Circuit/System Description

WARNING: This page is about a different car, the 2009 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.

The lane departure warning system is controlled by the vehicle direction alert alarm warning (VDAAW) module mounted on the windshield. Lane departure warning is enabled and disabled through a switch located in the headlamp switch assembly. When enabled, the VDAAW module will illuminate the indicator located in the switch.

When the system is operating and can detect the lane markings, the VDAAW module will request via serial data communications that the instrument panel cluster (IPC) illuminate the green lane departure ready-to-assist indicator. If the VDAAW module detects that the vehicle has crosses a lane marking without the turn signal being used, the module will request that the IPC flash the yellow lane departure warning indicator. An audible warning will also sound three times when the yellow IPC indicator is flashing.