Audi Q5 User Manual
Service Training
Audi Q5
Self-Study Programme 433
With the introduction of the Audi Q5, Audi is extending its model range to include a compact SUV that sets new
standards in its class. In addition to the Audi Q7 and the Audi A6 allroad quattro, Audi is now introducing a third model
for the off-road segment.
The Audi Q5 will be manufactured at the Ingolstadt facility, this being a logical choice of location because the Audi Q5
is based on components used in the Audi A4 ‘08.
The new Audi Q5 combines the dynamism of a sports saloon with highly variable interior and versatile options for
leisure-time and family use. Strong and efficient engines, Quattro permanent all-wheel drive and agile running gear
have been brought together to create a superior technology package for both on and off road driving. Highlights such
as the innovative S tronic seven-speed dual-clutch gearbox and the Audi drive select driving dynamics system ar e the
evidence that substantiates the Q5's claim to Vorsprung durch Technik. The sportiest SUV in its class, it is dynamic,
multifunctional and comfortable.
433_016
The objectives of this Self-Study Programme
This Self-Study Programme describes the design and function of the new Audi Q5. After you have worked your way
through this Self-Study Programme, you will be able to answer the following questions:
– How is the bodyshell designed, and what materials are used?
– Which engines and gearboxes are installed?
– Which modifications have been made to the running gear and the brakes?
– What are the special features of the electrical system?
– How does the air conditioning system in the Audi Q5 function?
– What are the special features of the maintenance concept which have to be kept in mind?
Engine-gearbox combinations
2.0l TFSI
3.2l V6 FSI*
0B2
0B5
0B5
2.0l TDI
3.0l TDI
* Not available at market launch
0B2
0B5
0B5
433_023
Contents
Engine-gearbox combinations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
In brief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Body
Body Audi Q5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Repair concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Occupant protection
Occupant protection system in the Audi Q5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Driver airbag in the Audi Q5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Running gear
Axles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Damping control system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Steering system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Brake system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Wheels and tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Electrical system
Fuses and relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Front outside lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Rear outside lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Audi drive select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Networking - vehicles with infotainment CAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Networking - vehicles with MOST bus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Installation overview - control units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Headlight Assist System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Infotainment
Infotainment systems overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Overview - sound systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Sound systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Aerial diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Aerial system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Air conditioning
Air conditioning system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Heated cupholder Z105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Pre-heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Service
The Advanced Maintenance Concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
New workshop equipment for body repairs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Self-study programmes about the Audi Q5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
The Self-Study Programme teaches the design and function of new vehicle models,
new automotive components or new technologies.
The Self-Study Programme is not a Repair Manual.
The values given are for illustration purposes only and refer
to the software version valid at the time of publication of the SSP.
For information about maintenance and repair work, always refer to the current technical literature.
NoteReference
Introduction
Summary
Dimensions
* Max. headroom
Specifications are given in mm
Specified dimensions refer to kerb (unladen)
weight of vehicle
433_001
433_002
** 2400 kg braked on an 8 % gradient
2000 kg braked on a 12 % gradient
750 kg unbraked
Length in mm 4629 Internal width, front in mm 1465
Width in mm 1880 Internal width, rear in mm 1432
Height in mm 1653 Headroom, front in mm 1043
Track width, front in mm 1617 Headroom, rear in mm 990
Track width, rear in mm 1613 Through-loading width in mm 1050
Wheelbase in mm 2807 Load sill height in mm 693
Trailer load in kg** 750/2400/2000 Luggage capacity in l 540
Kerb weight in kg 1865 Fuel tank capacity in l 75
Max. allowable gross weight in kg 2445 Drag coefficient in c
6
w
0.33
Interior dimensions
Off-road performance
433_003
Wading depth
Ground clearance
Overhang angle
Max. climb angle
Breakover angle
433_019
7
Body
The body of the Audi Q5
The steel body of the Audi Q5 with its function and
weight optimised design is yet another example
of advanced body design by Audi. To meet the
demands on the Audi Q5, the various body
components have been made using steel materials
designed to optimally absorb the structural and
dynamic forces to which the vehicle can be
subjected both in day-to-day use and in the event
of a collision.
For this reason, only 30.8 % of the components in
the Audi Q5 are manufactured from regular deepdrawn steel. High and advanced high strength
steels account for nearly 60 % of all materials used a significant proportion.
Parts manufactured from ultra-high-strength, diequenched steels account for over 9 %, which is
likewise a relatively large proportion.
However, when manufacturing parts from this
material, the zinc coating otherwise normally
applied to Audi body panels would evaporate
during the heat shaping process, because zinc has a
boiling point of 907 °C and the process temperature
is higher than that.
