2005 AUDI A6 boot

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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.

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Function diagram
Convenience electrics
C18 Interference filter for windscreen antenna
E26 Switch for glove compartment light
F124 Contact switch for lock cylinder for
tailgate/boot lid, anti-theft warning system,
central locking
F147 Contact switch for make-up mirror
driver’s side
F148 Contact switch for make-up mirror
passenger’s side
F218 Switch for tailgate/boot lid central locking
F248 Button for tailgate/boot lid lock cylinder
release
G273 Sensor for passenger compartment
monitoring
H12 Alarm hornJ9 Relay for rear window heater
J393 Central control unit for convenience system
L46 Lamp for rear fog light, left
M2 Lamp for tail light, right
M4 Lamp for tail light, left
M6 Lamp for direction indicator light, rear left
M8 Lamp for direction indicator light, rear right
M9 Lamp for left brake light
M10 Lamp for right brake light
M17 Lamp for reversing light, right
M25 Lamp for high-level brake light
M49 Lamp for tail light 2, left
M50 Lamp for tail light 2, right
M54 Lamp for tail light 3, left
M55 Lamp for tail light 3, right

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326_120
V53 Motor for tailgate/boot lid central locking
V91 Motor for rear sun blind
V155 Motor for tank cap locking
W6 Glove compartment light
W14 Illuminated make-up mirror, passenger’s side
W18 Boot light, left
W20 Illuminated make-up mirror, driver’s side
W35 Boot light, right
W45 Footwell light, rear left
W46 Footwell light, rear right
X Number plate light
Z1 Heated rear window Additional signals
1CAN Convenience High
2CAN Convenience Low
3 Brake light switch F
4 ESP brake signal from control unit for ABS
with EDL J104
5 Crash signal from airbag control unit J234
6 "Doors OPEN" signal to level control unit J197
7 "Adaptation flashing" signal from control unit
for garage door opening J530
8 "Release" signal to motor for sliding roof V1
9 + 10 "Interior light" activation signal
to roof module W1

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Diagnosis
The central control unit for convenience
system, J393, has the usual diagnostic functions,
such as read fault memory, read measured value
blocks, adaptation, coding, as well as selective and
sequential actuator test at its disposal.
Actuator test
The selective actuator test initiated by the diagnosis
tester can be used to check the following actuators:
– Indicator light for safe central locking K133
(in door rim)
– Lock central locking signal (once)
– Activate safe locking for doors (once)
– Unlock central locking signal
– Lock filler flap
– Unlock filler flap
– Lamp for left brake light M9
– Lamp for right brake light M10
– Lamp for high-level brake light M25
– Lamps for tail light, left
– Lamp for parking light, left M43
– Lamps for tail light, right
– Lamp for parking light, right M44
– Lamp for reversing light, left M16
– Lamp for reversing light, right M17
– Lamp for direction indicator light, rear left M6
– Lamp for direction indicator light, rear right M8
– Lamp for rear fog light, left L46
– Lamp for rear fog light, right L47
Coding
This diagnostic option can be used to perform
coding, for example, for these functions:
– Anti-theft warning system
– Central locking (normal/selective)
–Tilt sensor
– Passenger compartment sensor
– Convenience function via radio
–Right-hand traffic
–Avant detection
–Rear sun blind
Convenience electrics
Note
In addition to the selective actuator test,
the diagnosis software also includes the option
of a sequential actuator test.
– Number plate light X
– Boot light W3
– Footwell light, rear left W45
– Footwell light, rear right W46
– Activation of rear lid remote unlocking
(rotary latch opens, closing aid moves up)
– Motor for rear sun blind (rear sun blind moves in
both directions)
– Signal for rear window heater activation
–Interior lighting
– Acknowledgement of anti-theft warning system
horn
–RoW/USA
–Light package
– Tank cap lock detection
– Equipment (Basic/High-Line)
–Sliding roof
– Multi-function control unit (taxi/emergency
doctor/fire brigade, installed/not installed)

