DTC B2470, Daytime Running Lights Fault: Notes

Daytime Running Lights (DRL) are commanded on and off by BCM through DRL relay. DRL are activated when ignition switch is in ON position, twilight sentinel is not active, headlights and foglights are off, and transmission is not in Park. When DRL relay is energized, high beams are placed in a series circuit which provides lower illumination for DRL.

DTC B2470 will set when BCM detects an open or short circuit for 2 seconds. When DTC B2470 is set, BCM will continue to command state requested until it is achieved or changes. DTC B2470 will clear when conditions for fault no longer exist or when scan tool is used.