Inspection Procedure 3

Inspection Procedure 3: Steering wheel audio remote control switch illumination does not come on.

Steering Wheel Audio Remote Control Switch Illumination Circuit:

TECHNICAL DESCRIPTION (COMMENT)

The power supply circuit to the steering wheel audio remote control switch, the steering wheel audio remote control switch, the combination meter, or the clock spring may be defective.

TROUBLESHOOTING HINTS

- Steering wheel audio remote control switch may be defective
- Combination meter may be defective
- Clock spring may be defective
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

Required Special Tools:
- MB991223: Harness Set
- MB992006: Extra Fine Probe

STEP 1. Check steering wheel audio remote control switch connector C-202 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is steering wheel audio remote control switch connector C-202 in good condition?

YES : Go to Step 2.

NO : Repair the defective connector.

STEP 2. Check the power supply circuit to the wheel audio remote control switch. Measure the voltage at wheel audio remote control switch connector C-202.

1. Disconnect the connector, and measure at the wiring harness-side connector.
2. Turn the ignition switch to the "ACC" position, and turn the taillight switch to the "ON" position.







3. Measure the voltage between terminal 1 and ground.

OK: Battery positive voltage

Q: Is the measured voltage battery positive voltage?

YES : Go to Step 3.

NO : Go to Step 5.

STEP 3. Check the wiring harness between steering wheel audio remote control switch connector C-202 (terminal 5) and ground.

- Check the ground wire for open circuit.

Q: Is the wiring harness between steering wheel audio remote control switch connector C-202 (terminal 5) and ground in good condition?

YES : Go to Step 4.

NO : The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.

STEP 4. Check the steering wheel audio remote control switch.

Check the illumination of the steering wheel audio remote control switch. Component Tests and General Diagnostics

Q: Is the check result normal?

YES : Go to Step 10.

NO : Replace the steering wheel audio remote control switch.

STEP 5. Check clock spring connectors C-204 and C-205 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are clock spring connectors C-204 and C-205 in good condition?

YES : Go to Step 6.

NO : Repair or replace the damaged component.

STEP 6. Check the clock spring.

Check whether the clock spring is in good condition (Refer to Driver's Air Bag Module and Clock Spring [EXCEPT RALLIART] or [RALLIART]). Driver's Air Bag Module and Clock Spring

Q: Is the check result normal?

YES : Go to Step 7.

NO : Replace the clock spring.

STEP 7. Check the wiring harness between steering wheel audio remote control switch connector C-202 (terminal 1) and clock spring connector C-204 (terminal 1).

- Check the power supply line for open circuit and short circuit.

Q: Is the wiring harness between steering wheel audio remote control switch connector C-202 (terminal 1) and clock spring connector C-204 (terminal 1) in good condition?

YES : Go to Step 8.

NO : The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.

STEP 8. Check combination meter connector C-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is combination meter connector C-04 in good condition?

YES : Go to Step 9.

NO : Repair or replace the damaged component.

STEP 9. Check the wiring harness between combination meter connector C-04 (terminal 23) and clock spring connector C-205 (terminal 6).

- Check the power supply line for open circuit and short circuit.

Q: Is the wiring harness between combination meter connector C-04 (terminal 23) and clock spring connector C-205 (terminal 6) in good condition?

YES : Go to Step 10.

NO : The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.

STEP 10. Retest the system

Check whether the illumination of the steering wheel audio remote control switch comes on normally.

Q: Is the check result normal?

YES : The trouble can be an intermittent malfunction (Refer to How to use Troubleshooting/inspection Service Points, How to Cope with Intermittent Malfunction).

NO : Replace the steering wheel audio remote control switch.