The radio generates the audible warning through the left speaker. The radio receives audible warning requests via the serial data circuit from the instrument panel cluster (IPC) or the body control module (BCM).

Schematic Reference

Audible Warnings Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Audible Warnings Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

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

⇒	If not Inactive, refer to Headlamps Malfunction.

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

⇒	If not On, refer to Courtesy Lamps Malfunction.

3. Ignition ON, radio ON, adjust the radio balance and fade to the left front speaker.

⇒	If the speaker does not operate properly, refer to Speaker Malfunction

4. 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.

1. Ignition OFF, disconnect the harness connector at the key in ignition switch.
2. Ignition ON, test for 4.8 - 5.2 V between the 5V reference circuit terminal 6 and ground.

⇒	If less than the specified range, test the 5V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.

⇒	If greater than the specified range, test the 5V reference circuit for a short to voltage. If the circuit tests normal, replace the BCM.

3. Verify the BCM scan tool Key In Ignition Cylinder Switch parameter is No.

⇒	If not the specified value, test the signal circuit terminal 5 for a short to voltage. If the circuit tests normal, replace the BCM.

4. Install a 3A fused jumper wire between the signal circuit terminal 5 and the 5V reference circuit terminal 6. Verify the scan tool Key In Ignition Cylinder Switch parameter displays Yes.

⇒	If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the BCM.

5. If all circuits test normal, test or replace the ignition switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.