990243

eSelf Study Program 990243
The 2015 Audi Q3 Introduction
1
Audi of America, LLC
Service Training
Created in the U.S.A.
Created 5/2014
Course Number 990243
©2014 Audi of America, LLC
All rights reserved. Information contained in this manual is based on
the latest information available at the time of printing and is subject to
the copyright and other intellectual property rights of Audi of America,
LLC., its affiliated companies and its licensors. All rights are reserved
to make changes at any time without notice. No part of this document
may be reproduced, stored in a retrieval system, or transmitted in any
form or by any means, electronic, mechanical, photocopying, recording
or otherwise, nor may these materials be modified or reposted to other
sites without the prior expressed written permission of the publisher.
All requests for permission to copy and redistribute information should
be referred to Audi of America, LLC.
Always check Technical Bulletins and the latest electronic service repair
literature for information that may supersede any information included
in this booklet.
Note
This eSelf Study Program provides a basic knowledge of the design and functions of new models,
new automotive components or technologies.
It is not a Repair Manual! All values given are intended as a guideline only.
For maintenance and repair work, always refer to the current technical literature.
Revision 2: 6/2014
i
Reference
Contents
Introduction........................................................................................1
Dimensions ................................................................................................................................................................. 2
Body....................................................................................................4
Overview ..................................................................................................................................................................... 4
Body structure ........................................................................................................................................................... 6
Panorama glass sunroof ........................................................................................................................................... 8
Bumper system .......................................................................................................................................................... 9
Occupant protection......................................................................... 10
System overview ......................................................................................................................................................11
Front airbags ............................................................................................................................................................12
Engine............................................................................................... 16
The 2.0l TFSI engine ................................................................................................................................................16
Transmission..................................................................................... 18
6-Speed Automatic Transmission 09G/09M .........................................................................................................18
Haldex coupling................................................................................ 19
Engine/transmission mounting .............................................................................................................................21
Fuel system ..............................................................................................................................................................22
Exhaust system ........................................................................................................................................................23
Running gear.................................................................................... 24
Overview ...................................................................................................................................................................24
Front suspension .....................................................................................................................................................25
Brake system ............................................................................................................................................................27
Steering system .......................................................................................................................................................31
Wheels and tires / tire pressure indicator .............................................................................................................37
Electrical system.............................................................................. 38
Power supply ............................................................................................................................................................38
Data Bus On Board Diagnostic Interface J533 (Gateway) ....................................................................................39
Advanced Key ...........................................................................................................................................................42
Control module locations .......................................................................................................................................44
Topology ...................................................................................................................................................................46
Exterior lighting .......................................................................................................................................................50
Audi drive select .......................................................................................................................................................55
Climate control................................................................................. 57
Engergy efficiency ....................................................................................................................................................57
Refrigerant circuit ....................................................................................................................................................58
Networked components ..........................................................................................................................................60
Infotainment.................................................................................... 61
Overview of versions ................................................................................................................................................61
MMI displays ............................................................................................................................................................62
Installation locations of control modules .............................................................................................................63
Sound systems .........................................................................................................................................................64
Antenna overview ....................................................................................................................................................66
Service.............................................................................................. 67
Service interval overview for North American region ...........................................................................................67
Knowledge Assessment................................................................... 69
ii
iii
Introduction
As the most recent and compact addition to the Audi SUV
series, the Audi Q3 caters to the demands of a modern,
urban world while offering all the authentic plus-points of
an SUV (Sports Utility Vehicle). It complements the
successful Audi SUV family started with the launch of the
Audi Q7.
The Audi Q3 stands out by virtue of its sporty, muscular
appearance and its modern, coupe-like styling, and yet it is
an authentic SUV through and through. This concept makes
the Audi Q3 appealing to more than one target group
because it meets a wide variety of customer requirements.
The Audi Q3 is not what you would consider a "smaller sibling of
the Q5 and Q7", but a vehicle with a very distinctive identity. It has
the rugged character of a fully-fledged A-segment SUV coupled
with a coupe-like styling unmatched in this segment — and yet it
has all the hallmarks of an Audi. The Audi Q3 is compact, flexible
and functional and therefore is also a good option for people who
do a lot of city driving.
The growing number of Audi model series has also led to a growing
number of production sites. While the Audi Q3 is an all-new
addition to the model range, the production facility in Martorell,
Spain and is also a new addition to the Audi production network.
602_012
1
62.6 in (1590 mm)3
26.5 in
(675 mm)
Dimensions
42.0 in
(1067 mm)
61.9 in (1571 mm)
62.0 in (1575mm)
72.1 in (1831 mm)
79.5 in (2019 mm)
602_034
30.7 in (781 mm)
37.
(950 4 in.
mm
)
36.
(938 9 in.
mm
)
4
602_033
35.4 in (901 mm)
102.5 in (2603 mm)
34.7 in (881 mm)
172.6 in (4385 mm)
602_035
2
39.3 in
(1000 mm)
53.6 in (1362 mm)1
56.1 in (1426 mm)2
55.7 in (1417 mm)1
38.1 in (969 mm)2
64.2 in
(1632 mm)
34.6 in
(880 mm)
602_036
Length
172.6 in (4385 mm)
Cabin width, front
55.7 in (1417 mm)
Width
72.1 in (1831 mm)
Cabin width, rear
53.6 in (1362 mm)
Height
62.6 in (1590 mm)
Headroom, front
36.9 in (937 mm)
Track width, front
61.9 in (1572 mm)
Headroom, rear
37.4 in (950 mm)
Track width, rear
62.0 in (1575 mm)
Through-loading width
42.0 in (1067 mm)
Wheelbase
102.5 in (2603 mm)
Load sill height
30.7 in (781 mm)
Trailer load
with brake at a gradient of 8%
2204 lb (1000 kg)
Trunk capacity
16.2/48.2 cu ft
(460/1365 liters)
Curb weight
FWD: 3494 lb (1585 kg)
quattro: 3682 (1670kg)
Fuel tank capacity
16.9 gal (64 liters)
Max. gross weight
4651.7 lb (2110 kg)
Drag coefficient in cw
0.32
1)
width, shoulder room
2)
width, elbow room
3)
without a roof antenna, vehicle height is reduced by 0.7 in (18 mm)
4)
maximum headroom
All dimensions given refer to the unladen weight of the vehicle.
3
Body
Overview
The Audi Q3 body was developed with the focus on
lightweight design coupled with a high standard of vehicle
safety. The high quality of the materials in the Audi Q3
offers not only advantages in terms of weight reduction,
but also provides the basis for meeting the highest standards of vehicle safety.
Doors and lids
The vehicle doors are made of lightweight steel with double
sealing lines and sealed joined areas. Vehicle weight was
kept to a minimum by using a hood and rear lid made from
aluminum.
4
The body including the doors, hood and rear lid weighs
approximately 932 lb (423 kg). The body cell without doors
and lids accounts for approximately 668 lb (303 kg) of that
total.
602_099
Key:
Mild steels
Ultra-high-strength steels
High-strength steels
Ultra-high-strength hot-formed steel
Modern high-strength steels
Aluminum panels
5
Body structure
The main joining method used during Q3 body construction
is resistance spot welding. There are approximately 4000
spot welds in the body cell of the Q3.
High strength bonding processes are also used in body
areas with critical requirements for passive safety, comfort
and vibration reduction.
New adhesives are used for sealing and corrosion protection in addition to bonding in the Q3. For example, a
special expanding adhesive is used in the plenum chamber
which eliminates the need for additional sealing compounds.
In total, approximately 243 ft (74 m) of adhesive is used in
the body cell.
Ultra-high-strength hot-formed steel components
•
•
•
•
•
6
Bulkhead (tunnel bridge)
A-pillar, top
B-pillar, reinforcement
Chassis rail (sill)
Tunnel
B-pillar, inner panel
The B-pillar of the Audi Q3 is partially tempered in the
shaping process. This imparts ultra-high-strength properties to the steel in the top and bottom sections and only
high-strength properties to the steel in the mid-section.
The allows the forces exerted on the vehicle body during a
side impact to be effectively absorbed.
Ultra-high-strength
High-strength
Ultra-high-strength
602_101
602_100
Key:
Soft steels 26%
High-strength steels 42%
Modern high-strength steels 15%
Ultra-high-strength steels 4%
Ultra-high-strength hot-formed steels 13%
7
Panorama glass sunroof
A panorama glass sunroof is standard for the Q3. It has an
opening front glass element and a fixed rear glass
element.
It is designed as an externally guided roof system. This
means the front glass panel slides over the rear glass panel.
This design provides increased headroom inside the passenger compartment.
Operating components
The operating components of the roof system are housed
in the interior light module above the rear view mirror.
The roof is operated by a four-way, two stage switch. The
roof moves in the same direction the switch is moved. The
roof can be moved to any position using the first stage of
the switch.
