Key-In-Ignition Warning

The audio amplifier activates the key-in-ignition audible warning as requested by the instrument panel cluster (IPC). The IPC sends a serial data message to the radio indicating the chime frequency and duration. The key-in-ignition warning sounds when the following occurs:

• The ignition switch is OFF.
• The BCM determines that the driver door is open. The IPC also receives a serial data message from the BCM indicating the door ajar status
• The BCM determines that the key-in-ignition switch is open. The IPC receives a serial data message from the BCM indicating the key-in-ignition status.