Heated Steering Wheel System

HEATED STEERING WHEEL SYSTEM

Component Function Check


1. CHECK HEATED STEERING WHEEL SYSTEM

Check operate heated steering wheel system. System Description (Heated Steering Wheel).
Is the inspection result normal?
YES- Go to .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK POWER SOURCE AND GROUND CIRCUIT

1.Turn ignition switch OFF.
2.Remove the heated steering wheel. Removal And Installation.
3.Turn ignition switch ON.

CAUTION:
Never start the engine.
4.Turn heated steering wheel switch ON.
5.Check voltage between heated steering wheel harness connector terminals.





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

2. CHECK HEATED STEERING WHEEL

Check heated steering wheel. .
Is the inspection result normal?
YES- INSPECTION END
NO- Replace heated steering wheel. Removal And Installation.

3. CHECK GROUND CIRCUIT

Check continuity between heated steering wheel harness connector terminal and ground.





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

4. CHECK HARNESS BETWEEN HEATED STEERING WHEEL RELAY AND HEATED STEERING WHEEL

1.Turn ignition switch OFF.
2.Disconnect heated steering wheel relay connector. Locations.
3.Disconnect heated steering wheel switch connector. Removal And Installation.
4.Check continuity between heated steering wheel relay harness connector terminal and heated steering wheel harness connector terminal.





5.Check continuity between heated steering wheel relay harness connector terminal and ground.





Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace damaged parts.

5. CHECK HEATED STEERING WHEEL RELAY

Check heated steering wheel relay. .
Is the inspection result normal?
YES- GO TO 6.
NO- Replace heated steering wheel relay. Locations.

6. DETECT MALFUNCTIONING ITEM

Check the following.
- Battery
- Harness for short or open between battery and 10A fuse. Battery Power Supply.
- 10A fuse (No.76). Fuse, Fusible Link And Relay Box.
- Harness for short or open between 10A fuse and heated steering wheel relay.
Is the inspection result normal?
YES- GO TO 7.
NO- Repair or replace damaged parts.

7. CHECK GROUND CIRCUIT

Check continuity between heated steering wheel switch harness connector terminal and ground.





Is the inspection result normal?
YES- GO TO 8.
NO- Repair or replace damaged parts.

8. CHECK HARNESS BETWEEN HEATED STEERING WHEEL RELAY AND HEATED STEERING WHEEL

SWITCH
1.Check continuity between heated steering wheel relay harness connector terminal and heated steering wheel switch harness connector terminal.





2.Check continuity between heated steering wheel relay harness connector terminal and ground.





Is the inspection result normal?
YES- GO TO 9.
NO- Repair or replace damaged parts.

9. CHECK HARNESS BETWEEN FUSE BLOCK (J/B) AND HEATED STEERING WHEEL SWITCH

1.Check continuity between fuse block (J/B) connector terminal and heated steering wheel switch harness connector terminal.





2.Check continuity between fuse block (J/B) harness connector terminal and ground.





Is the inspection result normal?
YES- GO TO 10.
NO- Repair or replace damaged parts.

10. DETECT MALFUNCTIONING ITEM

Check the following.
- Ignition switch
- Harness for short or open between ignition switch and fuse block (J/B). Ignition Power Supply Fuse No. 3.
- 10A fuse [No.3, located in the fuse block (J/B)]. Fuse, Connector And Terminal Arrangement.
- Fuse block (J/B)
Is the inspection result normal?
YES- Replace heated steering wheel switch. Removal And Installation.
NO- Repair or replace damaged parts.


Component Inspection (Heated Steering Wheel)


1. CHECK HEATED STEERING WHEEL CONTINUITY

Check continuity between heated steering wheel connector terminals.





Is the inspection result normal?
YES- GO TO 2.
NO- Replace heated steering wheel. Removal And Installation.

2. CHECK HEATED STEERING WHEEL RESISTANCE

Check resistance between heated steering wheel connector terminals.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace heated steering wheel. Removal And Installation.


Component Inspection (Heated Steering Wheel Relay)


1. CHECK HEATED STEERING WHEEL RELAY CONTINUITY

Check continuity between heated steering wheel relay terminals.

CAUTION:
Connect the fuse between the terminals when applying the voltage.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace heated steering wheel relay. Locations.