Diagnosis Procedure

1. Turn ignition switch ON.
2. 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	3	Ground	Climate controlled seat operated	1V - 5V
   RH	B313

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 LH connector B229 and climate controlled seat control unit RH connector B304 and seatback thermal electric device LH connector B202 and seatback thermal electric device RH connector B313.
3. Check continuity between climate controlled seat control unit LH harness connector B229 and climate controlled seat control unit RH harness connector B304 and seatback thermal electric device LH harness connector B202 and seatback thermal electric device RH harness connector B313.

   Climate controlled seat control unit			Seatback thermal electric device		Continuity
   Connector		Terminal	Connector	Terminal
   LH	B229	3	B202	3	Yes
   RH	B304		B313

4. Check continuity between climate controlled seat control unit LH harness connector B229 and climate controlled seat control unit RH harness connector B304 and ground.

   Climate controlled seat control unit			(-)	Continuity
   Connector		Terminal
   LH	B229	3	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.

1. Turn ignition switch OFF.
2. Disconnect climate controlled seat control unit LH connector B229 and climate controlled seat control unit RH connector B304 and seatback thermal electric device LH connector B202 and seatback thermal electric device RH connector B313.
3. Check continuity between climate controlled seat control unit LH harness connector B229 and climate controlled seat control unit RH harness connector B304 and seatback thermal electric device LH harness connector B202 and seatback thermal electric device RH harness connector B313.

   Climate controlled seat control unit			Seatback thermal electric device		Continuity
   Connector		Terminal	Connector	Terminal
   LH	B229	18	B202	4	Yes
   RH	B304		B313

4. Check continuity between climate controlled seat control unit LH harness connector B229 and climate controlled seat control unit RH harness connector B304 and ground.

   Climate controlled seat control unit			(-)	Continuity
   Connector		Terminal
   LH	B229	18	Ground	No
   RH	B304

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 .