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You may already be familiar with the acoustic
parking aid function "APS" from the Audi A3 ´04.
For use in the Audi A6 ´05, a 4-channel system with
sensors on the rear bumper and an 8-channel
system with sensors on the front and rear bumpers
are available.
Ve rs i on s
The parking aid control unit will be available as
4-channel system and 8-channel system versions.
Only the 4-channel version is available on the
Audi A6 ’05 for the US market.
Installation position
The parking aid control unit is installed above the
right wheel housing in the boot. It is secured in a
frame under the control unit for trailer detection.
Function
The area around the vehicle is monitored by four
ultrasound converters integrated into the front
bumper (8-channel system only) and four
ultrasound converters integrated into the rear
bumper. The acoustic message comes from a tone
generator in the front area of the vehicle and a tone
generator in the back area of the vehicle (only at the
back for the 4-channel system). A parking aid switch
can be used to activate or deactivate the parking aid
manually (8-channel system only). The MMI allows
the customer to adjust the volume and frequency of
the acoustic output of the parking aid.
If the control unit for trailer detection reports the
presence of a trailer on the vehicle via the CAN bus,
the four sensors in the rear bumper are switched
off. The front area of the vehicle is still monitored,
however.
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Parking aid control unit J446
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System overview
Convenience electrics
– Power windows switch
– Internal locking switch
– Actuating elements for central locking
– Actuating elements for central locking
(Safe mode)
– Outer door handle switch (optional)
– Central locking button for outer door handle
– Boot release switch E164– Switch for remote unlocking and
filler flap E204
–Child-lock button E318
– Mirror adjustment change-over switch E48
–Mirror adjustment switch E43
– Mirror adjustment switch with
folding function E168
– Switch for alarm system off E217 (optional)
– Switch for passenger compartment monitoring
(optional) E183
Additional signals for front doors
– Operator unit for memory
– Mirror position sensor
Additional loads for driver’s door
– Contact switch in lock barrel
driver’s side F241
– Central locking motors
– Central locking motors (Safe mode)
– Door warning lights
–Entry lights
– Lighting for inside door handle
– Ambient lighting for doors (optional)Additional loads for front doors
– Mirror adjustment motors
– Mirror folding motors
– Heated door mirrors
– Automatic anti-dazzle mirror
– Entry light in door mirror,
driver’s side and passenger’s side
Additional loads for rear doors
–Lamp for rear ashtray lightAdditional loads for driver’s door
– Lock status LED for passenger’s door
– Indicator light for safe central locking
– Indicator light for tilt sensor K188
(optional)
– Indicator light for passenger compartment
monitoring deactivation K162 (optional)
– Indicator light for memory SET
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The door control units receive the following input signals:
The door control units activate the following loads:

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Versions: Basic, Basic Plus and
Basic Navigation
Infotainment
Decimal
placeDescription
1.Country version: D, GB, USA, F, E, I, P
2.Equipment: ACC, Internal light package, Acoustic parking system, front
3.Equipment: Acoustic parking system, rear, Tyre pressure control system, Air suspension
4.Equipment: Seat memory, front/rear, Left-hand drive
5.Equipment: Standard sound system installation, Body variant, Leather equipment
6.Equipment: On-board computer
7.Reserved
Infotainment control unit holder
In the new Audi A6 ’05, the control units responsible
for Infotainment are mainly stored in a compact
holder behind the left wheel cut-out in the boot.
Only the control unit for front information J523 is
installed in the dash panel, either in a visible
position in the glove compartment (Basic version) or
behind the glove compartment (High version). The
dual-band compensator, the mobile phone
amplifier R86, is fitted on the rear right wheel well.
Reference
Please refer to the relevant Workshop Manual
for details of the exact individual installation
positions.
Coding variants of the control unit for front information J523
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Sound systems
Different sound system versions are available for
the new Audi A6 ´05. A general feature of the
systems is the two subwoofers integrated into the
front doors. A central subwoofer is not installed in
the rear storage area in the Audi A6 ’05 – a standard
feature in other model series.
The base frequencies, which cannot be localised for
the human ear, are amplified by the two tuners in
the doors and are used to round off the audio
pattern in the interior of the vehicle. This saves
space in the rear area, which increases the boot
volume and leaves more room for installing other
control units.
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The new Audi A6 ´05 is equipped with a two-way
loudspeaker system in the front doors as standard.
The related amplifier with two 20-watt drivers is
integrated into the control unit for information J523.
Diagnosis of the standard amplifier module is
performed using the address word 47 in the
VAS diagnosis tester. The possible diagnostic
functions are contained in the list of diagnostic
options for the control unit for front information
J523 on page 78 in this chapter.
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Audi A6 ‘05 front door with subwoofer and loudspeaker installation
positions
1 Control unit for front information J523 including
2x20-watt drivers, front display unit J685 and
Multimedia operating unit E380
2 High-pitch loudspeaker, front left R20 and
mid/low-pitch loudspeaker, front left R101
3 High-pitch loudspeaker, front right R22 and
mid/low-pitch loudspeaker, front right R102
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