AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System

AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System https://www.carmanualsonline.info/img/6/840/w960_840-0.png AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System

Page 31 of 44

AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 31
123
1 237 8496513
BL NSL 31 58l RF BR 30 34 58r 3110 11 12
The trailer operation signal …
..... comes from the F216 contact switch in the 
trailer socket.
When the plug is connected, contact swit

Page 32 of 44

AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 32
Interfaces
pt° M
1
A
B
C
D
234
IVIIIIII
567
912
8
MM
31
Functional diagram
Terminal 15 Terminal 30
T. 3 4Terminal 30
S S S
N150
N151
N311 N148
N149
G291
V66
G290N111
J197
G76 G77 G78 G289
J431
V48

Page 33 of 44

AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 33
Key to function diagram
E281 Self-levelling suspension operating 
unit 
F216 Contact switch for switchable rear fog 
light
G76 Self levelling suspension sender, RL 
G77 Self levelling suspension se

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 34
However, all level sensors (left and right) are 
required in the air suspension system run-up 
and run-on mode (ignition OFF). 
To allow the left-hand level sensors to deliver 
measured values in t

Page 35 of 44

AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 35
Level change process:
Raising - rear axle first, then front axle 
Lowering - front axle first, then rear axle 
Modes
Height mode/driving mode
Reaction times upon level deviation
Control character

Page 36 of 44

AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 36
Control concepts
The system can switch between sleep mode 
and run-on/run-up mode, triggered via the 
door contact signal, a maximum of 15 times. 
For the 15 subsequent wake-up procedures, 
the sys

Page 37 of 44

AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 37
In trailer operation, normal mode must 
always be selected and care must be 
taken that the system is switched to 
manual mode (e.g. no automatic 
switching to manual mode if trailer 
operation sig

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 38
Special tools
Adapter cable 1598/35 with test box 1598/14 
are used for fault finding and function testing 
of sensors and signals of the 4-level air 
suspension system.
As the pin assignment of t

Page 39 of 44

AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 39
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 val

Page 40 of 44

AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 40
Self-diagnosis
Address word:   34 Self levelling suspension
Both generations of diagnostic tester 
(V.A.G. 1551/1552 and VAS 5051) are suitable 
for communication with the 4-level air 
suspension c
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