With the second stage, the panel moves automatically into
its end position. Pushing the switch raises the roof to the
tilt position while pulling on the switch closes it.
Open glass panel
Close roller blind
Open roller blind
Tilted glass panel
Close opened glass panel
Close tilted glass panel
602_102
8
Bumper system
The front bumper and cover are designed to conform with
all applicable safety requirements, provide protection to
pedestrians, and be easy to repair. The supporting element
is the chrome frame around the radiator grille. The frame
is inserted into the mounting boxes of the plastic frame
during bumper assembly.
The rear bumper bracket (rebar) is made from aluminum.
The cover has two components. There is a bumper cover and
an additional lower spoiler and integrated diffuser for the
exhaust tail pipes. The pre-assembled parts are attached to
the body by guide pieces so it mounts flush to the body at
the sides.
The three part bumper cover and the front spoiler are
attached to the radiator grille. This multi-part design
allows individual components to be replaced so minor
damage can be repaired with a minimum of expense.
The wrap-around tailgate necessitated relocating some of
the tail lights to the bumper cover. These lights are integrated in the cover together with the sensors for the
optional Audi side assist and the antennas for the keyless
entry system. The parking aid sensors are attached to the
spoiler portion of the assembly.
602_104
Rear bumper bracket
Bumper cover
Spoiler
602_105
9
Occupant protection
The Q3 has the following occupant protection equipment
•
•
•
•
•
•
•
•
•
•
Airbag Control Module
Driver and passenger front airbags
Front side airbags (head/thorax airbag)
Front airbag crash sensors
Sideguard curtain airbags
Side impact sensors in the front doors
Rear side impact sensors
Front inertia reel safety pyrotechnic tensioners
Safety belt warning for all seats
Front passenger seat occupancy detection sensor
602_139
Key to illustration on following page:
E24		
E25		
E258		
E259		
Driver Seat Belt Switch
Front Passenger Seat Belt Switch
Driver Side Rear Seat Belt Switch
Passenger Side Rear Seat Belt Switch
G452		
G179		
G180		
G256		
G257		
G283		
G284		
G553
G554
Front Passenger Seat Occupant Sensor
Driver Side Airbag Crash Sensor
Front Passenger Side Airbag Crash Sensor
Driver Side Rear Side Airbag Crash Sensor
Passenger Side Rear Side Airbag Crash Sensor
Driver Front Airbag Crash Sensor
Passenger Side Front Airbag Crash Sensor
Driver Seat Position Sensor
Passenger Seat Position Sensor
J234		
J285		
J393		
J533		
J706		
Airbag Control Module
Instrument Cluster Control Module
Comfort System Central Control Module
Data Bus on Board Diagnostic Interface
Passenger Occupant Detection System Control
Module
10
K19		 Seat Belt Indicator Lamp
K75		 Seat Belt Indicator Lamp
K145		 Front Passenger Airbag Disabled Indicator Lamp
N95		
N131		
N132		
N153		
N154		
N196		
N197		
N199		
N200		
N202
N251		
N252		
N297		
N298		
Driver Airbag Igniter
Front Passenger Airbag Igniter 1
Front Passenger Airbag Igniter 2
Driver Seat Belt Tensioner Igniter 1
Front Passenger Seat Belt Tensioner Igniter 1
Driver Side Rear Seat Belt Tensioner Igniter
Passenger Side Rear Seat Belt Tensioner Igniter
Driver Thorax Airbag Igniter
Front Passenger Thorax Airbag Igniter
Passenger Side Rear Thorax Airbag Igniter
Driver Head Curtain Airbag Igniter
Front Passenger Head Curtain Airbag Igniter
Driver’s Seat Belt Tensioner Igniter 2
Front Passenger Seat Belt Igniter 2
T16		 Data Link Connector
System overview
Legend:
Powertrain CAN bus
Convenience CAN bus
602_003b
Diagnosis CAN bus
Input signal
Output signal
11
Front airbags
The driver’s front airbag is a single stage unit that uses a
solid propellant while the passenger side front airbag uses a
hybrid gas generator.
Driver Airbag Igniter N95
N95 is activated by Airbag Control Module J234 which
ignites the priming charge. The priming charge then
ignites the actual airbag propellant.
Outlet port
If the developing gas pressure exceeds a defined threshold
due to combustion of the propellant charge, the rupture
foil opens the outlets admitting the gas to the airbag.
The airbag unfolds and is inflated.
Spacer
Propellant charge
Rupture foil
602_001
Filter
12
Propellant charge
Igniter
Priming charge
Occupant protection
Front Passenger Airbag Igniter 1 N131 and Front Passenger Airbag Igniter 2 N132
This type of gas
generator allows variable
degrees of
Occupant
protection
inflation of the front passenger airbag. The Airbag Control
Module J234 determines the interval between activation
Front passenger side airbag igniter 2 N132
of the two igniters based on accident severity and front
Occupant
protection
passenger
position.
Like the driver airbag, the front passenger airbag is
This
type ofseating
gas generator
allows variable degrees of
Front
passenger
side airbag
igniter 1ItN131
equipped
with an adaptive
gas generator.
is a singleinflation of the front passenger airbag. The Airbag Control
stage hybrid
gas generator
with aigniter
second2discharge
Front
passenger
side airbag
N132 port.
Module J234 determines the interval between activation
of the two igniters based on accident severity and front
Like the driver airbag, the front passenger airbag is
This
type ofseating
gas generator
allows variable degrees of
passenger
position.
Front
passenger
side airbag
igniter 1It N131
equipped
with an adaptive
gas generator.
is a singleinflation of the front passenger airbag. The Airbag Control
stage hybrid
gas generator
with aigniter
second 2
discharge
Front
passenger
side airbag
N132 port.
Module J234 determines the interval between activation
The pyrotechnic propellant charge is integrated in the pressurized
gastwo
bottle.
The based
gas (95%
argon and
5% helium)
is kept at
of the
igniters
on accident
severity
and front
Like theofdriver
airbag, the5081
front psi
passenger
airbag is
a pressure
approximately
(400 bar.)
This
type ofseating
gas generator
allows variable degrees of
passenger
position.
The pyrotechnic
charge
is integrated
in the pressurized
gasofbottle.
Thepassenger
gas (95% argon
helium)
is
equipped
with anpropellant
adaptive gas
generator.
It is a singleinflation
the front
airbag.and
The5%
Airbag
Control
kept at
a pressure
of approximately
5081 psi
(400 bar.)
stage
hybrid
gas generator
with a second
discharge
port.
Module J234 determines the interval between activation
Pressurized gas
of the two igniters based on accident severity and front
passenger seating position.
The pyrotechnic propellant charge is integrated in the pressurized gas bottle. The gas (95% argon and 5% helium) is
kept at a pressure of approximately 5081 psi (400 bar.)
Like the driver airbag, the front passenger airbag is
equipped with an adaptive gas generator. It is a singleFront passenger side airbag igniter 1 N131
stage hybrid gas generator with a second discharge port.
The pyrotechnic propellant charge is integrated in the pressurized gas bottle. The gas (95% argon and 5% helium) is
kept at a pressure of approximately 5081 psi (400 bar.)
Propellant charge
The ignition charge fired by igniter 1 ignites the actual propellant charge. This causes the pressure inside the
pressurised gas bottle to increase until rupture disc 1 bursts. The gas mixture inflates and unfolds the airbag.
The ignition charge fired by igniter 1 ignites the actual propellant charge. This causes the pressure inside the pressurized
gas bottle to increase until rupture disc 1 bursts. The gas mixture inflates and unfolds the airbag.
The ignition charge fired by igniter 1 ignites the actual propellant charge. This causes the pressure inside the
pressurised gas bottle to increase until rupture disc 1 bursts. The gas mixture inflates and unfolds the airbag.
Igniter 1
The ignition charge fired by igniter 1 ignites the actual propellant charge. This causes the pressure inside the
pressurised gas bottle to increase until rupture disc 1 bursts. The gas mixture inflates and unfolds the airbag.
After a defined time period has elapsed, the airbag control module J234 activates igniter 2. A targeted pressure pulse
from igniter 2 causes rupture disc 2 to burst. Some of the remaining gas discharged from the pressurised gas bottle
now dissipates into the atmosphere and no longer into the airbag.
Disc 1
After a defined time period has elapsed, the airbag control module J234 activates igniter 2. A targeted pressure pulse
from
igniter time
2 causes
rupture
disc 2 to the
burst.
Somecontrol
of the remaining
gasactivates
discharged
from 2.
theApressurised
gas bottle
After
a defined
period
has elapsed,
airbag
module J234
igniter
targeted pressure
pulse
now
dissipates
intorupture
the atmosphere
no Some
longerof
into
airbag. gas discharged from the pressurized gas bottle now
from
igniter
2 causes
disc 2 to and
burst.
thethe
remaining
dissipates
intoned
thetime
atmosphere
and
no longer
into the
airbag.
