2000 AUDI A4 ABS

01-112

Output on printer of
VAG1551 Scan Tool (ST) Possible cause
Corrective action
DTC
00597
Varying wheel speed impulse
ABS wheel speed sensor rotor dirty or
damaged.
Repair Manual, Brake System,
Repair Group 45
- Check rotor.

Excessive wheel bearing play.
Repair Manual, Brake System,
Repair Group 45
- Check wheel bearing

ABS wheel speed sensors -G44-, -G45-, -G46-,
and -G47- installed incorrectly. ABS wheel speed sensors -G44-, -G45-, -G46-,
and -G47- malfunctioning Repair Manual, Brake System,
Repair Group 45
- Check ABS wheel speed sensors.
- Carry out "electrical test", steps 7
through 10 page 01
-68
.

Wheel or tire sizes not the same on all four
wheels. - Check wheel and tire sizes.
Pa
ge 71 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-113

Output on printer of
VAG1551 Scan Tool (ST) Possible cause
Corrective action
DTC
00623
ABS / transmission electrical
connection Manual transmission:

This malfunction only
occurs if vehicle is
equipped with ASR.
ABS/EDL/ASR control module -J104- incorrectly
coded. Short circuit to B+ at terminal 45
Electrical Wiring Diagrams,
Troubleshooting & Component
Locations - Check coding of
ABS/EDL/ASR control module -
J104- page 01
-56
.
- Locate and repair short circuit.

Automatic transmission:

Open circuit or short circuit to Ground (GND) in wiring
between ABS/EDL/ASR control module -J104- and
Transmission Control Module (TCM) -J217-. ABS/EDL/ASR control module -J104- incorrectly
coded.
Electrical Wiring Diagrams,
Troubleshooting & Component
Locations - Check coding of
ABS/EDL/ASR control module -
J104- page 01
-56
.
- Locate and repair open circuit
or short circuit.
Pa
ge 72 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-114

Output on printer of
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
00642
Right front traction
control switch-over
valve -N166-
Open circuit, short circuit to B+ or Ground (GND)
in wiring between ABS hydraulic unit -N55- and
ABS control module -J104-.
Right front traction control switch-over valve -
N166- malfunctioning. - Carry out "electrical test", steps 5 +18
page 01
-68
.
- If the electrical test does not reveal any
malfunctions, check all wiring and
connectors for loose contacts.
- If no problems are found after
implementing the specified steps, replace
the control module.
00643
Right front traction
control outlet valve -
N167-
Open circuit, short circuit to B+ or Ground (GND)
in wiring between ABS hydraulic unit -N55- and
ABS control module -J104-.
Right front traction control outlet valve -N167-
malfunctioning. - Carry out "electrical test", steps 6 +18
page 01
-68
.
- If the electrical test does not reveal any
malfunctions, check all wiring and
connectors for loose contacts.
- If no problems are found after
implementing the specified steps, replace
the control module.
Pa
ge 73 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-115

Output on printer of
VAG1551 Scan Tool
(ST) Possible cause
Corrective action
DTC
00644
Left front traction
control switch-over
valve -N168-
Open circuit, short circuit to B+ or Ground (GND)
in wiring between ABS hydraulic unit -N55- and
ABS control module -J104-.
Left front traction control switch-over valve -N168-
malfunctioning. - Carry out "electrical test", steps 5 +17
page 01
-68
.
- If the electrical test does not reveal any
malfunctions, check all wiring and
connectors for loose contacts.
- If no problems are found after
implementing the specified steps, replace
the control module.
00645
Left front traction
control outlet valve -
N169-
Open circuit, short circuit to B+ or Ground (GND)
in wiring between ABS hydraulic unit -N55- and
ABS control module -J104-.
Left front traction control outlet valve -N169-
malfunctioning. - Carry out "electrical test", steps 6 +17
page 01
-68
.
- If the electrical test does not reveal any
malfunctions, check all wiring and
connectors for loose contacts.
- If no problems are found after
implementing the specified steps, replace
the control module.
Pa
ge 74 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-116

Output on printer of VAG1551 Scan
Tool (ST) Possible cause
Corrective action
DTC

00646
ABS-ASR motor electrical connection 1
Open circuit or short circuit to B+ or Ground
(GND) in wiring between ABS control module
-J104- terminal 18 and Engine Control
Module (ECM).
Electrical Wiring
Diagrams, Troubleshooting &
Component Locations - Locate and repair open
circuit or short circuit.
Note:
The following signals are sent from the
ABS control module (w/EDL) -J104- to the
Engine Control Module (ECM) via this
connection:

MMD signal (Masked Misfire
Diagnostic) for On Board Diagnostic
(OBD)
SET signal (Specified Engine Torque)




ABS control module -J104- malfunctioningEngine Control Module (ECM)
malfunctioning.



- Replace ABS control
module (w/EDL) -J104-.
- Replace Engine Control
Module (ECM).
Pa
ge 75 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-117

Output on printer of VAG1551 Scan
Tool (ST) Possible cause
Corrective action
DTC

00647
ABS-ASR motor electrical connection 2
Open circuit or short circuit to B+ or Ground
(GND) in wiring between ABS control module -
J104- terminal 47 and Engine Control Module
(ECM).
Electrical Wiring Diagrams,
Troubleshooting &
Component Locations - "Read measuring value
block", display group 3
page 01
-67
.
- Locate and repair open
circuit or short circuit.
Note:
The following signal is sent from the
Engine Control Module (ECM) to the
ABS control module (w/EDL) -J104- via
this connection:

AET signal (Actual Engine Torque)





Engine Control Module (ECM) malfunctioning.





- Replace Engine Control
Module (ECM).
Pa
ge 76 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

ABS/EDL/ASR control module -J104-
malfunctioning. - Replace ABS/EDL/ASR
control module -J104-.
Pa
ge 77 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-118

Output on printer of VAG1551 Scan Tool (ST)
Possible cause
Corrective action
DTC

00668
Vehicle voltage terminal 30, open circuit

When equipped with EDL, the ABS control module
-J104- requires this voltage supply after ignition is
switched off in order to calculate the drop in brake
temperature; page 01
-39
.
Voltage supply to ABS control
module (w/EDL) -J104- (terminal
50) has an open circuit or short
circuit to Ground (GND). Electrical Wiring
Diagrams, Troubleshooting
& Component Locations - Check wire connection.
Pa
ge 78 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8