Audi Workshop Service and Repair Manuals

Vehicles with gas-discharge lamps feature automatic headlight range control as standard.

=> Electrical System; Repair Group 94

The automatic headlight range control function requires information on bump or rebound travel at front and rear axle.

For this purpose, position of rear axle (front-wheel drive) or left link (four-wheel drive) with respect to body is transmitted by way of a connecting link to rear left/rear right vehicle level sender -G76/ -G77. Sender then transmits electrical signals to headlight range control unit -J431.

Headlight range control unit -J431

=> Electrical System; Repair Group 94; Exploded View of Automatic Headlight Range Control; Removing and installing headlight range control unit -J431

The automatic headlight range control reacts to changes in vehicle level. Further details on operation can be found in Self Study Programme No. 192.

The following situations may produce a change in vehicle level:

• ◆ Use of trailer
• ◆ Different loads (vehicle unladen, partly laden or fully laden)
• ◆ Driving style (fast/slow)

Headlight basic setting is always to be checked:

• ◆ Following vehicle level sender installation work
• ◆ Following replacement of vehicle level sender
• ◆ Following removal/installation or replacement of rear axle on vehicles with front-wheel drive
• ◆ Following removal/installation or replacement of left link on vehicles with four-wheel drive

Headlight basic setting

=> Electrical System; Repair Group 01; Self-diagnosis of automatic headlight range control; Basic setting

• Rear subframe
• Suspension strut
• Lower link
• Connecting link of rear left/rear right vehicle level sender -G76/ -G77-
• Self-locking nut, 10 Nm
• Hexagon nut, 4 Nm

• Rear left/rear right vehicle level sender -G76/ -G77-
• ◆ Removing and installing => Page 42-49 and

=> Electrical System; Repair Group 94; Exploded View of Automatic Headlight Range Control; Removing and installing rear left vehicle level sender -G76

• ◆ Checked by self-diagnosis

=> Electrical System; Repair Group 01; Self-diagnosis of automatic headlight range control

• ◆ Perform headlight basic setting following replacement

=> Electrical System; Repair Group 01; Self-diagnosis of automatic headlight range control; Basic setting

• Bracket

Replacing vehicle level sender in vehicle

Removing

Special tools and workshop equipment required

• ◆ V.A.G 1331 Torque wrench
• ◆ V.A.G 1332 Torque wrench

Notes:

• ◆ Removal and installation of rear axle or lower link involves unfastening connecting link of rear left/rear right vehicle level sender -G76/ -G77 at lower link.

• ◆ → For attaching connecting link to crank of rear left/rear right vehicle level sender -G76/ -G77, use 10 mm open-ended wrench with dimension -A- = 4 mm so as not to damage seal.

• ‒ Dimension -A- = 4 mm

•     1 -    Tightening torque: 4 Nm

• ‒ Remove wheel.

• ‒ → Unscrew nuts -arrows-.
• ‒ Remove vehicle level sender -1-.

Installing

Install in reverse order.

Tightening torque of nuts -arrows- => Page 42-45

On installing headlight range control, ensure correct mutual positioning of crank and connecting link.

Note:

• ◆ Connecting link must be vertical
• ◆ Crank must face outwards at bottom

• ‒ Perform headlight basic setting following replacement.

=> Electrical System; Repair Group 01; Self-diagnosis of automatic headlight range control; Basic setting