Daytime Running Lamp: Description and Operation

DAYTIME RUNNING LAMPS
Vehicles manufactured for sale in Canada illuminate the high beam bulbs of both headlamps at a reduced intensity when the engine is running, the parking brake is released, the automatic transmission gear selector is not in the Park position and the exterior lamps are turned off. The FCM must be programmed appropriately for this feature to be enabled. Once enabled, anytime the FCM receives electronic messages over the CAN data bus from the PCM indicating the engine is running, from the SCM indicating the status of the left (lighting) multi-function switch input is in the Off or Auto positions and from the EMIC indicating that the parking brake lever is released, the FCM Locationsprovides a pulse width modulated voltage output to the headlamp high beam bulbs through the right and left high beam feed circuits to produce illumination at a reduced intensity.