltage according to the value(s) in the table below.
Standard resistance:

except Ottoman:





for Ottoman:





Standard voltage:

except Ottoman:





for Ottoman:





NG -- CLEAR DTC
OK -- REPLACE REAR POWER SEAT MODULE SWITCH
4. CLEAR DTC
(a) Reconnect the r2*1 or S15*2 module switch connectors.
HINT:
*1: except Ottoman
*2: for Ottoman
(b) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.

5. CHECK FOR DTC
(a) Disconnect the f25 ECU connector.
(b) Recheck for DTC Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT: *: W/ Rear Climate Control Seat System

B -- REPLACE POSITION CONTROL ECU RH
A -- Continue to next step.

6. CLEAR DTC
(a) Reconnect the f25 ECU connector.
(b) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.

7. CHECK FOR DTC
(a) Disconnect the f25 ECU connector.
(b) Recheck for DTC Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT: *: W/ Rear Climate Control Seat System

C -- REPAIR OR REPLACE HARNESS OR CONNECTOR
B -- REPLACE POSITION CONTROL ECU LH
A -- Continue to next step.

8. CLEAR DTC
(a) Reconnect the f25 ECU connector.
(b) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.

9. CHECK FOR DTC
(a) Disconnect the f8 ECU connector.
(b) Recheck for DTC Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT:
*: W/ Rear Climate Control Seat System

B -- REPLACE REAR SEAT CLIMATE CONTROL ECU RH
A -- Continue to next step.

10. CLEAR DTC
(a) Reconnect the f8 ECU connector.
(b) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.

11. CHECK FOR DTC
(a) Disconnect the f28 ECU connector.
(b) Recheck for DTC Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT: *: W/ Rear Climate Control Seat System

B -- REPLACE REAR SEAT CLIMATE CONTROL ECU LH
A -- REPAIR OR REPLACE HARNESS OR CONNECTOR