Seat Cushion Heater

POWER SUPPLY AND GROUND CIRCUIT

SEAT CUSHION HEATER : Diagnosis Procedure


1. CHECK FUSE

Check that the following fuse and fusible link are not fusing.





Is the inspection result normal?
YES- GO TO 2.
NO- Replace the blown fuse after repairing the affected circuit.

2. CHECK SEAT CUSHION HEATER POWER SUPPLY

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





Is the inspection result normal?
YES- GO TO 4.
NO- GO TO 3.

3. CHECK SEAT CUSHION HEATER POWER SUPPLY CIRCUIT

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





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





Is the inspection result normal?
YES- Repair or replace harness between heated seat relay and fuse holder.
NO- Repair or replace harness between seat cushion heater and heated seat relay.

4. CHECK HEATED SEAT OPERATION SIGNAL

Check voltage between seat cushion heater harness connector and ground.





Is the inspection result normal?
YES- GO TO 7.
NO- GO TO 5.

5. CHECK HEATED SEAT OPERATION SIGNAL CIRCUIT

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





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





Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace harness.

6. CHECK HEATED SEAT SWITCH

Check heated seat switch.
Component Tests and General Diagnostics.
Is the inspection result normal?
YES- GO TO 8.
NO- Replace heated seat switch.

7. CHECK SEAT CUSHION HEATER GROUND CIRCUIT

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





Is the inspection result normal?
YES- INSPECTION END
NO- Repair or replace harness.

8. CHECK INTERMITTENT INCIDENT

Check intermittent incident.
Intermittent Incident.
- INSPECTION END