The instrument panel cluster (IPC) generates the audible warning through an acoustic chime generator in the IPC. The IPC receives audible warning requests via the serial data circuit from the body control module (BCM).

Schematic Reference

Connector End View Reference

Electrical Information Reference

Scan Tool Reference

Scan Tool Data List for scan tool information

Important: Before performing this diagnostics, make sure no indicators are illuminated after the IPC performs a lamp test. If any indicators are illuminated after the bulb test, perform the indicator diagnostics before this diagnostics.

1. Ignition OFF, key in the ignition and open the driver door. The courtesy lamps should illuminate.

⇒	If the courtesy lamps do not illuminate, refer to Courtesy Lamps Inoperative .

2. Ignition ON, verify that the scan tool Key In Ignition Cylinder Switch Status parameter is YES.

⇒	If not YES, test the signal circuit for a short to voltage or an open/high resistance. If all circuits test normal, replace the ignition switch.

3. If all circuits test normal, test or replace the IPC.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.