Audi Q7: Pneumatic System, Checking
Preparations, Checking Lumbar Support Air Cushion and Seat Bolster
Adjuster for Leaks
Note
- When an appropriate entry is made in the event memory, there
is a prompt in "Guided Fault Finding" to replace the faulty
lumbar support air cushion using the -VAS6618/10- using the
Vehicle Diagnostic Tester.
- Then the preparations for this leak test are described that
must be carried out directly in the seat.
- Connection diagram with assignment of the pneumatic lines to
the air cushions. Refer to
→ Chapter "Connection Diagram - Pneumatic System".
Special tools and workshop equipment
required
- Vehicle Diagnostic Tester
- Pneumatic Repair Set -VAS6618A-
Procedure
- The backrest cover must be removed. Refer to
→ Chapter "Backrest Cover, Removing and Installing".
- Before disconnecting, mark the allocation of the pneumatic
lines to each other using a waterproof felt-tip pen.
- Disconnect the pneumatic lines for the faulty lumbar support
air cushion each at a distance of 180 mm, measured from the
solenoid valve block.
Note
- Wiring connectors applied as an addition may not be opened
another time.
- If a pneumatic line at a seat must be disconnected, and a
wiring connector was already placed on it at an earlier time,
then the new wiring connector must be set 230 mm (9 in.) away
from the existing separating point.
![A72-11906](images/books/3007/audi_q7_pneumatic_system_checking_1429.webp)
![Preparations, Checking Lumbar Support Air Cushion and Seat Bolster Adjuster for Leaks](images/books/3007/audi_q7_pneumatic_system_checking_1430.webp)
- To connect, attach the connecting sleeves from the -VAS6618-
to the pneumatic lines.
Note
- To connect, insert the pneumatic lines in the -VAS6618/2-
from both sides in direction of -arrows A-.
- To release, push the release rings in direction of
-arrows B- and simultaneously
remove pneumatic lines in direction of -C
arrows-.
![A72-11372](images/books/3007/audi_q7_pneumatic_system_checking_1432.webp)
- Connect the -VAS6618/10- on the lines to the lumbar support
air cushion.
Note
The illustration shows the pneumatic line to the lumbar
support upper air cushion.
- Connect the pneumatic lines following the leak test. Refer
to
→ Chapter "Pneumatic Lines, Disconnecting and Connecting".
![A72-11907](images/books/3007/audi_q7_pneumatic_system_checking_1434.webp)
Preparations for Compressor and Pressure Line Leak Check
Special tools and workshop equipment
required
- Turbocharger Tester Kit -VAG1397A-
- Hose Cutting Pliers -VAS6228-
- Pneumatic Repair Set -VAS6618A-
- Vehicle Diagnostic Tester
Note
- When an appropriate entry is made in the event memory, there
is a prompt in "Guided Fault Finding" to perform a leak check
using the Vehicle Diagnostic Tester.
- Then the preparations for this leak test are described that
must be carried out directly in the front seat.
- Connection diagram with assignment of the pneumatic lines to
the air cushions. Refer to
→ Chapter "Connection Diagram - Pneumatic System".
Procedure
- The backrest cover must be removed. Refer to
→ Chapter "Backrest Cover, Removing and Installing".
Note
- To check, the pneumatic line from the compressor is not
disconnected at the connection, but is disconnected by the
described procedure. Refer to
→ Chapter "Pneumatic Lines, Disconnecting and Connecting".
- To connect during the leak test, insert the pneumatic lines
into the -VAS6618/2- from both sides in direction of
-arrows A-.
- To release, push the release rings in direction of
-arrows B- and simultaneously
remove pneumatic lines in direction of -C
arrows-.
![A72-11372](images/books/3007/audi_q7_pneumatic_system_checking_1437.webp)
In one of the test steps in the "Guided Fault Finding", it
instructs to connect the -VAG1397A- at the pneumatic line to the
Valve Block 2 in Driver Seat -N476-/ Valve Block 2 in Front
Passenger Seat -N478-.
- Disconnect the pneumatic line -1-
from the valve block.
a - 120 mm (4.7 in.)
![A72-12037](images/books/3007/audi_q7_pneumatic_system_checking_1438.webp)
- Using hoses and adapter pieces from the -VAS6618A-, connect
the -VAG1397A- to the pneumatic line -2-
coming from the compressor.
1 - Valve Block 2 in Driver Seat -N476-/ Valve Block 2 in Front
Passenger Seat -N478-
Note
To connect the pneumatic lines, make an adapter hose from
the -VAS6618A-.
- Connect the pneumatic lines following the leak test. Refer
to
→ Chapter "Pneumatic Lines, Disconnecting and Connecting".
![A72-11905](images/books/3007/audi_q7_pneumatic_system_checking_1440.webp)
Pneumatic Lines, Disconnecting and Connecting
Special tools and workshop equipment
required
- Hose Cutting Pliers -VAS6228-
- Pneumatic Repair Set - Pliers -VAS6618/1- (quantity: 2)
Cutting Pneumatic Lines
- Position the -VAS6228- at a right angle and cut the
pneumatic line -1-.
![A72-11207](images/books/3007/audi_q7_pneumatic_system_checking_1441.webp)
Connecting the Pneumatic Line
- Slide the pneumatic lines -1 and 3-
onto the line connector -2- on both
sides using the -VAS6618/1-. Refer to the Parts Catalog.
- Pull to make sure the pneumatic lines are connected
correctly.
![A72-11248](images/books/3007/audi_q7_pneumatic_system_checking_1442.webp)
Pneumatic Lines, Servicing
- A repair kit with pneumatic lines and line connectors is
available for the repair of pneumatic lines. Refer to the Parts
Catalog.
- Pneumatic lines must not be disconnected directly at the
components, only disconnection and connection according to the
methods described below is permissible.
- Original replacement parts are delivered with short sections
of line to which pneumatic lines with line connectors are
connected.
- Protect pneumatic lines and line connectors from debris.
- Heating the pneumatic lines to connect them to the line
connectors is NOT permissible.
- The use of lubricant to connect the pneumatic lines to the
line connectors is NOT permissible.
- The repaired pneumatic line is to be exactly as long as the
previous line - tolerance +- 10 mm.
- Dirt on the connecting points can cause leaks. Therefore,
during tests, make sure the pneumatics and the measuring
instruments remain clean.
READ NEXT:
Removing
WARNING
Follow all safety precautions when working on
pyrotechnic components. Refer to
→ Chapter "Safety Precautions for Pyrotechnic
Components".
Before handling pyrotec
1 - Front Trim Panel
For stand support on side sill side
Removing and installing. Refer to
→ Chapter "Stand Support Front Trim Panel on Side Sill Side, Removing
and Installing,
1 - Trim Panel Outer Piece
For hinge on tunnel side
Removing and installing. Refer to
→ Chapter "Hinge Tunnel-Side Trim Panel, Removing and Installing, Seat
High, Outer Second
SEE MORE:
Digital Soand System Control Module -J525-, Removing and Installing,
BOSE
The Digital Soand System Control Module -J525- is located in
the luggage compartment on the left rear.
Special tools and workshop equipment
required
Fiber-Optic Repair Set - Connector Protective Caps
-VAS6223/9-.
Overview - Roof Railing
1 - Seal
Replace if damaged
2 - Bolt
8 Nm
Quantity: 2
3 - Roof Railing
Removing and Installing. Refer to
→ Chapter "Roof Railing, Removing and Installing".
4 - Housing Upper Section
5 - Roof Rack Recognitio