Diagnostic procedure
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STEP
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INSPECTION
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ACTION
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|
|---|---|---|---|
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1
|
INSPECT LIGHT SWITCH CONNECTOR
• Disconnect the light switch connector.
• Inspect the light switch connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
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Yes
|
Repair or replace the terminal, then go to Step 5.
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|
No
|
Go to the next step.
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|
2
|
INSPECT BCM CONNECTOR
• Disconnect the BCM connector.
• Inspect the BCM connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
|
Yes
|
Repair or replace the terminal, then go to Step 5.
|
|
No
|
Go to the next step.
|
||
|
3
|
INSPECT LIGHT SWITCH SIGNAL CIRCUIT FOR SHORT TO GND
• Inspect for continuity between following terminals:
• Is there continuity?
|
Yes
|
Repair or replace the wiring harness for a possible short to GND, then go to Step 5.
|
|
No
|
Go to the next step.
|
||
|
4
|
INSPECT LIGHT SWITCH
• Inspect the light switch.
• Is there any malfunction?
|
Yes
|
Replace the light switch, then go to the next step.
(See LIGHT SWITCH INSPECTION.)
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|
No
|
Go to the next step.
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|
5
|
VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the BCM memory using the WDS or equivalent.
• Is the same DTC present?
|
Yes
|
Replace the BCM.
|
|
No
|
DTC troubleshooting completed.
|
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