After a defi
period has
elapsed,
the airbag
control
module J234 activates igniter 2. A targeted pressure pulse
from igniter 2 causes rupture disc 2 to burst. Some of the remaining gas discharged from the pressurised gas bottle
now dissipates into the atmosphere and no longer into the airbag.
Igniter 2
10
Disc 2
10
13
Inertia reel belts
The Audi Q3 is equipped with pyrotechnic safety belt tensioners in the front seats. The familiar ball-type safety belt
tensioners are used.
If the propellant charge is ignited, the expanding gases set
the balls in motion, driving them around a gear wheel into
the ball receptacle.
The safety belt tensioners are driven by balls stored in a
reservoir tube. In the event of a crash, the propellant
charge is ignited by the airbag control module.
The safety belt reel is coupled to the gear wheel and also
rotated by the balls, tightening/tensioning the safety belt.
This type of safety belt does not have the pyrotechnic belt
force limiter.
Pyrotechnic propellant charge
Seat belt
Ball receptacle
Gear wheel
Reservoir tube filled with balls
602_011
14
Notes
15
Engine
The 2.0l TFSI engine
Technical features
•
1st generation EA888 engine without AVS
•
Intake manifold with flaps
•
Four-valve cylinder head with continuously variable
intake camshaft timing
•
Cylinder head with Integrated Exhaust Manifold (IEM)
• Volume-controlled oil pump
• Die cast aluminium oil pan top section
(including alminium bolts)
• Weight reduced exhaust gas turbocharger housing
602_009
Reference
For further information about the design and operation of the 2.0l TFSI engine, refer to Self-Study Program
921703 "Audi 2.0L Chain-driven TFSI Engine".
16
Specifications
Torque-power curve
2.0l TFSI engine with engine code CCTA
Power in kW
Torque in Nm
Engine speed [rpm]
602_010b
Engine code
CCTA
Type
Four-cylinder inline engine
Displacement
121.1 cu in (1984 cc)
Power output
200 hp (150 kW) @ 5100 - 6000 rpm
Torque
207 lb ft (280 Nm) @ 1700 -5000 rpm
Number of valves per cylinder
4
Bore in mm
3.25 in (82.5 mm)
Stroke in mm
3.70 in (92.8 mm)
Compression ratio
9.6 : 1
Powertrain type
6-speed automatic transmission
Engine management
Bosch MED 17.1
Fuel
Premium unleaded (sulphur-free) 95 RON
Emissions standard
SULEV
CO2 emission in g/km
174
17
Transmission
6-Speed Automatic Transmission 09G/09M
The Japanese automatic transmission manufacturer AISIN
Co. LTD in conjunction with Audi engineers has adapted a
six-speed automatic transmission for the front wheel drive
and quattro versions of the Q3.
The transmission is adapted for use with different engines
and vehicles by varying:
• The number of disc pairs for clutches and brakes
• The adaptation of the ATF pressure on the clutches and
brakes
• The configuration of gear pairs, planetary gear sets (four
instead of three planetary gears), shafts and bearings
• The reinforcement of housing components
• The ratio of the final drive and the intermediate drive
• The size of the torque converter
s309_068
• The torque converter characteristic curve of the torque
boost (conversion factor or conversion boost)
• The selector lever
• The ignition key removal lock
The transmission sets new standards in dynamics and
efficiency through:
ATF cooler
Multi-function switch
• Low weight
• High overall transmission ratio spread
• Compact dimensions of the transmission
• High speed of shifting
• High level of shifting comfort
In addition to using conventional planetary gearsets, the
09G and 09M transmissions use a Lepelletier gear
arrangement.
The advantage of the Lepelletier arrangement is its simple,
space-saving and lightweight design. It combines a simple
planetary gear set with a subsequent Ravigneaux arrangement. This makes six speeds possible with only five shifting
elements
Electrical connections
s309_002
18
Haldex coupling
The drive train components of the Audi Q3 quattro are
based on proven technology and include the new 5th
generation Haldex coupling on quattro models.
An electric motor drives a six axial piston pump. The pistons
are pushed against an inclined thrust plate. When the
pump cylinder rotates, the pistons execute an axial stroke
and move the Haldex oil to the pressure side of the pump.
The most notable feature of the 5th generation Haldex
coupling is a new pressure control system. The hydraulic
pressure required for the Haldex coupling is produced by a
pump with centrifugal governor. The new Haldex coupling
is 3.7 lb (1.7 kg) lighter than the 4th generation coupling.
Rear axle drive 0CQ
Rear axle
drive vent
Final drive
Haldex coupling vent
All Wheel Drive Control Module
J492
Haldex Clutch Pump
V181
Haldex coupling
609_129
Reference
For more detailed information about the operation of the 5th generation Haldex coupling, please see
eSelf-Study Program 990143, The 2015 Audi A3 Introduction.
19
Function diagram
J492
1
2
1
2
3
4
5
6
7
J492:
V181:
8
All Wheel Drive Control Module
Haldex Clutch Pump
Term. 31
Term. 30
Term. 15
V181
Suspension CAN bus, high
609_136
Suspension CAN bus, low
All Wheel Drive Control Module J492 communicates with
ABS/ESP Control Module J104 and Power Steering Control
Module J500 over the Suspension CAN bus.
It communicates with Transmission Control Module J217,
Instrument Cluster Control Module J285, and Engine
Control Module J623 via Data Bus On Board Diagnostic
Interface J533.
Service
All Wheel Drive Control Module J492, Haldex Clutch Pump
V181 and flange for the propeller shaft are replaceable.
Various seals for the housing are also replaceable. Please
refer to the current repair literature for the latest
information.
Haldex oil filler and
inspection plug
All Wheel Drive
Control Module
J492
Flange
Haldex oil drain
plug
Axle oil filler and
inspection plug
Axle oil drain plug
Haldex Clutch
Pump V181
609_137
Oil bleed port for double
shaft oil seal
Oil change intervals
The Haldex oil must be changed every 3 years, regardless of
mileage. The axle oil is not subject to a change interval.
Note
Haldex oil and rear axle oil are NOT the same. Do not mix them up during service work or irreparable damage
to components will occur.
20
Engine/transmission mounting
The engine/transmission mounting is a key factor in
reducing unwanted noise and vibration transfer to the
passenger compartment.
The engine torque is absorbed by the stabilizer link rod,
which is designed as an elastomer bearing and connected
directly to the gearbox and vehicle body via the subframe.
The hydraulic damping in the bearings essentially reduces
low frequency engine/transmission movements to optimize
occupant comfort.
Overview
Hydraulic engine bearing
Damping fluid with injector plate
Carrier part
Support arm
Diaphragm
Hydraulic transmission bearing
602_097
Stabilizer link bar
21
Fuel system
The Q3 has a 16.9 gal (64.0l) saddle-type fuel tank. The
fuel tank version for the North Amerian market will also
have the required ORVR system (not shown.)
The lever-type sensor is mounted to the bottom-supported
swirlpot of the fuel delivery unit. Fuel supply is regulated
according to demand. Only the actual amount of fuel
needed is made available. Brushless, electrically
commutated fuel pumps are used.
A lever-type sender in each of the main and secondary
chambers ensures a high display accuracy. A three-wire
thick film sensor is used. The additional wire supplies a
redundant signal which is used to arithmetically eliminate
contact resistance factors created by the use of aggressive
fuels. Consequently, resistance is no longer a factor
affecting the accuracy of the display.
Fuel tank and fuel level sender
Connections for the activated charcoal filter (ACF)
Lever-type sender
Expansion tank
Bracket for
Fuel Pump Control Module J538
Float-type vent valve
with roll-over function
Main chamber
Fuel Pump
G23
Lever-type
sender 1
Lever-type
sender 2
Tank ventilation
Suction jet pump
Secondary
chamber
602_096
22
Exhaust system
The overall weight of the exhaust system was kept low
through the use of high grade stainless steel, low wall
thickness pipes and lightweight mufflers.
Both ceramic and metal catalytic converter substrates are
used in the exhaust gas after treatment system. To reduce
structure-borne sound, the shells of the rear silencer have
reinforcing beads.
Due to its low weight and low exhaust backpressure, the
overall catalytic converter and silencer system significantly
reduces CO2 emissions.
The 2.0l TFSI engine
Close-coupled catalytic converter with ceramic substrate
Decoupling element
Catalytic converter with ceramic substrate
Center muffler
(designed as a reflection muffler)
Rear muffler
(designed as an absorption muffler)
602_098
23
Running gear
Overview
A fundamental goal in the development of the suspension
system for the Audi Q3 was to set new standards in driving
experience in this premium SUV segment.
A vehicle weight distribution of 58% on the front suspension, the wide front and rear vehicle tracks, and the use of
larger diameter wheel and tire combinations enhances the
excellent driving characteristics of the Q3.
To achieve this, use is made of a newly designed MacPherson strut front axle with aluminium wishbones and a multilink rear suspension.
Versions
Only the standard suspension version will be available at
the launch of the Q3.
602_043
24
Front suspension
The front suspension of the Q3 is based on the transverse
platform (MQB) used throughout the Group.
A key new development is the control arm rear bearing. It is
a major factor contributing to outstanding steering
response and agility. Minimal bearing motion in the transverse direction provides a high camber thrust rate and
optimal cornering stability.
The front axle configuration in combination with the design
of the rubber bearings results in neutral handling at the
limit of adhesion with a slight understeer.
A large positive caster angle and wheel offset provides
excellent straight line stability.
602_044
Linear-rate steel springs with
progressive-rate polyurethane auxiliary
springs
Tube-type anti-roll bar
Anti-roll bar link
Coil-over suspension strut bearings with
separate spring/damper mountings
602_045
The control arm and wheel
carrier are connected by a
ball joint.
Wishbone
(forged aluminum part)
Three-piece engine/transmission
mounting
(aluminium chill casting)
Wheel carrier
(nodular cast iron)
25
Rear suspension
The rear suspension components of the front wheel drive
and quattro models are identical.
Upper control arm
(Welded sheet metal)
Spring link
(Welded steel)
Engine/final drive mount
(Sheet steel construction)
High-strength linearrate steel spring
602_046
Anti-roll bar link
(Steel construction)
Tie rod
(Sheet steel construction)
Suspension alignment
The front axle camber can be adjusted by equalization.
Front toe can be adjusted individually. Toe and rear camber
can be adjusted individually on the rear suspension.
Thin-walled
tubular anti-roll bars
Wheel carrier
(Aluminum
casting)
Wheel bearing with
integral wheel hub
Brake system
Overview
The Q3 uses a high performance ABS/ESP system by TRW
specially designed to meet the demands of an SUV.
The use of an electromechanical parking brake allows the
additional features of Hold Assist and speed dependent
emergency braking to be available for the Q3.
602_049
Brake specifications
Front axle
Rear axle
Engine type
2.0l TFSI
2.0l TFSI
Brake type
16“ FN3 57/25/13.5 floating caliper brake
16“ CII 41 EPB aluminium floating caliper with
actuators for the Electric Parking Brake (EPB)
Number of pistons
1
1
Piston diameter
2.24 in (57 mm)
1.61 in (41 mm)
Brake disc diameter
12.3 in (312 mm), vented brake discs
11.1 in (282 mm), solid brake discs
27
Brake servo and master brake cylinder
An 11-inch single brake booster with a “single rate”
characteristic is used on the Q3.
The aluminum tandem master brake cylinder with a 0.9 in
(23.8 mm) diameter provides the necessary performance
with short brake pedal travel and a low pedal actuation
force.
A non-contact Hall sensor is used to actuate the brake
lights.
602_052
Brake application
The foot pedal assembly is a modular design to save
weight. The pedals are manufactured from fiber-reinforced
plastic while the brake pedal bearing assembly is
manufactured as a sheet steel component with a weight
saving shell design.
612_030
Service operations
The service operations on the brake system are the same as
for systems already in use on other Audi models.
28
Electro-mechanical parking brake (EPB)
Design and operation
The Q3 uses an electromechanical parking brake system
similar those used in other Audi models.
In the Q3, Transverse Acceleration Sensor G200, Rotation
Rate Sensor G202 and Longitudinal Acceleration Sensor
G251 are integral with Electromechanical Parking Brake
Control Module J540. These integrated sensors replace ESP
Sensor Unit G419.
Parking Brake Pressure Switch
F234
Right Parking Brake Motor
V283
Electromechanical Parking Brake Control Module J540 with
Transverse Acceleration Sensor G200, Rotation Rate Sensor
G202 and Longitudinal Acceleration Sensor G251
602_054
Left Parking Brake Motor
V282
Service operations
If Electromechanical Parking Brake Control Module J540 is
replaced, it must be coded online. After the online coding,
the basic setting procedure must be carried out to calibrate
Transverse Acceleration Sensor G200 and Longitudinal
Acceleration Sensor G251.
29
ESP
Design and operation
The Audi Q3 uses and ABS/ESP system by TRW (TRW 450).
In addition to the basic functions EBD, ABS, ASR, EDL and
ESP, the following additional functions have been implemented:
Standard features:
•
•
•
•
•
•
Torque vectoring on vehicles with quattro drive
Hydraulic Brake Assist
Hydraulic brake booster
Brake disc wiper
Hydraulic brake fading compensation
Driver steering recommendation (DSR)
602_055
Active wheel speed senders are used on the Audi Q3.
602_056
Service operations
The ABS/ESP Control Module and hydraulic unit can be
sepa­rated for repair. The same condition applies here as to
the other Audi models: control modules can be replaced
indi­vidually but the entire ABS/ESP module must be
replaced if hydraulic modules are faulty.
After replacing an ABS/ESP Control Module, it must be
encoded online. Steering Angle Sensor G85 must be
calibrated and initialized through Power Steering Control
Module J500.
Several basic settings must then be configured. At the
same time, the brake pressure, longitudinal acceleration,
transverse acceleration and yaw rate senders are calibrated.
30
Steering system
Overview
The Q3 uses an electromechanical power steering system
similar to that used in the A7 Sportback. When compared
to conventional hydraulically boosted steering systems, the
electromechanical system reduces fuel consumption and
provides greater potential for optional equipment.
Mechanically adjustable steering column.
(approximately 2 in [50 mm] of vertical and
horizontal adjustment)
602_057
Electromechanical steering system with
axial parallel drive
31
Electromechanical steering
Overview
The compact unit consists of the actual steering gear, an
electric motor for power assistance, a control module, a
sensor for measuring steering torque and a sensor for
monitoring the position of the electric motor rotor.
Electromechanical Power
Steering Motor V187
Rack and pinion steering gear
Steering Torque Sensor G269
Power Steering Control Module J500
602_058
Recirculating ball nut
Drive
V187 is powered directly by Power Steering Control
Module J500.
The rotational movement of the motor is converted to the
linear movement of the steering rack by a recirculating ball
nut assembly. The ball nut is driven by a toothed belt.
The current intensity with which the motor is activated
regulates the amount of assist of the steering torque.
602_059
Electromechanical Power
Steering Motor V187
Toothed belt
Reference
For detailed information about the general design and function of the steering gear, refer to eSelf-Study
Program 990303, The 2012 Audi A7 Running Gear and Suspension Systems.
32
The recirculating ball nut is fixed in a longitudinal direction.
If it is turned, there is a linear movement of the spindle in
the direction of the arrow.
Direction of rotation of the
recirculating ball nut
Linear movement of the
spindle/rack
To restrict the contact among the ball bearings, “ball
circuits” that are as short as possible are used. This is why
the ball nut has individual circuits.
Rotation direction of the
recirculating ball nut
602_060
Ball race
Return channel
Recirculating ball nut
602_061
Linear movement of
the spindle/rack
Steering Torque Sensor G289
Steering torque is measured by Steering Torque Sensor G289.
The steering input shaft and steering pinion are
interconnected by a torsion bar. Turning the steering wheel
results in minimal rotation of the torsion bar and also the
input shaft relative to the steering pinion. The angle of
rotation is measured by the the sensor and is a direct
measure of steering torque.
Steering input
shaft
Steering Torque
Sensor G289
Steering pinion
602_062
33
Electromechanical Power Steering Motor V187
Toothed belt drive
pinion
The Audi Q3 uses a permanently excited three-phase AC
synchronous motor for steering assistance. This motor
concept was chosen on the basis of the following key
advantages:
• Synchronous motors are noted for their compact design
and high performance.
• Permanent excitation eliminates the need for slip rings
for transmitting the exciter current to the rotor.
The necessary phase voltages are calculated by the Power
Steering Control Module and applied through the power
output stages.
The stator has nine field coils arranged in groups of three
and connected in series. They are energized by a sine-wave
current. The three electric currents are phase offset
relative to one another. The three magnetic fields
generated produce a rotating magnetic field which induces
a synchronous rotational movement in the rotor.
Rotor position sensor
The rotor has six permanent magnets alternately arranged
in a north/south direction. For smoother running, the six
pole ring magnet is magnetized at an angle.
Stator
Rotor
602_063
Receiver coils
Rotor disc
Rotor position detection
The rotor position sensor monitors the position of the
rotor. The control module must know the exact position of
the rotor to be able to calculate the phase voltages
required for the rotating magnetic field (electronic sensor
controlled commutation). The measured value of the rotor
position sensor is also utilized to define the steering stops.
To avoid hard mechanical stops, "soft" limits stops are
implemented by the electromechanical steering system.
The exciter coil is supplied with a sine-wave exciter voltage.
The alternating magnetic field which develops around the
exciter coil acts upon the rotor disc. The rotor disc conducts
the magnetic flux of the alternating magnetic field
generated by the exciter coil to the receiver coils. This
induces in the receiver coils an alternating voltage which is
phase offset proportional to the position of the rotor disc
relative to the exciter voltage.
602_064
Exciter coil
34
General functional principle
When the steering wheel starts to turn, the torsion bar
connecting the steering input shaft to the steering pinion is
rotated. This rotation is measured by the steering torque
sensor and sent to the control module. At the same time,
the control module receives more signals relevant to the
operation of the steering system:
The control module evaluates this information and
calculates the electrical current and the phase shift
required by Electromechanical Power Steering Motor
V187. This is based on stored map in the control module.
When the motor is activated, its torque is transmitted to
the ball nut assembly by the toothed belt.
•
•
•
•
Depending on the drive current level, a defined amount of
torque is provided for steering assistance. The resultant
force acting on the steering rack is made up of the steering
torque applied by the driver and the torque generated by
the electric motor.
the steering angle from the Steering Angle Sensor G85.
the driving speed from the ABS/ESP Control Module
RPM for the Engine Control Module.
and the current position of Electromechanical Power
Steering Motor V187 through its rotor position sensor.
6
7
4
5
3
2
Steering movement by the driver
Direction of movement of the rotor
with recirculating ball nut
Force acting on the rack as the sum
total of the steering force applied by
the driver and the steering assistance
provided by the electric motor
1
602_065
Key:
1
2
3
4
5
6
7
Steering movement by the driver
Signal from the steering torque sensor
Signal from the steering angle sensor
Activation of the electric motor
Recirculating ball nut drive
Steering torque applied by the driver
Steering torque applied by the electric motor
35
Additional functions
Various adjustments and functions are implemented by the
electromechanical steering system in addition to its basic
assist function. The driver is assisted in certain driving
situations in the following ways:
• Speed-dependent power assisted steering (Servotronic)
is standard.
• Return of the steering wheel to the straight-ahead
position after steering lock has been applied is assisted
by the "active reset" function. This enhances both
directional stability and steering comfort.
• The "straight-ahead driving correction" function takes
the strain off the driver when driving in a straight line
against a constant, sustained crosswind or when driving
on a cambered road surface. A corrective steering torque
is generated by active steering assistance.
• The Audi Q3 also uses the "DSR" (driver steering
recommendation) function implemented previously in
the A7 Sportback in combination with ESP and electromechanical steering.
• Steering comfort is enhanced by implementing damped
maximum steering locks.
Operation and driver information
Audi drive select
Handbook
The driver can choose between three different steering
maps. Setting of the steering characteristic - from
comfortable to sporty - is coupled to the setting in Audi
drive select.
efficiency
dynamic
comfort
auto
Car Systems
European version
602_066
Service operations
Protective boots and track rods are the only individual
components that can be replaced at this time. In the event
of other component failures, the entire steering unit must
be replaced.
Power Steering Control Module J500 must be encoded
online. Once the “encode control module” Test Plan has
been initiated, the vehicle data record is downloaded. The
software for the particular vehicle is loaded from a central
database.
36
Within the encoding framework, the vehicle’s equipment
level is downloaded to the module.
Because the steering limit stops have not yet been stored in
the new control module, coding must be followed by
running the “Learn steering limit stops” Test Plan.
Steering wheels
The steering wheel and airbag have been systematically
designed for lightweight construction. Weight has been
reduced by approximately 1.1 lb (0.5 kg) by the use of
ultra-lightweight magnesium in the steering wheel
skeleton and fibre-reinforced plastic in the airbag.
The multifunction steering wheels allow user-friendly
operation of the driver information system including
telephone, audio devices and onboard computer.
Two additional optional paddle switches allow gear changes to be
performed manually on models with S tronic. The steering wheels
come in two optional color versions matching the vehicle interior.
Overview
Option
Option
Multi-function
sports steering wheel of
3-spoke design
Multi-function
sports steering wheel of
3-spoke design including shift
paddles
Wheels and tires / tire pressure indicator
Wheels and tires overview
The wheel/tire combinations used for the Audi Q3 ensure
superb handling, comfort and driving stability for a vehicle
of this class. All engine types are equipped with size
6.5J x 16 forged aluminium wheels even in the basic trim.
Standard 18“ wheels
Optional 19” wheel
7J x 18 ET43
Lightweight aluminium wheel,
brilliant silver finish
235/50 R18
8.5J x 19 ET36
5-Double-spoke-Offroad-Design
255/40 R19 all-season tires
Tire Pressure Monitoring System
The Q3 is equipped with the second generation tire
pressure monitoring system. By evaluating the vibration
characteristics of each wheel/tire, the new TPMS system is
capable of determining and indicating which tire is
experiencing pressure loss.
The system can also detect slow (gradual) pressure loss, as
well as simultaneous pressure loss at several wheels.
37
Electrical system
Power supply
Battery
Jump start points / fuses and relays
The vehicle battery is located in the engine compartment
and is protected by an insulating blanket. Battery size, type
and protection are dependent on engine, trim level and
country version. All Q3 models will have an energy management system and a brake energy recuperation* function.
The battery positive terminal and the ground stud near the
left-hand strut tower are used for battery charging and
jump starting.
The North American version of the Q3 will be equipped with
a 68Ah/ 280A battery and a 140A alternator.
Ground stud
Battery
e-box with fuses and relays.
Designation in Wiring Diagram: “SB”
Relay carrier below lefthand side of instrument
panel
Relay carrier on Vehicle
Electrical System Control
Module J519
Fuse carrier below left hand side of instrument
panel. Designation in Wiring Diagram: “SC”
Voltage test connectors on e-box.
Designation in Wiring Diagram:
“SA”
Relay carrier below the e-box
602_108
*Upon deceleration the energy created is lost. Brake energy recuperation recycles this energy to lighten the load on the engine. It can
reduce fuel consumption by up to 3%.
When coasting or braking, the car’s alternator generates energy. Brake energy recuperation allows this energy to be stored. When
accelerating or driving at a constant speed this stored energy is used so less energy is wasted in driving the alternator. This lowers fuel
consumption and CO2 emissions.
38
Data Bus On Board Diagnostic Interface J533 (Gateway)
Two versions of J533 are used on the Q3 dependent on the
Infotainment system. One version is for vehicles with an
Infotainment CAN and a version for vehicles with an optical
bus (MOST).
Depending on optional equipment, four LIN slave modules
could be connected to J533:
•
•
•
•
Power Sunroof Control Module J245
Roof Shade Control Module J394
Battery Monitoring Control Module J367
Alternator C
J245
J367
J394
C
J533
LIN
602_109
Summary
Designation
Data Bus On Board Diagnostic Interface J533
Installation
position
Under instrument panel, driver footwell
Bus systems
Convenience CAN bus (always installed)
100 kbit/s
Single-wire capable
Powertrain CAN bus (always installed)
500 kbit/s
Not single-wire capable
Instrument Cluster CAN bus (always installed)
500 kbit/s
Not single-wire capable
Diagnostics CAN bus (always installed)
500 kbit/s
Not single-wire capable
Extended CAN bus (option)
500 kbit/s
Not single-wire capable
Infotainment CAN bus (dependent on infotainment version)
100 kbit/s
Single-wire capable
MOST bus (dependent on Infotainment version)
22 Mbit/s
LIN bus
20 kbit/s
Ring structure
(open circuit results in failure)
Single-wire bus system
Tasks
•
•
•
•
•
Networking gateway
Diagnostic interface
Transport mode (for transportation or long periods of non-use)
Wake-up monitor (monitors bus standby mode or bus wake-up function)
Energy management
LIN master for:
• Battery Monitoring Control Module J367 (always installed)
• Alternator C (always installed)
• Control of the panorama glass sunroof and sunroof roller blind
LIN master for:
• Sunroof Control Module J245 (option)
• Roof Shade Control Module J394 (option)
Address Word
19
39
Battery Monitoring Control Module J367
Summary
Battery negative pole
Designation
Battery Monitoring Control Module J367
Installation position
on the negative terminal of battery
Tasks
Measurement of:
• car battery charging and
discharge currents
• battery voltage
• battery temperature
Address Word
None, LIN slave,
measured data and diagnostics via J533
Gateway
602_110
Battery monitor control module J367
Alternator C
Summary
Designation
Alternator C
Installation position
at bottom front right of engine,
driven by poly V belt
Tasks
Charging the vehicle battery
Address Word
None, LIN slave,
measured data and diagnostics via J533
(master)
602_111
Power Sunroof Control Module J245 and Roof Shade Control Module J394
Summary
Designation
Power Sunroof Control Module J245
Roof Shade Control Module J394
Installation position
in the roof area
Tasks
Opening and closing the sliding sunroof
or the sunroof roller blind
Address Word
None, LIN slave, measured data, diagnostics and Output Check Diagnosis via
J533 (master)
40
602_113
Vehicle Electrical System Control Module 1 J519
Summary
Designation
Vehicle Electrical System Control
Module J519
Equipment
Always installed
Installation position
Under the left side of the instrument
panel
Tasks
•
•
•
•
•
•
Central locking master
Exterior light master
Interior light master
Antitheft alarm master
Activation of various relays
Activation of various convenience
components:
• Seat heaters
• Heated windshield washer nozzles
• Windshield washer pump
• Headlight washer system pump
• Reading various switch and button
positions
• Reading various sensor values
Address Word
09
Data bus
communication
• Convenience CAN bus participant
• J519 is the LIN master for:
• LIN 1 – Light Switch E1, Wiper
Motor Control Module J400, Rain/
Light Recognition Sensor G397,
Humidity Sensor G355
• LIN 2 – Alarm Horn H12
• LIN 3 – Power Sunroof Control
Module J245, Anti-theft Alarm
System Sensor G578
Special feature
LIN 1 is distributed to two pins on J519.
J400 is connected to pin B30. E1, G397
and G355 – are connected to pin C28.
This means that the control modules
connected to pin C28 are also affected
in the event of a short circuit to positive
or negative at pin B30
610_009
J519
Reference
For a detailed description of Vehicle Electrical System Control Module J519, please see eSelf-Study Program
970343, The 2015 Audi A3 Vehicle Electronics and Drivers Assistance Systems.
41
Advanced Key
The Audi Q3 can be equipped with an advanced key.
Terminal 30
G416
Vehicle Electrical System Control Module 1 J519
7.5 A
Internal antenna
for central locking
"Terminal 50"Request
"Wake up"
Line
Convenience
CAN bus
NO contact
Electronic Steering Column
Lock Control Module J764
Access/Start Authorization Control Module J518
G415
Gearbox selector
position "P"
R139
Terminal 15
R138
R136
Terminal 58st
R135
7.5 A
R134
Terminal 30
E408
Engine Control
Module J623
E234
602_134
Key:
E234		 Release Button in Rear Lid Handle
R135		 Front Passenger Access/Start System Antenna
E408		 Access/Start Authorization Button
R136		 Access/Start System Antenna in Rear Bumper
G415		
Driver Exterior Door Handle Touch Sensor
R138		 Access/Start System Antenna 1 in Vehicle Interior
G416		
Front Passenger Exterior Door Handle Touch
Sensor
R139		 Access/Start System Antenna 2 in Vehicle Interior
R134		 Driver Access/Start System Antenna
42
Notes
43
Control module locations
Some of the control modules shown in this overview may
be optional and/or country specific.
Always refer to ElsaPro for details about control module
locations and instructions for installation and removal.
J387
J668
J745
J518
Ρ242
J540
J623
J685
J794
J500
J587
J255
J533
J743
J285
J217
J667
J764
J527
G85
J453
J104
J519
J386
Key:
G85 Steering Angle Sensor
J104
J217
J234
J255
J285
J386
J387
44
ABS/ESP Control Module
Transmission Control Module
Airbag Control Module
Climatronic Control Module
Instrument Cluster Control Module
Driver Door Control Module
Front Passenger Door Control Module
J388
J389
J453
J492
J500
J518
J519
J525
J527
J533
Left Rear Door Control Module
Right Rear Door Control Module
Multifunction Steering Wheel Control Module
All Wheel Drive Control Module
Power Steering Control Module
Access/Start Authorization Control Module
Vehicle Electrical System Control Module 1
Vehicle Electrical System Control Module 1
Steering Column Electronics Control Module
Data Bus On Board Diagnostic Interface
J389
J769
J791
J525
J492
J234
J770
Radio R
R41
J772
J388
602_092
J540
J587
J623
J667
J668
J685
J745
J764
J769
Electromechanical Parking Brake Control Module
Selector Lever Sensor System Control Module
Engine Control Module
Left Headlamp Power Output Stage
Right Headlamp Power Output Stage
Front Information Display Control Head
Cornering Lamp and Headlamp Range Control Module
Electronic Steering Column Lock Control Module
Lane Change Assistance Control Module
J770
J772
J791
J794
Lane Change Assistance Control Module 2
Rearview Camera System Control Module
Parallel Parking Assistance Control Module
Information Electronics Control Module 1
R
Radio
R41 CD changer
R242 Driver Assistance Systems Front Camera
45
Topology
Models with infotainment CAN bus
Alarm horn
H12
Wiper Motor
Control Module
J400
Anti-theft Alarm
System Sensor
G578
Rain/Light
Recognition Sensor
G397
Humidity Sensor
G355
Instrument Cluster
Control Module
J285
Vehicle Electrical
System Control
Module 1 J519
Multifunction
Steering Wheel
Control Module
J453
Data Link Connector
Steering Column
Electronics Control
Module J527
Data Bus On Board Diagnostic Interface J533
Climatronic Control
Module J255
Left Rear Door
Control Module
J388
Right Rear Door
Control Module
J389
Engine Control
Module J623
Transmission
Control Module
J217
Airbag Control
Module J234
Selector Lever
Sensor System
Control Module
J587
Steering Angle
Sensor G85
All Wheel Drive
Control Module
J492
ECD control unit
(electronically
controlled
damping)
J250
Parallel Parking
Assistance Control
Module J791
Power Steering
Control Module
J500
Headlight assist
control unit
J844
ABS/ESP Control
Module J104
Cornering Lamp
and Headlamp
Range Control
Module J745
Driver Door Control
Module J386
Front Passenger
Door Control
Module J387
Trailer detector
control unit
J345
Access/Start
Authorization
Control Module
J518
Electronic Steering
Column Lock
Control Module
J764
Vehicle tracking
system interface
control unit
J843
Rearview Camera
System Control
Module J772
Electromechanical
Parking Brake
Control Module
J540
Key:
46
Powertrain CAN bus
Infotainment CAN bus
LIN bus
Convenience CAN bus
Diagnostics CAN bus
Sub-bus systems
Extended CAN bus
Instrument cluster CAN bus
Power Sunroof
Control Module
J245
Roof Shade Control
Module J394
Radio
R
Front Information
Display Control
Head J685
Front camera for
driver assistance
systems
R242
Lane Change
Assistance Control
Module J769
Battery Monitor
Control Module
J367
Lane Change
Assistance Control
Module 2 J770
Alternator
C
Voltage
stabilizer
J532
Left Headlamp
Power Output
Stage
Right Headlamp
Power Output
Stage
602_091
47
Models with MOST bus
Alarm horn
H12
Wiper Motor
Control Module
J400
Anti-theft Alarm
System Sensor
G578
Rain/Light
Recognition Sensor
G397
Humidity Sensor
G355
Instrument Cluster
Control Module
J285
Data Link
Connector
Vehicle Electrical
System Control
Module 1 J519
Multi-function
Steering Wheel
Control Module
J453
Steering Column
Electronics Control
Module J527
Data Bus On Board Diagnostic Interface J533
Climatronic Control
Module J255
Left Rear Door
Control Module
J388
Right Rear Door
Control Module
J389
Engine Control
Module J623
Transmission
Control Module
J217
Airbag Control
Module J234
Selector Lever
Sensor System
Control Module
J587
Steering Angle
Sensor G85
All Wheel Drive
Control Module
J492
ECD control unit
(electronically
controlled
damping)
J250
Parallel Parking
Assistance Control
Module J791
Power Steering
Control Module
J500
Headlight assist
control unit
J844
ABS/ESP Control
Module J104
Cornering Lamp
and Headlamp
Range Control
Module J745
Driver Door Control
Module J386
Passenger Door
Control Module
J387
Trailer detector
control unit
J345
Access/Start
Authorization
Control Module
J518
Electronic Steering
Column Lock
Control Module
J764
Vehicle tracking
system interface
control unit
J843
Rearview Camera
System Control
Module J772
Electromechanical
Parking Brake
Control Module
J540
Key:
48
Powertrain CAN bus
Diagnostics CAN bus
LIN bux
Convenience CAN bus
Instrument cluster CAN bus
Sub-bus systems
Extended CAN bus
MOST bus
Front Information
Display Control
Head J685
Power Sunroof
Control Module
J245
Information
Electronics Control
Module J794
Roof Shade Control
Module J394
Radio
R
CD Changer R41
Front camera for
driver assistance
systems
R242
R
Media Oriented Systems Transport
Lane Change
Assistance Control
Module J769
Digital Sound
System Control
Module J525
Battery Monitoring
Control Module
J367
Lane Change
Assistance Control
Module 2 J770
Alternator
C
Voltage
stabilizer
J532
Left Headlamp
Power Output
Stage J667
Right Headlamp
Power Output
Stage J668
602_090
49
Exterior lighting
Xenon plus HID headlights
The Q3 comes equipped with Xenon plus headlights. The
daytime running lights and side light are provided by LEDs
via a plastic optical fiber cable. The two LEDs are mounted
on the LED module. They cannot be replaced separately.
