Automatic Range Adjustment (Bi-Xenon)
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2014 Volvo XC90, 2013 Volvo XC90, 2012 Volvo XC90, 2011 Volvo XC90, and 2010 Volvo XC90. However, it is still accessible from the selected car via links, so may be relevant.
There are two motors on the reverse of the headlamps. These angle the headlamps upwards or downwards to control the range of the beam.
The motors are controlled by signals from a position sensor at the rear axle. The sensor detects the angle of the car under different load conditions and sends this information so that the central electronic module (CEM) can determine whether the lamps need to be raised or lowered.
There are diagnostics for the headlamp range adjustment.