sensor AUDI A4 1999 B5 / 1.G Brakes ESP DTC Table Service Manual

01-427

Printed output
from VAG1551
Scan Tool (ST) Possible cause
Corrective action
DTC
01542
Sender for
rotation rate -
G202-
Implausible
signal The input signals received by ABS control module -J104- are analyzed by computing programs and
checked for plausibility. If the sender for rotation rate -G202- fails, the relevant computing program relies
primarily on the steering angle sensor -G85- and the sensor for transverse acceleration -G200-. If you
think there is a problem with the sender for rotation rate -G202-, check whether the steering angle
sensor -G85- and sensor for transverse acceleration -G200- are OK. These must also be checked.
- While driving straight ahead (v < 20 km/h), check the zero position of the steering angle sensor -G85-,
by selecting display group 5 in "Read measuring value block", function 08 page 01
-256
.
- 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.
See continuation
on next page There are four possibilities:
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01-428

Printed output from VAG1551
Scan Tool (ST) Possible cause
Corrective action
DTC
01542
Sender for rotation rate -G202-
Implausible signal

Continuation:
First: (Also note the fourth possibility)
The zero position of steering angle sensor -G85- is not within the specified range, and the
zero position of yaw sensor -G202- is within the specified range:



See continuation on next
page
- Perform zeroing. 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.
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01-429

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
01542
Sender for rotation rate -
G202-
Implausible signal

Continuation:
Second: (Also note the fourth possibility)
The zero position of steering angle sensor -G85- is within the specified range, and the zero
position of yaw sensor -G202- is not within the specified range:



See continuation on next
page
Open circuit in signal wire of sender
for rotation rate -G202-.
Short circuit to B+ or Ground (GND)
in signal wire to sender for rotation
rate -G202-. Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Check signal line between yaw sensor -G202-
(terminal 3) and ABS control module -J104-
(terminal 79).
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01-430

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
01542
Sender for rotation rate -
G202-
Implausible signal

Continuation: (Second)


See continuation on next
page
Open circuit in supply line
to yaw sensor -G202-.
Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Check Ground (GND) between yaw sensor -G202-
(terminal 1) and ABS control module -J104- (terminal 80).
- Check voltage supply between yaw sensor -G202-
(terminal 2) and ABS control module -J104- (terminal 34).
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01-431

Printed output from VAG1551
Scan Tool (ST) Possible cause
Corrective action
DTC
01542
Sender for rotation rate -G202-
Implausible signal

Continuation: (Second)
Sender for rotation rate -G202-
malfunctioning. If none of the causes fit:
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 yaw
sensor -G202-.


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-.
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01-432

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.
01542
Sender for rotation rate
-G202-
Implausible signal

Continuation:
Second: (Also note the fourth possibility)
The zero position of steering angle sensor -G85- is within the specified range, and the zero position
of the sensor for transverse acceleration -G200-, or the combined sensor for rotation rate and
transverse acceleration, 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).
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01-433

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.
01542
Sender for rotation
rate -G202-
Implausible signal

Continuation:
(Second)




See continuation on
next page
There is an open circuit in one of the
voltage supply wires for the combined
sensor for rotation rate and transverse
acceleration.
Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Check the Ground (GND) supply for the combined
sensor for rotation rate and transverse acceleration,
terminal 2, to the ABS control module -J104-
(terminal 80).
- Check the voltage supply of the combined sensor
for rotation rate and transverse acceleration,
terminal 1, to the ABS control module -J104-
(terminal 34).
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01-434

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.
01542
Sender for rotation rate -
G202-
Implausible signal

Continuation: (Second)
The combined sensor for rotation rate
and transverse acceleration is
malfunctioning. If none of the causes fit:
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
combined sensor for rotation rate and
transverse acceleration.


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-.
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01-435

Printed output from
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
01542
Sender for rotation rate -
G202-
Implausible signal

Continuation:
Third: (Also note the fourth possibility)
The zero position of steering angle sensor -G85- is not within the specified range, and the zero
position of the sensor for transverse acceleration -G200-, or the combined sensor for rotation
rate and transverse acceleration, is not within the specified range:

- Follow the procedures from the first and second possibilities.
See continuation on
next page
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01-436

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
01542
Sender for rotation rate -
G202-
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:

- Check the sender for rotation rate -G202- by selecting the "Read measuring value block"
function 08 page 01
-256
, display group 5,


The yaw sensor -G202- is loose.
Repair Manual, Brake System, Repair Group 45

- Check bolts for yaw sensor -G202-.



See continuation on next
Open circuit in signal wire of sender
for rotation rate -G202-.
Short circuit to B+ or Ground (GND)
in signal wire to sender for rotation
rate -G202-. Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Check signal line between yaw sensor -G202-
(terminal 3) and ABS control module -J104-
(terminal 79).
Pa
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pair&id=AUDI.B5.SU02.01.17