lock AUDI A6 2005 C5 / 2.G Electrics System Training Manual

Downloaded from www.Manualslib.com manuals search engine 26
Opening the vehicle
Convenience electrics
326_055 Antenna for
central locking and
anti-theft warning
system
R47
Antenna on driver’s
side for access
start authorisation
R134Antenna on
passenger’s side for
access start
authorisation
R135Passeng er
compartment
antenna 1 for start
authorisation
R138
Boot antenna for
access
start authorisation
R137
Switch for
access and start
authorisation
E415
Antenna read-in
unit for keyless access
authorisation
J723 Control unit for
access and
start authorisation
J518
Door control unit,
driver’s side
J386
Central control unit
for
convenience system
J393Sensor for
outer door
handle contact,
driver’s side
G415

Downloaded from www.Manualslib.com manuals search engine 27
1 The driver puts his/her hand into the finger well
of the door handle. The sensor for outer door
handle contact G415 sends the information
"Finger in finger well" to the antenna read-in unit
for keyless access authorisation J723.
2 The antenna read-in unit sends an alarm signal
to the vehicle key via the antenna for access and
start authorisation R134.
3 The antenna read-in unit sends a signal to the
vehicle key via all the antennae for access and
start authorisation.
4 Based on the signals, the vehicle key determines
the position on the vehicle and sends
information to the antenna for central locking
and anti-theft warning system R47.
5 The antenna for central locking and anti-theft
warning system receives the information.
The information is forwarded by the switch for
access and start authorisation E415 to the
control unit for access and start
authorisation J518, where it is evaluated.6 The control unit for access and start
authorisation sends the information "Opening
vehicle" on to the central control unit for the
convenience system J393 and to the door control
unit, whose door handle initiated the key query.
7 The door control unit, which received the
instruction from the control unit for access and
start authorisation, activates the lock unit, which
unlocks the door.
8 The central control unit for the convenience
system J393 sends the information "Opening
vehicle – Advanced Key" to CAN Convenience.
9 The normal unlocking process takes place.
This involves disarming, unlocking,
acknowledgement flashing and switching on of
the interior light. In addition to
acknowledgement flashing, the control unit for
access and start authorisation also sends the
lock status to the vehicle key via the switch for
access and start authorisation and the antenna
for central locking and anti-theft warning
system R47.

Downloaded from www.Manualslib.com manuals search engine 28
Starting the vehicle using the button
Convenience electrics
326_056 Antenna for
central locking and
anti-theft warning
system
R47
Antenna on driver’s
side for access
start authorisation
R134Antenna on
passenger’s side for
access start
authorisation
R135Passenger
compartment
antenna 1 for access
and start
authorisation
R138
Boot antenna for
access
start authorisation
R137
Switch for access
and start
authorisation
E415
Antenna read-in
unit for keyless access
authorisation
J723 Control unit for access
and start authorisation
J518
Data bus diagnosis
for data bus
J533Engine control unit
J623 Button for access
and start
authorisation
J408

Downloaded from www.Manualslib.com manuals search engine 29
1 The driver presses the button for access and
start authorisation E408 down fully. The button
sends the information about "Ignition on" and
"Engine start" both to the switch for access and
start authorisation E415 and to the control unit
for access and start authorisation J518.
2 The switch for access and start authorisation
passes the information from the button on to the
control unit for access and start authorisation via
the data lead. The two button information
messages are compared there.
3 The control unit J518 sends a key query to the
antenna read-in unit for keyless access
authorisation J723.
The antenna read-in unit sends a signal to the
vehicle key via all the antennae for access and
start authorisation.
4 Based on the signals, the vehicle key determines
the position in the vehicle and sends its
information to the antenna for central locking
and anti-theft warning system R47.
5 The antenna for central locking and anti-theft
warning system receives the information.
The switch for access and start authorisation
E415 passes the information on to the control
unit for access and start authorisation, which
then evaluates it. 6 Based on the key evaluation, the S contact is
sent to CAN Convenience and the steering is
unlocked.
7 As soon as the steering is fully unlocked,
terminal 15 is switched on.
8 Once terminal 15 has been switched on, data is
exchanged between the engine control unit and
the control unit for access and start
authorisation via the CAN bus. The immobiliser is
then deactivated.
9 The control unit for access and start
authorisation sends the "Start request" signal to
the engine control unit. The engine control unit
checks whether the clutch is depressed or
whether P or N is selected in the case of an
automatic gearbox and then performs the fully
automatic engine start.

Downloaded from www.Manualslib.com manuals search engine 31
New identity
As is already the case with the Audi A8 ‘03 , if a
control unit is stolen, it is no longer necessary
(for safety reasons) to also replace the remaining
control units, which are integrated in the
immobiliser.
In this case, the "New Identity" function must be
used for the control unit for access and start
authorisation and the engine control unit.
It is only a matter of installing a new lock set before
using the "New Identity" function.
The switch for access and start authorisation E415
reads in the key code in electronic form only.
The hinged bit coding is not evaluated signal.
The ignition switch is not par t of the lock set for this
reason.
Component protection
As is already the case with the Audi A8 ’03, the
Convenience and Infotainment control units are also
integrated within the "Component protection" safety
system.
As a result, these control units must be adapted to
the specific vehicle once they have been installed.
The data bus diagnosis interface is integrated into
the "Component protection" function for the first
time. Since component protection works via a
number of control units, the Startup menu in
"Guided fault-finding" is not assigned to any one
control unit and can be found directly under the
self-diagnosis systems.
326_122 326_075
Audi
Audi A6 2005>
2005 (5)
Saloon
BBJ 3.0l Motronic / 160 kW Guided fault-finding
Function test
Teaching driving authorisation
systems
Te s t i n g q u e r y
The following options are available:
1. Adapt the driving authorisation system to suit
the existing immobiliser
2. Assign a new identity to the immobiliser and
re-teach the components
3. Terminate the function test
326_074
Audi
Audi A6 2005>
2005 (5)
Saloon
BBJ 3.0l Motronic / 160 kW Guided fault-finding
Function/component selection
Selecting a function or component
Body (Rep. Gr. 01; 50 - 97)
Electrical system (Rep. Gr. 01; 27, 90 - 97)
Component protection functions
13 – Distance control, Component protection
05 – Access and start authorisation, Component protection
15 – Airbag, Component protection
06 – Seat adjust. with memory, front pass. side, Comp. protection
36 – Seat adjust. with memory, front driver’s side, Comp. protect.
46 – Central module for convenience system, Comp. protection
66 – Seat adjustment with memory, rear, Component protection
07 – Display/operator unit, front, Component protection
17 – Dash panel insert, Component protection
27 – Display/operating unit, rear, Component protection
Switch for access and start authorisation E415

Downloaded from www.Manualslib.com manuals search engine 34
Adaptive light
The adaptive light works as a dynamic corner-
sensitive headlight. With the dynamic cornering
headlight, the headlight projection module is
pivoted horizontally by an integrated motor.
The headlight lenses and the bracket do not turn.
The pivot angle is approx. 15° on the inner curve
side and 7.5° on the outer curve side.
The various pivot angles have advantages in that
they provide better lighting for corner routes.
In this case, the inner-curve module pivots in twice
as much as the outer-curve module.
This achieves the maximum possible illumination
width with homogeneous light distribution.
No pivoting when vehicle is stationary
The projection modules are not pivoted at driving
speeds of < 6 km/h.
The pivot angle essentially depends on the steering
wheel angle at speeds of more than 10 km/h.
This complies with the legal requirement that the
headlights must not be pivoted when the vehicle is
stationary. At the same time, a slight transition to
headlight pivoting occurs during acceleration from
idle when the steering lock remains constant.
Convenience electrics
326_077
Pivot range
326_076

Downloaded from www.Manualslib.com manuals search engine 36
Signal and data exchange
The same sensors that are used for dynamic
headlight range control for bi-xenon headlights are
also used as level sensors. They send a pulse
width-modulated signal to the control unit for
headlight range control. Data is exchanged between
t h e c o n t ro l u n i t fo r h e ad l i gh t ra n g e c o n tro l J 4 3 1 an d
the power modules in the headlight on the left J667
and right J668 via a 500-kBaud CAN.
Show Room function
The Show Room function can be used to pivot the
headlights by moving the steering wheel – even
when the vehicle is stationary – for presentation.
The function can be adapted using the diagnosis
tester in the control unit for headlight beam
adjustment.
If the vehicle is then driven at more than 30 km/h,
the function is permanently disabled. The function
can be switched on again at any time using the
diagnosis tester.
Convenience electrics
326_074
Audi
Audi A6 2005>
2005 (5)
Saloon
BBJ 3.0l Motronic / 160 kW Guided fault-finding
Function/component selection
Selecting a function or component
Body (Rep. Gr. 01; 50 - 97)
Electrical system (Rep. Gr. 01; 27, 90 - 97)
01 – Self-diagnosis systems
55 – Dynamic headlight range control
J431 – Dynamic headlight range control, Functions
J431 – Contr. unit, head. range control (HRC), General system descr.
J431 – Control unit for headlight range control (HRC), Adaptation
J431 – Contr. unit, head. range control (HRC), Adapt. – Show Room
J431 – Control unit for headlight range control (HRC), Coding
J431 – Control unit for headlight range control (HRC), Replacing
J431 – Control unit for headlight range control (HRC), Basic setting
J431 – Contr. unit, head. range contr. (HRC), Read. meas.-val. blocks
J431 - Contr. unit, head. range control (HRC), selective actuator test
J431 – Contr. unit, head. range contr. (HRC), sequential actuator test
326_085

Downloaded from www.Manualslib.com manuals search engine 41
Function diagram
Legend
E493 Operating button for dash panel insert
F1 Oil pressure switch
F34 Warning contact for brake fluid level
E66 Switch for low coolant display
F77 Warning contact for windscreen washer level
G Sender for fuel level indicator
G6 Pre-feed fuel pump
G17 Temperature sensor for outside temperature
G34 Sensor for brake pad wear, front left
G35 Sensor for brake pad wear, front right
G169 Fuel level sensor 2*
G266 Oil level and oil temperature sensor
J17 Fuel pump relay
J285 Control unit in dash panel insert
J489 Receiver for radio clock
J533 Data bus diagnosis interface
J540 Control unit for electric parking and
hand brake
* only for vehicles with quattro drive
326_037
Additional signal
1 Terminal 58d
2 Terminal 58s

Downloaded from www.Manualslib.com manuals search engine 54
The tilt sensor for the anti-theft warning system is
integrated directly in control unit 2 for on-board
power supply J520 in the new Audi A6 ‘05.
The fluid-filled sensor registers changes in the
vehicle tilt both transversely and longitudinally,
thereby preventing incorrect triggering as a result of
shaking through viscous fluid and electronic delay.
The current tilt values can be read out using
measured-value blocks.
Diagnosis
– Measured-value blocks
Measured-value blocks are available for the
following functions:
– Servotronic
– Sliding roof
– Tilt angle
–Actuator test
Checks can be carried out for the following
functions, depending on the version:
– Glove compartment release
– Servotronic valve
– Sliding roof activation (can be measured
using a multimeter on the on-board power
supply control unit, sliding roof does not
open, however, if it is not released by the
central control unit for the convenience
system)
–Coding
The High-Line version of control unit 2 for
on-board power supply J520 must be coded for
the following functions:
– Tilt sensor (with or without)
– Sliding roof (with or without)
Convenience electrics
Note
The tilt sensor function can be switched off
using a button in the driver’s door panel.
Reference
For further information on the tilt sensor
function, please refer to the SSP 254,
Audi A4 ‘01 – Technology.
Tilt sensor for anti-theft warning system

Downloaded from www.Manualslib.com manuals search engine 55
The central control unit for the convenience
system J393, with which you may be familiar from
the Audi A8 '03, is used in the Audi A6 ’05. The tasks
and functions have been adapted according to
requirements.
The control unit is a participant on the
CAN Convenience data bus.
Master functions
The master functions of the central control unit for
the convenience system are as follows:
– Direction indicator master
– Central locking master
– Interior lighting master
– LIN master for alarm horn H12 and sensor for
passenger compartment monitoring G273
Other functionalities
In addition to the master functions, other functions
are also available in the central control unit for the
convenience system. The power outputs integrated
in the control unit activate the following loads:
– Back lights
–Rear sun blind
– Rear window heating
– Rear footwell lights
–Boot light
– Tailgate/boot lid release
Ve rs i on s
Two versions of the central control unit for the
convenience system are available:
–Basic
– High-Line (with rear sun blind/anti-theft warning
system/light package for ambient lighting/area
lighting)
Central control unit for convenience system J393
326_113