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

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N395 Magnet for cover adjustment,
left headlight
N396 Magnet for cover adjustment,
right headlight
V5 Windscreen washer pump
V48 Left control motor for headlight range control
V49 Right control motor for headlight range
control
V123 Motor for vertical steering column
adjustment
V124 Motor for axial steering column adjustment
V318 Control motor for dynamic cornering light,
left
V319 Control motor for dynamic cornering light,
right
W9 Footwell light, left
W10 Footwell light, rightAdditional signals
1Terminal 58
2 Terminal 58s
3CAN Drive High
4CAN Drive Low
5CAN Convenience High
6CAN Convenience Low
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System overview
Convenience electrics
– Hall sender 1 for vertical adjustment of the
steering column
– Hall sender 2 for axial adjustment of the
steering column
– Bonnet switch for anti-theft warning system–Rotary light switch
–Hazard warning button
– Switch for reversing light (manual transmission)
– Sensor for rain and light detection (via LIN bus)
– Front direction indicator lights, left and right
– Side direction indicator lights, left and right
– Front parking light, left and right
– Dipped beam headlight, left and right
– High beam headlight, left and right
– Fog lights, left and right
– Relay for headlight cleaning system
– Windscreen washer pump
– Control unit for wiper motor (via LIN bus)– Supply, terminal 58
– Front footwell lights, left and right
– Relay for dual-pitch horn
– Steering column adjustment (vertical/axial)
– Selector lever lighting
– Indicator light for hazard warning lights
– Magnets for cover adjustment
Headlights (left and right)
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The control unit for on-board power supply J519 evaluates the following input signals:
The control unit for on-board power supply J519 controls the following loads:

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Diagnosis
Basic settings
After the control unit for on-board power
supply J519 or the steering column or the switch for
steering column adjustment E167 is replaced, a
basic setting in axial and vertical position must be
implemented for the steering column.
Actuator test
An actuator test can be used to carry out the
following checks:
– Indicator light for hazard warning lights K6
– Lamp for parking light, left M1
– Lamp for parking light, right M3
– Lamp for dipped beam headlight, left M29
– Lamp for dipped beam headlight, right M31
– Lamp for high beam headlight, left M30
– Lamp for high beam headlight, right M32
– Lamp for left fog light L22
– Lamp for right fog light L23
– Lamp for daytime driving light, left L174
– Lamp for daytime driving light, right L175
– Direction indicator lights, left
– Direction indicator lights, right
– Footwell light, left W9
– Footwell light, right W10
– Wiper, top turning position
– Wiper, bottom turning position
– Windscreen washer pump V5
– Relay for dual-pitch horn
–Terminal 58
Coding
The control unit for on-board power supply J519 can
be coded for the functions
–Daytime driving light,
– Driving light assistant,
– Headlight type,
– Footwell lighting and
–Country versions
using the diagnosis tester.
Note
The actuator test can be performed either
sequentially (in sequence) or selectively
(individual selection).

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A combined sensor for rain and light detection is
used for the first time in the Audi A6 ’05.
The sensor includes a light-control assistant
function, which relieves the driver of the job of
having to switch the driving light on manually, as
well as a wiper control function, which depends on
the amount of moisture on the front windscreen.
The development goal here was to integrate these
functions in a compact housing.
The sensor is connected as a LIN slave to the control
unit for on-board power supply J519.
Installation position
The sensor for rain and light detection is located on
the windscreen in the attachment base of the
interior mirror.
Tasks of the light sensor
– Switch the driving light on and off automatically
– Activate the Coming Home/Leaving Home
function
– Day/night detection for rain sensor
Switch-on conditions
The light sensor supplies the control unit for
on-board power supply with information for
switching on the driving light in the following
situations:
–Dawn/dusk
–Darkness
– Entering/travelling through tunnels
– Travelling through forests
Convenience electrics
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Note
Allowances are made for disruptive influences,
such as external light, dirt, vibrations or smears
caused by wiper blades.
LIN Terminal 30
Te r m i n a l 3 1
Sensor for rain and light detection G397
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Function of the light sensor
In order to detect certain ambient conditions, such
as tree-lined avenues or routes through tunnels, the
light sensor registers the light intensity in two
areas.
The global field describes the direct brightness on
the vehicle, while the fore-field describes the
lighting conditions in the section of road lying
ahead of the vehicle. This is activated using the
"Auto" setting on the rotary light switch.
Tasks of the rain sensor
The following functions are implemented,
depending on the amount of water on the
windscreen:
– Switch the wiper on and off automatically at
seven different speeds
– Activate the driving light when it is raining
Activation
The rain sensor is activated by positioning the wiper
stalk to the "Intermittent" setting. The driver can
then set four sensitivity ranges using the regulator
for windscreen wiper intermittent operation.
A reference wiper function (wiper action when the
rain/light sensor is activated) is no longer necessary
with this system. This means that the wiper stalk
can always remain at the "Intermittent" setting.
For safety reasons, however, the rain sensor
operation is only activated in this case when a
driving speed of more than 16 km/h is reached, or
when the sensitivity on the regulator for windscreen
wiper intermittent operation is changed.
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Global field
Fore-field
Note
Manually switched wiper intervals have
priority
Light sensor
Rain sensor
photodiode is
also used

