Pneumatic suspension system Part 2 4-level air ... - Volkspage

Basic system setting
The basic system setting of the reference
level in the 4-level air suspension system is
performed by inputting body-level measured
values at normal level.
The measured value, the vertical dimension
from the wheel centre to the wheel cut-out,
must be input into the control unit using a
diagnostic tester in function 10 “Adaption”.
(Procedure, see Workshop Manual).
The codes serve to define the reference value
for normal level (allroad quattro 402 mm).
This means that design-specific values of the
level sensors are adjusted for this dimension.
Due to the tolerances of the components
involved, there is a certain deviation between
actual (measured) and reference (defined)
values.
Codes for the allroad quattro
25500
Position
X0000
0X000
00X00
000X0
0000X
Meaning
1 = Headlamp control not
installed
2 = Headlamp control installed
5 = Reference height, front
axle 402 mm
5 = Reference height, rear axle
402 mm
0 = Vacant
0 = Vacant
By the inputting of the actual value, control
unit J197 recognises a potential difference to
the reference value. based on which the
design-specific values from the level sensors
are adapted.
Advantages of the measurement method:
• No influence of the correct basic setting
due to …
402 mm
... different tread depths and tyre pressures.
... minor unevenness of the road surface.
... different tyre sizes.
• Simple to perform.
402 mm
243_018
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