Jetta V6-2.8L (BDF) (2002)
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Headlamp Alignment Sensor: Service and Repair
Vehicle "level" sensor in vehicles with automatic headlight range control
Vehicles with gas discharge lights have an automatic headlight range control.
The automatic headlight range control requires information on front and rear axle suspension spring compression and extension to function.
Therefore the altitude (inclination) of the left lower link in relationship to the body is passed to the vehicle left front level control system sensor -G78-
via a connecting link. The sensor passes the signals onto the headlight range control, control module.
On the rear axle the signals are passed to the control module by the vehicle left rear level control system sensor -G76-.
These signals are required to determine the inclination of the vehicle.
The automatic headlight range control reacts automatically to changes in the vehicle inclination.
The vehicle inclination can change with the following situations;
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Towing a trailer
^
Various load conditions: Vehicle empty, vehicle partially or fully loaded
^
Driving slowly or very fast
WARNING:
Headlight adjustment!
Checking the headlight basic setting must always be carried out when:
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The link/arm is removed and installed or replaced.
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Work is performed on vehicle "level" sensor
^
Vehicle "level" sensor is replaced
^
Coupling rod retaining clip on link/arm has been loosened.
