1999 AUDI A4 steering

01-379

Printed output from
VAG1551 Scan Tool (ST) Possible cause
Corrective action
00778
Steering angle sensor -
G85-
Not adjusted or incorrectly
adjusted
Steering angle sensor -G85- is not sending
adjustment values or is sending incorrect
values - Zero the steering angle sensor page
01
-243

00778
Steering angle sensor -
G85-
Mechanical malfunction
The steering angle sensor -G85- is not
installed correctly.
Repair Manual, Brake System, Repair
Group 45
- Check installed position of the steering
angle sensor


Vehicle alignment is not OK
Repair Manual, Suspension, Wheels,
Steering, Repair Group 44; Vehicle alignment
- Perform vehicle alignment.


Steering wheel was removed and zeroing
was not performed afterward. - Then perform zeroing procedure page
01
-243

Pa
ge 25 of 96 Electronic Stabilization Pro
gram
(ESP
) DTC table
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.17

01-380

Printed output from VAG1551
Scan Tool (ST) Possible cause
Corrective action
00778
Steering angle sensor -G85-
Implausible signal
The steering angle sensor -G85- is
not installed correctly. Zero position calibration is not OK
Repair Manual, Brake System, Repair Group
45
- Check installed position of steering angle
sensor -G85-

Vehicle alignment is not OK
Repair Manual, Suspension, Wheels, Steering,
Repair Group 44; Vehicle alignment
- Perform vehicle alignment.

- Then perform zeroing procedure page 01
-
243

00778
Steering angle sensor -G85-
malfunctioning
Steering angle sensor -G85- is
malfunctioning
Repair Manual, Brake System, Repair Group
45
- Replace steering angle sensor.

- Then perform zeroing procedure page 01
-
243

Pa
ge 26 of 96 Electronic Stabilization Pro
gram
(ESP
) DTC table
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.17

01-403

Printed output from
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
01423
Continuation:
Note:
Sensor for
transverse
acceleration -G200-
Implausible signal
The input signals received by ABS control module -J104- are analyzed by computing programs and
checked for plausibility. If the sensor for transverse acceleration -G200- fails, the relevant computing
program relies primarily on the steering angle sensor -G85-. If you think there is a problem with the
sensor for transverse acceleration -G200-, check whether the steering angle sensor -G85- is OK.
The steering angle sensor must also be checked.
- While driving straight ahead (v < 20 km/h), check the zero position of the steering angle sensor -
G85-, by selecting "Read measuring value block", function 08 page 01
-256
, display group 5
page 01
-270
.
- Check the sensor for transverse acceleration -G200- as described in the instructions for "Read
measuring value block" function 08 page 01
-270
, display group 5, page 01
-270
.
See continuation on
next page There are four possibilities:
Pa
ge 51 of 96 Electronic Stabilization Pro
gram
(ESP
) DTC table
11/20/2002 htt
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.17

01-404

Printed output from
VAG1551 Scan Tool (ST) Possible cause
Corrective action
DTC
01423
Sensor for transverse
acceleration -G200-
Implausible signal

Continuation:
First:
The zero position of steering angle sensor -G85- is not within the specified range, and the
zero position of sensor for transverse acceleration -G200- is within the specified range:





See continuation on next
page
- Then perform zeroing procedure page 01
-243
- Erase DTC memory page 01
-15
- End Output page 01
-16
.
- Road test vehicle page 01
-250
- If the malfunction occurs again, follow the procedure for the second
case.
Pa
ge 52 of 96 Electronic Stabilization Pro
gram
(ESP
) DTC table
11/20/2002 htt
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.17

01-405

Printed output from
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC WARNING!
This is only valid for control modules with no.: 4B0 907 389
01423
Sensor for transverse
acceleration -G200-
Implausible signal

Continuation:
Second:
The zero position of steering angle sensor -G85- is within the specified range, and the zero
position of sensor for transverse acceleration -G200- is not within the specified range:


Open circuit in signal line to sensor for
transverse acceleration -G200-.
Short circuit to B+ or Ground (GND) in
signal line to sensor for transverse
acceleration -G200-. Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Check signal line between sensor for transverse
acceleration -G200 (terminal 2) and ABS control
module -J104- (terminal 18).


See continuation on
next page Note: Only replace the control module as a
last resort.
ABS control module -J104-
malfunctioning
Repair Manual, Brake System, Repair Group 45

- If the malfunction cannot be fixed, replace the
ABS control module -J104-.
Pa
ge 53 of 96 Electronic Stabilization Pro
gram
(ESP
) DTC table
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.17

01-407

Printed output from
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC WARNING!
This is only valid for control modules with no.: 8D0 907 389, 8D0 907 389A, 8D0 907 389D
and 8D0 907 389E.
01423
Sensor for transverse
acceleration -G200-
Implausible signal

Continuation:
Second:
The zero position of steering angle sensor -G85- is within the specified range, and the zero position
of sensor for transverse acceleration -G200- is not within the specified range:


There is an open circuit in one of the signal
wires for the combined sensor for rotation
rate and transverse acceleration.
There is short circuit to B+ or Ground (GND)
in one of the signal wires for the combined
sensor for rotation rate and transverse
acceleration. Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Check the signal wire for the combined sensor
for rotation rate and transverse acceleration,
terminal 4, to the ABS control module -J104-
(terminal 18).


See continuation on Note: Only replace the control module as a last
resort.
ABS control module -J104- malfunctioning
Repair Manual, Brake System, Repair Group
45
- If the malfunction cannot be fixed, replace the
ABS control module -J104-.
Pa
ge 56 of 96 Electronic Stabilization Pro
gram
(ESP
) DTC table
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.17

01-409

Printed output from
VAG1551 Scan Tool (ST) Possible cause
Corrective action
DTC
01423
Sensor for transverse
acceleration -G200-
Implausible signal

Continuation:
Third:
The zero position of steering angle sensor -G85- is not within the specified range, and the
zero position of sensor for transverse acceleration -G200- is not within the specified range:

- Follow the procedures from the first and second cases.
See continuation on next
page
Pa
ge 60 of 96 Electronic Stabilization Pro
gram
(ESP
) DTC table
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.17

01-410

Printed output from
VAG1551 Scan Tool (ST) Possible cause
Corrective action
DTC
01423
Sensor for transverse
acceleration -G200-
Implausible signal

Continuation:
Fourth:
The zero position of steering angle sensor -G85- is within the specified range, and the zero
position of sensor for transverse acceleration -G200- is within the specified range:


Sensor for transverse acceleration -
G200- malfunctioning.
Repair Manual, Brake System, Repair Group
45
- Erase DTC memory page 01
-15
- End Output page 01
-16
.
- Road test vehicle page 01
-250
- If malfunction occurs again, replace sensor for
transverse acceleration -G200-.

Note: Only replace the control module as
a last resort.
ABS control module -J104-
malfunctioning
Repair Manual, Brake System, Repair Group
45
- If the malfunction cannot be fixed, replace the
ABS control module -J104-.
Pa
ge 61 of 96 Electronic Stabilization Pro
gram
(ESP
) DTC table
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.17