Conditions for Setting the DTC

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

When the BCM receives a high beam headlamp OFF command and the high beam headlamp relay control circuit is shorted to ground.
When the BCM receives a high beam headlamp ON command and the high beam headlamp relay control circuit is shorted to voltage or open.
When the high beam relay coil side is open or the battery positive voltage to the high beam relay is open.