Diagnosis Procedure

Check that the following fuse is not blown (open).

Is the inspection result normal?

YES

GO TO 2.

NO

Replace the blown (open) fuse after repairing the affected circuit.

1. Turn ignition switch OFF.
2. Disconnect front seat cushion heater connector.
3. Turn ignition switch ON.
4. Check voltage between front seat cushion heater harness connector and ground.

   (+)			(-)	Voltage (V) (Approx.)
   Front seat cushion heater
   Connector		Terminal
   Driver side	B534	77	Ground	Battery voltage
   Passenger side	B574

Is the inspection result normal?

YES

GO TO 4.

NO

GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect front heated seat relay.
3. Check continuity between front seat cushion heater harness connector and front heated seat relay terminal connector.

   Front seat cushion heater			Front heated seat relay		Continuity
   Connector		Terminal	Connector	Terminal
   Driver side	B534	77	M70	3	Existed
   Passenger side	B574

4. Check continuity between front seat cushion heater harness connector and ground.

   Front seat cushion heater			Ground	Continuity
   Connector		Terminal
   Driver side	B534	77		Not existed
   Passenger side	B574

Is the inspection result normal?

YES

Repair or replace harness between front heated seat relay and fuse holder.

NO

Repair or replace harness between front seat cushion heater and front heated seat relay.

Check voltage between front seat cushion heater harness connector and ground.

Is the inspection result normal?

YES

GO TO 7.

NO

GO TO 5.

1. Turn ignition switch OFF.
2. Disconnect front heated seat switch connector.
3. Check continuity between front seat cushion heater harness connector and front heated seat switch harness connector.

   Front seat cushion heater			Front heated seat switch		Continuity
   Connector		Terminal	Connector	Terminal
   Driver side	B534	73	M198	1	Existed
   Passenger side	B574		M199

4. Check continuity between seat cushion heater harness connector and ground.

   Front seat cushion heater			Ground	Continuity
   Connector		Terminal
   Driver side	B534	73		Not existed
   Passenger side	B574

Is the inspection result normal?

YES

GO TO 6.

NO

Repair or replace harness.

Check front heated seat switch.

Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 8.

NO

Replace front heated seat switch.

1. Turn ignition switch OFF.
2. Check continuity between front seat cushion heater harness connector and ground.

Is the inspection result normal?

YES

INSPECTION END

NO

Repair or replace harness.

Check intermittent incident.

Refer to Intermittent Incident .

INSPECTION END