Diagnosis Procedure
- CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE SENSOR SIGNAL
- Turn ignition switch ON.
- Check voltage between seat cushion thermal electric device LH harness connector B203 and seat cushion thermal electric device RH harness connector B312 and ground.
(+)
(-)
Condition
Voltage
(Approx.)
Seat cushion thermal electric device
Connector
Terminal
LH
B203
3
Ground
Climate controlled seat operated
1V - 5V
RH
B312
Is the inspection result normal?
YES
GO TO 3 .
NO
GO TO 2 .
- CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE SENSOR CIRCUIT
- Turn ignition switch OFF.
- Disconnect climate controlled seat control unit LH connector B229 and climate controlled seat control unit RH connector B304 and seat cushion thermal electric device LH harness connector B203 and seat cushion thermal electric device RH harness connector B312.
- Check continuity between climate controlled seat control unit LH connector B229 and climate controlled seat control unit RH connector B304 and seat cushion thermal electric device LH harness connector B203 and seat cushion thermal electric device RH harness connector B312.
Climate controlled seat control unit
Seat cushion thermal electric device
Continuity
Connector
Terminal
Connector
Terminal
LH
B229
2
B203
3
Yes
RH
B304
B312
- Check continuity between climate controlled seat control unit LH connector B229 and climate controlled seat control unit RH connector B304 and ground.
Climate controlled seat control unit
(-)
Continuity
Connector
Terminal
LH
B229
2
Ground
No
RH
B304
Is the inspection result normal?
YES
Replace climate controlled seat control unit. Refer to Removal and Installation .
NO
Repair or replace harness.
- CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE SENSOR GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect climate controlled seat control unit LH connector B229 and climate controlled seat control unit RH connector B304 and seat cushion thermal electric device LH harness connector B203 and seat cushion thermal electric device RH harness connector B312.
- Check continuity between climate controlled seat control unit LH connector B229 and climate controlled seat control unit RH connector B304 and seat cushion thermal electric device LH harness connector B203 and seat cushion thermal electric device RH harness connector B312.
Climate controlled seat control unit
Seat cushion thermal electric device
Continuity
Connector
Terminal
Connector
Terminal
LH
B229
17
B203
4
Yes
RH
B304
B312
- Check continuity between climate controlled seat control unit LH connector B229 and climate controlled seat control unit RH connector B304 and ground.
Climate controlled seat control unit
(-)
Continuity
Connector
Terminal
LH
B229
17
Ground
No
RH
B304
Is the inspection result normal?
YES
GO TO 4 .
NO
Repair or replace harness.
- CHECK SEAT CUSHION THERMAL ELECTRIC DEVICE SENSOR
Check seat cushion thermal electric device sensor. Refer to Component Inspection .
Is the inspection result normal?
YES
Check intermittent incident. Refer to Intermittent Incident .
NO
Replace seat cushion thermal electric device. Refer to Seat Cushion .