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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 (Driver Assistance Systems) >> Diagnostic Information and Procedures >> Lane Departure Warning System Malfunction >> Circuit/System Description

Circuit/System Description

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

The switch and indicator are connected to the B174W Frontview Camera - Windshield. The B174W Frontview Camera - Windshield supplies a reference voltage to the lane departure warning switch. When the switch is pressed, the signal circuit is grounded. When enabled, the B174W Frontview Camera - Windshield will illuminate the indicator located in the switch

When the system is operating and can detect the lane markings, the B174W Frontview Camera - Windshield will request via serial data communications that the P16 Instrument Cluster illuminate the green lane departure warning symbol. If the B174W Frontview Camera - Windshield 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 departure warning indicator. An audible warning will also sound three times when the amber lane departure warning indicator in the P16 Instrument Cluster is flashing.

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