Audi A8 2010 Instruction manual

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Workshop Manual
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl.
3.0 ltr. TFSI 4-valve)
Engine ID CGW
A
CGX
A
CMD
A
CGW
D
CTU
B
Edition 12.2011
Service
Service Department. Technical Information

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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
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List of Workshop Manual Repair GroupsList of Workshop Manual
Repair GroupsList of Workshop Manual Repair Groups
Repair Group
24 - Mixture preparation - injection
28 - Ignition system
Technical information should always be available to the foremen and mechanics, because their
careful and constant adherence to the instructions is essential to ensure vehicle road-worthiness and
safety. In addition, the normal basic safety precautions for working on motor vehicles must, as a
matter of course, be observed.
Service
All rights reserved.
No reproduction without prior agreement from publisher.
Copyright © 2011 Audi AG, Ingolstadt D3E80287B26

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
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Contents
24 - Mixture preparation - injection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1 Safety precautions and rules for cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 General notes on self-diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Safety precautions when using testers and measuring instruments during a road test . . . . 1
1.3 Safety precautions when working on vehicles with start/stop system . . . . . . . . . . . . . . . . 2
1.4 Safety precautions when working on the fuel system . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.5 Safety precautions when working on the injection system . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.6 Reducing pressure in high-pressure section of injection system . . . . . . . . . . . . . . . . . . . . 3
1.7 Checking fuel system for leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.8 Checking vacuum system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Injection system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Test data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Overview of fitting locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Air cleaner - exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.4 Removing and installing engine cover panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.5 Removing and installing air filter element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.6 Removing and installing air cleaner housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.7 Intake manifold (bottom section), fuel rail, injector - exploded view . . . . . . . . . . . . . . . . . . 22
2.8 Removing and installing intake air temperature sender G42 / intake manifold pressure sender
G71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.9 Removing and installing throttle valve module J338 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.10 Removing and installing regulating flap control unit J808 . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.11 Removing and installing intake manifold (bottom section) with fuel rail . . . . . . . . . . . . . . . . 27
2.12 Removing and installing injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2.13 Checking fuel pressure and residual pressure (up to high-pressure pump) . . . . . . . . . . . . 33
2.14 High-pressure pump - exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
2.15 Removing and installing high-pressure pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
2.16 Removing and installing high-pressure pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
2.17 Lambda probes - overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
2.18 Removing and installing Lambda probe G39 and Lambda probe after catalytic converter
G130 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
2.19 Removing and installing Lambda probe 2 G108 and Lambda probe 2 after catalytic converter
G131 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3 Engine control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
3.1 Wiring and component check with test box V.A.G 1598/42 . . . . . . . . . . . . . . . . . . . . . . . . 46
3.2 Removing and installing engine control unit J623 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
28 - Ignition system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
1 General notes and safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
1.1 General notes on ignition system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
1.2 Safety precautions when working on the injection and ignition system . . . . . . . . . . . . . . . . 50
1.3 Safety precautions when working on vehicles with start/stop system . . . . . . . . . . . . . . . . 51
1.4 Safety precautions when using testers and measuring instruments during a road test . . . . 51
2 Servicing ignition system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
2.1 Test data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
2.2 Ignition system - exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
2.3 Removing and installing ignition coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
2.4 Removing and installing knock sensors G61 / G66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
2.5 Removing and installing Hall senders G40 / G163 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
2.6 Removing and installing engine speed sender G28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
Contents i

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Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
ii Contents

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24 – Mixture preparation - injection
1 Safety precautions and rules for
cleanliness
1.1 General notes on self-diagnosis
♦ The engine control unit has a self-diagnosis capability. Before
carrying out repairs and fault finding, the event memory must
be interrogated. The vacuum hoses and connections must al‐
so be checked (unmetered air).
♦ Fuel hoses in engine compartment must only be secured with
spring-type clips. O-type clips or screw-type clips must not be
used.
♦ A voltage of at least 11.5 V is required for proper operation of
the electrical components.
♦ Do not use sealants containing silicone. Particles of silicone
drawn into the engine will not be burnt in the engine and will
damage the Lambda probe.
♦ The vehicles are fitted with a crash/fuel shut-off system. This
system is designed to reduce the risk of a vehicle fire after a
crash by deactivating the fuel pump via the fuel pump control
unit.
♦ At the same time, this system also improves the engine's start‐
ing performance. When the driver's door is opened, the fuel
pump is activated for 2 seconds in order to build up pressure
in the fuel system ⇒ page 2 .
♦ Use release tool -T40138- to unplug connectors that cannot
be accessed easily.
1.2 Safety precautions when using testers
and measuring instruments during a
road test
Note the following if testers and measuring instruments have to
be used during a road test:
WARNING
Accidents can be caused if the driver is distracted by test
equipment while road-testing, or if test equipment is not prop‐
erly secured.
Persons sitting in the front passenger's seat could be injured if
the airbag is triggered in an accident.
• The use of test equipment while driving causes distraction.
• There is an increased risk of injury if test equipment is not
secured.
♦ Test equipment must always be secured on the rear seat
with a strap and operated from the rear seat by a second
person.
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
1. Safety precautions and rules for cleanliness 1

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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
1.3 Safety precautions when working on ve‐
hicles with start/stop system
WARNING
Risk of injury due to automatic engine start on vehicles with
start/stop system.
♦ On vehicles with activated start/stop system (this is indi‐
cated by a message in the instrument cluster display), the
engine may start automatically on demand.
♦ Therefore it is important to ensure that the start/stop sys‐
tem is deactivated when performing repairs (switch off
ignition, if required switch on ignition again).
1.4 Safety precautions when working on the
fuel system
WARNING
♦ If the battery is not disconnected, the fuse for the fuel
pump control unit -J538- must be removed as a precau‐
tionary measure before opening the fuel system because
the fuel pump will otherwise be activated by the contact
switch on the driver's door.
♦ The fuel system is pressurised. The fuel pressure in the
high-pressure section of the injection system must be re‐
duced to a residual pressure prior to opening; for proce‐
dure see ⇒ page 3 .
♦ The connection must be opened immediately after reduc‐
ing the pressure; wrap a cloth around the connection and
allow the residual pressure (approx. 7 bar) to dissipate.
Even small amounts of dirt can cause malfunctions. When work‐
ing on the fuel supply system and injection system, pay careful
attention to the following basic rules:
♦ Carefully clean connection points and the surrounding area
with engine cleaner or brake cleaner and dry thoroughly before
opening.
♦ Seal off open lines and connections with clean plugs.
♦ Place parts that have been removed on a clean surface and
cover them over. Do not use fluffy cloths.
♦ Carefully cover or seal open components if repairs cannot be
carried out immediately.
♦ Only install clean components; replacement parts should only
be unpacked immediately prior to installation. Do not use parts
that have been previously unpacked and stored away loose
(e.g. in toolboxes, etc.).
♦ When the system is open: Do not work with compressed air.
Do not move the vehicle unless absolutely necessary.
♦ Protect unplugged electrical connectors against dirt and mois‐
ture and make sure connections are dry when attaching.
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
2 Rep. gr.24 - Mixture preparation - injection

