Circuit/System Testing

With the ignition ON, make sure no indicator(s) are illuminated in the instrument panel cluster (IPC) and perform the indicator diagnostic first if any indicator(s) are illuminated before performing the following diagnostics.
Open the driver door.
With the ignition ON install a scan tool and observe the Driver Door Ajar Switch parameter in the BCM Doors Data List.
- If the scan tool does not display Door Ajar, refer to Symptoms - Doors .
Turn the parklamp switch ON and observe the Parklamp Switch parameter in the BCM Exterior Lights Data List.
- If the scan tool displays OFF, refer to Park, License, and Tail Lamps Inoperative .
Turn ON the radio and adjust the radio balance and fade to the left front speaker.
- If the radio speakers are not operating properly, refer to Speakers Inoperative - One or More .
Turn the ignition OFF, with the key still in the ignition key cylinder.
Open the driver door.
Turn on the parklamp and the headlamp.
- If the chime does not sound, check the key-in-ignition signal circuit for an open, a high resistance or a short to voltage.

If the key-in-ignition signal circuit test normal, check the key-in-ignition ground circuit for an open or a high resistance.

If the key-in-ignition ground circuit tests normal, replace the key-in-ignition switch.