Diagnosis Procedure

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

   (+)			(-)	Condition	Voltage (V) (Approx.)
   Seatback thermal electric unit
   Connector		Terminal
   Driver side	B532	67	Ground	Climate controlled seat operated	1 - 5
   Passenger side	B562

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 unit connector.
3. Check continuity between climate controlled seat control unit harness connector and seatback thermal electric unit harness connector.

   Climate controlled seat control unit			Seatback thermal electric unit		Continuity
   Connector		Terminal	Connector	Terminal
   Driver side	B660	67	B532	67	Existed
   Passenger side	B662		B562

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

   Climate controlled seat control unit			Ground	Continuity
   Connector		Terminal
   Driver side	B660	67		Not existed
   Passenger side	B662

Is the inspection result normal?

YES

Replace climate controlled seat control unit.

NO

Repair or replace harness.

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

   Climate controlled seat control unit			Seatback thermal electric unit		Continuity
   Connector		Terminal	Connector	Terminal
   Driver side	B660	68	B532	68	Existed
   Passenger side	B662		B562

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

   Climate controlled seat control unit			Ground	Continuity
   Connector		Terminal
   Driver side	B660	68		Not existed
   Passenger side	B662

Is the inspection result normal?

YES

GO TO 4.

NO

Repair or replace harness.

Check seatback thermal electric unit sensor.

Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 5.

NO

Replace seatback thermal electric unit.

Refer to Intermittent Incident .

INSPECTION END