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

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An additional on-board power supply control unit is
needed in the Audi A6 ´05 because of the huge
range of functions it offers.
Functions
Control unit 2 for on-board power supply J520
includes the following functions:
– Activate the solenoid valve for Servotronic N119
– Sliding roof convenience opening/closing
– Speed signal for sliding roof
– Tilt sensor for anti-theft warning system
– Glove compartment release
Installation position
Control unit 2 for on-board power supply is located
behind the glove compartment in the module
carrier on the passenger’s side.
Versi on s
Two different versions of control unit 2 for on-board
power supply are available, depending on the
vehicle equipment.
–Low version
(only includes glove compartment release and
Servotronic function only)
–High version
(also with sliding roof/anti-theft warning system)
Convenience electrics
Control unit 2 for on-board power supply J520
326_103

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Function diagram
326_082
Legend
E316 Glove compartment button
J520 Control unit 2 for on-board power supply
N119 Solenoid valve for Servotronic
V1 Motor for sliding roof
V327 Motor for glove compartment releaseAdditional signals
1CAN Convenience High
2CAN Convenience Low

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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