DTC B0507: LH DRL Relay Circuit (Open Or Short To Ground): Notes

BCM grounds circuit No. 1914 (Light Blue/White wire) to energize LH DRL relay and turn left front turn signal on. This allows left front turn signal to be used in Daytime Running Lights (DRL), Underhood Theft Deterrent (UTD) and approach lighting functions.

BCM monitors voltage level on circuit No. 1914 (Light Blue/White wire). When BCM activates LH DRL relay, voltage level in control circuit should be low. When relay is not activated, voltage level in control circuit should be high.

DTC B0507 will set when BCM detects a low voltage level in circuit No. 1914 (Light Blue/White wire) for 2 seconds when it is not energizing LH DRL relay. No driver warning message will be displayed.

DTC B0507 requires an ignition cycle to change from current to history. If conditions for malfunction no longer exist, history DTC will clear after 50 consecutive ignition cycles. DTC B0507 will also clear when conditions no longer exist, or when IPC or scan tool is used to clear codes.

NOTE: If DTC B0507 is a history code, problem may be intermittent. Wiggle wires while performing the following test.