System Tests
- Ensure all components are connected. Turn ignition switch to RUN position (engine off). Connect a scan tool and check if scan tool communicates with Body Function Controller (BFC). See appropriate TESTS W/CODES
article in ENGINE PERFORMANCE section.
If scan tool communicates with BFC, go to next step. If scan tool does not communicate with BFC, inspect Data Link Connector (DLC), repair as necessary and go to next step.
- Using scan tool menu in Body Function mode, read BFC DTCs. See scan tool manufacturer's instructions. If any current DTCs are set, go to appropriate DTC diagnostic procedure. See DIAGNOSTIC TROUBLE CODES (DTC) If no DTCs are set go to next step.
- Turn ignition off. Remove scan tool from DLC and turn ignition switch to RUN position (engine off). If THEFT SYSTEM indicator turns on then off, go to step 5). If THEFT SYSTEM indicator does not turn on then off, go to next step.
- If THEFT SYSTEM indicator does not stay on or flash, go to next step. If THEFT SYSTEM indicator does stay on or flash, replace and program BFC. See REPROGRAMMING BFC in appropriate BODY CONTROL MODULE article. Attempt to start engine. If THEFT SYSTEM indicator still stays on, after BFC has been replaced and engine starts; reprogram Powertrain Control Module (PCM) to relearn Theft Deterrent System Password. See PASSWORD LEARN PROCEDURE under PROGRAMMING. If THEFT SYSTEM indicator still flashes and no DTCs are set, replace and reprogram Instrument Panel Cluster (IPC). See PASSWORD LEARN PROCEDURE under PROGRAMMING.
- Using scan tool check for history DTCs. If there are any history DTCs, refer to appropriate DTC diagnostic procedure. See DIAGNOSTIC TROUBLE CODES (DTC) .