Key-In-Ignition Warning

The radio activates the key-in-ignition audible warning as requested by the body control module (BCM). The BCM sends a GMLAN 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 BCM determines that the driver door is open (signal circuit is low).
• The BCM determines that the ignition key alarm switch is closed (signal circuit is low).