DTC B2965: Key In Ignition Fault: Testing
- If body control system diagnostic system check has been performed, go to next step. If body control system diagnostic system check has not been performed, go to BODY CONTROL SYSTEM DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
- Connect scan tool to Data Link Connector (DLC). Turn ignition on. Observe KEY-IN-IGNITION input on BCM data list. If scan tool displays YES, go to DIAGNOSTIC AIDS . If scan tool does not display YES, go to next step.
- Turn ignition off. Disconnect BCM connector C2. Turn ignition on. Connect a test light between battery positive terminal and BCM harness connector C2 terminal B12 (Light Green wire). See Figure . If test light comes on, go to step 5 . If test light does not come on, go to next step.
- Check for open in Light Green wire between BCM and ignition switch. Check for open in Black/White wire between ignition switch and ground point G202. See GROUND DISTRIBUTION article in WIRING DIAGRAMS. Repair as necessary and go to step 9 . If circuits are okay, go to step 6 .
- Check for poor connections at BCM connector. Repair as necessary and go to step 9 . If connector is okay, go to step 7 .
- Check for poor connections at ignition switch connector. Repair as necessary and go to step 9 . If connector is okay, go to step 8 .
- Replace BCM. See BODY CONTROL MODULE under REMOVAL & INSTALLATION. After repairs, go to step 9 .
- Replace ignition switch. See appropriate ANALOG INSTRUMENT PANELS article. After repairs, go to next step.
- Using scan tool, clear DTCs. Turn ignition off and on. Wait 20 seconds, and retrieve DTCs. If DTC B2965 resets, go to step 2 . If DTC does not reset, system is okay at this time.