sensor AUDI A4 1995 B5 / 1.G Brakes Output DTM 03 Workshop Manual

01-149


Output Diagnostic Test Mode
(DTM) (function 03)
Output Diagnostic Test Mode (DTM) is used to
check the function of actuators. Actuators are
also called actors. These are components that
the control module activates when it reacts to the
signals sent by sensors.
"Function of actuators" includes all functions and
properties of an actuator under operating
conditions. This means, for example:

- An electrically operated hydraulic valves that
opens and closes when activated by the control
module.

- The relay of an electrical motor when activated
by the control module. The motor switches on
and carry outs the task.
Before initiating the output Diagnostic Test Mode
(DTM), make sure there are no electrical
malfunctions in the system you wish to test. This
will enable you to recognize any mechanical
problems. Perform a guided troubleshooting
before starting output Diagnostic Test Mode
(DTM) page 01
-19
.
Are you sure there are no electrical malfunctions
in the system? If you have made sure that there
are no electrical malfunctions in the system, you
Pa
ge 1 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-170

Terminal
Wire connection to component ...
1
Right rear ABS wheel speed sensor -G44- 2
Right rear ABS wheel speed sensor -G44-
for vehicles with Front Wheel Drive (FWD) and ABS/EDL/ASR for vehicles with All Wheel Drive (AWD) and ABS/EDL
3
Right rear ABS wheel speed sensor -G44-
for vehicles with Front Wheel Drive (FWD) and ABS/EDL
3
Right front ABS wheel speed sensor -G45-
for vehicles with Front Wheel Drive (FWD) and ABS/EDL/ASR
4
Right front ABS wheel speed sensor -G45-
for vehicles with Front Wheel Drive (FWD) and ABS/EDLfor vehicles with All Wheel Drive (AWD) and ABS/EDL
5
Right front ABS wheel speed sensor -G45- 6
Left front ABS wheel speed sensor -G47- 7
Left front ABS wheel speed sensor -G47- 8
Left rear ABS wheel speed sensor -G46- 9
Left rear ABS wheel speed sensor -G46-
Pa
ge 24 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-171

Terminal
Wire connection to component ...
10
Electrical connection to instrument cluster
Only for vehicles equipped with EDL. The time signals used to calculate standing time are transmitted via
this harness connector
11
K-wire 13
MMD signal (Masked Misfire Diagnostic)
For vehicles equipped with ASR, the SET signal (Specified Engine Torque) is also transmitted via this wiring
harness.
14
Brake light switch -F- 15
Voltage supply, terminal 15 16
Ground (GND) terminal 31 (ABS hydraulic pump -V64-) 17
Battery + (terminal 30) 18
Battery + (terminal 30) 19
Ground (GND) terminal 31 (ABS control module -J104-) 20
Traction control (ASR) indicator light activation
Only for vehicles equipped with ASR.
21
ABS/EDL warning light activation 23
Speed sensor output rear left
For vehicles with navigation system
Pa
ge 25 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13

24
Speed sensor output rear right
For vehicles with navigation system
Pa
ge 26 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-177

Set measurement range:
Resistance measurement (2 k ) Test
step VAG
1598
sockets Test of
Test
requirements
- Additional work
steps Specified
value Corrective action
4
4 + 5
1) 2)
3 + 5
3) Resistance of right
front ABS wheel
speed sensor -G45-
- Check electrical wiring between control
module and wheel speed sensor for open
circuit and for short circuit to Ground
(GND) or B+
5 6 + 7

(all
versions) Resistance of left
front ABS wheel
speed sensor -G47-
Ignition
switched off 400 2300
Electrical Wiring Diagrams,
Troubleshooting & Component Locations - Check harness connectors.
- Move wire during test (loose contact).- Replace the relevant ABS wheel speed
sensor if specified value is not obtained
and the electrical wiring is OK.
1) Assignment of wheel speed sensor terminals for vehicles with Front Wheel Drive (FWD) and equipped with EDL. 2) Assignment of wheel speed sensor terminals for vehicles with All Wheel Drive (AWD) and equipped with EDL. 3) Assignment of wheel speed sensor terminals for vehicles with Front Wheel Drive (FWD) and equipped with ASR.
Pa
ge 32 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-178

Set measurement range:
Resistance measurement (2 k ) Test
step VAG
1598
sockets Test of
Test
requirements
- Additional work
steps Specified
value Corrective action
6
1 + 3
1)
1 + 2
2) 3) Resistance of right
rear ABS wheel
speed sensor -G44-
- Check electrical wiring between control
module and wheel speed sensor for open
circuits and for short circuit to Ground
(GND) or B+
7 8 + 9

