Diagnosis Procedure

1. Turn ignition switch ON.
2. Check voltage between seatback thermal electric device harness connector and ground.

   (+)			(-)	Condition	Voltage (V) (Approx.)
   Seatback thermal electric device
   Connector		Terminal
   Driver side	B212	3	Ground	Climate controlled seat operated	1 - 5
   Passenger side	B309

Is the inspection result normal?

YES

GO TO 3.

NO

GO TO 2.

1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit connector and seatback thermal electric device connector.
3. Check continuity between climate controlled seat control unit harness connector and seatback thermal electric device harness connector.

   Climate controlled seat control unit			Seatback thermal electric device		Continuity
   Connector		Terminal	Connector	Terminal
   Driver side	B204	3	B212	3	Yes
   Passenger side	B305		B309

4. Check continuity between climate controlled seat control unit harness connector and ground.

   Climate controlled seat control unit			Ground	Continuity
   Connector		Terminal
   Driver side	B204	3		No
   Passenger side	B305

Is the inspection result normal?

YES

Replace climate controlled seat control unit. Refer to Exploded View .

NO

Repair or replace harness.

1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit connector and seatback thermal electric device connector.
3. Check continuity between climate controlled seat control unit harness connector and seatback thermal electric device harness connector.

   Climate controlled seat control unit			Seatback thermal electric device		Continuity
   Connector		Terminal	Connector	Terminal
   Driver side	B204	18	B212	4	Yes
   Passenger side	B305		B309

4. Check continuity between climate controlled seat control unit harness connector and ground.

   Climate controlled seat control unit			Ground	Continuity
   Connector		Terminal
   Driver side	B204	18		No
   Passenger side	B305

Is the inspection result normal?

YES

GO TO 4.

NO

Repair or replace harness.

Check seatback thermal electric device sensor.

Refer to Component Inspection .

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

NO

Replace seatback thermal electric device. Refer to Seatback Thermal Electric Device .