Circuit/System Description

The frontview camera module monitors the lane departure warning switch signal circuit. The frontview camera module applies voltage and monitors the switch signal circuit. The lane departure warning switch is normally open switch. With the switches open, voltage seen at the frontview camera module is high. When a switch is pressed, the signal circuit is pulled to ground and the voltage seen by the frontview camera module is low. The frontview camera module will respond to this by activating or deactivating the lane departure warning feature.

When the lane departure warning is enabled, the frontview camera module will illuminate the indicator on the switch. The indicator receives voltage through a high control circuit from the body control module (BCM) and is controlled through a low control circuit by the frontview camera module.