Chime Inoperative

CHIME INOPERATIVE




DIAGNOSTIC FAULT INFORMATION

IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Testing and Inspection

CIRCUIT/SYSTEM DESCRIPTION
The body control module (BCM) monitors the ignition key alarm switch. When the key is in the ignition, the ignition key alarm switch is closed with the signal circuit low. When the key is not in the ignition, the ignition key alarm switch is open with the signal circuit high. The key in ignition signal circuit is grounded when you fully insert the ignition key into the ignition switch. This in turn pulls the BCM key-in-ignition input low. The radio generates the audible warning through the left speaker. The radio receives audible warning requests via GMLAN serial data from the instrument panel cluster (IPC).

CIRCUIT/SYSTEM TESTING

IMPORTANT: Before performing this diagnostics, make sure no indicator(s) 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. With the ignition OFF and the key in the ignition, open the driver door.
- The chime should sound when driver door is opened.
2. With the ignition ON, install a scan tool and observe the Driver Door Ajar Switch parameter in the BCM Inputs Data List.
- If the scan tool does not display Door Ajar, refer to Symptoms - Doors. - Symptoms - Doors
3. Turn the parklamp switch ON and observe the Parklamp Switch parameter in the BCM Inputs Data List.
- If the scan tool displays OFF, refer to Park, License, and Tail Lamps Inoperative. Park, License, and Tail Lamps Inoperative
4. Turn the ignition OFF, with the key still in the ignition key cylinder.
5. Open the driver door.
6. 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.
7. With the ignition ON, turn ON the radio and adjust the radio balance and fade of the speakers.
- If the speaker operates properly, replace the radio.
- If the speaker does not operate properly, refer to Speakers Inoperative - One or More. Speakers Inoperative - One or More

REPAIR INSTRUCTIONS

IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- Ignition Switch Replacement
- Control Module References for the radio replacement, setup and programming