In the event of a fault, the LED module can be replaced.
Daytime running light
and side light control unit
Turn signal
PY24W
Headlight range
control motor
Low and high beam gas
discharge lamp (D35)
Daytime running light and
side light
2 LEDs on LED module
Headlight power module
Gas discharge lamp
control unit
602_094
Light functions
Illuminants used
Power
Daytime running light
Parking light
2 LEDs with plastic optical fibers
(dimmed to approx. 25 %)
approx. 10 watts
Low beam
Cornering light
High beam
Gas discharge lamp D3S
35 watts
Turn signal
Bulb PY24W
24 watts
Fog light
(integrated in the bumper, not shown)
Bulb H11
55 watts
Daytime running light and side light
Both LEDs for the daytime running light are operated at
100% of their capacity.
The daytime running light is disabled when the turn signals
are activated.
50
Dynamic headlight range control
Convenience CAN bus
Schematic diagram of the activation mechanism for Xenon plus headlights
Xenon plus headlight
(one side of vehicle)
Discrete lines
Vehicle Electrical
System Control
Module 1 J519
Daytime running light and side light control unit > LED module
Turn signal 24 watt bulb > PY24W
Powertrain CAN bus
Ballast for gas discharge lamp > D3S
Cornering Lamp
and Headlamp
Range Control
Module J745
Power module for headlights
Private bus (sub-bus)
Discrete
lines
Left Rear Level
Control System
Sensor G76
Left Front Level
Control System
Sensor G78
Headlight range control servomotor
Dynamic cornering light servomotor
602_116
51
Tail lights
The Q3 for the North American market will be equipped
with LED tail lights. Some of the lights will be installed in
tailgate while additional lights will be installed in the lower
bumper cover.
The tail lights are activated by Vehicle Electrical System
Control Module 1 J519. The tail lights in the tailgate are
disabled when it is in the raised position. The tail lights in
the lower bumper spoiler are then illuminated.
None of the component parts of the LED tail lights in the
tailgate can be replaced.
LED tail light
Turn signal
Tail light
602_118
Brake light
Tail light
Light functions
Illuminants used
Activation mechanism
Power
Tail light
2 LEDs with plastic optical fibres
100%
approx. 2 watts
Brake light
18 red LEDs
100%
approx. 3.5 watts
52
Additional tail lights
Additional tail lights in the Audi Q3 are needed because the
tail lights also swing up when the tailgate is opened. They
are integrated in the bumper and accommodate the back-up
light and rear tail light functions, as well as the turn signal
and the tail/brake light when the tailgate is open.
Turn signal
The additional tail lights can be removed to replace the
bulbs from the rear bumper. A close-out cover which provides access to the light retaining bolts is integrated in the
bumper cover for this purpose.
Tail/brake light
602_119
Reflector
Back-up light
Rear fog light
Light functions
Illuminants used
Activation mechanism
Power
Tail light
Brake light1)
Bulb W16W
dimmed to approx. 30 %
100 %
16 watts
Turn signal1)
Bulb W16W
100 %
16 watts
Rear fog light
Bulb W16W
100 %
16 watts
Back-up light
Bulb W16W
100 %
16 watts
1)
1)
active only when tailgate is open
53
Additional tail light activation
The tail lights in the tailgate are deactivated when it is
raised. Their functions are taken over by the addtional
tail lights in the lower bumper cover.
To reliably detect an open tailgate, Rear Lid Alarm Switch
F123 and Rear Lid -closed- Sensor G525 are evaluated.
F123 has two microswitches in the tailgate lock. G525 is
a Hall sensor integrated in the rear lock plate cover.
J519 not only evaluates the operating states of both
switches, but also the time between the signals generated
by both switches. If the time lag is too long between both
signals when closing the tailgate, the additional tail lights
are not deactivated for safety reasons.
Schematic diagram of the circuit
Rear Lid Alarm Switch F123
Full lock
Prelock
Terminal 31
Vehicle Electrical System
Control Module 1 J519
602_120
Rear Lid -closed- Sensor 1 G525
High mounted brake light
The high mounted brake light is integrated in the rear
spoiler. It has a total of 48 LEDs. The component parts
of the light cannot be replaced. If a fault occurs, the
complete LED module must be replaced after first
removing the rear spoiler.
602_122
License plate lights
The license plate lights of the Q3 are also LED units.
Each light unit has two LEDs. They are activated by J519.
602_123
54
Audi drive select
The Q3 can be optionally equipped with Audi drive select.
The customer can chose between three operating modes:
comfort, auto and dynamic.
Audi drive select can be set using a button on the
instrument panel or through the MMI controls under the
CAR menu. The current operating mode is shown on the
MMI display.
Audi drive select
Handbook
Audi
drive select:
dynamic
dynamic
efficiency
comfort
auto
Car Systems
22315
km
D4
142.5
European version shown
+22.5°C
602_136
602_135
Controllable systems
The system is operated
using the buttons in the
center console
Operation via CAR menu in
Radio Media Center (RMC) or MMI
Accelerator/engine
Variable
characteristic
Servotronic
Variable
steering torque
602_137
55
Functional characteristics
Engine
comfort
auto
dynamic
D
S
D
S
D
S
Power/
torque
normal
normal
normal
normal
normal
normal
Load change
balanced
balanced
balanced
balanced
sporty
sporty
Engine
Drive-independent vehicle systems
comfort
auto
dynamic
comfortable
balanced
sporty
Steering
56
Climate control
Engergy efficiency
The fully automatic two-zone air conditioning system
regulates nominal temperature, air distribution and air
flow rate depending on sunlight intensity, interior and
exterior temperature. It also has a humidity sensor. A dew
point sensor and a windshield temperature sensor are
integrated in the base of the mirror to detect impending
fogging and to enhance climate comfort through passenger
compartment humidity management.
Equipment
Automatic climate control
system
Climate zones
Two-zone system
Interior filtering
Dust and pollen filter
without activated charcoal
Manual air circulation
yes
Automatic air circulation
yes
Sunlight photosensor
yes
Air quality sensor
yes
Cabin humidity sensors
yes
Seat heating levels
3
Glove compartment cooling
system
yes
Climatronic Control Module J255
In addition to controlling all functions of the climate
control system, J255 also houses the controls for the
heated front seats. They can be activated on three output
levels.
J255 receives information from the following sensors::
• Air Quality Sensor G238
• Sunlight Photo Sensor G107
• Humidity Sensor G355
Air from the passenger compartment is drawn into the
interior temperature sensor by Interior Temperature Sensor
Fan V42. If repairs are needed, V42 can be removed and
replaced separately.
Climatronic Control Module J255
602_038
Interior Temperature Sensor Fan
V42
The control module is held in place by clips and can be
easily removed with special tools.
Humidity management with combined rain, light and humidity sensor
The Q3 uses Humidity Sensor G355 to measure the
passenger compartment relative humidity and the
windshield temperature.
G397
G355
In vehicles with automatic light control and Climatronic,
G397 and G355 are combined in a single unit.
602_121
!
Note
New sensors are delivered with a transport protection cover which must be removed prior to installation.
57
Refrigerant circuit
The refrigerant circuit of the Q3 is designed for R134a
refrigerant. The circuit is controlled by a six piston
compressor, A/C Compressor Regulating Valve N280 and
an expansion valve. The receiver/drier is mounted on the
condenser and features a removable cartridge.
The high and low pressure service valves are located on the
right hand side of the engine compartment above the side
member.
High Pressure Sensor G65 sends its data by PWM signals to
Climatronic Control Module J255.
Design
Expansion valve
High Pressure Sensor G65
Passenger compartment heat
exchanger supply line
Connection for
refrigerant lines on
condenser
Passenger compartment heat exchanger
return line
Low pressure line
High pressure line
602_039
A/C compressor with A/C Compressor
Regulating Valve N280.
58
Cartridge-type receiver/drier
Air conditioner housing
The air conditioner housing of the has the following
features:
• A condensate drain that flows to the outside through
the center tunnel on the front passenger side.
• The passenger compartment heat exchanger can be
replaced without removing the instrument panel or
center console.
• The dust and pollen filter can be accessed from the front
passenger footwell.
Design
Central Air Door Motor V70
Defroster Door Motor V107
Left Temperature Door Motor
V158
602_040
59
Networked components
A/C Control Module J301 communicates with Vehicle
Electrical System Control Module 1 J519 and Instrument
Cluster Control Module J285 via the CAN data bus.
The heated front seats are operated via Front Seat Heating
Control Module J774. J774 is wired directly to the J519 and
therefore does not communicated over the data bus.
