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Inspection Procedure 2: Steering wheel remote control switch illumination does not come on.
 
 
 
 
TECHNICAL DESCRIPTION (COMMENT)
The power supply circuit to the steering wheel remote control switch, the steering wheel remote control switch, the combination meter, or the clock spring may be defective.
 
 
 
TROUBLESHOOTING HINTS
  • The steering wheel remote control switch may be defective
  • The combination meter may be defective
  • The clock spring may be defective
  • The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
 
 
 
 
DIAGNOSIS
Required Special Tools:
  • MB991223: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Check the steering wheel remote control switch.
Check the steering wheel remote control switch (Refer to ).
Is the check result normal?
Go to Step 2.
Replace the steering wheel remote control switch.
 
STEP 2. Resistance measurement at steering wheel remote control switch connector (ground terminal)
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the steering wheel remote control switch connector (ground terminal) and ground.
OK: The resistance should be 2 ohms or less
Is the check result normal?
Go to Step 4.
Go to Step 3.
 
STEP 3. Check of open circuit in ground line between steering wheel remote control switch connector and ground
Is the check result normal?
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the connector(s) or wiring harness.
 
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 .
Is the check result normal?
Go to Step 5.
Replace the clock spring.
 
STEP 5. Check of short to power supply, short to ground, and open circuit in ILL+ line between combination meter connector and steering wheel remote control switch connector
Is the check result normal?
Go to Step 6.
Repair the connector(s) or wiring harness.
 
STEP 6. Retest the system
Check whether the illumination of the steering wheel remote control switch comes on normally.
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 combination meter.