Inspection Procedure 1: Steering Wheel Audio Remote Control Switch does not Function. <Vehicles with MMCS>












TECHNICAL DESCRIPTION (COMMENT)



TROUBLESHOOTING HINTS



  • Malfunction of steering wheel audio remote control switch
  • Malfunctions of multivision display
  • Malfunction of the clock spring
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the steering wheel audio remote control switch.
Check the steering wheel audio remote control switch (Refer to ).

Q. Is the check result normal?
Go to Step 2.
Replace the remote controlled radio switch.

STEP 2. Connector check: C-202 steering wheel audio remote control switch connector

Q. Is the check result normal?
Go to Step 3.
Repair the defective connector.

STEP 3. Connector check: C-205 and C-204 clock spring connector

Q. Is the check result normal?
Go to Step 4.
Repair the defective connector.

STEP 4. Check the clock spring.
Check whether the clock spring is in good condition (Refer to GROUP 52B - Driver’s Air bag module and clock spring <Except RALLIART> or <RALLIART>).

Q. Is the check result normal?
Go to Step 5.
Replace the clock spring.

STEP 5. Connector check: C-142 multivision display connector

Q. Is the check result normal?
Go to Step 6.
Repair the defective connector.

STEP 6. Check the wiring harness between C-142 multivision display connector terminal No.53, 69 and C-205 clock spring connector terminal No.2, 3.
note Prior to the wiring harness inspection, check intermediate connector C-139, and repair if necessary.

  • Check the communication lines for open circuit or short circuit.

Q. Is the check result normal?
Go to Step 7.
Repair the wiring harness.

STEP 7. Connector check: C-202 steering wheel audio remote control switch connector

Q. Is the check result normal?
Go to Step 8.
Repair the defective connector.

STEP 8. Check the wiring harness between C-213 steering wheel audio remote control switch connector terminal No.2, 4 and C-202 clock spring connector terminal No.5, 4.

  • Check the communication lines for open circuit or short circuit.

Q. Is the check result normal?

    Go to Step 9.
Repair the wiring harness.

STEP 9. Retest the system
Check whether you can operate the multivision display by using the steering wheel audio 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.