NIe tak. Na pokładzie nowych samochodów jest często kilka sieci. Can szybki, łączy sterowniki odpowiedzialne za bezpieczeństwo, sterownik silnika, ABSu, SRS. Can wolny łaczy wyżej wymienione sterowniki z elementami mniej istotnymi dla bezpieczeństwa, licznik, moduł komfortu, klimatyzacja itp. Oprócz nich może być obecna jeszcze na pokładzie sieć VAN, LIN, MOST na światłowodzie itp. w załączniku jest omówienie sieci na przykładzie Audi A6, po angielsku, jak poszukasz, znajdziesz po polsku.
364
Vorsprung durch Technik www.audi.de
Service Training
Audi Q7 - Electrical System
Self-Study Programme 364
All rights reserved.
Technical specifications
subject to change without
notice.
Copyright
AUDI AG
I/VK-35
Service.training@audi.de
Fax +49-841/89-36367
AUDI AG
D-85045 Ingolstadt
Technical status: 10/05
Printed in Germany
A05.5S00.17.20
Self-Study Programmes on the Audi Q7
The Audi Q7 stands for 100% premium-quality electronics!
SSP 287 - Audi A8 ‘03 Electrical Components
There has been an enormous increase of the number of electronic control units over the past few years.
The majority of innovations made are only possible thanks to increasingly sophisticated electronics. Without
this development, many of the in-car comfort features which today are taken for granted would not be viable.
To keep pace with the increasing complexity of new vehicles, continuous learning is essential. The Self-Study
Programmes by AUDI are an efficient advanced learning tool as they enable you keep abreast of technical
developments.
– Bus Topology
– Control units
Order number: 000.2811.07.20
SSP 288 - Audi A8 ‘03 Distributed Functions
– Bus Topology
– Distributed Functions
To be able to offer customers with this diversity of
functions and equipment options, a multiplicity of
different electronic control units are required in the
Audi Q7. The control units do not work separately as
independent nodes, rather they are interconnected
via efficient bus systems. Depending on the
quantity of data to be exchanged, the MOST bus, an
optical data bus, a CAN bus or a LIN bus is utilised.
Data is also exchanged across the various bus
systems. A separate control unit provides the
interface between the various systems. Each control
unit is therefore supplied efficiently with the
information and vehicle operating variables which
its requires for optimal functioning.
Order number: 000.2811.08.20
SSP 344 - The New Audi A6 Avant ‘05
364_006
–
–
–
–
–
–
–
Body
Occupant Protection
Engine
Running Gear
Electrical System
Infotainment
Convenience Electronics
Order number: A05.5S00.13.20
SSP 326 Audi A6 ´05 Electrical System
–
–
–
–
Networking
Bus Topologies
Convenience Electronics
Infotainment
Order number: A04.5S00.09.20
Self-Study Programme 364 introduces you to the
network topology of the Audi Q7, and provides you
with an overview of the positions in the vehicle in
which electrical components are located. In addition
to obtaining service-related information on the
control units, you will learn the installation location
of each control unit and become familiar with its
tasks. You quickly and efficiently gain an insight into
the electronics in the Audi Q7.
SSP 375 Audi Q7 - New Driver Assist Systems
– Lane Change Assist (LCA)
– Optical Parking System (OPS)
– Rear-View Camera
Order number: A05.5S00.21.20
364_029
Into the lead: With design & performance
Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Fuses and relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation overview - control units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Networking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Control units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Data bus diagnostic interface J533 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control unit with display in dash panel insert J285 . . . . . . . . . . . . . . .
Onboard power supply control unit J519 . . . . . . . . . . . . . . . . . . . . . . .
Battery and energy management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alternator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front exterior light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear exterior light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Onboard power supply control unit 2 J520 . . . . . . . . . . . . . . . . . . . . . .
Entry and start authorisation control unit J518. . . . . . . . . . . . . . . . . . .
Door control units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat adjustment control units on driver and front passenger sides
J136 and J521 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Convenience system central control unit J393 . . . . . . . . . . . . . . . . . . .
Convenience system central control unit 2 J773 . . . . . . . . . . . . . . . . .
open sky system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer detector control unit J345 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear lid control unit J605 and
rear lid control unit 2 J756. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
This self-study programme teaches the design and function of new vehicle models,
new automotive components or new technologies.
The self-study programme is not a workshop manual!
All values given are intended as a guideline only, and refer
to the software variant valid at the time of publication of the SSP.
Please refer to the relevant Service Literature for current inspection, adjustment and repair instructions.
Reference
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Note
Overview
Fuses and relays
The fuse and electrics boxes
Fuse and relay carriers can be found in the following
locations in the new Audi Q7:
–
–
–
–
–
Dash panel, left and right adjacent the A-post
Engine compartment, rear left
Onboard power supply control unit
Electronics box under the left seat
Luggage compartment, right
For details of fuse and relay assignments, please
refer to the current service literature.
361_094
4
5
Overview
Installation overview - control units
364_004
Legend
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
6
Garage door operation control unit J530
Adaptive cruise control unit J428
Data bus diagnostic interface J533
Onboard power supply control unit J519
Headlight range control, control unit J431
Tyre pressure monitor control unit J502
Entry and start authorisation control unit J518
Steering column electronics control unit J527
Driver door control unit J386
Rear left door control unit J388
Front passenger door control unit J387
Rear right door control unit J389
Energy management control unit J644
Airbag control unit J234
Onboard power supply control unit 2 J520
Seat adjustment control unit with memory, front passenger J521
Battery A
364_005
Legend
20
21
22
23
24
25
26
27
28
29
30
31
32
33
Tailgate control unit J605
Tailgate control unit 2 J756
Reversing camera system control unit J772
Convenience system central control unit 2 J773
Convenience system central control unit J393
Additional heater control unit J364
Aerial reader unit for entry authorisation for keyless entry system J723
Parking aid control unit J446
Trailer detector control unit J345
Adaptive suspension control unit J197
Lane Change Assist control unit J769
Lane Change Assist control unit 2 J770
Reversing camera R189
Radio controlled clock receiver J489
7
Overview
Networking
Lane Change Assist
control unit 2
J770
Lane Change Assist
control unit
J769
Control unit with
display in dash panel
insert
J285
Adaptive cruise
control unit
J428
Data bus diagnostic
interface
J533
Engine
control unit
J623
Parking aid
control unit
J446
Engine
control unit 2
J624
Driver door
control unit
J386
Energy
management
control unit
J644
Yaw rate sender
G202
ABS
J104
Front passenger
door control unit
J387
Additional heater
control unit
J364
Seat occupied
recognition
control unit
J706
Airbag
control unit
J234
Rear left door
control unit
J388
Tailgate
control unit
J605
Automatic gearbox
control unit
J217
Rear right door
control unit
J389
Onboard power
supply control unit
J519
Headlight range
control, control
unit - J431
Seat and steering
column
adjustment
control unit with
memory
J136
Onboard power
supply control
unit 2 - J520
Adaptive
suspension
control unit
J197
Seat adjustment
control unit with
memory, front
passenger - J521
Entry and start
authorisation
control unit - J518
Comfort system
central control
unit 2 - J773
Convenience
system central
control unit
J393
Trailer detector
control unit
J345
Tyre pressure
monitor control
unit - J502
Power output
module for left
headlight
J667
Power output
module for right
headlight
J668
Steering angle
sender
G85
Climatronic
control unit
J255
Steering column
electronics control
unit - J527
Multi-function
steering wheel
control unit - J453
8
Reversing camera
system
J772
Rear Climatronic
operating and
display unit
E265
Mobile telephone
operating
electronics control
unit - J412
Telephone
transmitter and
receiver unit
R36
Front information
control unit
J523
Telephone
handset
R37
Navigation system
with CD drive
control unit - J401
TV tuner
R78
Voice input
control unit
J507
Radio
R
Mediaplayer in
Position 1
R118
MOST bus
Digital
sound package
control unit - J525
Digital radio
R147
Dash panel insert CAN
bus
Tailgate
control unit 2
J756
Diagnostics CAN bus
Powertrain CAN bus
Wiper motor
control unit
J400
Rain and light
detector sensor
G397
Sliding sunroof
control unit
J245
Sunroof roller blind
control unit
J394
Convenience CAN bus
CAN Extended
Rear sliding
sunroof
control unit
J392
LIN bus
Various subbus systems
Entry and start
authorisation switch
E415
Aerial reader unit for entry
authorisation for keyless entry
system - J723
Interior
monitoring sensor
G273
Alarm horn
H12
Sender unit,
front left
G431
Sender unit,
front right
G432
Sender unit,
rear left
G433
Sender unit,
rear right
G434
Rear tyre pressure
monitor aerial
R96
364_006
9
Control units
Data bus diagnostic interface J533
Modifications to Audi A6 ‘05
The data bus diagnostic interface of the Audi Q7 now has more powerful hardware and a new processor.
This was necessary due to the increasing number of messages which are required to be routed between the
various bus systems. No functional modifications were made to the diagnostic interface of the Audi A6 ’05.
The diagnostic interface with new hardware is also be introduced in the Audi A8 ’03 and A6 ’05 at a later date.
Master functions
●
Terminal 15 - powertrain CAN bus run-on
●
Sleep and wake-up of the data bus systems
●
Optical fibre break diagnostics of the MOST-Bus
●
Installation list
364_007
Variants
The data bus diagnostic interface is available in two
variants for the Audi Q7. The part numbers differ
from one another only in respect of the index. The
difference between the two variants is the
availability of a CAN Extended connection. This
connection is required if ACC or Lane Change Assist
is installed in the vehicle.
Installation location
The data bus diagnostic interface J533 is located on
the left behind the dash panel insert and is attached
to a mounting bracket.
364_008
10
Control unit with display in dash panel insert J285
364_009
Modifications to Audi A6 ‘05
The control unit with display in dash panel insert J285 is already known from the Audi A6 ’05. It was adapted
functionally to the new features of the Audi Q7.
Unlike the Audi A6 ’05, the Audi Q7 does not have an electro-mechanical parking brake; it is equipped with
a foot-operated mechanical handbrake. A switch, which is read by the control unit with display in dash panel
insert J285, is attached to the operating lever. When the switch is actuated, earth is connected and the
corresponding warning lamp is activated in the dash panel insert.
A new feature in the dash panel insert is the air spring suspension level indicator. This indicator is activated in
the centre display as soon as an automatic level change is performed. This is the case, for example, if the
system exits " lift " mode because a speed threshold has been exceeded; the suspension height will then be
lowered.
The level indicator can, however, be activated continuously by the driver by clicking the onboard computer to
the corresponding level with the Reset key.
A further new feature was implemented in the onboard computer. The driver has the option of displaying the
vehicle's current speed digitally. This is done by setting the onboard computer setting the onboard computer
to the corresponding level with the Reset key. On this level, the onboard computer variables can still be
retrieved in the case of a colour dash panel insert. The two diagrams show the vehicle speed display in
a colour dash panel insert and in a monochrome dash panel insert.
364_010
364_011
11
Control units
Inputs
Outputs
–
–
–
–
–
–
–
–
–
–
–
–
– Radio controlled clock voltage supply
– Terminal 58d (display illumination)
– Terminal 58s (switch illumination)
Oil pressure switch
Oil temperature and oil level sensor
Radio controlled clock signal
Brake pad/lining wear indicator wire
Fuel tank sender 1 and fuel tank sender 2
Washer fluid shortage indicator switch
Brake fluid shortage indicator switch
Handbrake applied recognition switch
Ambient temperature sensor
Auto Check button
Terminal 30
Terminal 31
Variants
The Audi Q7 comes with three different dash panel
insert variants. A monochrome dash panel insert is
standard equipment, but a dash panel insert with
colour display is also available. In the case of the
dash panel insert with colour display, a distinction
must be made between vehicle with or without ACC
function.
Inputs and outputs
– CAN bus lines of the dash panel insert CAN
– Wake-up line between diagnostic interface and
dash panel insert for mutual wake-up at
" terminal 15 OFF "
364_012
12
Onboard power supply control unit J519
The onboard power supply control unit J519 known
from the Audi A6 ‘05 and A8 ‘03 is employed in the
Audi Q7.
Various additional functions were implemented for
use in the Audi Q7.
Installation location
The onboard power supply control unit J519 is
installed in the cockpit at the front left on the
control unit holder adjacent the steering column.
Variants
Compared to the new Audi A6 ‘05, only the Midline
and Highline variants are installed in the Audi Q7.
This is necessary because a rear window wiper is
always installed in the Audi Q7. In the Midline
variant or higher, the onboard power supply control
unit drives the windscreen and rear window washer
pump V59. The Highline variant is required in
combination with the electrical steering column
adjustment.
364_013
Reference
For further information about the
onboard power supply control unit,
please refer to Self-Study Programmes
SSP 287, SSP 288 and SSP 326.
13
Control units
Master functions
– Exterior light control
– Coming home / leaving home
– LIN master for J400 - wiper motor control unit
– LIN master for G397 - rain and light detector sensor
Substitute master function
In case of failure of the convenience system central control unit J393, the onboard power supply control unit
J519 acts as the substitute master. It sends flash information via the CAN bus.
Other functions
– Voltage-encoded read-in of the rotary light switch
– Activation of the side lights warning lamp in the rotary light switch
– Electrical steering column adjustment
– Activation of the driver and front passenger footlights. The type of lighting, LED or conventional bulb can
be encoded in the onboard power supply control unit.
– Activation of the shift gate lighting
– Activation of the daytime driving lights
– Activation of the front and side turn signals
– Activation of the signal horn
– Activation of the windscreen and rear window washer pump V59
– Activation of the headlight washer system
– Activation of the rear window wiper motor V12
– Steering column adjustment memory
– Easy entry steering column adjustment
Emergency functions
If a fault is found in the rotary light switch or an open circuit in the wire to the rotary light switch, the onboard
power supply control unit automatically activates the light continuously.
If a fault has occurred in the light control, the light is activated continuously by the onboard power supply
control unit J519.
14
Battery and energy management
The energy management control unit J644 is
identical to the control unit already known from the
A6 ´05 and A8 ´03.
Installation location
The energy management control unit J644 is
installed below the left-hand seat adjacent the
battery case.
Seat frame
Battery
364_014
Energy management control unit
J644
Reference
For further information about the
energy management system, please
refer to Self-Study Programmes SSP
287 and SSP 326.
Express static current measurement
A so-called express static current measurement can be made in the Guided Fault Finding mode or the Guided
Functions mode under " 61 - Battery control - Static current measurement using J644 - energy management
control unit " . The energy management system measures the actual static current in approx. 15 minutes. If the
static current is too high, a faultfinding program can be started directly from this program.
15
Control units
Evaluating history data
The history data contains recorded information
about the onboard power supply.
Reference
For further information, please refer to
Self-Study Programme SSP 326.
Data records
The data can be read out in Guided Fault Finding
mode or the Guided Functions mode under
" 61 - Battery control " .
The following data records are available:
– Static voltage history
– Static current history
– Critical energy balance
– Power-down level history
– Battery change history
– Energy balance of the previous 5 trips
– Energy balance of the previous 5 standstill
periods
– Date/clock time programming in the dash panel
insert
Guided Fault Finding
Function/component selection
Select function or component
AUDI
Audi A6 2005 & gt;
2005 (5)
Saloon
BBJ 3.0l Motronic / 160 kW
Electrical system (Rep. Gr. 01; 90 - 97)
01 - Systems with self-diagnostic capability
61 - Battery control
J644 - Energy management control unit, functions
A - Battery, state of charge
A - Battery, battery test
J644 - Energy management, general description
J644 - Energy management control unit, encoding
J644 - Read history data
J644 - Energy management, read data blocks
J644 - Energy management, interrogate fault memory
J644 - Final control tests, alternator voltage
J644 - Replace control unit
J644 - Energy manager, activate/deactivate Transport mode
326_123
16
Structure of the data records
Static voltage history
In the static voltage history, it is possible to read out the following battery voltages:
●
12.5 V
●
12.2 V
●
11.5 V
The previous 4 entries, or " time stamps " , are displayed.
Display on tester
Static voltage & lt; 12.5 V : 46 hours
Static voltage & lt; 12.2 V : 18 hours
Static voltage & lt; 11.5 V : 9 hours
Display of the complete voltage undershoot for each voltage threshold
Static voltage history (raw data) =
2005-06-28, 10:12:00 * 0005 * 001 **
2005-06-14, 12:45:00 * 0001 * 001 **
2005-05-24, 10:26:00 * 0004 * 001 **
2005-05-17, 11:08:00 * 0002 * 001 * 00046 ***
Previous four values for static voltage & lt; 12.5 V
The most recent value is listed first
2005-06-24, 11:12:00 * 0004 * 001 **
2005-05-16, 10:36:00 * 0002 * 001 **
2005-04-20, 12:56:00 * 0003 * 001 **
2005-04-12. 16:03:00 * 0002 * 001 * 00018 ***
The previous four values for static voltage & lt; 12.2 V
The most recent value is listed first
2005-06-28, 10:12:00 * 0002 * 001 **
2005-06-17, 18:49:00 * 0003 * 001 **
2005-05-20, 11:16:00 * 0001 * 001 **
2005-04-22, 13:18:00 * 0001 * 001 * 00009 ***
Previous four values for static voltage & lt; 11.5 V
The most recent value is listed first
Structure of the data record
2005-06-28 , 10:12:00 * 005
* 001
* 0012
**
2005-06-28
Date: year, month, day
10:12:00
Time: hours, minutes, seconds
005
Time in hours which the actual voltage is below the set voltage, e.g. 12.5 V
001
Battery number
0012
Time stamp
Total time in hours which the actual voltage is below the set value. Only specified for fourth value.
The total may be larger than the total of the previous 4 entries, because all deviations below the voltage
threshold are counted for the battery which is fitted.
Prolonged deviations below 12.2 V and 11.5 V are particularly critical.
If the battery voltage is below these threshold values, the battery will not be able to regenerate. This can result
in damage to the battery after a lengthy standstill period.
If lengthy deviations below 12.2 V and 11.5 V are ascertained, the battery must be tested.
The data are recorded under the following test conditions :
– Terminal 15 OFF for at least 2 hours
– Convenience CAN bus in Sleep mode
– Power consumption less than 100 mA
17
Control units
Static current history
The previous 10 entries can be read out in the static current history.
Display on tester
An excessively high static current was measured for a total period of 136 hours.
Static current history =
2005-06-27, 11:14:00 * 0001 hours 00.60 A, static current
2005-06-20, 13:36:00 * 0001 hours 00.70 A, static current
2005-06-18, 19:19:00 * 0004 hours 01.00 A, static current
2005-06-10, 14:12:00 * 0002 hours 00.60 A, static current
2005-05-30, 11:47:00 * 0003 hours 00.70 A, static current
2005-05-29, 12:03:00 * 0002 hours 01.20 A, static current
2005-05-21, 10:59:00 * 0005 hours 00.80 A, static current
2005-05-14, 16:52:00 * 0001 hours 01.00 A, static current
2005-04-20, 11:28:00 * 0004 hours 00.60 A, static current
2005-04-18, 10:07:00 * 0002 hours 00.70 A, static current
The previous 10 entries are displayed.
An excessively high static current was measured for a total period of 136 hours.
Total duration with excessively high static current. The total may be larger than the total of the previous
10 entries, because all are counted for the battery which is fitted. This entry is not required for the analysis.
The evaluation of the previous 10 entries is important.
2005-06-27 , 11:14:00 * 00 hours
00, 60 A, static current
2005-06-27
Date: year, month, day
11:14:00
Time: hours, minutes, seconds
00 hours
Time in hours which the actual voltage is below the set voltage, e.g.
12.5 V
00, 60 A, static current
Time stamp
Battery number
The evaluation of prolonged deviations above the static current is important. If 0 or 1 is displayed for the
duration the deviation above the set value, this means that the duration of the deviation above the set value
was less than or equal to one hour. Such entries can be disregarded because they are caused, among other
things, by the " TP memory function " . If the value 0 is displayed for the static current, these are short current
peaks which can be disregarded.
High static currents can be caused by:
– the customer - if electrical consumers such as power supplies or vehicle fridges are connected to the
cigarette lighter supplied via terminal 30.
– the vehicle - in the event of a fault.
If the vehicle is required to have a high static current due to an awake bus system, no entry is made in the
history data under " Static current history " due to non-compliance with the test conditions (convenience CAN
bus must be in Sleep mode).
Test conditions are:
– Terminal 15 OFF for at least 2 hours
– Convenience CAN bus in Sleep mode
– Power consumption greater than 50 mA
The 50 mA current threshold consists of the following components:
– 25 mA max. permissible static current
– 25 mA for possible charging of the anti-theft alarm sounder
When a test is made using express static current measurement, 70 mA is output as the maximum permissible
static current. The difference can be attributed to an additional tolerance of 20 mA.
18
Critical energy balance
This data record is only written if the vehicle is in an energy critical state (breakdown risk). The data record is
written if the energy management control unit recognises the condition " vehicle cannot be started " . The most
recent data record is displayed at all times.
Display on tester
This data record is only written if the vehicle is in an energy critical state (breakdown risk).
00.05 A, mean static current
19.75 A, mean total current
-10.73 A, current at time of history data entry
17 %, battery state of charge
03 Mohms, internal resistance of the battery
+0118 Ah, energy throughput
-00067 Ah, energy balance
009624 km, mileage
2005-06-13, 23:24:47 time and date
Hazard warning OFF
Side lights OFF
Low beam headlight OFF
Fog light OFF
Main beam OFF
07.1 hours, terminal 15 ON
07.1 hours, data bus awake
007.1 hours, previous standstill period
00 number of data bus ON/OFF cycles
01 number of terminal 15 ON/OFF cycles
01 number of breakdown entries in history database
002 number of fitted (replaced) batteries in vehicle
Light status
Vehicle status
The data record is output together with the information in alphanumeric text. This simplifies evaluation.
Display on tester if no danger of breakdown risk existed
No entry exists. The vehicle is not in an energy critical state.
The " mean total current " is the value of " Engine OFF " up to the " limit of startability " . It therefore gives the
average electrical current until an entry was made.
The " current up to time of history data entry " gives the electrical current at the moment of entry or at the
moment of breakdown risk recognition.
The " battery state of charge " is recorded at the moment of triggering.
The " battery internal resistance " is recorded at the moment of triggering. The battery should internal
resistance of less than approx. 10 Mohms at al times. If the internal resistance is greater than this, the battery
should be checked. Please note that the internal resistance increases rapidly after the state of charge drops to
15-20 %. In the case of a fully discharged battery, values up to 99 Mohms may be indicated.
With regard to the energy throughput, it should be considered that a battery can deliver approx. 60 x of its
rated capacitance over its useful life.
The energy balance is the battery's " account " . If more current flows away from the battery than to the battery,
the value is negative. If the battery is fully charged, a 0 is displayed as the energy balance. As this value is
produced by current integration only, it loses significance with increasing battery age.
From the status of the lights and the vehicle, it can be ascertained whether an electrical consumer or the
ignition was " on " at the moment of recording, i.e. at the time of breakdown risk.
The " number of breakdown entries " indicates how often the energy management control unit has ascertained
an energy-critical balance which could lead to starting problems.
Generally, the history data must be read out rapidly in cases of complaint. If a new " breakdown risk " is
triggered by frequent ignition on/off cycles or short manoeuvres, the previous critical energy balance data will
be overwritten by the new data. This means that the data at the time of complaint is overwritten and therefore
lost, which, in turn, can complicate the problem handling process.
19
Control units
Power-down level history
The data on the previous 15 power-down levels is entered into the power-down level history.
Display on tester
Interpreting the data in the power-down level history:
Example: 2*2*-12.50*30*2003-10-31-10:10:25*0-0-0-0-0-0*06.5**
2 = power-down level 2 was set
2 = reason for triggering of power-down level (2 = low battery charge)
-12.50 = mean total discharge current in A during the set power-down level
30 = battery state of batches (SOC = state of charge)
2003-10-31 = date
10:10:25 = time
0 = hazard warning lights OFF (1 = hazard warning lights ON)
0 = parking lights OFF (1 = parking lights ON)
0 = side lights OFF (1 = side lights ON)
0 = low beam headlights OFF (1 = low beam headlights ON)
0 = fog lights OFF (1 = fog lights ON)
0 = main beam OFF (1 = main beam ON)
06.5 = terminal 15 " on " time in hours (engine was OFF during this period)
Power-down level history =
2*0*-04.57*77*2005-06-23, 14:02:19*0-0-0-0-0-0*03.1**
.
.
.
5*2*-10.76*21*2005-06-11. 10:38:45*0-0-0-0-0-0*06.7**
The previous 15 entries are displayed.
The data record is output together with the information in alphanumeric text. This simplifies evaluation.
Reasons for triggering
0 = electrical current related
1 = battery charge too low and/or battery internal resistance too high and/or capacitance loss Qv too high
2 = starting-critical battery voltage at present discharge current
3 = 1 and 2 simultaneously
4 = state of charge & lt; 30%
5 = 1 and 4 simultaneously
6 = 2 and 4 simultaneously
7 = 1, 2 and 4 simultaneously
Power-down levels are also registered in the fault memory. The difference to the history data is that the initial
activation of a power-down level is recorded in the fault memory in the new Audi A6 ‘05 and A8 ‘03. In the Audi
Q7, only the note " Energy management system active " is entered when any power-down level is set. The most
recent value is always output in the history data.
20
Battery change history
The data from the previous 3 battery changes is stored in the battery change history.
The entry in the history data is made when the battery energy management system is encoded.
Therefore, it is very important that the energy management control unit J644 only be encoded when a new
battery has actually been fitted. Encoding deletes all history data. In this case, it will not be possible to
perform, among other things, a reliable battery test using the VAS 5051, because this test utilises the history
data. Likewise, it will be very difficult for Audi AG to comment upon queries submitted through DISS, because
the history data is no longer available or is falsified.
Display on tester
The battery change history contains no more than 3 lines of data.
An evaluation of the data produced the following results:
Original battery serial number:
1401270070
2005-06-24, 12:03:17 time and date of removal of the battery.
-00050 Ah, energy balance of the removed battery
-240 Ah, energy throughput of the removed battery
Additional data
The following information can be read out with the " Additional data " button:
– Energy balance of the previous 5 trips
– Energy balance of the previous 5 standstill periods
– Time programming in the dash panel insert
Energy balance of the previous 5 trips
The energy balance and the duration of the previous 5 trips are recorded.
Display on tester
Energy balance of the previous 5 trips =
+003.5 Ah, energy balance, trip duration in hours 000.7
+010.3 Ah, energy balance, trip duration in hours 002.3
+008.2 Ah, energy balance, trip duration in hours 001.2
+003.5 Ah, energy balance, trip duration in hours 000.5
+001.3 Ah, energy balance, trip duration in hours 001.2
Negative energy balances mean that the battery was discharged during the trip!
Causes:
– driving short distances
– many electrical consumers
– low battery charge
In Audi vehicles, the alternators are always designed in such a way that discharge of the battery while driving
can only occur in very unfavourable operating situations. This means that the alternator must be tested for
proper function if the energy balance is negative for a prolonged period of time.
21
Control units
Energy balance of the previous 5 standstill periods
The energy balance and the duration of the previous 5 standstill periods are recorded.
Display on tester
- 007.1 Ah, energy balance, standstill period in hours: 034.0
- 009.5 Ah, energy balance, standstill period in hours: 063.6
- 000.4 Ah, energy balance, standstill period in hours: 001.2
- 002.1 Ah, energy balance, standstill period in hours: 003.7
- 010.3 Ah, energy balance, standstill period in hours: 004.3
A negative energy balance means that a number of electrical consumers were still active after the engine was
shut off.
This data is very useful if there is no data in the static current history. It is possible to ascertain whether the
battery was loaded or discharged after the engine was shut off.
Data for date/time programming in the dash panel insert
Display on tester
Data for date/time programming in the dash panel insert:
The data record indicates when, and how often the date/time display in the dash panel insert was changed.
In addition, it is possible to check whether the time has been set correctly in vehicles without a radio-controlled clock.
Number of date/time resets in the dash panel insert: 15
Each successive line consists of a time stamp pair. The first time stamp of the pair shows the time in the dash panel insert prior to the reset.
The second time stamp shows the adjusted time after the reset.
Causes of a reset are:
1st cause: battery was disconnected
2nd cause: low battery voltage
2005-06-29, 16:12:00*2005-06-30, 13:00:00
2005-05-01, 13:09:20*2005-05-01, 16:30:00
2005-04-03, 10:22:14*2005-04-03, 12:13:00
2005-02-11. 11:34:00*2005-02-13, 14:05:00
2005-02-01, 12:54:00*2005-02-01, 13:30:00
This data can be used to validate the time of reset. The most recent value is always found on the top line in the
history data. The energy management control unit J644 always writes the time and date along with the
current value. The time and date are made available by the dash panel insert on the data bus system. If the
time and date settings are incorrect, an old date will possibly be written along with a new entry.
22
Battery
The battery is located below the left-hand seat in order to save space. Direct access to the battery is not
necessary for charging and checking the state of charge of the battery.
There are two slave start connectors in the engine compartment for charging and external power supply.
The battery state is checked using the energy management control unit J644.
If it is necessary to replace and check the battery acid level (e.g. during routine service work), the seat can be
easily folded up after undoing two screws.
The following batteries are used:
●
80 Ah / 380 A
●
95 Ah / 450 A
●
110 Ah / 520 A
The choice of battery depends on:
– Engine
– Equipment
– Country
Battery test
A battery test can be performed using the energy management control unit J644. This test can be started in
the Guided Fault Finding mode or the Guided Functions mode under " 61-Battery control - A-Battery, test " .
The energy management control unit calculates from various measured values and the history data the state
of the battery and displays the following as a possible result:
– Battery OK
– Charge battery
– Replace battery
In the case of the Audi Q7, it is no longer necessary to test the battery using battery tester VAS 5097A.
The advantages of this new test method are:
– It is not necessary to charge the battery prior to the test.
– It is not necessary to disconnect the battery from the onboard power supply.
– It is not necessary to remove the battery.
The battery acid level can be checked visually in the usual way.
23
Control units
Battery replacement
When the vehicle battery is replaced, the energy management control unit J644 must be encoded.
This is necessary to adapt the new battery (size, manufacturer, new condition) to the energy management
system. Only then will the energy management system function with maximum efficiency and precision.
The energy management control unit J644 may only be encoded after a battery is replaced. Otherwise, faults
will be produced in the vehicle due to incorrect assessment of the battery state and loss of important history
data, which is required, among other things for testing the battery with the VAS tester.
Trickle charge
To conserve battery power in showroom vehicles
and vehicles in the workshop, a VAS 5095A,
VAS 5900 or VAS 5903 charger must be connected to
the designated slave start connector in the engine
compartment on the left-hand side. This will prevent
exhaustive discharging of the battery.
364_016
Slave start connector
Positive
Slave start connector
Negative
Disconnecting the vehicle battery
To disconnect the earth wire of the vehicle battery, it is not necessary to fold up the seat.
The battery's earth wire of the battery can, when necessary, be disconnected at the earth connector in front of
the left-hand seat.
Cover in front of left-hand seat
Earth connector
364_017
24
364_018
Alternator
Functional principle of the alternator regulator
The current output of the alternator depends on the excitation voltage, and hence the excitation current.
Transistor T connects the voltage applied to B+ to the excitation winding at a frequency of approximately
150 Hz. The resultant excitation current IExc or IExc_eff, from 0 A to max. 8 A, is directly proportional to
alternator current output.
IExc_eff
IExc
364_056
UErr = UExc
IErr = IExc
364_057
Alternator characteristic
The diagram gives a qualitative overview of the relationship between speed and current output under full
alternator load, i.e. the characteristic curve gives the maximum possible current output for each speed.
364_061
25
Control units
Close attention is normally given to two operating points. This is firstly the point at 1800 rpm (equivalent to
idling speed, green marks) and, secondly, the setpoint at 6000 rpm (red mark).
In the case of an 140 A alternator, for example, this value always refers to the setpoint at 6000 rpm. Some
nameplates display values such as 75-140 A. The first value denotes the maximum possible current output at
1800 rpm, i.e. 75 A, and the second value corresponds to the setpoint (140 A at 6000 rpm).
Notes
- The characteristic data always refers to
operation at room temperature.
- In this context, " speed " means
alternator speed, and not the engine
speed.
The following alternators are used in the Audi Q7:
Manufacturer
Alternator type
I_max @ 1800 rpm
I_max @ 6000 rpm
100-150 A
TG16
100A
150A
Valeo
105-180 A
TG17
105A
180A
Hitachi
26
Alternator data
Valeo
140-210 A
HTC 190A
140A
210A
Alternator warning lamp
The warning lamp indicates a fault in the alternator or a malfunction in the vehicle electrical system.
The alternator sends status messages to the energy management control unit J644 via the bit-synchronous
interface. These status messages are the basis for the activation of the warning lamp.
The information for activating the warning lamp is sent to the convenience CAN bus by the energy
management control unit J644 and relayed to the dash panel insert CAN bus via the data bus diagnostic
interface (gateway) J533. The control unit with display in dash panel insert J285 reads this information from
the dash panel insert CAN and activates the warning lamp.
The warning lamp is activated if any of the following faults occur:
– The engine is running and a mechanical fault is present in the alternator for at least 10 seconds.
– An electrical fault is present in the alternator or at the bit-synchronous interface for at least 10 seconds.
Both faults trigger entries into the energy management control unit J644.
The warning lamp is not activated:
– No communication between the energy
management control unit J644 and the control unit
with display in dash panel insert J285.
Control unit with display in
dash panel insert J285
Dash panel insert CAN bus
Data bus
diagnostic
interface
J533
Energy
management
control unit
J644
Convenience
CAN bus
Alternator
364_059
The alternator or the regulator in the alternator can
send 3 fault messages via the bit-synchronous
interface to the energy management control unit:
– Mechanical faults
– Electrical fault
– High-temperature fault
Note
Important! If the regulator is faulty, it is
possible that the alternator warning
lamp is not being activated. This is the
case if a fault in the regulator is
preventing information from being sent
to the bit-synchronous interface.
As a result, the energy management
control unit J644 does not receive any
information on the activation of the
warning lamp.
27
Control units
Alternator test
The following tests are necessary for diagnosis of the regulator:
– Rated voltage
– Undervoltage
– Overvoltage
Voltages are ideally measured directly at the alternator connected to B+. If it is not possible to gain access to
the measuring point, the voltage can also be measured at the slave start connectors.
Rated voltage
The alternator regulator must supply at least 14.3 V.
Undervoltage
The alternator voltage should not be less than 13 V. 13 V are still allowable at low speed and when electrical
consumers are active.
Overvoltage
The alternator voltage must not exceed 15.5 V at high speed and when few electrical consumers are active.
The following are indications of a faulty diode in the alternator:
– Alternator makes loud noise.
– Very high ripple content when measuring harmonic content with the DSO.
28
Front exterior light
Layout of the front lights
Turn signals
Low beam headlight
Main beam
Turn signals and side lights
Fog light
364_020
Slide system for the headlights
By using a slide system, it is possible to remove the headlight without dismantling the bumper. This makes it
easier to replace bulbs in the service workshop.
For further information on replacing bulbs, please refer to the Audi Q7 Owner's Manual.
Unlocking
364_062
364_063
The headlight can be pulled out to the front after
unlocking and disconnecting the electrical wiring.
Please follow the instructions in the current
workshop manual.
Replacing the bulbs
Almost all bulbs can be replaced using the vehicle's
tool kit.
For further information on replacing bulbs, please
refer to the Audi Q7 Owner's Manual.
The following cannot be replaced by the customer:
Xenon lamps, turn signal lamps in the mirrors, highlevel brake light.
364_064
29
Control units
Rear exterior light
Layout of the rear lights
The main rear lights are integrated in the tailgate. Due to the fact that the rear lights also swing upward when
the tailgate is opened, additional fixed rear lights are required in the bumper. When the tailgate is opened, the
system changes over to the additional rear lights. The brake/tail lights, two for each side of the vehicle and the
turn signals, are integrated in the rear lights. The additional brake/tail lights and the additional turn signals
are integrated in the additional rear lights in the bumper.The reversing lights and the rear fog lights are also
integrated in the bumper.
Brake/tail light
Brake/tail light
Turn signal
Turn signal
Rear fog light
Brake/tail light
Reversing light
364_021
Variants
The rear lights are available in country-specific variants:
●
ECE (e.g. Europe)
●
SAE (e.g. North America)
Activation of the rear lights
Activation by convenience system central control unit J393
– Brake lights
– Tail light
– Turn signals
Activation by convenience system central control unit 2 J773
– Rear fog light
– Reversing light
– Side brand (North America)
30
Switch-over of the rear lights
Switch-over when opening the tailgate
When the tailgate is opened, the brake/tail lights and the turn signals are switched over from the rear lights in
the tailgate to the additional rear lights in the bumper. The bulbs in the rear lights in the tailgate are then
switched off. If the tailgate is closed again, the system switches back to the rear lights in the tailgate. The
additional rear lights in the bumper are again deactivated.
Switch-over in case of failure of lamps
In the case of failure of the turn signal on one side
of the vehicle or failure of both lamps for the
combined tail lights/brake lights, the system
switches over asymmetrically to the lights in the
bumper. This means that the system switches over
only to the faulty side of the vehicle. If an
asymmetric switch-over is made, this is indicated in
the dash panel insert. In the case of a switch-over
due to the failure of the main rear lights to the
additional rear lights in the bumper, the next
attempt to switch on the rear lights in the tailgate is
made in conjunction with the next terminal 15 cycle.
364_022
Rear light switch-over sequence
The convenience system central control unit J393 receives sensor information from the convenience system
central control unit 2 J773 for switching over the lights when opening the tailgate. Tailgate closed sender 1
G525 and tailgate closed sender 2 G526 are connected to the convenience system central control unit 2 J773.
If the convenience system central control unit 2 J773 receives the information " tailgate open " , this information
will be relayed to the convenience system central control unit J393 via the convenience CAN bus. The
convenience system central control unit J393 thereupon switches over from the rear light in the tailgate to the
additional rear lights in the bumper. You will find information on senders G525 and G526 in the section on
convenience system central control unit 2 J773 in this self-study programme.
The convenience system central control unit is equipped with a cold and hot lamp monitoring system.
This enables it to detect the failure of the brake/tail lights and turn signals. If the failure of a lamp is detected
on one side of the vehicle, the system, switches over to the additional rear light.
Replacing the lamps
All lamps can be replaced using the vehicle's tool kit. The lamps can be accessed through 4 covers in the
tailgate.
31
Control units
Onboard power supply control unit 2 J520
Modifications to the Audi A6 ‘05
The onboard power supply control unit 2 was
adopted from the Audi A6 ’05. The installation
location of the control unit is new.
Functions
●
Reading in the glove box button E316
●
Activation of the glove box release motor V327
●
Activation of the servotronic solenoid valve N119
●
Provides the information on road speed signal,
convenience opening and convenience locking to
the sliding sunroof via one discrete line
●
Transfers the measured values from the tilt-angle
sensor integrated in the control unit to the CAN
bus
364_023
Variants
There are two variants of the onboard power supply
control unit 2 J520.
The basis variant has the functions of the glove box
release and activates the servotronic solenoid valve.
The Highline variant additionally has the functions
of the sliding sunroof and a tilt sensor in the control
unit. The measured values of the tilt sensor are
required for the anti-theft alarm system.
Installation location
Onboard power supply control unit 2 is, as shown in
the illustration, located below the right-hand front
seat.
364_024
32
Entry and start authorisation control unit J518
●
with aerial reader unit for entry authorisation for keyless entry system J723
●
Entry and start authorisation switch E415 and
●
Entry and start authorisation button E408
Changes to the Audi A6 ‘05
The entry and start authorisation system has basically been adopted from the Audi A6 ‘05. The following
changes have been made compared to the Audi A6 ’05:
The installation location of the aerial reader unit for entry authorisation for keyless entry system J723 was
changed.
In the Audi Q7 it is located at the rear right. The exact installation location is shown in the relevant section.
System overview
Three components of the entry and start
authorisation system communicate with each other
via a local single-wire bus.
These are:
– the entry and start authorisation control unit
J518
– the entry and start authorisation switch E415 and
– the aerial reader unit for entry authorisation for
keyless entry system J723 (is only installed in
combination with Advanced Key)
The entry and start authorisation control unit J518 is
the system master and represents the interface
externally. The entry and start authorisation control
unit J518 is a convenience CAN bus user.
Entry and start
authorisation
control unit
J518
The aerial reader
unit for entry
authorisation for
keyless entry
system
J723
Entry and start
authorisation
switch
E415
364_025
33
Control units
Variants
Depending on the vehicle's target market and the vehicle equipment specification, a variety of demands are
placed on the entry and start authorisation system. The resulting type diversity is covered only by different
variants of the entry and start authorisation switch E415. The switch variant is determined by the following
vehicle characteristics:
●
with or without Advanced Key
●
with automatic or manual gearbox (due to ignition key withdrawal lock)
●
radio frequency of the ignition key (315 MHz, 433 MHz or 868 MHz)
The entry and start authorisation control unit J518 as well as the aerial reader unit for entry authorisation for
keyless entry system J723 are available in one variant only.
Reference
The entry and start authorisation
system is described in SSP 326 Audi A6 ‘05 Electrical System.
34
Tasks of the entry and start authorisation control unit J518
●
Represents the system bus connection externally.
Is a convenience CAN bus user
●
Requests the engine control unit to start the
engine
●
Communicates with the other components of the
entry and start authorisation system via a local
single-wire bus
●
Activates the steering column locking and
unlocking motor
●
●
Reads the position of the ignition key in the entry
and start authorisation switch E415 via 2 discrete
lines and the single-wire bus
Queries the automatic gearbox control unit J217
to determine whether the selector lever is
currently engaged in the P or N position.
●
Enables " vehicle opening "
●
Reads the position of the entry and start
authorisation button E408
(is only installed in combination with Advanced
Key)
●
Is the diagnostic interface for all components of
the entry and start authorisation system
●
Acts as the master for the immobiliser IV vehicle
function
●
Activates the terminal relay for terminal 15 and
for terminal 75x
364_026
The entry and start authorisation control unit and
the steering column form a single unit, as in the
Audi A6 ‘05. The control unit is attached to the
steering column by tear-off screws, and cannot be
replaced separately. If it is necessary to replace the
entry and start authorisation control unit, the
steering column must also be replaced.
35
Control units
Tasks of the entry and start authorisation switch E415
The entry and start authorisation switch E415 is not
mechanically encoded. This switch can, therefore,
be turned with any A6 key. Key recognition is
electronic only.
364_027
●
Evaluating the key position in the ignition switch
with 4 microswitches
●
Reading the signal from the central locking and
anti-theft alarm system aerial R47
●
Transferring the current ignition key position via
single-wire bus and via 2 discrete lines to the
entry and start authorisation control unit
●
Relaying data received from the remote control
key to the entry and start authorisation control
unit
●
For safety reasons, the entry and start
authorisation switch has an additional
disconnect for the power supply to the steering
column lock (to prevent automatic locking)
●
Reading the signal from brake light switch F
(only in vehicles with Advanced Key)
●
Transmitting power via a reader coil to the
inserted ignition key so that it can send its key ID
●
Transmitting the received key ID via the singlewire bus to the entry and start authorisation
control unit J518
●
Communicating with the other components of
the entry and start authorisation system via
a local single-wire bus
●
●
Controlling the integrated ignition key
withdrawal lock
●
36
Reading the gear selector position P switch F305
(only in vehicles with automatic gearbox)
Reading the entry and start authorisation button
E408 (only in vehicles with Advanced Key)
Tasks of the aerial reader unit for entry authorisation for keyless entry system J723
(The aerial reader unit for entry authorisation for
keyless entry system J723 is only available in
combination with the optional Advanced Key)
●
Evaluating the signals from the four proximity
sensors in the doors
●
Activating the aerials for entry and start
authorisation R134 - R138
●
Communicating with the other components of
the entry and start authorisation system via
a local single-wire bus
364_028
Aerial reader unit for entry
authorisation for keyless entry
system J723
Installation location of the aerial reader unit for
entry authorisation for keyless entry system J723
364_029
Tasks of the entry and start authorisation button E408
(The button is only installed in combination with the optional Advanced Key)
●
For security reasons, the current position of the entry and start authorisation button is provided to both the
control unit and to the entry and start authorisation.
Reference
The functions of the entry and start
authorisation switch are described in
SSP 326 - Audi A6 ‘05 Electrical System.
37
Control units
Door control units
J386
J387
J388
J389
Driver door control unit
Front passenger door control unit
Rear left door control unit
Rear right door control unit
Changes to the Audi A6 ´05
The door control units for the Audi Q7 have been
adopted from the Audi A6 ’05. This means that the
control unit and the window lifter motor are again
installed as separate units.
364_030
Substitute master functions
In case of failure of the convenience system central control unit J393, the driver door control unit acts as
a substitute master for the central locking system. In this case, opening by remote control and the Advanced
Key functions are not available. The vehicle must be opened and closed mechanically. In this case, the other
door control units evaluate the information from the driver door control unit directly.
Variants
The door control unit for the Audi Q7 is available in two variants - a Min variant and a Max variant.
The Max variant is required if the vehicle has any of the following functions:
●
Advanced Key
●
Ambient lighting
●
Outside lights
●
Seat memory
●
Exterior mirror fold-back
●
Auto-dimming exterior mirror
●
Electrical child lock
Installation locations of the control unit and
the window lifter motor
Control unit
Window lifter motor
38
364_031
Driver and front passenger seat adjustment control units
J136
J521
Seat and steering column adjustment control unit with memory with memory function
Seat adjustment control unit with memory, front passenger
Changes to Audi A6 05
The seat adjustment control unit and memory has,
apart from a few minor modifications, been adopted
from the Audi A6 ‘05.
The control unit can be installed both as a J136 on
the driver's side and as a J521 on the front
passenger side. The control unit recognises its
installation location automatically based on the
voltage level present at one of its terminal pins.
This method is known as pin encoding.
364_032
Stored settings
The following settings are stored by when the Save button on the driver side memory block is pressed or
when the vehicle is locked with the remote control key:
– Current position of the left and right exterior mirrors
– Current driver seat settings
– Current steering column position (if electrical steering column adjustment is installed)
The following setting is stored when the Save button on the driver side memory block is pressed:
– Current front passenger seat settings
The driver side control unit J136 can store six different settings. Two settings can be stored with the Save
buttons, the other four with different remote control keys.
However, only two different settings can be stored with the Save buttons for the front passenger side control
unit; it is not possible to store any settings with the remote control key.
The basic prerequisite for all memory operations is that the memory block ON/OFF switch is set to " ON " . The
position of this switch is read by software from the driver door control unit J386 and transferred to the CAN
bus. However, the switch position is also transmitted via hardware line through the driver door control unit
and relayed from here to the seat control unit. Here, the hardware line prevents the activation of output
modules for motor activation or disables active output modules.
39
Control units
Functions
Electrical manual adjustment
In the case of seats with electrical adjustment and memory functions, the manual adjustment switches
located in the seat are read by the seat adjustment control unit. The control unit, in turn, drives the
4 adjusting motors and adjusts the seat to the desired position.
In the case of seats with electrical adjustment without memory function, no control unit is used.
The 4 adjusting motors are controlled directly by the manual adjustment switch.
Only terminal 30 is required for adjusting the seats. If a power-down level of the energy management control
unit is set, seat adjustment will not be possible or, if so, only to a limited degree.
Saving settings and adjusting the seats using the programming buttons
The settings described above can be saved by pressing the SET button and then pressing one of the two
memory location buttons. The SET function remains enabled until the red function indicator LED in the button
goes off. An acoustic signal is given as feedback when a setting has been saved successfully. Again, the
prerequisite is that the memory block ON/OFF switch is set to " ON " .
Saved settings can be retrieved as follows:
●
If the driver door is open and " terminal 15 = OFF " , the mirrors, driver seat and steering column or front
passenger seat can be adjusted to the pre-configured positions by pressing briefly one of the two Save
buttons.
●
If the driver door is closed or " terminal 15 = ON " , the Save button must be held pressed until the
adjustment procedure is completed. The adjustment procedure can be interrupted by releasing the Save
button.
Saving settings and memory adjustment using a remote control key
The current mirror, driver seat and steering column positions can be saved to a remote control key as follows:
– The settings are saved after closing the driver door and locking the vehicle with the remote control key.
– After unlocking the vehicle with the remote control key and opening the driver's door, the mirror, driver
seat and steering column are adjusted to the positions saved to the remote control key. The front
passenger seat does not have this function.
However, the function described above will only work properly if two basic requirements are met:
– The menu item " Remote Control Key " must be set to " ON " in the MMI Car Menu under " Systems " , " Seat
Settings " , " Driver Seat " .
– The memory block ON/OFF switch must be set to " ON " .
40
Saving settings and memory adjustment with Advanced Key
The memory adjustment procedure with Advanced Key is identical to the memory adjustment procedure with
the remote control key.
The only difference is that the vehicle is locked and unlocked with the Advanced Key function.
Circuit diagram of the seat memory
Memory operating unit, driver seat E97
Door control unit,
driver side
J386
Driver seat adjustment
operating unit E470
Terminal 31
Emergency
OFF, seat
Backrest
adjustment
motor
Terminal 30
Emergency OFF, seat
Terminal 30g
ON / OFF
Terminal 31
Terminal 31
P1 / P2
SET
LED SET
Terminal 58s
The line for pin encoding
the driver/front passenger control unit
is only available if the passenger control
unit is installed
Seat and steering column adjustment control unit with memory
with memory function
J136
Convenience CAN High
Convenience CAN Low
Seat rake
adjustment
motor
Seat height
adjustment
motor
Seat
longitudinal
adjustment
motor
364_033
Reference
For further information, please refer to
Self-Study Programme SSP 326.
41
Control units
Convenience system central control unit J393
Changes to Audi A6 ‘05
The convenience system central control unit J393 is
based on the control unit in the Audi A6 ‘05.
The following modifications have resulted:
Due to the introduction of a second convenience
system control unit (convenience system central
control unit 2 J773), several functions and outputs
have been omitted from the convenience system
central control unit J393. These are listed in the
following.
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The pins which become available on the control unit
are now used for activating the additional lamps
because turn signals, brake and tail lights are
installed both in the tailgate and in the bumper.
This redundancy was necessary because the lights
in the tailgate are not sufficiently visible to traffic
following on behind when the tailgate is open.
Master functions
–
–
–
–
Turn signal master
Central locking master
Interior lighting master
LIN master for the LIN bus users alarm horn H12 and interior monitoring sensor G273
Variants
The convenience system central control unit J393 comes in 2 variants for the Audi Q7:
a basic variant and a Highline variant.
The Highline variant differs from the basic variant in that it has two additional functions:
– Activation of the rear footwell lights
– Tailgate power latching control
42
Outputs
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Brake and tail lights in bumper, left
Brake and tail lights in bumper, outside left
Brake and tail lights in bumper, inside left
Turn signal in bumper, left
Turn signal in tailgate, left
Brake and tail lights in bumper, right
Brake and tail lights in bumper, outside right
Brake and tail lights in bumper, inside right
Turn signal in bumper, right
Turn signal in tailgate, right
Centre brake light
License plate light
Boot light
Footwell lights, rear left
Footwell lights, rear right
Fuel tank cap release motor
Rear window defroster relay
Supply cables in the power latching motor
Tailgate lock unlocking motor
Wake-up signal for the adaptive suspension control unit J197 (if a vehicle door has been opened)
Wake-up signal for the engine control unit
Bidirectional lines
– High and Low CAN bus lines of the convenience CAN bus
– LIN bus line to alarm horn H12 and interior monitoring sensor G273
Inputs
–
–
–
–
–
–
–
–
Microswitch for power latching system position information
Brake light switch
Softtouch in the tailgate
Glass break detector for anti-theft alarm system (left and right side windows and rear window)
Crash signal from airbag control unit
Flashing light as confirmation of successful programming of the multipurpose garage door opener
" Brake light on " is requested by the ABS control unit J104 due to an ACC braking operation
Tailgate closed microswitch
43
Control units
Inputs and outputs on the convenience system central control unit 2 J773
–
–
–
–
–
–
–
–
Sidemarker, left
Sidemarker, right
Rear fog light, left
Rear fog light, right
Reversing light, left
Reversing light, right
Interior lights
LIN bus line to panorama sunroof
Installation location
The convenience system central control unit J393 is
located at the rear right in the vehicle.
It is installed in an upright position and attached to
a control unit bracket. The convenience system
central control unit 2 J773 is located adjacent the
convenience system central control unit on the left
and is attached to the same bracket.
364_035
44
Convenience system central control unit 2 J773
The convenience system central control unit 2 J773 is a new control unit and will be used for the first time in
the Audi Q7.
Tasks
The convenience system central control unit 2 J773 has the following tasks:
– Evaluating the tailgate closed sender for rear lights switch-over
– Activating the cargo space light or the light for the 3rd seat row
(depending on whether 3 or 5 rear seats are fitted)
– Activating the reversing lights in the bumper
– Activating the rear fog lights in the bumper
– Activating the sidemarkers (North America)
– LIN master for the open sky system
Installation location
The convenience system central control unit 2 J773
is installed in the cargo space on the right below the
load floor.
Variants
Min variant
– Standard equipment
– Solid roof
– 3 rear seats
364_036
Max variant
– Luxury-level equipment
– open sky system
– 5 rear seats (3rd seat row)
Master functions
The convenience system central control unit 2 J773 is the LIN master for the open sky system.
As the LIN master, the control unit is responsible for the functioning and the diagnostics of the open sky
system.
LIN
Convenience system central
control unit 2
J773
Sliding sunroof
control unit
J245
Rear sliding sunroof
control unit
J392
Sunroof roller blind
control unit
J394
364_058
45
Control units
Function diagram
Terminal 30
Terminal 30
Reversing light, left
Rear fog light, left
Terminal 31
J773
Reversing light, right
Rear fog light, right
Interior light
Cargo space light / interior light for 3rd seat row
LIN open sky system
Convenience CAN High
Convenience CAN Low
Sidemarker, right (North America)
Sidemarker, left (North America)
G525 Tailgate closed sender 1
G526 Tailgate closed sender 2
364_037
Evaluating the tailgate closed sender
The two switches G525 tailgate closed sender 1 and G526 tailgate closed sender 2 are read by the convenience
system central control unit 2 J773.
The control unit provides the position of the two switches on the convenience CAN bus.
The convenience system central control unit J393 reads the switch information from the convenience CAN bus
and activates the rear lights accordingly.
Position of the switches G525 and G526 " tailgate closed " :
– The convenience system central control unit J393 activates the brake/tail lights and the turn signals in the
main rear lights in the tailgate.
– The brake/tail lights and turn signals in the additional rear lights in the bumper are not activated.
Tailgate
TS
BT
BT
Convenience CAN bus
Position of switches G525 and G526 " tailgate open " :
– The convenience system central control unit J393 activates the brake/tail lights and the turn signals in the
bumper.
– The brake/tail lights and the turn signals in the tailgate are not activated.
G525
J393
G526
J773
Legend
TS
BT
RL
RF
Turn signal
Brake/tail light
Reversing light
Rear fog light
TS
BT
RL
RF
Bumper
364_060
46
Emergency function
In the event of a fault in switches G525 and G526,
the system switches over from the main rear lights
in the tailgate to the additional rear lights in the
bumper. This action is not indicated in the dash
panel insert.
In this case, a new attempt to switch on the main
rear lights in the tailgate is not made until the next
ignition OFF/ON cycle.
Switch operating flap
Fault memory entries
The number of fault memory entries for the lights
has been reduced. Only one fault memory entry is
made per light assembly. Thus, only four fault
memory entries are
needed to cover the complete rear lighting.
From the environmental data of the corresponding
fault memory entry it can be determined which
lamp in a light assembly is faulty.
364_038
Data blocks
The convenience system central control unit 2 J773
provides data blocks for the following functions:
– Onboard power supply
– Additional rear lights in the bumpers
– Interior light
– open sky system
– LIN communication
– Tailgate recognition
Switch operating flap
G525
G526
364_039
Final control test
The convenience system central control unit 2 J773 provides final control tests for the following functions:
– Additional rear lights
– Sidemarkers
– Interior lighting
– open sky system
Encoding
The convenience system central control unit 2 J773 provides codings for the following functions:
– Vehicle type
– open sky system
– Interior light
– Country
– Convenience opening of open sky roof
– Convenience opening of roll-up sun screen
– Convenience closing of roll-up sun screen
47
Control units
open sky system
Design
The open sky system is a 3-section panoramic glass sunroof. It extends back to the 3rd seat row.
The front glass section tilts up and opens electrically. The rear glass section opens electrically. The panoramic
sunroof has a full-area sunshade system. The sunshade operates electrically for the front two glass sections
and manually and for the rear glass section.
Glass section 3, rear
Glass section 2, centre
Glass section 1, front
364_041
Functions
●
Glass section 1, front: open and tilt up
●
Glass section 2, centre: fixed
●
Glass section 3, rear: tilt up
Direction of travel
Front roll-up sun screen
electrically operated
48
Rear roll-up sun screen
manually operated
364_042
Glass sunroofs 1 and 3 tilted up
364_043
Glass sunroof 1 slid open and glass sunroof 3 tilted up
364_044
49
Control units
Sunblind
The three glass sections have sunshades for protection against direct sunlight. The front sunshades for glass
sections 1 and 2 are operated electrically. The rear sunshade for glass section 3 can be operated manually.
J394
Sunroof roller blind control unit
with V260 sunroof roller blind motor
J392
Rear sliding sunroof control unit
with V146 rear sliding sunroof motor
Rear sunshade
Front sunshade
Direction of travel
364_045
J245
Sliding sunroof control unit
with V1 sliding sunroof motor
E467
Rear overhead module
operating unit
Operation
E584
Sunroof roller sun blind
button 1
E583
Tilt sunroof button 2
E585
Sunroof roller sun blind
button 2
J528
Roof electronics control unit
E582
Tilt sunroof button 1
364_046
50
Glass section 1 can be operated using the rotary switch for the sliding sunroof in the front overhead module.
Glass section 3 can be operated using the tilt sunroof button 1 E582 in the front overhead module and tilt
sunroof button 2 E583 in the rear overhead module operating unit E467. Automatic opening/closing mode is
activated by briefly pressing the button. Manual opening/closing mode is activated by holding the button
down.
The front roof section can be tilted up by pressing the rotary switch. To be able to do this, the rotary switch
must be in the 0 position. To close the tilted-open roof section, the rotary switch must be pulled down.
The front roll-up sun screen can be operated with sunroof roller sun blind button 1 E584 and sunroof roller
sun blind button 2 E585. Briefly pressing the button activates automatic opening/closing mode and holding
the button down activates the manual opening/closing mode.
Tilt sunroof button 2 E583 and the sunroof roller sun blind button 2 E585, which are located in the rear
overhead module operating unit E582, can be deactivated using the child lock. For further operating
instructions, please refer to the Audi Q7 Owner's Manual.
Function diagram
LIN
Convenience system central
control unit 2
J773
Sliding sunroof
control unit
J245
Rear sliding sunroof
control unit
J392
Roof electronics
control unit
(with control switches)
J528
Sunroof roller blind
control unit
J394
Rear overhead module
operating unit
E467
364_055
51
Control units
Initialisation
The initialisation for the open sky system's motors will be lost if the power supply to the motors or control
units is disconnected when the convenience CAN bus is awake. For instance, the initialisation for motor V1
will be lost if the convenience CAN bus is not in Sleep mode and the power supply to this motor is
disconnected.
Information on handling a lost initialisation
J245 Sliding sunroof control unit with V1 sliding sunroof motor:
– Roof section 1 can no longer be moved in the " OPEN " direction with the rotary switch. Manual closing can
only be initiated by pulling the button down. A teach-in cycle is performed directly after the manual closing
cycle.
J392 Rear sliding sunroof control unit with V146 rear sliding sunroof motor:
– The red LED in the tilt sunroof button 1 E582 is lit continuously at " term. 15 ON " . Only a manual closing
cycle can be performed with the " CLOSE " button. A teach-in cycle is started directly after the manual
closing cycle.
J394 Sunroof roller blind control unit with V260 sunroof roller blind motor:
– The sunroof roller blind cannot be moved in the " OPEN " direction. Only a manual closing cycle can be
performed with the " CLOSE " button. A teach-in cycle is performed directly after the manual closing cycle.
Performing the initialisation and teach-in cycle
Info
The drive motors initialise themselves in the sliding sunroof or roller sun blind " closed " position. The teach-in
cycle is performed automatically directly after the initialisation is completed. During the teach-in cycle the
drive motors are adapted to the vehicle-specific mechanism, and the set-up is saved. During the teach-in
cycle, the switch must not be released since the teach-in cycle will otherwise become invalid and the drive
motor will again become reset to default.
Note
The anti-pinch protection feature is not active during the teach-in cycle.
Procedure in case of drive motors which have been reset to default
Hold the switch for the relevant motor, e.g. tilt sunroof button 1 E582 for V146, rear sliding sunroof motor,
manually in the " Close " position until the roof section - in this case it is roof section 3 - closes completely,
reopens completely and closes again.
If the roof section or the roller sun blind is already closed at the start of the initialisation, the relevant motor
opens the roof slightly and recloses it again completely.
During the teach-in cycle for cover 1 and during roller sun blind operation, the roof opens 200 mm and closes
again completely.
If the control switch is released during an initialisation procedure, the initialisation will not be accepted.
If the " close " button is pressed for longer than 10 sec. while the roof or roller sun blind is closed, the
respective drive motor will be reset to default and the teach-in cycle will start immediately.
Procedure in case of standardised drive motors
The teach-in cycle can only be initiated in the " closed " position.
If the " close " button is pressed for longer than 10 sec. while the roof or roller sun blind is closed, the
respective drive motor will be reset to default and the teach-in cycle will start immediately.
52
Deactivation of control switches
If a switch is pressed for longer than 60 seconds, it will be deactivated in the direction it is set. If the switch is
pressed for longer than 60 seconds in " OPEN " direction, the " OPEN " function will be deactivated.
The deactivation can be cancelled by means of an ignition OFF/ON cycle.
Anti-pinch protection feature
All 3 motors have an anti-pinch protection feature which is enabled over the full closing distance of the
window.
Emergency closing
If the anti-pinch protection feature for a motor is activated, the corresponding roof section or roller sun blind
can be closed using an emergency function. To be able to do this, the relevant switch must be pressed
manually and held down within 5 seconds after the reversing cycle starts. The corresponding roof section or
roller sun blind will then close manually without the anti-pinch protection feature.
53
Control units
Trailer detector control unit J345
In addition to activating the trailer lights, the trailer detector control unit J345 controls the electric swivelling
tow attachment.
The electric swivelling tow attachment known from group vehicles can also be retrofitted. In this case, it is
installed as a unit behind the bumper.
Installation location
The trailer detector control unit J345 is installed in
the cargo space on the right under the load floor.
364_049
Tasks
–
–
–
–
–
Controlling the electric swivelling tow attachment
Monitoring the " clutch engaged " position
Coupled trailer detection
Activating the trailer's rear lights
Switching " Terminal 30 trailer " OFF when a power-down is activated by the energy management
control unit J644.
Electric swivelling tow attachment
The electric swivelling tow attachment consists of an electro-mechanical swivel unit, which swivels the tow
attachment ball head together with the trailer socket U10. The tow attachment ball head is first swivelled
down together with the socket, and then swivelled back into its end position.
The electric swivelling tow attachment is actuated by means of a rocker in the luggage compartment on the
right.
The trailer detector control unit J345 is responsible for activation, status indication and diagnostics.
The electric swivelling tow attachment is installed as a unit behind the bumper cover.
364_050
54
Variants
The following tow attachments are available for the
Audi Q7:
●
Mechanical tow attachment,
removable tow attachment ball head
●
Electric tow attachment,
electric swivelling tow attachment ball head
Operation
The electric swivelling tow attachment can be
swivelled out manually or automatically.
The operating unit consists of a rocker in the right
side trim in the luggage compartment. The rocker
has a red locating light and a yellow function light.
For further operating instructions, please refer to
the Audi Q7 Owner's Manual.
The swivelling tow attachment ball head can only be
extended or retracted under the following
conditions:
– Vehicle must be stationary
– Tailgate must be open
– No trailer attached
364_051
55
Control units
Mode of operation
The swivel-out operation is executed by the hinged tow attachment ball head motor V317 and monitored by
the trailer detector control unit J345. If the tow attachment comes collides with an obstacle while swivelling
out, the swivel-out operation is stopped. To detect collisions, the control unit monitors the power
consumption of the hinged tow attachment ball head motor V317. The swivel-out operation can be continued
by pressing the button continuously.
58s
31
Switch information - extending
30
Switch information - retracting
K212 LED retracting
31
K211 LED extending
E474
V317 Positive
V317 Earth
V317
G471 Signal
G471 Positive
G471 Earth
G473
J345
364_052
Legend
E474
G473
J345
K211
K212
L76
V317
56
Electric hinged tow attachment coupling button
Trailer coupling motor Hall sender
Trailer detection control unit
Extending tow ball coupling warning lamp
Retracting tow ball coupling warning lamp
Button illumination (via 58s)
Hinged tow attachment ball head motor
" ON " conditions
The swivelling tow attachment ball head can only be extended or retracted under the following conditions:
– Vehicle must be stationary
– Tailgate must be open
– Button E474 must be operated
– No trailer attached
" OFF " conditions
The swivelling movement may be stopped under the following conditions:
– Anti-pinch protection
– By altering the supply voltage, i.e. if the supply voltage is less than 9 V or more than 15 V, the swivel-out
operation will be stopped
– By changing an " ON " condition
– Attaching a trailer
– Vehicle road speed greater than 6 kph
Initialisation
The electric swivelling tow attachment must be initialised after the following conditions occur:
– Fault memory entry " mechanical fault " , " implausible signal " or " electrical fault in electrical circuit "
– After a terminal 30 Reset (e.g. disconnecting the battery) if the tow attachment was not in its end position
– After replacing the electric swivelling tow attachment
– After replacing the trailer detector control unit J345
During the initialisation procedure, the system " learns " the two limit stops or the swivel distance.
The electric swivelling tow attachment ball head must complete a single swivel cycle in at least one direction
without interruption. The initialisation is complete at the most recent after a full swivel-in/swivel-out cycle has
been completed.
To initialise the system, the control button for the relevant direction of movement must be pressed until the
tow attachment ball head reaches the limit stop.
Alternatively, the initialisation can be performed with the diagnostic tester using the Final Control Diagnosis
function.
An initialisation is only possible under the following conditions:
– The trailer detector control unit J345 has not detected an attached trailer
– Vehicle road speed less than 6 kph
– Supply voltage between 9 and 15 V
– Tailgate open
57
Tailgate control unit J605 and
tailgate control unit 2 J756
364_053
Changes to Audi A6 ‘05
The tailgate control units and drives J605 and J756 have been adopted from the Audi A6 Avant.
The software was adapted to the Audi Q7 tailgate, which, for example, has a different opening angle than
the Audi A6 Avant tailgate. The tailgate control operating concept is identical to that described in SSP 344.
The tailgate control system
The tailgate control unit J605 communicates with tailgate control unit 2 J756 via a single-wire bus
manufactured by systems supplier Valeo.
The tailgate control unit J605 is a convenience CAN bus user and can be addressed under the address word
6D with the diagnostic tester. The tailgate control unit 2 J756 cannot be addressed separately with the
diagnostic tester; it transmits its diagnostic information to the tailgate control unit J605.
The tailgate drives and the tailgate control unit form a unit. They have a single part number. The tailgate
control unit J605 is always installed on the left-hand side and is the master control unit, while tailgate control
unit 2 J756 is located on the right-hand side and acts as the slave control unit.
Installation locations of the tailgate drives
Reference
For further information, please refer to
Self-Study Programme SSP 344.
364_054
58
Self-Study Programmes on the Audi Q7
The Audi Q7 stands for 100% premium-quality electronics!
SSP 287 - Audi A8 ‘03 Electrical Components
There has been an enormous increase of the number of electronic control units over the past few years.
The majority of innovations made are only possible thanks to increasingly sophisticated electronics. Without
this development, many of the in-car comfort features which today are taken for granted would not be viable.
To keep pace with the increasing complexity of new vehicles, continuous learning is essential. The Self-Study
Programmes by AUDI are an efficient advanced learning tool as they enable you keep abreast of technical
developments.
– Bus Topology
– Control units
Order number: 000.2811.07.20
SSP 288 - Audi A8 ‘03 Distributed Functions
– Bus Topology
– Distributed Functions
To be able to offer customers with this diversity of
functions and equipment options, a multiplicity of
different electronic control units are required in the
Audi Q7. The control units do not work separately as
independent nodes, rather they are interconnected
via efficient bus systems. Depending on the
quantity of data to be exchanged, the MOST bus, an
optical data bus, a CAN bus or a LIN bus is utilised.
Data is also exchanged across the various bus
systems. A separate control unit provides the
interface between the various systems. Each control
unit is therefore supplied efficiently with the
information and vehicle operating variables which
its requires for optimal functioning.
Order number: 000.2811.08.20
SSP 344 - The New Audi A6 Avant ‘05
364_006
–
–
–
–
–
–
–
Body
Occupant Protection
Engine
Running Gear
Electrical System
Infotainment
Convenience Electronics
Order number: A05.5S00.13.20
SSP 326 Audi A6 ´05 Electrical System
–
–
–
–
Networking
Bus Topologies
Convenience Electronics
Infotainment
Order number: A04.5S00.09.20
Self-Study Programme 364 introduces you to the
network topology of the Audi Q7, and provides you
with an overview of the positions in the vehicle in
which electrical components are located. In addition
to obtaining service-related information on the
control units, you will learn the installation location
of each control unit and become familiar with its
tasks. You quickly and efficiently gain an insight into
the electronics in the Audi Q7.
SSP 375 Audi Q7 - New Driver Assist Systems
– Lane Change Assist (LCA)
– Optical Parking System (OPS)
– Rear-View Camera
Order number: A05.5S00.21.20
364_029
Into the lead: With design & performance
364
Vorsprung durch Technik www.audi.de
Service Training
Audi Q7 - Electrical System
Self-Study Programme 364
All rights reserved.
Technical specifications
subject to change without
notice.
Copyright
AUDI AG
I/VK-35
Service.training@audi.de
Fax +49-841/89-36367
AUDI AG
D-85045 Ingolstadt
Technical status: 10/05
Printed in Germany
A05.5S00.17.20