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Home >> Lexus >> 2010 >> LS 460 AWD V8-4.6L (1UR-FSE) >> Repair and Diagnosis >> Body and Frame >> Seats >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Climate Control Seat System >> Climate Control System Does Not Operate on Passenger Side

Climate Control System Does Not Operate on Passenger Side





SEAT: CLIMATE CONTROL SEAT SYSTEM: Climate Control System does not Operate on Passenger Side
- Climate Control System does not Operate on Passenger Side

DESCRIPTION

When the seat climate switch is operated, the seat climate control ECU receives the signal and operates the air seat.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CONFIRM PROBLEM SYMPTOMS

Result





D -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly

C -- CONFIRM TROUBLE AREAS

B -- CONFIRM TROUBLE AREAS
A -- Continue to next step.

2. CONFIRM TROUBLE AREAS

Result





C -- CHECK SEAT CLIMATE CONTROL CONTROLLER RH

B -- CHECK SEAT CLIMATE CONTROL CONTROLLER RH
A -- Continue to next step.

3. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Select the Active Test, use the Techstream to generate a control command, and then check the blower motor function.

Front Right Seat A/C





OK:

Blower motor operates normally

NG -- CHECK SEAT CLIMATE CONTROL ECU
OK -- Continue to next step.

4. CHECK SEAT CLIMATE CONTROL ECU

(a) Measure the voltage according to the value(s) in the table below.





Standard voltage:





NG -- INSPECT CLIMATE CONTROL SWITCH RH

OK -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly

5. CHECK SEAT CLIMATE CONTROL ECU

(a) Disconnect the e1 blower connector.





(b) Measure the voltage according to the value(s) in the table below.

Standard voltage:





NG -- CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL BLOWER)

OK -- REPLACE SEAT CLIMATE CONTROL BLOWER RH Disassembly

6. INSPECT CLIMATE CONTROL SWITCH RH

(a) Disconnect the L68 switch connector.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPLACE CLIMATE CONTROL SWITCH RH Removal
OK -- Continue to next step.

7. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - CLIMATE CONTROL SWITCH)

(a) Disconnect the e4 ECU connector.





(b) Disconnect the L68 switch connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly

8. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL BLOWER)

(a) Disconnect the e4 ECU connector.





(b) Disconnect the e1 blower connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly

9. CHECK SEAT CLIMATE CONTROL CONTROLLER RH

(a) Temporarily replace the seat climate control controller with a new or normally functioning one.

(b) Check the climate control seat function is normal.

OK:

Climate control seat function is normal

NG -- CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL CONTROLLER)

OK -- REPLACE SEAT CLIMATE CONTROL CONTROLLER RH Disassembly

10. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL CONTROLLER)

(a) Disconnect the e4 ECU connector.





(b) Disconnect the e2 controller connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly

11. CHECK SEAT CLIMATE CONTROL CONTROLLER RH

(a) Temporarily replace the seat climate control controller with a new or normally functioning one.

(b) Check the climate control seat function is normal.

OK:

Climate control seat function is normal

NG -- CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL CONTROLLER)

OK -- REPLACE SEAT CLIMATE CONTROL CONTROLLER RH Disassembly

12. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL CONTROLLER)

(a) Disconnect the e4 ECU connector.





(b) Disconnect the e21 controller connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly

13. CONFIRM TROUBLE AREAS

Result





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

14. CHECK SEAT CLIMATE CONTROL ECU

(a) Measure the voltage according to the value(s) in the table below.





Standard voltage:





NG -- INSPECT CLIMATE CONTROL SWITCH RH

OK -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly

15. INSPECT CLIMATE CONTROL SWITCH RH

(a) Disconnect the L68 switch connector.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPLACE CLIMATE CONTROL SWITCH RH Removal
OK -- Continue to next step.

16. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - CLIMATE CONTROL SWITCH)

(a) Disconnect the e4 ECU connector.





(b) Disconnect the L68 switch connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly

17. CONFIRM TROUBLE AREAS

Result





C -- REPLACE FRONT SEATBACK COVER RH Removal

B -- REPLACE FRONT SEAT CUSHION COVER RH Removal
A -- Continue to next step.

18. CHECK SEAT CLIMATE CONTROL ECU

(a) Measure the voltage according to the value(s) in the table below.





Standard voltage:





NG -- INSPECT CLIMATE CONTROL SWITCH RH

OK -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly

19. INSPECT CLIMATE CONTROL SWITCH RH

(a) Disconnect the L68 switch connector.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPLACE CLIMATE CONTROL SWITCH RH Removal
OK -- Continue to next step.

20. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - CLIMATE CONTROL SWITCH)

(a) Disconnect the e4 ECU connector.





(b) Disconnect the L68 switch connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

21. INSPECT FRONT SEAT CUSHION COVER RH

(a) Check the seat cushion heater.





(1) Measure the resistance according to the value(s) in the table below.

Standard resistance:





If the result is not as specified, replace the front seat cushion cover RH.

(b) Check the seat cushion heater (wing part).





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

Standard resistance:





If the result is not as specified, replace the front seat cushion cover RH.

NG -- REPLACE FRONT SEAT CUSHION COVER RH Removal
OK -- Continue to next step.

22. INSPECT FRONT SEATBACK COVER RH

(a) Check the seatback heater.





(1) Measure the resistance according to the value(s) in the table below.

Standard resistance:





If the result is not as specified, replace the front seatback cover RH.

NG -- REPLACE FRONT SEATBACK COVER RH Removal
OK -- Continue to next step.

23. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - FRONT SEAT CUSHION COVER RH)

(a) Disconnect the e3 ECU connector.





(b) Disconnect the e9 cushion cover connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
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