Key-In-Ignition Warning
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
The audio amplifier activates the key-in-ignition audible warning as requested by the BCM. The BCM 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 and the signal circuit is low. 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 and the signal circuit is high.