B2650

DTC B2650

CIRCUIT DESCRIPTION
The body control module (BCM) monitors the headlamp high beam signal circuit for high beam activity. When the high beam headlamps are commanded on by the DRL relay or the headlamp dimmer switch the headlamp high beam signal circuit is pulled to ground. Battery positive voltage is applied to the DRL relay and the LH high beam headlamp from the DRL/EXT fuse and the RH high beam headlamp receives battery positive voltage from the EXT fuse.

CONDITIONS FOR RUNNING THE DTC
The headlamps are not on and the DRL is not enabled.

CONDITIONS FOR SETTING THE DTC
- The BCM detects a short to ground or open in the headlamp high beam signal circuit. When the headlamps are off and the DRL are off.
- The condition above must be present for more than 0.3 seconds.

ACTION TAKEN WHEN THE DTC SETS
The BCM stores DTC B2650 in memory.

CONDITIONS FOR CLEARING THE DTC
- A current DTC B2650 will clear when the BCM no longer detects a short to ground or an open in the headlamp high beam signal circuit.
- A history DTC B2650 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.

DIAGNOSTIC AIDS
- If the DTC B2650 is a history DTC, the fault may be intermittent.
- The following conditions may cause an intermittent malfunction to occur:
- An intermittent short to ground in the headlamp high beam signal circuit.
- An intermittent open in the headlamp high beam signal circuit.

TEST

Steps 1-5:

Steps 6-10:

Steps 11-17: