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


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 multivision display, or the clock spring may be defective.

TROUBLESHOOTING HINTS

  • Malfunction of steering wheel remote control switch
  • Malfunction of multivision display
  • 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 multivision display 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 multivision display 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 multivision display.