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