System Operation

Autolamps

System Operation

System Diagram





Autolamps

The BCM (Body Control Module) monitors the light sensor with a voltage signal. The light sensor input to the BCM (Body Control Module) varies with the ambient light conditions.

The headlamp switch sends a status message over the LIN (Local Interconnect Network) circuit to the BCM (Body Control Module) to indicate the headlamp switch status (position or a fault within the headlamp switch).

When the BCM (Body Control Module) receives a headlamp switch status message from the headlamp switch indicating a request for the autolamps, the BCM (Body Control Module) monitors the light sensor for the ambient light condition. If the BCM (Body Control Module) determines the ambient light level is dark, the BCM (Body Control Module) supplies voltage to the exterior lamps.

Headlamps On With Wipers On Function

When the headlamp switch is in the autolamps on position, the exterior lamps turn on when the front wipers are on. This feature does not activate the exterior lamps during a mist wipe, while the wipers are on to clear washer fluid during a wash condition, the wipers are in automatic or intermittent modes.

The exterior lamps turn off when the ignition switches off or to accessory mode, the headlamp switch is placed in the off position, or the front wipers are turned off. The exception to this is when the exterior lights are on because of darkness determined by the autolamp system.