Headlamps On Warning Chime

WARNING: This page is about a different car, the 2019 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

The headlamps on warning chime warns the headlamps are on when exiting the vehicle. When the driver exits the vehicle with the driver door ajar, the headlamp switch is in the PARK or HEADLAMP position and the ignition is OFF, the BCM sends the headlamp switch status message to the IPC through the GWM to sound the headlamps on chime. The headlamps on chime sounds a 1-second chime tone continuously.

The IPC receives the headlamp switch status message from the GWM over the High Speed Controller Area Network 3 (HS3-CAN).

The GWM receives the headlamp switch status from the BCM over the High Speed Controller Area Network 1 (HS1-CAN).

When a chime request is received, the IPC sends the IPC chime request message to the ACM and the audio DSP to sound the chime.