Inspection Procedure 1: Steering Remote Control Switch does not Function. <Vehicles with radio and CD player>












TECHNICAL DESCRIPTION (COMMENT)



TROUBLESHOOTING HINTS



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

DIAGNOSIS PROCEDURE

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


Check whether the service data below are normal. (Refer to .)
(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 remote SW (SEEK-)
 ON
Item 2
 RADIO remote SW (SEEK+)
 ON
Item 3
 RADIO remote SW (MODE)
 ON
Item 4
 RADIO remote SW (VOL-)
 ON
Item 5
 RADIO remote 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 check result normal?
Go to Step 3.
Replace the remote controlled radio switch.

STEP 3. Connector check: C-204 and C-205 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-103 radio and CD player connector

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

STEP 6. Check the wiring harness between C-103 radio and CD player connector terminal No.22, 32 and C-205 clock spring connector terminal No.2, 3.

  • 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-202 steering wheel audio remote control switch connector terminal No.2, 4 and C-204 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 radio and CD player 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 radio and CD player.