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

NOTICE:
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





B -- GO TO DTC CHART LIN Communication System

C -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting
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 4-Passenger with Ottoman

*2: for 4-Passenger with Ottoman





(b) Disconnect the f40 ECU connector.

(c) Measure the resistance and voltage according to the value(s) in the table below.

Standard resistance:

except 4-Passenger with Ottoman:





for 4-Passenger with Ottoman:





Standard voltage:

except 4-Passenger with Ottoman:





for 4-Passenger with Ottoman:





Result





B -- REPLACE REAR POWER SEAT MODULE SWITCH Disassembly

C -- CLEAR DTC

A -- REPLACE REAR POWER SEAT MODULE SWITCH Disassembly

4. CLEAR DTC

(a) Reconnect the r2*1 or S15*2 module switch connectors.

HINT
*1: except 4-Passenger with Ottoman

*2: for 4-Passenger with Ottoman

(b) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.

5. CHECK FOR DTC

(a) Disconnect the f37 ECU connector.

(b) Recheck for DTC Reading and Clearing Diagnostic Trouble Codes.

Result





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

6. CLEAR DTC

(a) Reconnect the f37 ECU connector.

(b) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.

7. CHECK FOR DTC

(a) Disconnect the f40 ECU connector.

(b) Recheck for DTC Reading and Clearing Diagnostic Trouble Codes.

Result





B -- REPLACE POSITION CONTROL ECU LH

C -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- Continue to next step.

8. CLEAR DTC

(a) Reconnect the f40 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





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*1 or f13*2 ECU connector.

HINT
*1: w/ Climate Control Seat System

*2: w/ Seat Heater System

(b) Recheck for DTC Reading and Clearing Diagnostic Trouble Codes.

Result





B -- REPLACE REAR SEAT CLIMATE CONTROL ECU LH

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR