Daytime Running Lamp: Description and Operation

DESCRIPTION

Vehicles built for use in Canada are equipped with a Daytime Running Lamp (DRL) system. All the exterior lighting messages come from Steering Column Control Module (SCCM) or left multi-function switch on Local Interconnect Network (LIN) data bus and goes to the Cab Compartment Node (CCN), then the CCN sends out a Controller Area Network (CAN) data bus message to the Totally Integrated Power Module (TIPM) for each lighting function according to the request from left multi-function switch. Then the TIPM will turn ON/OFF the requested output. The DRL function is controlled by TIPM. Daytime running lamps are High beam lamps at lower intensity.