Function Test - Section 11
Function Test
Step 1.0:
Function description
Headlamp range adjustment with Xenon headlamps:
Headlamp range adjustment operates dynamically. The front and rear axle sensors (A51 and A52) report any charges in the vehicle ride height directly to the headlamp range adjustment control module (N71). In turn, the headlamp range adjustment control module compares both the vehicle ride height and the headlamp adjustment values and as necessary the headlamps are adjusted via the headlamp range adjustment motors (E1m1 and E2m1). This adjustment only takes place, if over a period of time, the front and rear axle sensors (A51 and A52) relay a change in the vehicle ride height.
Headlamp range adjustment control module (N71)
The headlamp range adjustment control module processes the received signals from the front and rear axle sensors and the position of the headlamp range adjustment motors. After evaluation of the signals. a necessary command is sent to the headlamp range adjustment motors.
Front and rear axle senors (A51 and A52)
A sensor is mounted on the stabilizer bar of both the front and rear axles.
These sensors relay a vehicle ride height signal to the headlamp range adjustment control module (N71).
Headlamp range adjustment motors (E1m1 and E2m1)
Via a potentiometer in the headlamp range adjustment motor, the position of the headlamp reflectors is relayed to the headlamp range adjustment control module (N71). For a correction. the headlamp range adjustment motors receive a command from the headlamp range adjustment control module (N71).
Diagnostics:
Diagnostics are performed using both the HTT and the Diagnostic Manual.
