Climate Control Seat System Does Not Operate
SEAT: CLIMATE CONTROL SEAT SYSTEM: Climate Control Seat System does not Operate
Climate Control Seat System does not Operate
DESCRIPTION
The A/C amplifier assembly receives seat heater switch position signals when the engine switch is on (IG), and then transmits airflow amount signals to each seat climate blower.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. SYSTEM CHECK
(a) Check the climate control seat operation.
Result:
C -- INSPECT SEAT HEATER SWITCH
B -- SYSTEM CHECK
A -- Continue to next step.
2. SYSTEM CHECK
(a) Check the climate control operation again.
Result:
B -- CHECK HARNESS AND CONNECTOR
A -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR
(a) Disconnect the U13 connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NG -- CHECK HARNESS AND CONNECTOR
OK -- REPLACE SEAT BACK CLIMATE CONTROL BLOWER LH
4. CHECK HARNESS AND CONNECTOR
(a) Disconnect the U12 connector.
(b) 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 BLOWER LH
5. CHECK HARNESS AND CONNECTOR
(a) Disconnect the U12 connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage and Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
(a) Reconnect the U12 connector.
(b) Check the input signal waveform.
(1) Connect the oscilloscope to terminal 3 and body ground with the climate control blower LH connector still connected.
(2) Check the signal waveform according to the condition(s) in the table below.
NG -- CHECK HARNESS AND CONNECTOR
OK -- REPLACE SEAT CLIMATE CONTROL BLOWER LH
7. CHECK HARNESS AND CONNECTOR
(a) Disconnect the U12 and J59 connectors.
(b) 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.
8. INSPECT SEAT HEATER SWITCH
(a) Remove the seat heater switch Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE SEAT HEATER SWITCH
OK -- Continue to next step.
9. CHECK HARNESS AND CONNECTOR
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
10. SYSTEM CHECK
(a) Check the climate control operation again.
Result:
B -- CHECK HARNESS AND CONNECTOR
A -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR
(a) Disconnect the T13 connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NG -- CHECK HARNESS AND CONNECTOR
OK -- REPLACE SEAT BACK CLIMATE CONTROL BLOWER RH
12. CHECK HARNESS AND CONNECTOR
(a) Disconnect the T12 connector.
(b) 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 BLOWER RH
13. CHECK HARNESS AND CONNECTOR
(a) Disconnect the T12 connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage and Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
14. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
(a) Reconnect the T12 connector.
(b) Check the input signal waveform.
(1) Connect the oscilloscope to terminal 3 and body ground with the climate control blower RH connector still connected.
(2) Check the signal waveform according to the condition(s) in the table below.
NG -- CHECK HARNESS AND CONNECTOR
OK -- REPLACE SEAT CLIMATE CONTROL BLOWER RH
15. CHECK HARNESS AND CONNECTOR
(a) Disconnect the T12 and J59 connectors.
(b) 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.
16. INSPECT SEAT HEATER SWITCH
(a) Remove the seat heater switch Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE SEAT HEATER SWITCH
OK -- Continue to next step.
17. CHECK HARNESS AND CONNECTOR
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
18. INSPECT SEAT HEATER SWITCH
(a) Remove the seat heater switch Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE SEAT HEATER SWITCH
OK -- Continue to next step.
19. CHECK HARNESS AND CONNECTOR
(a) Disconnect the J59 connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY