With the scan tool connected, view LH Air Distribution Actuator Feedback Voltage. Command the actuator from 0% to 100% using the scan tool (this is why you need a bi-directional tool).
If this code is present, you will likely experience one or more of the following: land rover b1d1787
Access the three-pin connector at the actuator. With the ignition on: With the scan tool connected, view LH Air
If you found a bare wire rubbing against metal: With the scan tool connected