Lighting Mechanisms (17.04)
Lighting (17.00)
May 2007 Workshop Manual 17-4-1
Lighting (17.00)
Lighting Mechanisms (17.04)
Headlamp Levelling (HID Only)
The ‘Automatic Dynamic He adlamp Levelling System’
consists of:
• An Automatic Dynamic Headla mp Levelling System ECU
• A level sensor for the front suspension
• A level sensor for the rear suspension
• A bi-polar stepper motor mounted in the housing of each headlamp
The Automatic Dynamic Headlamp Levelling System
prevents the dipped beam dazzling oncoming road traffic by
varying the angular position of the dipped (and main beam)
headlamp units relative to the position of the vehicles
suspension.
Static condition - Compensates for boot or occupant load
condition.
Dynamic condition - Compensates for suspension
movements due to acceleration and deceleration. The
sensitivity of the system is dependent on vehicle speed and
the rate of change of the vehicle speed.
High amplitude low frequency inputs such as those caused
by potholes are filtered out to desensitise the system in
constant speed situations.
17-04-001