Inspection Procedure 1: Steering Wheel Audo Remote Control Switch does not Function. <Vehicles without MMCS>















TECHNICAL DESCRIPTION (COMMENT)


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

TROUBLESHOOTING HINTS




DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III data list


Check whether the service data below are normal.
(1)Turn the ignition switch to "ON" position.
(2)Operate each switch of the steering remote control. Check whether the normal conditions listed below are displayed.
Item No.
Item name
Normal condition
Item 1
RADIO remoto SW (SEEK-)
ON
Item 2
RADIO remoto SW (SEEK+)
ON
Item 3
RADIO remoto SW (MODE)
ON
Item 4
RADIO remoto SW (VOL-)
ON
Item 5
RADIO remoto SW (VOL+)
ON
OK: Normal condition is displayed.

Q. Is the check result normal?

Replace the audio unit.
Go to Step 2.

STEP 2. Check the steering wheel audio remote control switch.


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

Q. Is the hood switch in good condition?

Go to Step 3.
Replace the remote controlled radio switch.

STEP 3. Connector check: C-202 and C-204 clock spring connector


Q. Is the hood switch in good condition?

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 - Air bag module and clock spring ).

Q. Is the check result normal?

Go to Step 5.
Replace the clock spring.

STEP 5. Connector check: C-18 audio unit connector


Q. Is the hood switch in good condition?

Go to Step 6.
Repair the defective connector.

STEP 6. Check the wiring harness between C-18 audio unit connector terminal No.22, 32 and C-204 clock spring connector terminal No.2, 3.



  • Check the communication lines for open or short circuit.

Q. Is the hood switch in good condition?

Go to Step 7.
Repair the wiring harness.

STEP 7. Connector check: C-213 steering wheel audio remote control switch connector


Q. Is the hood switch in good condition?

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 or short circuit.

Q. Is the hood switch in good condition?


    Go to Step 9.
Repair the wiring harness.

STEP 9. Retest the system


Check whether you can operate the audio unit by using the steering remote control.

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 audio unit.