Step  | Action  | Yes  | No  | 
|---|---|---|---|
1  | Retrieve and display DTCs by entering the BCM diagnostic mode. Refer to On-Board Diagnostic Features . Did you enter Diagnostic Mode and retrieve DTCs from the body control module?  | Go to Step 2  | |
2  | Did you retrieve both DTCs 12 and 55?  | Go to Step 3  | |
3  | Did you retrieve both DTCs 25 and 35?  | Go to Step 5  | Go to Step 4  | 
4  | Did you retrieve DTC 35 with no DTC 25?  | Go to Diagnostic Trouble Code (DTC) List in Theft Deterrent  | Go to Step 5  | 
5  | Did you retrieve any DTCs other than 12, 25/35, 55 and configuration ID numbers?  | Go to the Diagnostic System Check of the system exhibiting symptoms. Refer to Control Module References  |