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 power 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:
B -- SYSTEM CHECK
C -- INSPECT SEAT HEATER SWITCH
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 a16 connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
NG -- CHECK HARNESS AND CONNECTOR
OK -- REPLACE SEAT BACK CLIMATE CONTROL BLOWER LH Disassembly
4. CHECK HARNESS AND CONNECTOR
(a) Disconnect the a15 connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH Disassembly
5. CHECK HARNESS AND CONNECTOR
(a) Disconnect the a15 connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage and Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
(a) Reconnect the a15 connector.
(b) Check the input signal waveform.
(1) Connect the oscilloscope to terminal 3 and body ground with the seat cushion climate control blower assembly LH connector still connected.
(2) Check the signal waveform according to the condition(s) in the table below.
Text in Illustration
NG -- CHECK HARNESS AND CONNECTOR
OK -- REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH Disassembly
7. CHECK HARNESS AND CONNECTOR
(a) Disconnect the a15 and F51 connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
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:
Text in Illustration
NG -- REPLACE SEAT HEATER SWITCH Removal
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:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal
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 Z20 connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
NG -- CHECK HARNESS AND CONNECTOR
OK -- REPLACE SEAT BACK CLIMATE CONTROL BLOWER RH Disassembly
12. CHECK HARNESS AND CONNECTOR
(a) Disconnect the Z19 connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH Disassembly
13. CHECK HARNESS AND CONNECTOR
(a) Disconnect the Z19 connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage and Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
14. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
(a) Reconnect the Z19 connector.
(b) Check the input signal waveform.
(1) Connect the oscilloscope to terminal 3 and body ground with the climate control blower assembly RH connector still connected.
(2) Check the signal waveform according to the condition(s) in the table below.
Text in Illustration
NG -- CHECK HARNESS AND CONNECTOR
OK -- REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH Disassembly
15. CHECK HARNESS AND CONNECTOR
(a) Disconnect the Z19 and F51 connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
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:
Text in Illustration
NG -- REPLACE SEAT HEATER SWITCH Removal
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:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal
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:
Text in Illustration
NG -- REPLACE SEAT HEATER SWITCH Removal
OK -- Continue to next step.
19. CHECK HARNESS AND CONNECTOR
(a) Disconnect the F51 connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal