Test Requirements

Test requirements:
^ Check suspension, wheel bearing, steering and steering linkage for excessive play and damage
^ Tread depth difference of no more than 2 mm on an axle
^ Tires inflated to correct pressure
^ Curb weight of vehicle

Fuel tank must be full
Spare tire and vehicle tools are installed in appropriate position in vehicle.
The water container for the windshield/headlight cleaning system must be full.
^ In vehicles with level control (1BG), switch on ignition before measurement, and wait until vehicle height control process is complete.
^ For vehicles with 4-wheel air suspension (1BY), vehicle must be at normal level.
^ Deactivate level control system. Be sure there is sufficient pressure in pressure reservoir. Press up and down buttons in operating unit for level control system simultaneously for more than 5 seconds until LED indicators light up. Indicator in instrument cluster will also light up. Automatic height regulation switches off automatically at 5 km/h.
^ Be sure that the sliding plates and turn tables are not touching the end stop when checking wheel alignment.

Note the following!
^ Test equipment must be properly adjusted and attached to the vehicle (see equipment manufacturer's instructions).
If necessary, contact the manufacturer for familiarization with the proper use of the equipment.
After a certain period, wheel alignment platforms and computer equipment can lose their original leveling setting and adjustments.

Wheel alignment platforms and wheel alignment analyzer/computer should be serviced and calibrated at least once a year.
Precision equipment of this type should be treated with due care and knowledge.

Explanation of weight codes (Part numbers)
Various suspensions are offered as options. These are identified by Part numbers.
Running gear version fitted in vehicle is indicated by the factory weight code on the vehicle data plate (arrow).

Example of a vehicle data plate
Vehicle data plate is located at rear in spare tire well and in service book.
The following table shows the meaning of the Part numbers that are critical for wheel alignment.

Part No. for suspension versions is shown in figure (see arrow).
In this example the vehicle has standard suspension 1 BA (arrow) installed.
1BA = standard suspension
1BE = sport suspension
1BP = rough terrain suspension 1 (curb weight position like 1 BA, but with spring limitation)
1BT = rough terrain suspension 1+ and slight reinforcement (about 7 mm raised position)
1BB = rough terrain suspension 2 (about 20 mm raised position)
1BG = suspension with level control system
1BC = special-purpose vehicles (fire department, medical emergency, police, etc.)
1BH = suspension for USA
1BD = Audi SO sport suspension
1BJ = suspension for light armor
1BY = Suspension for Allroad (4 - wheel air suspension)

Special tools and equipment

^ VAG1907
^ VAG1941 (not installed)
^ VAG1925
^ VAG1925/3
^ VAG1925/4

Whether adapter VAG1925/3 or VAG1925/4 is used depends on the design of the car lift.

^ VAG1925/6

^ VAG1813

Measurement procedure
^ Be sure that the sliding plates and turn tables are not touching the end stop when checking wheel alignment
^ Vehicle accurately aligned, suspension bounced and rocked several times
^ Pick-up must be properly adjusted and attached to the vehicle (see equipment manufacturer's instructions)
^ Perform wheel run-out compensation.
^ Permissible lateral runout of the wheel rims can already exceed the specified toe-in setting tolerance. If compensation for wheel runout is not performed, it will not be possible to obtain a correct toe-in adjustment.
^ On the Audi Allroad, it may be necessary to move the turn tables after raising the vehicle, to reach free-play for the pick-up sensors.

^ Insert brake pedal depressor.

CAUTION: The vehicle must not be lifted at moving axle parts.

Alignment, allocation of adapter to suspension

1) Only required for certain lifts (V.A.G. 1925/3 replaces V.A.G. 1925(4)