Chime Always On

CHIME ALWAYS ON




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. Turn the ignition ON.
2. Remove the key from the ignition.
3. Turn the headlamp switch OFF and open the driver door.
- If the chime does not sound, check for poor connections at the harness connector of the radio.
4. With the ignition ON, install a scan tool and observe the Park Lamp Switch parameter in the BCM Inputs Data List.
- The scan tool should display Inactive, if the scan tool displays active refer to Park, License, and Tail Lamps Always On. Park, License, and Tail Lamps Always On
5. With the ignition ON, install a scan tool and observe the Headlamp Switch parameter in the BCM Inputs Data List.
- The scan tool should display Inactive, but if the scan tool displays active refer to Headlamps Always On - Low or High Beam. Headlamps Always On - Low or High Beam
6. With the ignition ON, install a scan tool and observe the Key-in-Ignition Switch parameter in the BCM Inputs Data List.
- If the Key-in-Ignition Switch parameter displays Inactive, check the key-in-ignition switch signal circuit for a short to ground.
- If the key-in-ignition switch circuit tests normal, replace the key-in-ignition switch.

REPAIR INSTRUCTIONS

IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Ignition Switch Replacement