Heated Steering Wheel Switch Indicator Lamp

HEATED STEERING WHEEL SWITCH INDICATOR LAMP

Component Function Check


1. CHECK HEATED STEERING WHEEL SWITCH INDICATOR LAMP

1.Turn ignition switch ON.
2.Turn heated steering wheel switch ON. Observe indicator.
3.Turn heated steering wheel switch OFF. Observe indicator.
Does heated steering wheel switch indicator lamp turn ON and then OFF?
YES- Inspection End.
NO- Go to "Diagnosis Procedure" .


Diagnosis Procedure


1. CHECK POWER CIRCUIT

1.Turn ignition switch OFF.
2.Remove the heated steering wheel switch.
3.Turn ignition switch ON.
4.Check voltage between heated steering wheel switch harness connector M114.





Is the inspection result normal?
YES- GO TO 2.
NO- GO TO 3.

2. CHECK GROUND CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect heated steering wheel switch connector.
3.Check continuity between heated steering wheel switch harness connector terminal M51 and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace the harness or connectors.

3. CHECK HARNESS BETWEEN HEATED STEERING RELAY AND HEATED STEERING WHEEL SWITCH

1.Disconnect heated steering relay connector.
2.Check continuity between heated steering relay harness connector terminal M90 and heated steering wheel switch harness connector M51.





3.Check continuity between heated steering relay harness connector M90 and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace harness or connectors.

4. CHECK HEATED STEERING RELAY

Check heated steering relay. Refer to "Component Inspection (Heated Steering Relay)" Heated Steering Wheel System.
Is the inspection result normal?
YES- GO TO 5.
NO- Replace heated steering relay.

5. CHECK BATTERY POWER

Check the following:
- Battery
- Harness for open or short between battery and 10A fuse (No. 2)
- 10A fuse (No. 2)
- Harness for open or short between 10A fuse (No. 2) and heated steering wheel relay
Is the inspection result normal?
YES- GO TO 6.
NO- Repair harness or connector.

6. CHECK HARNESS BETWEEN A/C AUTO AMP. AND HEATED STEERING WHEEL SWITCH

1.Check continuity between A/C Auto amp. harness connector M152 and heated steering wheel switch harness connector M51.





2.Check continuity between A/C Auto amp. harness connector M152 and ground.





Is the inspection result normal?
YES- GO TO 7.
NO- Repair or replace the harness or connectors.

7. CHECK HEATED STEERING WHEEL SWITCH

Check heated steering wheel switch. Refer to "Component Inspection (Heated Steering Wheel Switch)" Heated Steering Wheel System.
Is the inspection result normal?
YES- Replace A/C Auto amp. Refer to "Removal and Installation" Removal And Installation.
NO- Replace heated steering wheel switch.