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  | Perform the Displaying DTC Codes procedure in order to enter the diagnostic mode and display any DTCs. Refer to On-Board Diagnostic Features in Body Control Systems. Did you enter Diagnostic Mode ?  | Go to Step 2  | Go to Body Control Module Inoperative in Body Control System  | ||||
2  | Does the BCM flash any of the following codes: 
 
  | Go to Step 3  | |||||
3  | Does the Body Control Module (BCM) display or sound any other DTCs?  | Go to Diagnostic Trouble Code (DTC) List in Body Control System  | |||||