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 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 Headlamps Malfunction.

2. Ignition ON, park lamp switch OFF, verify the scan tool Park Lamps Switch parameter is Inactive.

⇒	If not Inactive refer to Park, License, and/or Tail Lamps Malfunction.

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

⇒	If not On, refer to Courtesy Lamps Malfunction.

4. 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.

5. Verify that the Key In Ignition Status parameter is Key In when the key is in the ignition and Key Out when the key is out of the ignition.

1. Ignition OFF, disconnect the harness connector at the key in ignition switch.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal listed below and ground.

•	B+ Terminal 3 (LE5)

•	B+ Terminal 2 (- LE5)

⇒	If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition switch fuse is open, test the signal circuit terminal listed below for a short to ground.

•	Signal Terminal 5 (LE5)

•	Signal Terminal 4 (- LE5)

3. Verify the BCM scan tool Key In Ignition Status parameter is Key Out.

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

•	Signal Terminal 5 (LE5)

•	Signal Terminal 4 (- LE5)

4. Install a 3A fused jumper wire between the key in ignition switch signal circuit terminal and the B+ circuit terminal listed below. Verify the BCM scan tool Key In Ignition Cylinder Switch parameter is Key In.

•	B+ Terminal 3 (LE5)

•	B+ Terminal 2 (- LE5)

•	Signal Terminal 5 (LE5)

•	Signal Terminal 4 (- LE5)

⇒	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.

Ignition and Start Switch Replacement