Inspection Procedure 1: Steering wheel remote control switch (audio remote control switch) does not function. <Vehicles with radio and CD player>




TECHNICAL DESCRIPTION (COMMENT)


The power supply circuit to the steering wheel remote control switch (audio remote control switch), the steering wheel remote control switch, the radio and CD player, or the clock spring may be defective.

TROUBLESHOOTING HINTS



  • Malfunction of steering wheel remote control switch
  • Malfunction of radio and CD player
  • Malfunction of the clock spring
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. Check the steering wheel remote control switch.


Check the steering wheel remote control switch (Refer to ).

Q. Is the check result normal?

Go to Step 2.
Replace the steering wheel remote control switch.

STEP 2. Check the clock spring.


Check whether the clock spring is in good condition. Refer to GROUP 52B - Air bag module and clock spring .

Q. Is the check result normal?

Go to Step 3.
Replace the clock spring.

STEP 3. Check of short to power supply, short to earth, and open circuit in REM+, REM- line between radio and CD player connector and steering wheel remote control switch connector


Q. Is the check result normal?

Go to Step 4.
Repair the connector(s) or wiring harness.

STEP 4. Retest the system


Check whether you can operate the radio and CD player by using the steering wheel remote control switch.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the radio and CD player.