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Function of the rain sensor
The rain sensor uses the physical light refraction
principle to register the amount of moisture on the
windscreen. The circular LEDs integrated in the
sensor emit infrared light through the windscreen
from within the interior of the vehicle.
If the windscreen is dry, the infrared light is
reflected on the surface of the glass.
The photodiode integrated in the centre of the
sensor thus records a high light intensity.
If the windscreen is covered with moisture, the
optical properties on the surface of the glass
change. Light now emerges from the windscreen
surface through the light refraction caused by water
drops. As a result, less light is reflected back and the
photodiode records a lower light intensity (light
dispersion principle).
Diagnosis
The control unit for on-board power supply J519 is
used for diagnostic procedures on the sensor for
rain and light detection.
Convenience electrics
326_091 LEDs
Photodiode
326_093Windscreen surface
LED
Photodiode
LED 326_080

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The control unit for wiper motor J400 was
redesigned for use in the new Audi A6 ’05. As is
already the case in the Audi A8 ‘03 and Audi A3 ’04,
the control unit and wiper motor are integrated into
one housing.
It is linked to the control unit for on-board power
supply J519 as a LIN-slave control unit.
Functions
– Intermittent
– Intermittent stages (four)
–One-touch wiping
– Wiper function stage 1
– Wiper function stage 2
– Wipe over again 5 seconds after the last
wash-and-wipe action
(at vehicle speed > 5 km/h only)
– Rain sensor function (see Sensor for rain and
light detection G397)
– Service setting
– Alternating parking position (can be coded)
Function diagram
G397 Sensor for rain and light detection
J400 Control unit for wiper motor
J519 Control unit for on-board power supply
Reference
For further information on the control unit
for wiper motor J400, please refer to the
SSP 287, Audi A8 ‘03 – Electrical
Components.
Note
The control unit for on-board power
supply J519 now activates the windscreen
washer pump V5.
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Control unit for wiper motor J400
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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
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Installation position
The central control unit for the convenience system
is installed above the battery in the rear right of the
boot.
System overview
Convenience electrics
– Tailgate/boot lid "softtouch"
– Tailgate/boot lid locking cylinder closed
– Brake light switch
– B rake li ght signal from control u ni t fo r ABS with
EDL J104
– Garage door opener (adaptation flashing)– Crash input
– Tailgate/boot lid contact
–Tank plug lock detection (USA)
– Alarm horn H12 (via LIN bus)
– Sensor for passenger compartment
monitoring G273 (via LIN bus)
– Rear footwell lights, left and right
– Boot light
– Motor for rear sun blind V91
– Motor for tank cap locking V155
– Motor for tailgate/boot lid central locking V53
– Interior lighting roof module
– Passenger compartment light
– Alarm horn H12 (via LIN bus)– High-level brake light (LED)
– Tail light, left and right
–Brake light, left and right
– Reversing light, right
–Rear fog light, left
– Number plate light
– Heated rear window Z1
– Rear direction indicator light, left and right
– Level control unit J197
(doors open/closed) The central control unit for the convenience system J393 receives the following input signals:
The central control unit for the convenience system J393 activates the following loads:
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Interior lighting control
Standard equipment function
The standard function includes activating the inside
light in the roof lining, the front footwell lights, the
glove compartment light and the boot light.
The central control unit for the convenience
system J393 activates the inside light in the roof
lining, the boot light and the glove compartment
light directly via its own outputs and inputs. The
control unit for on-board power supply J519
activates the front footwell lights via CAN messages
from the central control unit for the convenience
system J393.
Additional equipment function (light package)
The light package additional equipment also
includes a door contour light in every door as well
as footwell lights (front and rear), which are based
on LED technology. The door contour lighting is
activated by the door control unit, which receives
the CAN messages for this from the central control
unit for the convenience system J393.