Component Function Check

Component Function Check

1. CHECK FUNCTION

   1. Check that the seat heater LH (back) warms to the preset temperature when operating the heated seat switch LH to HIGH and LOW.

   Is the inspection result normal?

   YES>>

   Seat heater LH (back) function is OK.

   NO>>

   Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

1. CHECK CUSHION HEATER LH

   1. Check cushion heater LH.

      Refer to Component Function Check.

   Is the inspection result normal?

   YES>>

   GO TO 2.

   NO>>

   Refer to Diagnosis Procedure.

2. CHECK SEAT HEATER LH (BACK) POWER SUPPLY

   1. 1. Disconnect seat heater LH (back) connector.

      2. Ignition switch ON.

      3. Check voltage between seat heater LH (back) harness connector and ground.

         With power seat

         (+)		(–)	Condition		Voltage (Approx.)
         Seat heater LH (back)
         Connector	Terminal
         B238	2	Ground	Heated seat switch LH (HIGH)	ON	Battery voltage
         				Other than above	0 V
         			Heated seat switch LH (LOW)	ON	Battery voltage
         				Other than above	0 V

         With manual seat

         (+)		(–)	Condition		Voltage (Approx.)
         Seat heater LH (back)
         Connector	Terminal
         B230	1	Ground	Heated seat switch LH (HIGH)	ON	Battery voltage
         				Other than above	0 V
         			Heated seat switch LH (LOW)	ON	Battery voltage
         				Other than above	0 V

   Is the inspection result normal?

   YES>>

   GO TO 4.

   NO (with power seat)>>

   GO TO 3.

   NO (with manual seat)>>

   Replace front seat heater LH. Refer to Exploded View.

3. CHECK SEAT HEATER LH (BACK) CIRCUIT

   1. 1. Turn heated seat switch OFF.

      2. Ignition switch OFF.

      3. Disconnect front seat cushion heater LH connector.

      4. Check continuity between seat heater LH (back) harness connector and front seat cushion heater LH harness connector.

         Seat heater LH (back)		Front seat cushion heater LH		Continuity
         Connector	Terminal	Connector	Terminal
         B238	2	B216	4	Yes

      5. Check continuity between seat heater LH (back) harness connector and ground.

         Seat heater LH (back)		—	Continuity
         Connector	Terminal
         B238	2	Ground	No

   Is the inspection result normal?

   YES>>

   Replace front seat cushion heater LH. Refer to Exploded View.

   NO>>

   Repair or replace harness.

4. CHECK SEAT HEATER LH (BACK) GROUND CIRCUIT

   1. 1. Turn heated seat switch OFF.

      2. Ignition switch OFF.

      3. Check continuity between seat heater LH (back) harness connector and ground.

         With power seat

         Seat heater LH (back)		(–)	Continuity
         Connector	Terminal
         B238	1	Ground	Yes

         With manual seat

         Seat heater LH (back)		(–)	Continuity
         Connector	Terminal
         B230	2	Ground	Yes

   Is the inspection result normal?

   YES >>

   Replace seat heater LH (back). Refer to Exploded View.

   NO >>

   Repair or replace harness.