Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CHECK CLIMATE CONTROLLED SEAT CONTROL UNIT INPUT SIGNAL
   
   
   1. Turn ignition switch ON.
   2. Check voltage between climate controlled seat control unit harness connector and ground.

      (+)			(-)	Condition			Voltage (V) (Approx.)
      Climate controlled seat control unit
      Connector		Terminal
      Driver side	B204	7	Ground	Climate controlled seat switch (driver side)	COOL	HI	2.6 - 4.2
      						MID	1.6 - 2.5
      						LO	0.8 - 1.5
      					OFF		0
      		6			HEAT	HI	2.6 - 4.2
      						MID	1.6 - 2.5
      						LO	0.8 - 1.5
      					OFF		0
      Passenger side	B305	7		Climate controlled seat switch (passenger seat)	COOL	HI	2.6 - 4.2
      						MID	1.6 - 2.5
      						LO	0.8 - 1.5
      					OFF		0
      		6			HEAT	HI	2.6 - 4.2
      						MID	1.6 - 2.5
      						LO	0.8 - 1.5
      					OFF		0

   Is the inspection result normal?

   YES 

   Inspection End.

   NO-1 

   HEAT or COOL mode is NG. GO TO 2.

   NO-2 

   HEAT and COOL mode are NG. GO TO 3.

2. CHECK CLIMATE CONTROLLED SEAT SWITCH CIRCUIT
   
   
   1. Turn ignition switch OFF.
   2. Disconnect climate controlled seat switch connector and climate controlled seat control unit connector.
   3. Check continuity between climate controlled seat switch harness connector and climate controlled seat control unit harness connector.

      Climate controlled seat switch				Climate controlled seat control unit		Continuity
      Connector			Terminal	Connector	Terminal
      Driver side	COOL	M203	2	B204	7	Yes
      	HEAT		3		6
      Passenger side	COOL	M206	2	B305	7
      	HEAT		3		6

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

      Climate controlled seat switch				Ground	Continuity
      Connector			Terminal
      Driver side	COOL	M203	2		No
      	HEAT		3
      Passenger side	COOL	M206	2
      	HEAT		3

   Is the inspection result normal?

   YES 

   GO TO STEP 5  .

   NO 

   Repair or replace harness.

3. CHECK CLIMATE CONTROLLED SEAT SWITCH POWER SUPPLY
   
   
   1. Turn ignition switch OFF.
   2. Disconnect climate controlled seat switch connector.
   3. Turn ignition switch ON.
   4. Check voltage between climate controlled seat switch harness connector and ground.

      (+)			(-)	Voltage (V) (Approx.)
      Climate controlled seat switch
      Connector		Terminal
      Driver side	M203	1	Ground	Battery voltage
      Passenger side	M206

   Is the inspection result normal?

   YES 

   GO TO STEP 5  .

   NO 

   GO TO STEP 4  .

4. CHECK CLIMATE CONTROLLED SEAT SWITCH POWER SUPPLY CIRCUIT
   
   
   1. Turn ignition switch OFF.
   2. Disconnect climate controlled seat control unit connector.
   3. Check continuity between climate controlled seat switch harness connector and climate controlled seat control unit harness connector.

      Climate controlled seat switch			Climate controlled seat control unit		Continuity
      Connector		Terminal	Connector	Terminal
      Driver side	M203	1	B204	8	Yes
      Passenger side	M206		B305

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

      Climate controlled seat switch			Ground	Continuity
      Connector		Terminal
      Driver side	M203	1		No
      Passenger side	M206

   Is the inspection result normal?

   YES 

   Replace climate controlled seat control unit. Refer to EXPLODED VIEW .

   NO 

   Repair or replace harness.

5. CHECK CLIMATE CONTROLLED SEAT SWITCH
   
   

   Check climate controlled seat switch.

   Refer to COMPONENT INSPECTION .

   Is the inspection result normal?

   YES 

   Check intermittent incident  . Refer to INTERMITTENT INCIDENT .

   NO 

   Replace climate controlled seat switch. Refer to REMOVAL AND INSTALLATION .