DTC B0502: RH DRL Relay Circuit (Open Or Short To Ground): Notes

BCM grounds circuit No. 1915 (Orange wire) to energize RH DRL relay and turn right front turn signal on. This allows right 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. 1915 (Orange wire). When BCM activates RH DRL relay, voltage level in control circuit should be low. When relay is not activated, voltage level in control circuit should be high.

DTC B0502 will set when BCM detects a low voltage level in circuit No. 1915 (Orange wire) for 2 seconds when it is not energizing RH DRL relay. No driver warning message will be displayed.

DTC B0502 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 B0502 will also clear when conditions no longer exist, or when IPC or scan tool is used to clear codes.

NOTE: If DTC B0502 is a history code, problem may be intermittent. Wiggle wires while performing the following test.