Circuit/System Description

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.

The lane keep assist system is enabled and disabled through the lane departure switch. When enabled, the lane keep assist indicator will illuminate.

The switch and indicator are connected to the Frontview Camera Module. The Frontview Camera module supplies a reference voltage to the lane keep assist switch. When the switch is pressed, the signal circuit is grounded. When enabled, the Frontview Camera Module will illuminate the indicator located in the switch when lane keep assist system is enabled.

When the system is operating and can detect the lane markings, the Frontview Camera Module will request via serial data communications that the instrument cluster illuminate the green lane keep assist symbol. If the Frontview Camera Module detects that the vehicle unintentionally crosses a lane marking without the turn signal being used, the module will request the instrument cluster to flash the amber lane keep assist indicator. An audible warning will also sound three times when the amber lane keep assist indicator in the instrument cluster is flashing.