Key-In-Ignition Warning
The BCM sends a class 2 message to the radio or the chime module (UL5) to activate the key-in-ignition audible warning when the BCM detects that the key is in the ignition with the driver door open. The key-in-ignition chime sounds at the medium rate of 150 pulses per minute until the driver door is closed or the key is removed from the ignition switch.