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Inspection Procedure 3: The illumination of the steering wheel audio remote control switch does not come on.
 
 
cautionBefore replacing the audio equipment or steering wheel audio remote control switch, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
 
 
TECHNICAL DESCRIPTION (COMMENT)
The power supply circuit to the steering wheel audio remote control switch, the steering wheel audio remote control switch, the combination meter, or the clock spring may be defective.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of steering wheel audio remote control switch
  • Malfunctions of combination meter
  • Malfunction of the clock spring
  • Damaged harness wires and connectors
 
 
 
DIAGNOSIS
STEP 1. Check the combination meter.
Check whether the combination meter works normally.
Does the combination meter operate normally?
Go to Step 2.
Diagnose the combination meter. (Refer to .)
 
STEP 2. Check steering wheel audio remote control switch connector C-317 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Is steering wheel audio remote control switch connector C-317 in good condition?
Go to Step 3.
Repair or replace the damaged component(s). Refer to GROUP 00E, Harness Connector Inspection .
 
STEP 3. Check the wiring harness between steering wheel audio remote control switch connector C-317 (terminal 4) and ground.
  • Check the ground wire for open circuit.
Is the wiring harness between steering wheel audio remote control switch connector C-317 (terminal 4) and ground in good condition?
Go to Step 4.
The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
 
STEP 4. Check clock spring connectors C-304 and C-312 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Are clock spring connectors C-304 and C-312 in good condition?
Go to Step 5.
Repair or replace the damaged component(s). Refer to GROUP 00E, Harness Connector Inspection .
 
STEP 5. 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 .
Is the check result normal?
Go to Step 6.
Replace the clock spring.
 
STEP 6. Check the wiring harness between steering wheel audio remote control switch connector C-317 (terminal 3) and clock spring connector C-304 (terminal 5).
  • Check the power supply lines for open and short circuit.
Is the wiring harness between steering wheel audio remote control switch connector C-317 (terminal 3) and clock spring connector C-304 (terminal 5) in good condition?
Go to Step 7.
The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
 
STEP 7. Check combination meter connector C-203 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Is combination meter connector C-203 in good condition?
Go to Step 8.
Repair or replace the damaged component(s). Refer to GROUP 00E, Harness Connector Inspection .
 
STEP 8. Check the wiring harness between combination meter connector C-203 (terminal 23) and clock spring connector C-312 (terminal 5).
  • Check the power supply lines for open and short circuit.
noteAlso check joint connector C-04 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If joint connector C-04 is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection .
Is the wiring harness between combination meter connector C-203 (terminal 23) and clock spring connector C-312 (terminal 5) in good condition?
  • Go to Step 9.
The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
 
STEP 9. Retest the system
Check whether the illumination of the steering wheel audio remote control switch comes on normally.
Doe the illumination of the steering wheel audio remote control switch comes on normally?
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 steering wheel audio remote control switch.