Check Climate Controlled Seat Switch Indicator Circuit

1. Turn ignition switch ON.
2. Check voltage between climate controlled seat switch connector and ground.
   VOLTAGE SPECIFICATION
   
   

   Terminal			Condition		Voltage (V) (Approx.)
   (+)		(-)
   Climate controlled seat control unit connector	Terminal
   B283 (driver side) B293 (passenger side)	8	Ground	Climate controlled seat switch	HEAT	Battery voltage
   			Other than above.		0
   	9		Climate controlled seat switch	COOL	Battery voltage
   			Other than above.		0

   Fig 1: Checking Voltage Between Climate Controlled Seat Switch Connector And Ground

   

OK or NG 

OK: GO TO 2.

NG: Replace climate controlled seat control unit.

1. Turn ignition switch OFF.
2. Disconnect climate controlled seat switch and climate controlled seat control unit connector.
3. Check continuity between climate controlled seat control unit connector and climate controlled seat switch.
   • Driver side
     CONTINUITY SPECIFICATION
     
     

     A		B		Continuity
     Climate controlled seat control unit connector	Terminal	Climate controlled seat switch connector	Terminal
     B283	8	B430	5	Yes
     	9		4

   • Passenger side
     CONTINUITY SPECIFICATION
     
     

     A		C		Continuity
     Climate controlled seat control unit connector	Terminal	Climate controlled seat switch connector	Terminal
     B293	8	B429	5	Yes
     	9		4

4. Check continuity between climate controlled seat control unit connector and ground.
   Fig 2: Check Continuity Between Climate Controlled Seat Control Unit Connector And Climate Controlled Seat Switch

   
   CONTINUITY SPECIFICATION
   
   

   A		Ground	Continuity
   Climate controlled seat control unit connector	Terminal
   B283 (driver side) B293 (passenger side)	8		No
   	9

OK or NG 

OK: GO TO 3.

NG: Repair or replace harness between climate controlled seat control unit and climate controlled seat switch.

Check continuity between climate controlled seat switch.

*: Driver side

OK or NG 

OK: Check the condition of the harness and the connector.

NG: Replace climate controlled seat switch.

Fig 3: Checking Continuity Between Climate Controlled Seat Switch