Diagnosis Procedure
- CHECK SEATBACK THERMAL ELECTRIC DEVICE INPUT SIGNAL
- Turn ignition switch ON.
- Check voltage between seatback thermal electric device LH harness connector B202 and seatback thermal electric device RH harness connector B313 and ground.
(+)
(-)
Condition
Voltage
(Approx.)
Seatback thermal electric device
Connector
Terminal
LH
B202
1
Ground
Climate controlled seat switch
HEAT or COOL
0V - 12V*
Other than above
0V
2
HEAT or COOL
0V - 12V*
Other than above
0V
RH
B313
1
Climate controlled seat switch
HEAT or COOL
0V - 12V*
Other than above
0V
2
HEAT or COOL
0V - 12V*
Other than above
0V
* : It changes between 12V and 0V.
NOTE: Wait 1 minute or more after the activation start, and then start the measurement.
Is the inspection result normal?
YES
Replace seatback thermal electric device. Refer to Seatback Thermal Electric Device .
NO
GO TO 2 .
- CHECK SEATBACK THERMAL ELECTRIC DEVICE CIRCUIT
- Turn ignition switch OFF.
- Disconnect climate controlled seat control unit LH connector B230 and climate controlled seat control unit RH connector B305 and seatback thermal electric device LH connector B202 and seatback thermal electric device RH connector B313.
- Check continuity between climate controlled seat control unit LH connector B230 and climate controlled seat control unit RH connector B305 and seatback thermal electric device LH connector B202 and seatback thermal electric device RH connector B313.
Climate controlled seat control unit
Seatback thermal electric device
Continuity
Connector
Terminal
Connector
Terminal
LH
B230
30
B202
1
Yes
28
2
RH
B305
30
B313
1
28
2
- Check continuity between climate controlled seat control unit LH harness connector B230 and climate controlled seat control unit RH harness connector B305 and ground.
Climate controlled seat control unit
(-)
Continuity
Connector
Terminal
LH
B230
30
Ground
No
28
RH
B305
30
28
Is the inspection result normal?
YES
Replace climate controlled seat control unit. Refer to Removal and Installation .
NO
Repair or replace harness.