Climate Control System Does Not Operate on Rear Right Side
SEAT: CLIMATE CONTROL SEAT SYSTEM: Climate Control System does not Operate on Rear Right Side
- Climate Control System does not Operate on Rear Right Side
DESCRIPTION
When the curtain switch assembly's* seat heater switch is operated, the rear power seat switch receives the signal. The rear power seat switch then sends the signal to the seat climate control ECU through LIN communication. The seat climate control ECU receives the signal and operates the air seat.
HINT
*: except 4-Passenger with Ottoman
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no LIN communication malfunctions before troubleshooting this problem.
PROCEDURE
1. CONFIRM PROBLEM SYMPTOMS
Result
B -- CONFIRM TROUBLE AREAS
C -- READ VALUE USING TECHSTREAM (REAR POWER SEAT MODULE SWITCH)
A -- Continue to next step.
2. READ VALUE USING TECHSTREAM (REAR POWER SEAT MODULE SWITCH)
(a) Check the Data List for proper functioning of the rear power seat module switch.
Rear Console Switch
OK:
Tester display changes normally when rear left seat A/C switch is operated
Result
B -- REPLACE REAR POWER SEAT MODULE SWITCH Removal
C -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
D -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
A -- Continue to next step.
3. INSPECT CURTAIN SWITCH ASSEMBLY
(a) Measure the voltage according to the value(s) in the table below.
Standard voltage:
HINT
As the circuit has a diode, perform the measurement with the tester in diode mode.
(b) Disconnect the r3 switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Result
B -- REPLACE CURTAIN SWITCH ASSEMBLY Disassembly
C -- REPLACE CURTAIN SWITCH ASSEMBLY Disassembly
A -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (REAR POWER SEAT MODULE SWITCH - CURTAIN SWITCH)
(a) Disconnect the r1 power seat switch connector.
(b) Disconnect the r3 curtain switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Result
B -- REPLACE REAR POWER SEAT MODULE SWITCH Disassembly
C -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- REPLACE REAR POWER SEAT MODULE SWITCH Disassembly
5. CONFIRM TROUBLE AREAS
Result
B -- PERFORM ACTIVE TEST USING TECHSTREAM
C -- PERFORM ACTIVE TEST USING TECHSTREAM
A -- Continue to next step.
6. READ VALUE USING TECHSTREAM (REAR POWER SEAT MODULE SWITCH)
(a) Check the Data List for proper functioning of the rear power seat module switch.
Rear Console Switch
OK:
Tester display changes normally when rear left seat A/C switch is operated
Result
B -- REPLACE REAR POWER SEAT MODULE SWITCH Removal
C -- PERFORM ACTIVE TEST USING TECHSTREAM
A -- Continue to next step.
7. INSPECT CURTAIN SWITCH ASSEMBLY
(a) Disconnect the r3 switch connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Result
B -- REPLACE CURTAIN SWITCH ASSEMBLY Disassembly
C -- REPLACE CURTAIN SWITCH ASSEMBLY Disassembly
A -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (REAR POWER SEAT MODULE SWITCH - CURTAIN SWITCH)
(a) Disconnect the r1 power seat switch connector.
(b) Disconnect the r3 curtain switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Result
B -- REPLACE REAR POWER SEAT MODULE SWITCH Disassembly
C -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- REPLACE REAR POWER SEAT MODULE SWITCH Disassembly
9. PERFORM ACTIVE TEST USING TECHSTREAM
(a) Select the Active Test, use the Techstream to generate a control command, and then check the climate control seat function.
Rear Right Seat A/C
OK:
Cool air operates normally
Result
B -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
C -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
A -- Continue to next step.
10. CHECK SEAT CLIMATE CONTROL CONTROLLER RH
(a) w/o Ottoman:
Replace the seat climate control controller RH Disassembly.
(b) w/ Ottoman:
Replace the seat climate control controller RH Disassembly.
(c) Check the climate control seat function is normal.
OK:
Climate control seat function is normal
NG -- CHECK REAR SEATBACK CLIMATE CONTROL BLOWER RH
OK -- END (SEAT CLIMATE CONTROL CONTROLLER RH WAS DEFECTIVE)
11. CHECK REAR SEATBACK CLIMATE CONTROL BLOWER RH
(a) w/o Ottoman:
Replace the rear seatback climate control blower RH Disassembly.
