Diagnosis Procedure

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

   (+)			(-)	Condition		Voltage (Approx.)
   Seatback thermal electric device
   Connector		Terminal
   LH	B218	1	Ground	Climate controlled seat switch	HEAT or COOL	0 - 12*
   					Other than above	0
   		2			HEAT or COOL	0 - 12*
   					Other than above	0
   RH	B316	1		Climate controlled seat switch	HEAT or COOL	0 - 12*
   					Other than above	0
   		2			HEAT or COOL	0 - 12*
   					Other than above	0

   *: It changes between 12 and 0 V.

   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.

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
   LH	B217	27	B218	2	Yes
   		29		1
   RH	B313	27	B316	2
   		29		1

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

   Climate controlled seat control unit			Ground	Continuity
   Connector		Terminal
   LH	B217	27		No
   		29
   RH	B313	27
   		29

Is the inspection result normal?

YES

Replace climate controlled seat control unit. Refer to Climate Controlled Seat Control Unit .

NO

Repair or replace harness.