Audi Q7: Wheels and Tires
This information can be found in the Wheels and Tires repair manual. Refer to
→ Suspension, Wheels, Steering; Rep. Gr.44; Wheels and Tires.
Tire Pressure Monitoring System
Tire Pressure Monitoring Control Module -J502-, Removing and Installing
Removing
- Component location: on the rear subframe.
- Disconnect the connector -2-.
- Release the catch in direction of
-arrow- and remove the Tire Pressure Monitoring Control
Module -J502--1- toward the rear.
Installing
Install in reverse order of removal.
Vehicle Alignment
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 drive ability 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.
WARNING
Risk of accident!
If vehicle will be driving on the streets, all bolts
and nuts must be tightened properly!
Test Requirements
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
- 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.
- Versions with rear axle steering: switch off the ignition
when the vehicle has come to a stop. This is the only way to
ensure that the rear axle steering is in the straight-ahead
position.
- Versions with rear axle steering: check the steering gear
rear axle orientation. Refer to
→ Chapter.
- Vehicle accurately aligned, suspension bounced and rocked
several times
- 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 springs 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."
Refer to
→ Chapter "Vehicles with Coil Springs, Checking the Curb Weight
Position for Axle Alignment".
- Vehicles with air suspension at
standard vehicle height: "standard vehicle height means: the
vehicle level without the driver". Refer to
→ Chapter "Standard Vehicle Height for Axle Alignment 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.
Measure 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.
- Switch off the ignition when the vehicle has come to a stop.
Only this way it can be ensured that the is in the
straight-ahead position.
- Check the 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.
- Connect the battery charger for the battery support mode.
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.
Measure Preparations
Special tools and workshop equipment
required
- Vehicle Diagnostic Tester
- Brake Pedal Actuator -VAG1869/2-.
- Steering Wheel Scales -VAS6458-
- Wheel Alignment Computer released by VW/Audi
Test Conditions
- 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.
- 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.
Need for Axle Alignment, Evaluating
When Vehicle Alignment is Necessary
- Vehicle shows handling problems.
- Involved in an accident.
- If axle components were removed and installed or replaced.
- Tire wear patterns are uneven.
After REMOVING and REINSTALLING components.
1) Even if the subframe was secured with the locating pins,
an axle alignment may be necessary. Perform a road test.
2) Even if the subframe was secured with the locating pins,
an axle alignment may be necessary. Perform a road test.
After REPLACING components
1) Even if the subframe was secured with the locating pins,
an axle alignment may be necessary. Perform a road test.
READ NEXT:
Note
Determine the correct suspension version. Refer to
→ Chapter "Production Control Number (PR Number) Explanations".
A vehicle with coil springs can only be measured at curb
weigh
Conditions
The settings specified apply to the curb weight position
or the standard vehicle height of the
vehicle. To determine the curb weight position or
the standard vehicle height the dimensi
Adaptive Cruise Control (ACC), Adjusting
Special tools and workshop equipment
required
Vehicle Diagnostic Tester
Wheel Alignment Computer
Screwdriver with T-bar VAS272001 -VAS272001-, not shown
SEE MORE:
Overview - Subframe Mount
1 - Bolt
55 Nm
2 - Tunnel Crossmember
Removing and installing. Refer to
→ Chapter "Tunnel Crossmember, Removing and Installing".
3 - Stop
For the transmission mount
4 - Transmission Mount
Removing and installing. R
The following test and adjustment description applies to all
countries.
However, national guidelines or regulations of the country
must be observed.
HID Headlamp, Adjusting
Special tools and workshop equipment
required
Headlamp Adjusting Unit -VAS5209B-
Headlamp Adjusting Unit -VAS621001-