For this reason, the sheet-metal panels used for
making die-quenched body parts are hot-dip coated
with aluminium, which also has the advantage of
protecting the steel surface against corrosion.
Whereas steel was also the material of choice for
the doors, the engine hood and tailgate are made
of aluminium.
8
433_078
Ultra-high-strength die-quenched 9.1 %
Ultra-high-strength 3.3 %
Advanced high strength 12.3 %
High strength 44.5 %
Regular grade steel 30.8 %
9
Body
The body of the Audi Q5
To optimise the performance of the B post in a sideimpact collision, it is important that the lower
section of the post be able to absorb more
deformation energy than the upper section - which,
ideally, should have a very rigid construction.
This was made possible, e.g. in the Audi A4 ‘08,
through the use of tailored blanks.
Rear longitudinal beam,
partially die-quenched
The B post in the Audi Q5 is partially heated and
then reshaped, as a result of which the upper
section of the post has properties an ultra high
strength die-quenched steel and the lower section
those of an ultra-high-strength steel.
This process is also applied to the rear longitudinal
beams. Here, the rearmost section is able to absorb
more deformation energy than the more rigid front
section of this component.
B post,
partially die-quenched
433_166
10
Repair concepts
The increased use of ultra-high-strength steels
necessitates the use of body repair methods
adapted specially to suit the properties of the
materials. High heat input welding will irreversibly
compromise the strength and structure of the
component due to microstructural changes in the
material.
A body structure thus welded cannot, therefore,
reliably meet the requirements.
It is important to apply a very high contact pressure
and a precision controlled electrical current during
Following extensive tests, modern spot welding
machines that meet precisely these requirements
are now available through Workshop Equipment.
MAG gas shielded arc welding may only be
performed on these high-grade steels in specific
areas, on a case-by-case basis. They are described in
the workshop literature. After miscellaneous tests
and crash simulations on repaired ultra-highstrength, die-quenched steel body parts of the
Audi Q5, Audi has approved two repair points at
which MAG welding is permissible:
spot welding work on ultra-high-strength diequenched steels.
1. B post upper section (defined cutting position, reinforcement required)
Cutting position
on B post
Weld seam
B post reinforcement
2. Partial replacement of side member/sill at inner front (defined cutting position, reinforcing required)
Cutting position
Inner side member
Reinforcements
Side member
433_159433_158
433_157
11
Occupant protection
Occupant protection system in the Audi Q5
On the following pages you will be provided with an overview of the occupant pr otection system in the
Audi Q5. For further information about the restraint systems in the Audi Q5, please refer to Self-Study
Programmes 392 Audi A5 and 409 Audi A4 ’08. The diagrams and illustrations shown in the chapter on
"Occupant protection" are intended to aid understanding.
The occupant protection system in the Audi Q5 consists of the following components and systems:
– Airbag control unit
– Driver airbag, adaptive
– Front passenger airbag, adaptive
– Front side airbags
– Head airbags
– Front airbag crash sensors (upfront sensors)
– Crash sensors for side impact detection in the doors
– Crash sensors for side impact detection on the C posts
– Front belt tensioners with adjustable belt force limiters
– Battery disconnect safety device
– Seat belt reminder for driver and front passenger
– Seat belt switch, driver and front passenger side
– Seat occupancy sensor in the front passenger seat
– Driver and front passenger seat position sensors
The vehicle can also be equipped with rear side airbags and/or a key switch for deactivating the front
passenger airbag, complete with a warning lamp.
On account of the different requirements and statutory regulations of the various markets on vehicle
manufacturers, equipment specifications - particularly for the US market - can vary.
