Chime Always On

Chime Always On

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provide an overview of each diagnostic category.

Circuit/System Description

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) or the body control module (BCM).

Circuit/System Testing

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 ON, headlamp switch OFF, verify the scan tool Headlamp Switch parameter is Inactive.

• If not Inactive, refer to Headlamp Low or High Beams Always On.



2. Ignition ON, doors closed, verify the scan tool All Door Lock Command is On.

• If not On, refer to Courtesy Lamps Always On.

3. Verify that the Key In Ignition Cylinder Switch parameter is YES when the key is in the ignition and NO when the key is out of the ignition..

• If not the specificed value, test the signal circuit for a short to voltage or an open/high resistance. If the circuits tests normal, replace the ignition switch.

4. If all circuits are normal, test or replace the IPC.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

* Ignition and Start Switch Replacement
* Refer to Programming and Relearning. Programming and Relearning