Audi A6 Typ 4G: Axle Alignment Information
Wheel alignment must only performed using VW/Audi-approved
wheel alignment equipment.
Each time wheels are aligned, both front and rear wheels
must be aligned.
Otherwise, proper vehicle drivability cannot be ensured.
Note
- Axle alignment should not be performed until the vehicle has
been driven 1,000-2,000 km, since it takes this long for the
suspension to settle.
- The individual specifications should be followed as exactly
as possible when making adjustments.
Before performing an axle alignment on a vehicle with air
suspension, check the curb weight or control position and adapt
it again if necessary. Refer to
→ Chapter "Axle Alignment Control Position on Vehicles with Air
Suspension, Checking".
WARNING
If the vehicle has ESP or ABS, calibrate the
Steering Angle Sensor -G85- after making any adjustments
on the suspension using the Vehicle Diagnostic Tester.
Caution
The suspension components could be damaged.
If the subframe mount, the steering gear or the
subframe crossbrace are not installed correctly, do not
rest the vehicle on its wheels.
The vehicle must not be supported on the subframe or
the subframe crossbrace (for example using a floor
jack).
WARNING
All bolts and nuts must be tightened properly before
driving the vehicle!
WARNING
There is a risk of injury if the engine starts
automatically in vehicles with the Start/Stop System.
- For vehicles with an activated Start/Stop System
(recognizable from a notification in the instrument
cluster), the motor can be started automatically if
needed.
- Make sure that the start/stop system is deactivated
when working on the vehicle (turn off the ignition, turn
on the ignition when necessary).
Test Prerequisites
Follow the general information regarding vehicle alignment.
Refer to
→ Chapter "Axle Alignment Information".
- Vehicle must be cool.
- Check suspension, steering and steering linkage for
excessive play and damage, repair if necessary.
- Tread depth difference may be no more than 2 mm on an axle.
- Prescribed tire pressure
- Vehicle accurately aligned, suspension bounced and rocked
several times
- Drive the vehicle onto the alignment rack without tension.
Move the vehicle back and forth if necessary to relieve any
tension on the axle components.
- The steering wheel must be "evened out" into the center
position before beginning the measuring and adjusting. Use
Steering Wheel Scales -VAS6458- for this.
- Vehicles with coil spring suspension in curb weight
position, "curb weight position means: the vehicle weight (fuel tank full, as
well as the windshield washer fluid reservoir for the windshield/headlamp washer
system, spare wheel, vehicle tools and vehicle jack) with without the driver."
- Vehicle with air suspension in control position, "control
position means: the height position of the vehicle without the
driver". Refer to
→ Chapter "Axle Alignment Control Position on Vehicles with Air
Suspension, Checking".
- Make sure that the sliding plates and turn tables are not
touching the end stop when checking the wheel alignment.
- The measurement sensor must be properly adjusted and
attached to the vehicle; observe device manufacturer's operating
instructions.
- Perform wheel run-out compensation: Permissible axial
run-out of the wheel rims can exceed the specified toe setting
tolerance. If compensation for wheel run-out is not performed,
it will not be possible to obtain a correct toe-in adjustment.
- Vehicle alignment platforms and the alignment
equipment/alignment computers can deviate from their original
calibration over time therefore they should be calibrated at
least once a year during maintenance.
- Handle highly sensitive units with care.
- If necessary, contact the manufacturer for familiarization
with the proper use of the equipment.
Measurement Preparations
Preparation Work for Calibrating and Adjusting Driver Assist Systems
Perform the following steps using "quick access" if one or
more systems on the vehicle will be calibrated/adjusted (without
a previous axle alignment):
- Before driving the vehicle onto the alignment stand, make
sure there is enough space between the vehicle and the ACC
Adjustment Device. Distance between the setting device and the
vehicle: 120 cm +- 2.5 cm.
- If there is not sufficient space, drive vehicle backward on
alignment stand in order to be able to use the corresponding
space.
- Check the Diagnostic Trouble Code (DTC) memory and correct
any malfunctions before beginning the calibration/adjusting.
- Vehicle accurately aligned, suspension bounced and rocked
several times
- Make sure that the sliding plates and turn tables are not
touching the end stop when checking the wheel alignment.
- Refer to the Owner's Manual and activate the changing a
wheel mode.
- Connect the battery charger. Refer to
→ Electrical Equipment; Rep. Gr.27; Battery; Battery, Charging.
- Position the front wheels so they are straight.
- Connect the Vehicle Diagnostic Tester to the vehicle and
guide the diagnostic cable through the open window.
- The vehicle exterior lamps are off.
- All the vehicle doors are closed.
- Using the screen, turn on the calibration/adjustment on the
wheel alignment computer.
Measurement Preparations
Special tools and workshop equipment
required
- Brake Pedal Actuator -VAG1869/2-.
- Steering Wheel Scales -VAS6458-
- For vehicles with air suspension Vehicle Diagnostic Tester
- Wheel Alignment Computer released by VW/Audi
Requirements
- The measurement sensor must be properly adjusted and
attached to the vehicle; observe device manufacturer's operating
instructions.
- Make sure that the sliding plates and turn tables are not
touching the end stop when checking the wheel alignment.
- Drive the vehicle onto the alignment rack without tension.
Move the vehicle back and forth if necessary to relieve any
tension on the axle components.
- The steering wheel must be "evened out" into the center
position before beginning the measuring and adjusting. Use
Steering Wheel Scales -VAS6458- for this.
READ NEXT:
Axle Alignment Specified Values, Sportback Front Axle
Note
The specified values apply to all engine versions.
1) On RHD vehicles, the camber must be
determined based on the distance between
Camber cannot be adjusted.
Camber can be centered evenly within specified tolerance
range by shifting subframe.
- Remove the noise insulation -1 and 2-.
Refer to
→ Body Exterior; R
Overview - Dynamic Steering
1 - Active Steering Control Module -J792-
The basic setting must be performed on the system if the Active
Steering Control Module -J792- was replaced. Refer
SEE MORE:
Overview - Navigation System
The navigation system is a component of the Information
Electronics Control Module 1 -J794- in the instrument panel.
Operation is performed via the Multimedia System Control
Head -E380-.
The navigation data is stored on the SD card for navigation.
The navigation data i
Fig. 4 Driver information system in the instrument cluster
Fig. 5 Instrument cluster: example information line
The information in the driver information system
is shown in B tabs A fig. 4. The
following
content is possible depending on vehicle equipment:
The second and third tabs are only visib