Key In Ignition Reminder

The radio activates the key-in-ignition audible warning as requested by the Body Control Module (BCM). The BCM sends a class 2 message to the radio indicating the chime of a medium rate frequency and a continuous duration. The key-in-ignition warning sounds when the following occurs:
^ The ignition switch is OFF.
^ The Body Control Module (BCM) determines that the driver door is open and the signal circuit is low.
^ The BCM determines that the key-in-ignition switch is closed and the signal circuit is low.