Passat L4-1.8L Turbo (AWM) (2004)
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Ride Height Sensor: Description and Operation
Level control system sensor in vehicles with automatic headlight range control - general information
Vehicles with gas discharge headlights with automatic headlight range control comes standard.
For its operation, the automatic headlight range control requires information about spring compression and rebound at the front and rear axles.
For this, the position of the left lower control arm in relation to the body is transferred over a connecting link to the left front level control system
sensor G78. This transmits electrical signals to the headlight range control module.
These signals are transmitted to the control module from the left rear level control system sensor G76 at the rear axle.
These signals are required for determining vehicle level.
The automatic headlight range control reacts independently to changes in vehicle level.
The vehicle level can change in the following situations:
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Towing a trailer
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Different load conditions; vehicle empty, vehicle partially or fully loaded
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Slow or fast driving habit
CAUTION: Adjustment of headlights!
Checking the headlight basic setting is always required when:
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The retaining clamp for the connecting link on the lower link was loosened
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The lower control arm was removed and installed or replaced
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The rear axle was removed and installed or replaced (vehicles with front wheel drive)
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The rear lower control arm was removed and installed or replaced (vehicles with all wheel drive)
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Assembly work was performed on level control system sensor
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The level control system sensor was replaced
