Lane Departure Warning Description and Operation: Notes
The lane departure warning system is a convenience feature that utilizes the B174W Frontview Camera - Windshield to determine if the vehicle has unintentionally crossed a lane marking and issue a warning. The B174W Frontview Camera - Windshield is located behind the windshield, looking out at the road ahead and detecting any lane markings. When the vehicle unintentionally leaves a detected lane, visual and audible alerts are given to the driver. The visual alert cannot be changed, but the driver can select audible alerts in the vehicle personalization menus. Refer to the vehicle owner's manual for vehicle personalization options.
The lane departure warning system utilizes the following components:
- B174W Frontview Camera - Windshield
- P16 Instrument Cluster
- Lane Departure Warning Switch
- Infotainment system
B174W Frontview Camera - Windshield
The B174W Frontview Camera - Windshield detects visual queues such as lane markings. When it is determined that the vehicle has unintentionally moved outside of the lane, visual and audible or haptic (if equipped) warning is given to the driver. The B174W Frontview Camera - Windshield receives an input from the lane departure warning switch and controls the lane departure warning switch indicator output. The B174W Frontview Camera - Windshield also communicates via serial data with the P16 Instrument Cluster and infotainment system to request visual and audible alerts.
P16 Instrument Cluster
The P16 Instrument Cluster contains green and amber lane departure warning indicators. These indicators inform the driver of the current status of the lane departure warning system and are controlled via serial data by the B174W Frontview Camera - Windshield. When the vehicle speed is above 56 km/h (35 MPH) and the system has detected the required lane markings and is ready to assist, the green indicator will be illuminated. If the vehicle has unintentionally left the lane, the amber indicator will flash.
Lane Departure Warning Switch
The lane departure warning switch provides an input to the B174W Frontview Camera - Windshield to turn the lane departure warning system on and off. The B174W Frontview Camera - Windshield applies voltage and monitors the lane departure warning switch signal circuit. The lane departure warning switch is a normally open switch. With the switch open, voltage seen at the B174W Frontview Camera - Windshield is high. When the lane departure warning switch is pressed, the switch is closed and the signal circuit is pulled to ground. With the switch closed, voltage seen at the B174W Frontview Camera - Windshield is low. The B174W Frontview Camera - Windshield will respond to this by activating or deactivating the lane departure warning system.
The lane departure warning switch also utilizes the lane departure warning indicator, which is part of the lane departure warning switch and is controlled by the B174W Frontview Camera - Windshield to indicate the operational status of the lane departure warning system. When the lane departure warning is enabled, the B174W Frontview Camera - Windshield will illuminate the indicator on the switch. The indicator receives voltage through a high control circuit from the K9 Body Control Module and is controlled through a low control circuit by the B174W Frontview Camera - Windshield.
Infotainment System
The infotainment system controls the audible alert for the lane departure warning. If the vehicle has unintentionally left the lane, the B174W Frontview Camera - Windshield will request via serial data an audible alert to the driver through the infotainment system