Legend:
E24 Driver side belt switch
E25 Front passenger side belt switch
E224 Airbag disabling key switch,
front passenger side (optional)
G128 Seat occupancy sensor, front passenger side
G179 Side airbag crash sensor, driver side
(driver door )
G180 Side airbag crash sensor, front passenger
side (front passenger door)
G256 Rear side airbag crash sensor,
driver side (C post)
G257 Rear side airbag crash sensor,
front passenger driver side (C post)
G283 Driver side front airbag crash sensor
(left front end)
G284 Front passenger side front airbag crash
sensor (right front end)
G551 Belt force limiter, driver side
G552 Belt force limiter, front passenger side
G553 Seat position sensor, driver side
G554 Seat position sensor, front passenger side
J393 Convenience system central control unit
J533 Data bus diagnostic interface (Gateway)
J623 Engine control unit
K19 Seat belt warning system warning lamp
K75 Airbag warning lamp
K145 PASSENGER AIRBAG OFF warning lamp
(optional)
N95 Airbag igniter, driver side
N131 Front passenger side airbag igniter 1
N132 Front passenger side airbag igniter 2
N153 Driver seat belt tensioner igniter -1N154 Front passenger seat belt tensioner igniter -1N199 Side airbag igniter, driver side
N200 Side airbag igniter, front passenger side
N250 Driver side airbag igniter -2N251 Driver side curtain airbag igniter
N252 Front passenger side curtain airbag igniter
N253 Battery isolation igniter
T16 16-pin connector, diagnostic port
J234 Airbag control unit
J285 Control unit with display in dash panel insert
12
433_024
13
Occupant protection
Driver airbag in the Audi Q5
Driver side airbag igniter 1 N95
Driver side airbag igniter -2- N250
All Audi Q5 models distributed world-wide are
equipped as standard with an adaptive driver
airbag.
This driver airbag has a single-stage solid fuel
generator with an additional external igniter.
Igniter 1 is activated electrically by the airbag
control unit J234, thus igniting the ignition charge.
Metal filter
Foil
Vent hole
Nozzle ports
Combustion of the ignition charge causes the
pressure inside the capsule to increase until it
bursts, thereby igniting the propellant charge
through the nozzle ports.
If the gas pressure produced by the combustion of
the propellant charge exceeds a predefined value,
the foil opens the vent holes. The gas is thus free to
flow unobstructed through the metal filter to the
airbag. The airbag unfolds and is inflated.
Metal filter
Foil
Vent hole
Propellant charge
Ignition charge
Driver side airbag igniter -2- N250 is located inside
the airbag module.
It is integrated in a unit comprising the baseplate, a
control ring with ports and the distributor housing.
433_025
Propellant charge
Capsule
Igniter 1
Distributor housing
Igniter 2
Control ring
Retaining clip
Baseplate
14
433_026
As long as igniter 2 is not activated, the supplementary vent holes in the distributor housing are kept
sealed by the control ring.
The gas from the gas generator flows out through
the upper ports in the distributor housing and
directly into the airbag. A retaining clip holds the
control ring in the rest position. This prevents
unwanted rotation of the control ring.
Distributor housing
Igniter 2
Control ring
Retaining clip
Baseplate
433_027
The airbag control unit J234 decides when to
activate igniter 2 N250 according to the force of
the impact and the driver's seating position.
When igniter 2 is ignited, the developing gas
pressure displaces a pin, which in turn rotates the
control ring. The supplementary vent holes in the
distributor housing are opened.
The residual gas from the gas generator can now
partially vent directly into the atmosphere.
The gas discharging from the airbag can also
escape into the atmosphere through the orifices in
the distributor housing. Thereby, the airbag is not
inflated any further and thus "adapted" to the
occupants.
Control ring
Baseplate
Pin
Distributor housing
Igniter 2
Retaining clip
433_028
The gas generator of the driver airbag module is oscillatingly mounted in a rubber ring in a fashion depending
on model type. This minimises steering wheel vibration.
15
Running gear
Axles
The Audi Q5 comes as standard with standard running gear (production control number 1BR) in combination
with quattro drive. An electronic damping control system is optionally available in combination with Audi
drive select.
Front axle
The front axle design is basically the same as that of the Audi A4 ‘08. The newly developed components are
indicated below.
Drive shaft
Track width
adjustment
(+29 mm)
Anti-roll bar
higher axle load,
larger track width (+58 mm)
than Audi A4
Springs/shock absorbers
new set-up
Upper wishbone bearing
new set-up
Subframe
Geometric modification due to
larger track width than Audi A4
16
433_144
Rear axle
The front axle design is basically the same as that of the Audi A4 ‘08. The newly developed components are
indicated below.
Anti-roll bar:
Shock absorbers:
new set-up
increased volume
higher heat output
new set-up, larger track width (+62 mm)
than Audi A4
Drive shaft:
track width adjustment
(+31 mm)
Wheel carrier:
higher axle load than Audi A4
Deleted: ball joint
Springs:
new set-up
Spring diameter
(+ 20 mm)
Subframe bearing:
transversely rigid and longitudinally
soft subframe bearings
front: conventional
rear: hydraulic
Subframe:
adjusted track width of
cross beam (+62 mm)
Stone chip protection:
Geometric modification due to
larger spring diameter than Audi A4
Track rod:
Adaptation to larger
spring diameter:
Installation rotated
through 180°
Rear wheel carrier/trapezoidal
link bearing:
Elastomer joint
higher axle load than Audi A4
433_145
17
Running gear
Damping control system
The damping control system is available as optional equipment in combination with Audi drive select under
production control number 1BL. The damping control system is designed, functions and operated in the
same way as the system in the Audi A4 ‘08. The detail modifications to the components are indicated below.
