Circuit/System Testing
WARNING: This page is about a different car, the 2006 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
Note: Diagnose all vehicle DTCs before using this diagnostic.
With the scan tool, select instrument panel special functions Lamp Test. Command the instrument panel lamps OFF. Verify TC lamp turns OFF.
- If the TC warning lamp does not turn OFF, replace the IPC.