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 power 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 tester 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





C -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

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 z54*1 or S15*2 module switch connector.

*1: except 4-Passenger with Ottoman

*2: for 4-Passenger with Ottoman





(b) Disconnect the f39 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





E -- REPLACE REAR POWER SEAT MODULE SWITCH Disassembly

D -- REPLACE REAR POWER SEAT MODULE SWITCH Disassembly

C -- REPLACE REAR POWER SEAT MODULE SWITCH Disassembly

B -- REPLACE REAR POWER SEAT MODULE SWITCH Removal
A -- Continue to next step.

4. CLEAR DTC

(a) Reconnect the z54*1 or S15*2 module switch connectors.

*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 f39 ECU connector.

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

Result





C -- REPLACE POSITION CONTROL ECU RH Disassembly

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

6. CLEAR DTC

(a) Reconnect the f39 ECU connector.

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

NEXT -- Continue to next step.

7. CHECK FOR DTC

(a) Disconnect the f43 ECU connector.

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

Result





C -- REPLACE POSITION CONTROL ECU LH Disassembly

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

8. CLEAR DTC

(a) Reconnect the f43 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





D -- REPLACE REAR SEAT CLIMATE CONTROL ECU RH Removal

C -- REPLACE REAR SEAT CLIMATE CONTROL ECU RH Disassembly

B -- REPLACE REAR SEAT CLIMATE CONTROL ECU RH Disassembly
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 f13*1 or f28*2 ECU connector.

*1: w/ Seat Heater System

*2: w/ Climate Control Seat System

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

Result





D -- REPLACE REAR SEAT CLIMATE CONTROL ECU LH Disassembly

C -- REPLACE REAR SEAT CLIMATE CONTROL ECU LH Disassembly

B -- REPLACE REAR SEAT CLIMATE CONTROL ECU LH Disassembly

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR