steering wheel adjustment AUDI A6 2005 C5 / 2.G Electrics System Training Manual

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Overview
1 Auxiliary heating control unit J364
2 Control unit for ABS with EDL J104
3 Control unit for distance control J428
4 Transmitter unit in wheel well for tyre pressure
monitoring, front left G431
5 Control unit for on-board power supply J519
6 Door control unit, driver's side J386
7 Control unit for access and
start authorisation J518
8 Control unit in dash panel insert J285
9 Control unit for steering column electronics J527
10 Control unit for telephone, telematics J526
Telephone transmitter and receiver R36
11 Engine control unit J623
12 Climatronic control unit J25513 Control unit for seat adjustment with steering-
column adjustment memory J136
14 Level control unit J197
Control unit for headlight range control J431
Control unit for tyre pressure monitoring J502
Control unit 2 for onboard power supply J520
Control unit for display and operating unit for
front information J523
Data bus diagnosis interface J533
Antenna read-in unit for keyless access
authorisation J723
15 CD changer R41
CD ROM drive R92
16 Door control unit, rear left J388
17 Airbag control unit J234
Control unit installation positions

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Bus topology
Overview
NOX sensor
J583
Rotation rate sensor
G202
Seat occupied
recognition
J706
Power module
for left headlight
J667
Power m odule for
right headlight
J668
Level control
J197 Electric parking
and hand brake
J540 Headlight range
control
J431 Automatic
transmission
J217 Airbag
J234 ABS with EDL
J104 Engine electronics 1
J623 Diagnosis connection
T16Control unit in dash
panel insert
J285Distance control
J428
Data bus diagnosis
for data bus
J533
Door control unit,
driver’s side
J386
Door control unit,
passenger’s side
J387
Door control unit,
rear left
J388
Door control unit,
rear right
J389
Seat adjustment
with memory
Steering column
adjustment
J136
Seat adjustment
with memory,
passenger’s side
J521
Trailer detection
J345
Steering column
electronics
J527
Multi-function
steering wheel
J453 Steering-angle
sensor
G85Power management
J644
Auxiliary heating
J364
Parking aid
J446
On-board power
supply 2
J520
Access and
start authorisation
J518
On-board power
supply
J519
Centr. contr. unit for
convenience system
J393
Climatronic
J255
Tyre pressure
monitoring
J502

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Internal structure
The pivot angle is monitored by an inductive pickup
in the pivot module. The pickup value is evaluated
immediately in the relevant power module for
headlights as a pulse width-modulated signal.
If the motor or pickup does not function, the power
module sends an error message to the control unit
for headlight range control J431.
This is communicated to the driver in a display in
dash panel insert J285.
The same lamps that are used in the bi-xenon
headlight are also used in the adaptive light
headlight.
CAN Communication
The values marked with (*) are used as input
variables in calculating the pivot angle.
All other input variables are only needed for
dynamic headlight range control.
326_079 Data bus diagnosis
interface J533 Co n t ro l u n it fo r h e a d li g h t ra n g e c o n t ro l
J431
Steering-angle sensor G85
Steering wheel angle*
Steering wheel angle speed*
Control unit for ABS with EDL J104
Wheel speeds*
Directions of travel*
Brake light switch signal
Yawing speed*
Brake pressureControl unit for on-board power supply
J519
Dipped beam on*
Control unit for access and
start authorisation J518
Te r m i n a l X
Te r m i n a l 5 0
Gas discharge light L13/L14
326_135
Control motor for dynamic
cornering light V318/V319
Magnet for headlight cover adjustment
N395/N396Sensor for pivot module
position G474/G475

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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