Step | Action | Yes | No | ||||
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Important: The Lighting Diagnostic System Check applies to courtesy/illuminated entry lamps only. Upon verifying the condition, if it is determined that the condition exists in exterior lighting or interior lamps dimming, go to the Symptoms - Lighting Systems . | |||||||
1 | Retrieve and display DTCs by entering the BCM diagnostic mode. Refer to On-Board Diagnostic Features in Body Control System. Did you enter Diagnostic Mode and retrieve DTCs from the body control module? | Go to Step 2 | Go to Cannot Enter BCM Diagnostics in Body Control System | ||||
2 | Did you retrieve both DTCs 12 and 55? | Go to Step 3 | Go to Cannot Enter BCM Diagnostics in Body Control System | ||||
3 | Does the BCM flash any of the following codes:
| Go to Step 4 | |||||
4 | Does the BCM flash any other current or history DTCs? | Go to Diagnostic Trouble Code (DTC) List in Body Control System | |||||
