2000 Models
WARNING: This page is about a different car, the 2001 Pontiac Bonneville and 2000 Pontiac Bonneville. However, it is still accessible from the selected car via links, so may be relevant.
- Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK under TROUBLE SHOOTING and go to next step.
- Connect scan tool and turn ignition on. Use scan tool to perform RECALIBRATE ALL MOTORS in INSTRUMENT PANEL MODULE SPECIAL FUNCTIONS. If scan tool displays any DTCs see DIAGNOSTIC TROUBLE CODE IDENTIFICATION table under SELF-DIAGNOSTICS. If no DTCs were displayed, go to next step.
- Check for discharged battery or battery in poor condition. If poor or discharged battery was found and condition was corrected, go to step 6 . If poor or discharged battery condition was not found, go to next step.
- Visually inspect for a stuck or intermittent sticking switch on A/C-heater control unit, caused by bad trim plate fit. If a problem was found and repaired, go to step, 6 . If a problem was not found, go to next step.
- Start engine. Ensure all instrument panel outlets are open. Operate system. If system operates properly, go to next step. If system does not operate properly, perform appropriate symptom test.
- Operate system to verify proper operation. If system is not okay, go back to step 2 .