My "service lane departure system" warning is on. Had it a couple places and they are not sure what is wrong. Has anyone had this and can tell me what could be wrong?
The lane departure warning system is controlled by the vehicle direction alert alarm warning (VDAAW) module. The module may have set a diagnostic trouble code (DTC) causing the warning light to illuminate. A scan tool can retrieve the DTC. The DTC is an alphanumeric code that can be used to diagnose the issue.
You and/or your Lucerne's technician can access the diagnostic information in ChiltonDIY or ChiltonPRO. Here's a sample from Chilton:
Certain factors will affect the operation of the lane departure warning system. When the system is operating properly, the green lane departure indicator will illuminate on the IPC. This indicates that all of the required operating conditions to permit lane departure warning have been met. The green lane departure indicator will not appear when the system is having difficulty seeing the lines on the road or if the view of the camera on the windshield is blocked with mud, dirt, snow, ice, or slush, if the windshield is damaged, or when weather limits visibility, such as while driving in fog, rain, or snow conditions. This is normal operation, the vehicle does not need service. Additionally, lane departure warnings may occasionally occur in a properly operating vehicle due to tar marks, shadows, cracks in the road, or other road imperfections. This is normal system operation and the vehicle does not require service. The driver information center (DIC) may also display LANE DEPARTURE SYSTEM UNAVAILABLE due to loss of GMLAN communication or invalid steering wheel position sensor data. Improper headlamp aiming may reduce the efficiency of the lane departure warning system at the night.
Gene Hannon Jr, CMAT