1999 AUDI A4 traction control

01-388

Printed output from
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
01418
Pilot valve -1- traction
control -N225-
Open circuit, short circuit to B+ or Ground (GND)
in wiring between ABS hydraulic unit -N55- and
ABS control module -J104-.
Pilot valve -1- traction control -N225-
malfunctioning.
Repair Manual, Brake System, Repair
Group 45
- Carry out "electrical test", step 5 page 01
-
318
.
- If the electrical test does not reveal any
malfunctions, check all wiring and connectors
for loose contacts.
- If the suggested steps do not lead to a
localization of the malfunction, replace the
ABS control module (w/EDL) -J104-.
01419
Pilot valve -2- traction
control -N226-
Open circuit, short circuit to B+ or Ground (GND)
in wiring between ABS hydraulic unit -N55- and
ABS control module -J104-.
Pilot valve -2- traction control -N226-
malfunctioning. - Carry out "electrical test", step 5 page 01
-
318
.
- If the electrical test does not reveal any
malfunctions, check all wiring and connectors
for loose contacts.
- If the suggested steps do not lead to a
localization of the malfunction, replace the
ABS control module (w/EDL) -J104-.
Pa
ge 34 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

01-389

Printed output from
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
01420
High pressure switch
valve -1- traction
control -N227-
Open circuit, short circuit to B+ or Ground
(GND) in wiring between ABS hydraulic unit -
N55- and ABS control module -J104-.
High pressure switch valve -1- traction control -
N227- malfunctioning.
Repair Manual, Brake System, Repair
Group 45
- Carry out "electrical test", step 6 page
01
-318
.
- If the electrical test does not reveal any
malfunctions, check all wiring and
connectors for loose contacts.
- If the suggested steps do not lead to a
localization of the malfunction, replace the
ABS control module (w/EDL) -J104-.
01421
High pressure switch
valve -2- traction
control -N228-
Open circuit, short circuit to B+ or Ground
(GND) in wiring between ABS hydraulic unit -
N55- and ABS control module -J104-.
High pressure switch valve -2- traction control -
N228- malfunctioning. - Carry out "electrical test", step 6 page
01
-318
.
- If the electrical test does not reveal any
malfunctions, check all wiring and
connectors for loose contacts.
- If the suggested steps do not lead to a
localization of the malfunction, replace the
ABS control module (w/EDL) -J104-.
Pa
ge 36 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

01-390
DTC table; DTCs from 01422 to 01425

Printed output from
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
01422
Hydraulic pump for
traction control -V156-
Insufficient voltage supply to hydraulic pump
for traction control -V156-. - Carry out "electrical test", step 25 page
01
-323
.


Short circuit to Ground (GND) in wiring
between hydraulic pump for traction control -
V156- and ABS control module -J104-.
Open circuit in voltage supply to ABS control
module -J104-.
Electrical Wiring Diagrams, Troubleshooting
& Component Locations - Check wiring between hydraulic pump for
traction control -V156- and ABS control
module -J104- for short to Ground (GND).
- Check the voltage supply lines to ABS
control module -J104-.

See continuation on
next page
Fuse malfunctioning.
Electrical Wiring Diagrams, Troubleshooting
& Component Locations - Replace fuse 42.
Pa
ge 38 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

01-391

Printed output from
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
01422
Hydraulic pump for
traction control -V156-

Continuation:
Short circuit to Ground (GND) in
hydraulic pump for traction
control -V156-.
Repair Manual, Brake System, Repair Group 45
- If you do not find a problem in wiring between hydraulic
pump for traction control -V156- and ABS control module -
J104-, replace hydraulic pump for traction control -V156-.


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 39 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

01-392

Printed output from
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
01422
Continuation:
Hydraulic pump for
traction control -V156-
Short circuit to B+
Open circuit in wiring between hydraulic
pump for traction control -V156- and ABS
control module -J104-. - Check wiring between hydraulic pump for
traction control -V156- and ABS control module
-J104- for open circuit.



See continuation on
next page Short circuit to B+ in wiring between
hydraulic pump for traction control -V156-
and ABS control module -J104-.
Electrical Wiring Diagrams, Troubleshooting
& Component Locations - Check wiring between hydraulic pump for
traction control -V156- and ABS control module
-J104- for short to B+.
Pa
ge 40 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

01-393

Printed output from
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
01422
Hydraulic pump for
traction control -V156-
Short circuit to B+

Continuation:
Open circuit or short circuit to B+
in hydraulic pump for traction
control -V156-.
Repair Manual, Brake System, Repair Group 45
- If you do not find a problem in wiring between hydraulic
pump for traction control -V156- and ABS control module -
J104-, replace hydraulic pump for traction control -V156-.


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 41 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

01-394

Printed output from
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
01422
Continuation:
Hydraulic pump for
traction control -V156-
Open circuit/short
circuit to Ground
(GND)
Short circuit to Ground (GND) in wiring
between hydraulic pump for traction
control -V156- and ABS control module
-J104-.
Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Check wiring between hydraulic pump for traction
control -V156- and ABS control module -J104- for
short to Ground (GND).


Short circuit to Ground (GND) in
hydraulic pump for traction control -
V156-.
Repair Manual, Brake System, Repair Group 45
- If you do not find a problem in wiring between
hydraulic pump for traction control -V156- and ABS
control module -J104-, replace hydraulic pump for
traction control -V156-.

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 42 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

01-418

Printed output from
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
01435
Sender 1 for brake
booster -G201-

Continuation:
Sensor for brake pressure -G201-
malfunctioning.
Repair Manual, Brake System, Repair Group 45

Repair Manual, Brake System, Repair Group 47 - If none of the causes listed are causing the
malfunction, replace hydraulic pump for traction control
V-156- and sensor for brake pressure -G201-.
- Bleed brake system.





See continuation on
next page
Open circuit in one of the voltage
supply wires to sensor for brake
pressure -G201-.
Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Check Ground (GND) between sensor for brake
pressure -G201- (terminal 1) and ABS control module -
J104- (terminal 67).
- Check voltage supply between sensor for brake
pressure -G201- (terminal 3) and ABS control module -
J104- (terminal 69).
Pa
ge 69 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