Body acceleration sensors
G341 – G343 on the front and rear axles:
Geometric modification due to
adaptation to body contour
Front and rear axle shock absorbers:
modified shock absorber set-up
ECD (electronically controlled damping)
control unit J250:
Software adjustment
18
Shock absorber damping adjustment valves
N336 – N339 on front and rear axles:
modified set-up
433_146
Level control system senders
G76 – G78, G289 on front and rear axles:
Geometric modification due to adaptation
to body contour
Steering system
The steering system of the Audi Q5 is basically designed and functions in the same way as the steering
system in the Audi A4 ‘08. A hydraulic rack and pinion steering system with a mechanically adjustable
steering column and power steering lock are used. The speed-sensitive power steering system is standard
equipment with engines developing 140 kW or higher. The dynamic steering system already featured in the
Audi A4/A5 ‘08 is optionally available in combination with Audi drive select. The detail modifications to the
components are indicated below.
Steering wheel:
Modifications to
Steering column:
larger rake angle due to
modified mounting bracket
modified adjustment range:
60 mm horizontal; 44 mm vertical
the airbag system
433_147
Steering gear:
The steering rack is 52 mm longer than in
the Audi A4 ‘08 due to the larger track width,
and piston diameter has been enlarged by
2 mm to 44 mm due to the higher axle load
Oil reservoir:
The oil reservoir with fine filter previously
used in the Audi A6 has been adopted
Dynamic steering
The dynamic steering system is designed and functions in the same way as the system in the Audi A4 ‘08.
The control software in the active steering control unit J792 has been adapted to suit the vehicle's
characteristics and the extended conditions of use.
19
Running gear
Steering pump
The volume-flow controlled vane steering pumps as
used previously in the Audi A4 ‘08 are also used in
all models which do not have dynamic steering.
Compared to the Audi A4 ‘08, the maximum delivery
rate (shut-off point) has been increased to 8.5 l/min
from 7.9 l/min to allow for the higher axle load of
the Audi Q5.
Models which have dynamic steering come
equipped with the steering pump with ECO function
as used previously in the Audi A4 ‘08 with dynamic
steering.
Volume-flow controlled vane steering pump
Reference
For detailed information about the design and mode
of functioning of the dynamic steering system,
please refer to SSP 402 - Dynamic Steering in the
Audi A4 ‘08.
For further information about the vane pump,
please refer to SSP 394 - Audi A5 - Running Gear.
Brake system
Wheel brakes
The wheel brakes are based on the proven concept
of the Audi A4 ‘08. In the Audi Q5, adaptation of the
wheel brakes to the higher performance demands
(larger wheel diameter, higher kerb weight) is
provided by a modified hydraulic transmission.
To this end, uprated brake pistons are used in
combination with large brake pad surfaces and
larger brake discs.
433_148
The brake discs have been designed for high
cooling capacity by means of special cooling ports
and friction interfaces. Special emphasis was
placed on systematic lightweight construction
during the development process. The front axle is
fitted with the proven FBC floating calipers
as used previously on the Audi A4 ‘08. This brake
caliper concept maximises rigidity and minimises
weight by means of composite technology (nodular
cast iron floating caliper, aluminium casing).
Reference
For detailed information about the design and
mode of functioning of the FBC brake calipers,
please refer to SSP 394 Audi A5 - Running Gear.
433_184
20
Front axle
Engine 4-cylinder 2.0l TDI
4-cylinder 2.0l TFSI
V6 3.0l TDI
V6 3.2l TFSI
Minimum wheel size 16“ 17“
Brake type TRW-FBC-60 16“ TRW-FBC-6017“
Number of pistons 1 1
Piston diameter (mm) 60 60
Brake disc diameter (mm) 320 345
Rear axle
Engine 4-cylinder 2.0l TDI
4-cylinder 2.0l TFSI
V6 3.0l TDI
V6 3.0l TDI
Minimum wheel size 16“ 17“
Brake type CII-43-EPB 16“ CII-43-EPB 17“
Number of pistons 1 1
Piston diameter (mm) 43 43
Brake disc diameter (mm) 300 330
Brake disc
Brake caliper
Brake pad
Gauge pin T40139
433_186
The rims and brake calipers have been designed in such a way that the thickness of the brake pads at all
wheels can be measured using gauge pin T40139.
21
Loading...