LIN
Instrument Cluster CAN bus
Convenience CAN bus
602_042
Key:
C18 Windshield Antenna Suppression Filter
G17 Outside Air Temperature Sensor
G65 High Pressure Sensor
G92 Temperature flap control motor potentiometer
G107 Sunlight Photo Sensor
G112 Central Door Motor Position Sensor
G113 Back Pressure Door Motor Position Sensor
G135 Defroster Door Motor Position Sensor
G143 Recirculation Door Motor Position Sensor
G150 Left Vent Temperature Sensor
G151 Right Vent Temperature Sensor
G192 Footwell Vent Temperature Sensor
G220 Left Temperature Door Potentiometer/Actuator
G221 Right Temperature Door Potentiometer/Actuator
G238 Air Quality Sensor
G261 Left Footwell Vent Temperature Sensor
G262 Right Footwell Vent Temperature Sensor
G263 Evaporator Vent Temperature Sensor
G344 Left Front Seat Temperature Sensor
G345 Right Front Seat Temperature Sensor
G355 Humidity Sensor
G397 Rain/Light Recognition Sensor
G645 Air Distribution Door Motor Position Sensor
J9
J59
J126
J255
J285
J301
J519
J533
Rear Window Defogger Relay
Load Reduction Relay
Fresh Air Blower Control Module
Climatronic Control Module
Instrument Cluster Control Module
A/C Control Module
Vehicle Electrical System Control Module 1
Data Bus On Board Diagnostic Interface
N24 Fresh Air Blower Series Resistor with Fuse
N280 A/C Compressor Regulator Valve
V2
Fresh Air Blower
V70 Central Air Door Motor
V71 Defroster Door Motor
V107 Defroster Door Motor
V113 Recirculation Door Motor
V158 Left Temperature Door Motor
V159 Right Temperature Door Motor
Z1
Z7
Z9
Z45
Z46
Rear Window Defogger
Driver Backrest Heating Element
Front Passenger Backrest Heating Element
Left Front Seat Heating Element
Right Front Seat Heating Element
Signal processing
In the Q3, virtually all sensor and actuator signals are read
and processed by the Climatronic Control Module. The
exceptions are: Outside Temperature Sensor G17 and
Humidity Sensor G355.
Instrument Cluster Control Module J285 processes the
temperature signal from G17. Its value is transmitted to
the Climatronic Control Module via the CAN bus.
60
Humidity Sensor G355 sends its data to Vehicle Electrical
System Control Module 1 J519 on a LIN bus. The data is
then transmitted to Climatronic Control Module over the
Convenience CAN bus.
Infotainment
Overview of versions
The Q3 will have two infotainment options available.
The standard equipment infotainment system features the
concert radio. The MMI Navigation plus system is optional.
The concert radio is based on the Radio Media Center (RMC)
infotainment platform. The MMI Navigation plus system is
based on the MMI 3rd generation plus (MMI 3G Plus)
infotainment platform.
The following table shows the key standard and optional
equipment features.
Concert radio
(North America)
MMI Navigation plus
(optional)
6.5“ TFT color monitor with 400 x 240 pixel resolution
7“ TFT color monitor with 800 x 480 pixel resolution
3D hard drive
navigation system
AM/FM radio with
phase diversity
AM/FM radio with
phase diversity and background tuner
Car menu
Car menu
CD drive
(MP3, AAC, WMA)
DVD drive
(Audio/Video, MP3, AAC, WMA, MPEG4)
1 SD card reader
(for SDHC cards with up to 32 GB of memory)
2 SD card readers
(for SDHC cards with up to 32 GB of memory)
20 GB jukebox
AUX In socket
Audi music interface (AMI)
Audi sound system
(10 x 180 watts)
Basic sound system
(4 x 20 watts)
Bluetooth interface
for HFP and A2DP (9ZX)
Premium speech dialogue system
1 SIM card reader
Bluetooth interface for HFP
and A2DP (9ZX)
Digital radio SDARS
Digital radio SDARS
CD changer (MP3)
CD changer (MP3)
Audi Sound System
Audi Sound System
BOSE Surround Sound (optional)
61
MMI displays
(Front Information Display Control Head J685)
The concert radio (RMC) has a 6.5“ TFT display with
400 x 240 pixel resolution.
MMI Navigation plus has a 7“ TFT display with a maximum
resolution of 800 x 480 pixels.
The displays are connected to Information Electronics
Control Module 1 J794 by a 4-pin connector. Two of the
Concert radio display
MMI Navigation plus display
62
four wires are used for image transfer by LVDS (Low Voltage
Differential Signaling). One wire is used for data transfer
by LIN bus. The fourth wire is a ground connection. Power
is supplied to the display through a separate connector.
This MMI display for vehicles in the North American market are
fixed in position and do not fold into the instrument panel.
618_016a
618_030a
Installation locations of control modules
Audi Q3 with MMI Navigation plus
Front Information Display Control
Head J685
CD Changer R41
602_020
Radio Control Module
Digital Sound System
Control Module J525
(only with Bose)
Information Electronics
Control Module 1 J794
63
Sound systems
The Audi sound system is standard equipment for the Q3.
The audio amplifier delivers a total power output of 180
watts distributed to 10 speakers.
If the concert radio is installed in the vehicle, the audio
amplifier is integrated with Information Electronics Control
Module 1 J794.
Q3 with standard Audi sound system
Center Speaker R208
Right Front Mid-bass
Speaker R102
Right Front Treble
Speaker R22
Right Rear Mid-bass
Speaker R160
Right Rear Treble
Speaker R16
602_021
Left Front Mid-bass
Speaker R101
Left Front Treble
Speaker R20
64
Left Rear Mid-bass
Speaker R159
Left Rear Treble
Speaker R14
Subwoofer
R211
Audi Q3 with BOSE Surround Sound
The optional BOSE Surround Sound System has 14 speakers
and delivers a total power output of approximately 465 watts.
The BOSE audio amplifier (Digital Sound System Control
Module J525) is installed in floor of the trunk.
Right Front Midrange
Speaker R104
Right Front Bass
Speaker R23
Center Speaker
R208
Right Front Treble
Speaker R22
Right Rear Mid-bass Speaker
R160
Right Rear Treble
Speaker R16
Right Effects
Speaker R210
602_022
Left Front Treble
Speaker R20
Left Front Midrange
Speaker R103
Left Front Bass
Speaker R21
Subwoofer
R211
Left Rear Mid-bass
Speaker R159
Left Rear Treble
Speaker R14
Left Effects
Speaker R209
Digital Sound System
Control Module J525
65
Antenna overview
Most of the antennas for the Q3 are integrated in the rear
window. Only the telephone and navigation antennas are
located in Roof Antenna R216.
Telephone
Navigation
602_031
Overview of rear window antennas with amplifiers
FM1/TV1 Antenna)
Antenna
Amplifier R24
FM1/AM
connection
AM Antenna)
602_023
Antenna Amplifier 3
R112
1)
integrated in rear spoiler
66
FM2
connection
Service
Service interval overview for North American region
Service recommendations can be viewed through the MMI.
• Oil change service
• Mileage based service events
• Time based service events
Flexible service event
(ROW)
Mileage based service event
Time based service event
625_073a
35,000 mi (56,000 km)
4 years
ser
v
cha
nge
25,000 mi (40,000 km)
3 years
Oil
15,000 mi (24,000 km)
2 years
ice
ice
ns
erv
Ins
pec
tio
ice
ser
v
nge
Oil
cha
ns
tio
Ins
5000 mi (8000 km)
1 year
pec
Oil
cha
nge
ser
er v
vic
e
ice
and
and
oil
oil
cha
cha
nge
nge
The first recommended oil change for Q3 in the North American region is at 5000 mi (8000 km) or at one year from
the date of delivery. An oil change and inspection service is recommended at 15,000 mi (24,000 km) Oil change service
is recommended 10,000 mi (16,000 km) thereafter with. See the chart below.
45,000 mi (72,000 km)
625_080
67
68
Knowledge Assessment
An On-Line Knowledge Assessment (exam) is Available for this eSelf-Study Program.
The Knowledge Assessment is required for Certification.
You can find this Knowledge Assessment at:
www.accessaudi.com
From the accessaudi.com Homepage:
•
Click on the “ACADEMY” tab
•
Click on the “Academy site” link
•
Click on the Course Catalog Search and select “990243b - Audi Q3 Introduction”
Please submit any questions or inquiries via the Academy CRC Online Support Form
which is located under the “Support” tab or the “Contact Us” tab of the Academy CRC.
Thank you for reading this eSelf-Study Program and taking the assessment.
69
990243
All rights reserved.
Technical specifications are
subject to change without notice.
Audi of America, LLC
2200 Ferdinand Porsche Drive
Herndon, VA 20171