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1.5 Safety precautions when working on the
injection system
To prevent injuries to persons and/or damage to the fuel injection
and ignition system, note the following:
♦ Persons wearing a cardiac pacemaker must at all times main‐
tain a safe distance from high-voltage components such as the
ignition system and xenon headlights.
♦ Always switch off the ignition before connecting or discon‐
necting electrical wiring for the injection or ignition system or
tester cables.
♦ For safety reasons, the battery must be disconnected before
opening the fuel system to prevent the fuel pump from being
activated by the contact switch on the driver's door.
♦ Do not open any fuel line connections while the engine is run‐
ning.
♦ Always switch off ignition before washing engine.
♦ If you want to crank the engine at starting speed without ac‐
tually starting the engine (e.g. compression test), first unplug
the electrical connectors from the ignition coils ⇒ page 53 .
♦ Also remove fuse for fuel pump control unit -J538- ⇒ Current
flow diagrams, Electrical fault finding and Fitting locations.
♦ Entries will be stored in the event memory of the engine control
unit if electrical connectors have been unplugged and the en‐
gine started.
Caution
To prevent irreparable damage to the electronic components
when disconnecting the battery:
♦ Observe notes on procedure for disconnecting the battery.
♦ Always switch off the ignition before disconnecting the
battery.
– Disconnect battery ⇒ Electrical system; Rep. gr. 27 .
1.6 Reducing pressure in high-pressure
section of injection system
WARNING
The fuel system operates at extremely high pressure. This can
cause injury.
♦ The injection system consists of a high-pressure section
(maximum approx. 120 bar) and a low-pressure section
(approx. 7 bar).
♦ The fuel pressure in the high-pressure section must be
reduced to a residual pressure of approx. 7 bar prior to
opening the system. The procedure is described below.
Special tools and workshop equipment required
♦ ⇒ Vehicle diagnostic tester
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
1. Safety precautions and rules for cleanliness 3

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Reducing fuel pressure in high-pressure section
– Connect a ⇒ Vehicle diagnostic tester.
– Start engine and run at idling speed.
– Select „Engine electronics“ in vehicle self-diagnosis.
– Then select „Basic setting“.
– Select „Reducing fuel pressure in fuel rail“ from the list.
– Then select „Measured values“.
– Select „Operating instructions and fuel pressure“ from the list.
– To activate basic setting, perform „Operating instructions“
function.
– Observe fuel pressure displayed on ⇒ Vehicle diagnostic test‐
er.
• Fuel pressure will drop to a specified value.
– Switch off engine with pedals depressed.
The fuel rail is still filled with fuel, however it is no longer under
high pressure.
WARNING
There is a risk of injury: avoid skin contact with fuel.
♦ The fuel lines are still filled with fuel, however the fuel is
no longer under high pressure. Wear safety goggles and
protective clothing when opening the fuel system.
♦ Before opening the high-pressure section, wrap a cloth
around the connection.
– The high-pressure system must be opened »immediately« af‐
ter reducing the fuel pressure; wrap a clean cloth around the
connection. Catch the escaping fuel.
Note
The pressure will increase again due to the effect of residual heat
if the high-pressure system is not opened immediately.
Additional steps required
– Erase event memory and generate readiness code in engine
control unit in „Guided Functions“ mode.
1.7 Checking fuel system for leaks
– Allow engine to run for several minutes at moderate rpm.
– Switch off ignition.
– Check complete fuel system for leaks.
– If leaks are found although the connections have been tight‐
ened to the correct torque, the relevant component must be
renewed.
– Road-test vehicle and accelerate with full throttle at least once.
– Then inspect high-pressure section again for leaks.
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
4 Rep. gr.24 - Mixture preparation - injection

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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
1.8 Checking vacuum system
Special tools and workshop equipment required
♦ Hand vacuum pump -VAS 6213-
Procedure
– Check all vacuum lines in the complete vacuum system for:
♦ Cracks
♦ Traces of animal bites
♦ Kinked or crushed lines
♦ Lines porous or leaking
– Check vacuum line to solenoid valve and from solenoid valve
to corresponding component.
– If a fault is stored in the event memory, check the vacuum lines
leading to the corresponding component and also check the
remaining vacuum lines leading to other components.
– If it is not possible to build up a vacuum with the hand vacuum
pump -VAS 6213- or if the vacuum pressure drops again im‐
mediately, check the hand vacuum pump and connecting
hoses for leaks.
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
1. Safety precautions and rules for cleanliness 5

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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
2 Injection system
2.1 Test data
3.0 ltr. TFSI engine
Idling speed Cannot be adjusted; regulated
by idling speed stabilisation
Fuel pressure before high-
pressure pump
3.0 ... 6.0 bar
Fuel pressure after high-pres‐
sure pump
30 ... 125 bar
2.2 Overview of fitting locations
Engine compartment (right-side)
1 - Charge pressure sender -
G31- / intake manifold temper‐
ature sender -G72-
❑ Fitting location
⇒ page 13
2 - Ignition coils for cylinder
bank 1
❑ Ignition coil 1 with output
stage -N70-
❑ Ignition coil 2 with output
stage -N127-
❑ Ignition coil 3 with output
stage -N291-
❑ Removing and installing
⇒ page 53
3 - Right electrohydraulic en‐
gine mounting solenoid valve -
N145-
❑ Fitting location
⇒ page 16
4 - Lambda probe -G39-
❑ With Lambda probe
heater -Z19-
❑ Fitting location
⇒ page 11
❑ Fitting location of con‐
nector ⇒ page 10
❑ Removing and installing
⇒ page 42
5 - Camshaft control valve 1 -
N205-
❑ Fitting location
⇒ page 13
6 - Electrical connectors
❑ Assignment of connectors ⇒ page 10
7 - Lambda probe after catalytic converter -G130-
❑ With Lambda probe 1 heater after catalytic converter -Z29-
❑ Fitting location ⇒ page 11
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
6 Rep. gr.24 - Mixture preparation - injection

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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
❑ Fitting location of connector ⇒ page 10
❑ Removing and installing ⇒ page 42
8 - Throttle valve module -J338-
❑ Fitting location ⇒ page 12
❑ Removing and installing ⇒ page 25
9 - Engine control unit -J623-
❑ Fitting location ⇒ page 9
❑ Removing and installing ⇒ page 48
10 - Intake air temperature sender -G42- / intake manifold pressure sender -G71-
❑ Fitting location ⇒ page 13
❑ Removing and installing ⇒ page 25
11 - Sender 1 for secondary air pressure -G609-
❑ USA version only
❑ Fitting location ⇒ page 16
12 - Activated charcoal filter solenoid valve 1 -N80-
13 - Engine speed sender -G28-
❑ Fitting location ⇒ page 15
❑ Removing and installing ⇒ page 56
14 - Knock sensor 1 -G61-
❑ Fitting location ⇒ page 11
❑ Fitting location of connector ⇒ page 10
15 - Injectors, cylinder bank 1
❑ Injector, cylinder 1 -N30-
❑ Injector, cylinder 2 -N31-
❑ Injector, cylinder 3 -N32-
❑ Removing and installing ⇒ page 30
16 - Temperature sender for engine temperature regulation -G694-
❑ Fitting location ⇒ page 12
17 - Intake manifold flap potentiometer -G336-
❑ Fitting location ⇒ page 13
18 - Hall sender -G40-
❑ Fitting location ⇒ page 13
19 - Fuel metering valve -N290-
❑ Fitting location ⇒ page 11
20 - Fuel pressure sender for low pressure -G410-
❑ Fitting location ⇒ page 11
Engine compartment (left-side)
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
2. Injection system 7

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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
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1 - Coolant temperature send‐
er -G62-
❑ Fitting location
⇒ page 14
2 - Intake manifold flap poten‐
tiometer 2 -G512-
❑ Fitting location
⇒ page 13
3 - Fuel pressure sender -
G247-
❑ Fitting location
⇒ page 12
❑ Lubricate threads
❑ 22 Nm
4 - Knock sensor 2 -G66-
❑ Fitting location
⇒ page 12
❑ Fitting location of con‐
nector ⇒ page 10
5 - Injectors, cylinder bank 2
❑ Injector, cylinder 4 -
N33-
❑ Injector, cylinder 5 -
N83-
❑ Injector, cylinder 6 -
N84-
❑ Removing and installing
⇒ page 30
6 - Secondary air inlet valve -
N112-
❑ Fitting location
⇒ page 15
7 - Intake manifold flap valve -N316-
❑ Fitting location ⇒ page 15
8 - Secondary air inlet valve 2 -N320-
❑ Fitting location ⇒ page 15
9 - Regulating flap control unit -J808-
❑ Fitting location ⇒ page 12
❑ Removing and installing ⇒ page 27
10 - Lambda probe 2 after catalytic converter -G131-
❑ With Lambda probe 2 heater after catalytic converter -Z30-
❑ Fitting location ⇒ page 11
❑ Fitting location of connector ⇒ page 10
❑ Removing and installing ⇒ page 44
11 - Engine fault warning lamp
❑ In instrument cluster
12 - Accelerator position sender -G79- and accelerator position sender 2 -G185-
❑ In accelerator pedal module; fitting location ⇒ page 10
13 - Brake light switch -F- / brake pedal switch -F47-
❑ Fitting location ⇒ page 10
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
8 Rep. gr.24 - Mixture preparation - injection

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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
14 - Electrical connectors
❑ Assignment of connectors ⇒ page 10
15 - Camshaft control valve 2 -N208-
Fitting location ⇒ page 14
16 - Lambda probe 2 -G108-
❑ With Lambda probe heater 2 -Z28-
❑ Fitting location ⇒ page 11
❑ Fitting location of connector ⇒ page 10
❑ Removing and installing ⇒ page 44
17 - Left electrohydraulic engine mounting solenoid valve -N144-
❑ Fitting location ⇒ page 16
18 - Ignition coils for cylinder bank 2
❑ Ignition coil 4 with output stage -N292-
❑ Ignition coil 5 with output stage -N323-
❑ Ignition coil 6 with output stage -N324-
❑ Removing and installing ⇒ page 53
19 - Valve for oil pressure control -N428-
❑ Fitting location ⇒ page 14
20 - Secondary air pump motor -V101-
❑ Fitting location ⇒ page 15
21 - Charge air cooling pump -V188-
❑ Fitting location ⇒ page 14
22 - Continued coolant circulation pump -V51-
❑ Equipment version or country-specific version
❑ Fitting location ⇒ page 15
23 - Hall sender 2 -G163-
❑ Fitting location ⇒ page 14
24 - Intake manifold temperature sender 2 -G430- / charge pressure sender 2 -G447-
❑ Fitting location ⇒ page 13
25 - Coolant valve for cylinder head -N489-
Fitting location of engine control unit -J623-
♦ -Item 2- in centre of plenum chamber
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
2. Injection system 9

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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Fitting location of accelerator position sender -G79- / accelerator
position sender 2 -G185-
♦ In accelerator pedal module
Note
The accelerator position sender -G79- and accelerator position
sender 2 -G185- are integrated in the accelerator pedal module
and cannot be renewed individually.
Removing and installing ⇒ Rep. gr. 20
Fitting location of brake light switch -F-
♦ In footwell on brake pedal
Removing and installing ⇒ Rep. gr. 45
Electrical connectors at rear right of engine
1 - For injectors on cylinder bank 1
2 - For throttle valve module -J338-
3 - For knock sensor 1 -G61-
4 - For Lambda probe -G39- with Lambda probe heater -Z19-
5 - For Lambda probe after catalytic converter -G130- with
Lambda probe 1 heater after catalytic converter -Z29-
Electrical connectors at rear left of engine
1 - For Lambda probe 2 after catalytic converter -G131- with
Lambda probe 2 heater after catalytic converter -Z30-
2 - For Lambda probe 2 -G108- with Lambda probe heater 2 -
Z28-
3 - For injectors on cylinder bank 2 and for fuel pressure sender
-G247-
4 - To knock sensor 2 -G66-
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
10 Rep. gr.24 - Mixture preparation - injection

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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Fitting location of Lambda probes on cylinder bank 1 (right-side)
1 - Lambda probe -G39- with Lambda probe heater -Z19-
2 - Lambda probe after catalytic converter -G130- with Lambda
probe 1 heater after catalytic converter -Z29-
Fitting location of Lambda probes on cylinder bank 2 (left-side)
1 - Lambda probe 2 -G108- with Lambda probe heater 2 -Z28-
2 - Lambda probe 2 after catalytic converter -G131- with Lamb‐
da probe 2 heater after catalytic converter -Z30-
Fitting locations at high-pressure pump
♦ On right side of cylinder head
1 - Fuel pressure sender for low pressure -G410-
2 - Fuel metering valve -N290-
Fitting locations below intake manifold (bottom section) on cylin‐
der bank 1 (right-side)
1 - Injector, cylinder 1 -N30-
2 - Injector, cylinder 2 -N31-
3 - Injector, cylinder 3 -N32-
4 - Knock sensor 1 -G61-
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
2. Injection system 11

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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Fitting location of temperature sender for engine temperature
regulation -G694-
♦ -Item 1- below intake manifold (bottom section) on cylinder
bank 1 (right-side)
Removing and installing ⇒ Rep. gr. 19
Fitting locations below intake manifold (bottom section) on cylin‐
der bank 2 (left-side)
1 - Injector, cylinder 6 -N84-
2 - Injector, cylinder 5 -N83-
3 - Injector, cylinder 4 -N33-
4 - Fuel pressure sender -G247-
5 - Knock sensor 2 -G66-
Fitting location of throttle valve module -J338-
♦ At rear of supercharger
Fitting location of regulating flap control unit -J808-
3 - Regulating flap control unit -J808-
♦ At rear of supercharger
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
12 Rep. gr.24 - Mixture preparation - injection

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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Fitting location of intake manifold flap potentiometer -G336-
♦ At front of intake manifold (bottom section, right-side)
Note
The fitting location of the intake manifold flap potentiometer 2 -
G512- is symmetrically reversed.
Fitting location of intake air temperature sender -G42- / intake
manifold pressure sender -G71-
♦ At rear of supercharger with charge air cooler
1 - Electrical connector for intake air temperature sender -
G42- / intake manifold pressure sender -G71-
Fitting location of charge pressure sender -G31- / intake manifold
temperature sender -G72-
♦ At right side of supercharger with charge air cooler
1 - Electrical connector for charge pressure sender -G31- / in‐
take manifold temperature sender -G72-
Note
Intake manifold temperature sender 2 -G430- / charge pressure
sender 2 -G447- are located symmetrically reversed.
Removing and installing ⇒ Rep. gr. 21
Fitting location of Hall sender and camshaft control valve on cyl‐
inder bank 1 (right-side)
1 - Camshaft control valve 1 -N205-
2 - Hall sender -G40-
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
2. Injection system 13

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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Fitting location of Hall sender and camshaft control valve on cyl‐
inder bank 2 (left-side)
1 - Hall sender 2 -G163-
2 - Camshaft control valve 2 -N208-
Fitting location of valve for oil pressure control -N428-
♦ On engine (bottom left)
4 - Valve for oil pressure control -N428-
Removing and installing ⇒ Rep. gr. 17
Fitting location of coolant temperature sender -G62-
♦ At front of engine
1 - Electrical connector for coolant temperature sender -G62-
Fitting location of charge air cooling pump -V188-
♦ Beneath longitudinal member (front left)
Removing and installing ⇒ Rep. gr. 19
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
14 Rep. gr.24 - Mixture preparation - injection

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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Fitting location of continued coolant circulation pump -V51-
♦ At front left of engine
Removing and installing ⇒ Rep. gr. 19
Fitting location of engine speed sender -G28-
2 - Electrical connector for engine speed sender -G28-
Fitting location of secondary air inlet valves and intake manifold
flap valve -N316-
♦ At rear of supercharger with charge air cooler
1 - Secondary air inlet valve -N112-
2 - Intake manifold flap valve -N316-
3 - Secondary air inlet valve 2 -N320-
Fitting location of secondary air pump motor -V101-
♦ In engine compartment (front left)
Removing and installing ⇒ Rep. gr. 26
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
2. Injection system 15

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Fitting location of sender 1 for secondary air pressure -G609-
♦ At rear of engine
Removing and installing ⇒ Rep. gr. 26
Fitting location of solenoid valves for electrohydraulic engine
mounting
♦ At engine mountings:
3 - Electrical connector for left electrohydraulic engine mounting
solenoid valve -N144-
Right-side: right electrohydraulic engine mounting solenoid valve
-N145-
Removing and installing ⇒ Rep. gr. 10
Audi A8 2010 ➤
Simos direct petrol injection and ignition system (6-cyl. 3.0 ltr. TFSI 4-valve) - Edition 12.2011
16 Rep. gr.24 - Mixture preparation - injection