Key In Ignition Reminder

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