(b) w/ Ottoman:
Replace the rear seatback climate control blower RH Disassembly.
(c) 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 RH AND REAR SEATBACK CLIMATE CONTROL BLOWER RH)
OK -- END (REAR SEATBACK CLIMATE CONTROL BLOWER RH WAS DEFECTIVE)
12. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL CONTROLLER RH AND REAR SEATBACK CLIMATE CONTROL BLOWER RH)
(a) Disconnect the f8 ECU connector.
(b) Disconnect the p1 climate control controller connector.
(c) Disconnect the f12 climate control blower connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Result
B -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
C -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
13. 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.
Rear Right Seat A/C
OK:
Blower motor operates normally
Result
B -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
C -- CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL BLOWER RH)
A -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
14. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL BLOWER RH)
(a) Disconnect the f8 ECU connector.
(b) Disconnect the p2 climate control 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 -- Continue to next step.
15. CHECK SEAT CLIMATE CONTROL ECU
(a) Disconnect the p2 blower connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:
Result
B -- REPLACE SEAT CLIMATE CONTROL BLOWER RH Disassembly
C -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
D -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
A -- REPLACE SEAT CLIMATE CONTROL BLOWER RH Disassembly
16. 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.
Rear Right Seat A/C
OK:
Blower motor operates normally
Result
B -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
C -- CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - REAR SEATBACK CLIMATE CONTROL BLOWER RH)
A -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
17. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - REAR SEATBACK CLIMATE CONTROL BLOWER RH)
(a) Disconnect the f8 ECU connector.
(b) Disconnect the f11 climate control 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 -- Continue to next step.
18. CHECK SEAT CLIMATE CONTROL ECU
(a) Disconnect the f11 blower connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:
Result
B -- REPLACE SEAT CLIMATE CONTROL BLOWER RH Disassembly
C -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
D -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
A -- REPLACE SEAT CLIMATE CONTROL BLOWER RH Disassembly
19. READ VALUE USING TECHSTREAM (REAR POWER SEAT MODULE SWITCH)
(a) Check the Data List for proper functioning of the rear power seat module switch.
Rear Console Switch
OK:
Tester display changes normally when rear left seat A/C switch is operated
Result
B -- INSPECT CURTAIN SWITCH ASSEMBLY
C -- REPLACE REAR POWER SEAT MODULE SWITCH Removal
A -- Continue to next step.
20. INSPECT REAR SEATBACK COVER RH
(a) Remove the rear seatback cover RH.
(b) 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 rear seatback cover RH.
(c) Check the rear wing 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 rear seatback cover RH.
Result
B -- REPLACE REAR SEATBACK COVER RH Removal
C -- REPLACE REAR SEATBACK COVER RH Removal
A -- Continue to next step.
21. INSPECT REAR SEAT CUSHION COVER RH
(a) Remove the rear seat cushion cover RH.
(b) Check the rear 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 rear seat cushion cover RH.
(c) Check the rear wing 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 rear seat cushion cover RH.
Result
B -- REPLACE REAR SEAT CUSHION COVER RH Removal
C -- REPLACE REAR SEAT CUSHION COVER RH Removal
A -- Continue to next step.
22. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - REAR SEATBACK COVER RH)
(a) Disconnect the f7 ECU connector.
(b) Disconnect the f3 seatback cover connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Result
B -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
C -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- REPLACE SEAT CLIMATE CONTROL ECU Disassembly
23. INSPECT CURTAIN SWITCH ASSEMBLY
(a) Disconnect the r3 switch connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Result
B -- REPLACE CURTAIN SWITCH ASSEMBLY Disassembly
C -- REPLACE CURTAIN SWITCH ASSEMBLY Disassembly
A -- Continue to next step.
24. CHECK HARNESS AND CONNECTOR (REAR POWER SEAT MODULE SWITCH - CURTAIN SWITCH)
(a) Disconnect the r1 power seat switch connector.
(b) Disconnect the r3 curtain switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Result
B -- REPLACE REAR POWER SEAT MODULE SWITCH Disassembly
C -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- REPLACE REAR POWER SEAT MODULE SWITCH Disassembly