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