Entering Diagnostics

1. In order to enter diagnostics the MALL PGM Fuse must be pulled.
2. Turn the Ignition Switch to "ACCESSORY."
3. The Seat Belt Indicator and the Chime will activate (flash and chime) 2-4 times indicating which type of Body Control Module (BCM) is in the vehicle. Check that the BCM in the vehicle is compatible with all of the features on the vehicle. If not place the proper BCM in the vehicle.
^ At this point the vehicle is in the Feature Customization Mode and the Interior Lighting, Automatic Door Lock, Last Door Closed and Lockout Deterrent, Remote Drivers Door Unlock Control, Remote Lock and Unlock Confirmation, Remote Activation Verification, Content Theft Deterrent/Shock Sensor Control, and the Content Theft Deterrent Arming and Disarming can be customized. Refer to procedures.
Testing and Inspection
Locks
Antitheft and Alarm Systems
4. Turn the Ignition Switch "LOCK" and then to "ACCESSORY" within 1 second.
5. The Diagnostic Codes (DTC's) may flash and chime simultaneously from 1 to 8 times equaling that Diagnostic trouble code.
^ Diagnostic trouble codes will be stored for 10 years unless erased.
^ If there are codes in memory record them and then erase the codes. To erase the codes press and hold any Door "UNLOCK" switch for 4 seconds.
^ Exit diagnostics.
^ With the codes that have been recorded test there functionality.
^ Reenter diagnostics and see if these codes exist. If they do see symptom table for appropriate DTC code.
6. If there is more than one trouble code in memory the codes will be flashed in sequence pausing for 2 seconds between each code. These codes will repeat 3 times.
7. If Diagnostics cannot be accessed try entering Diagnostics once again. If Diagnostics are still not accessed see for Cannot Enter Diagnostics. System Diagnostic Charts