(all
versions) Resistance of left
rear ABS wheel
speed sensor -G46-
Ignition
switched off 400 2300
Electrical Wiring Diagrams,
Troubleshooting & Component Locations - Check harness connectors.
- Move wire during test (loose contact).- Replace the relevant ABS wheel speed
sensor if specified value is not obtained
and the electrical wiring is OK.
1) Assignment of wheel speed sensor terminals for vehicles with Front Wheel Drive (FWD) and equipped with EDL. 2) Assignment of wheel speed sensor terminals for vehicles with All Wheel Drive (AWD) and equipped with EDL. 3) Assignment of wheel speed sensor terminals for vehicles with Front Wheel Drive (FWD) and equipped with ASR.
Pa
ge 33 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-189

DTC
Possible cause
Corrective action
Printed output from
VAG1551 Scan Tool
(ST)

00283
Left front ABS wheel
speed sensor -G47-1)
Mechanical
malfunction
or:
Left rear ABS wheel speed sensor -
G47- installed incorrectly.
ABS wheel speed sensor rotor dirty or
damaged.
Excessive wheel bearing play.
ABS wheel speed sensor -G47-
malfunctioning.
Short circuit to Ground (GND). Repair Manual, Brake System, Repair Group 45

Repair Manual, Brake System, Repair Group 45
Repair Manual, Suspension, Wheels, Steering,
Repair Group 40
- Check installation of ABS wheel speed sensor.
- Check rotor, clean or replace- Replace wheel bearing- "Read measuring value block" display group 1
page 01
-140
.
- Carry out "Electrical test", step 5 page 01
-166
.
Left front ABS wheel
speed sensor -G47-
Open circuit/short
circuit to B+
Open circuit or short circuit to B+ in
wiring between ABS wheel speed
sensor -G47- and ABS control module -
J104-. - If nothing is displayed during "Read measuring value
block", and no malfunction could be determined in the
wiring or the ABS wheel speed sensor, replace the
hydraulic control unit.
Pa
ge 44 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-190

DTC
Possible cause
Corrective action
Printed output from
VAG1551 Scan Tool
(ST)

00285
Right front ABS
wheel speed sensor
-G45-
1)
Mechanical
malfunction
or:
Left rear ABS wheel speed sensor -
G45- installed incorrectly.
ABS wheel speed sensor rotor dirty or
damaged.
Excessive wheel bearing play.
ABS wheel speed sensor -G45-
malfunctioning.
Short circuit to Ground (GND). Repair Manual, Brake System, Repair Group 45

Repair Manual, Brake System, Repair Group 45
Repair Manual, Suspension, Wheels, Steering,
Repair Group 40
- Check installation of ABS wheel speed sensor.
- Check rotor, clean or replace- Replace wheel bearing- "Read measuring value block" display group 1
page 01
-140
.
- Carry out "Electrical test", step 4 page 01
-166
.
Right front ABS
wheel speed sensor
-G45-
Open circuit/short
circuit to B+
Incorrect control module version.
Open circuit or short circuit to B+ in
wiring between ABS wheel speed
sensor -G45- and ABS control module -
J104-. - Check control module version page 01
-128
.
- If nothing is displayed during "Read measuring value
block", and no malfunction could be determined in the
wiring or the ABS wheel speed sensor, replace the
hydraulic control unit.
Pa
ge 46 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-191

DTC
Possible cause
Corrective action
Printed output from
VAG1551 Scan Tool
(ST)

00287
Right rear ABS
wheel speed sensor
-G44-
1)
Mechanical
malfunction
or:
Left rear ABS wheel speed sensor -
G44- installed incorrectly.
ABS wheel speed sensor rotor dirty or
damaged.
Excessive wheel bearing play.
ABS wheel speed sensor -G44-
malfunctioning.
Short circuit to Ground (GND). Repair Manual, Brake System, Repair Group 45

Repair Manual, Brake System, Repair Group 45
Repair Manual, Suspension, Wheels, Steering,
Repair Group 42
- Check installation of ABS wheel speed sensor.
- Check rotor, clean or replace- Replace wheel bearing- "Read measuring value block" display group 1
page 01
-140
.
- Carry out "Electrical test", step 6 page 01
-166
.
Right rear ABS
wheel speed sensor
-G44-
Open circuit/short
circuit to B+
Incorrect control module version.
Open circuit or short circuit to B+ in
wiring between ABS wheel speed
sensor -G44- and ABS control module -
J104-. - Check control module version page 01
-128
.
- If nothing is displayed during "Read measuring value
block", and no malfunction could be determined in the
wiring or the ABS wheel speed sensor, replace the
hydraulic control unit.
Pa
ge 48 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-192

DTC
Possible cause
Corrective action
Printed output from
VAG1551 Scan Tool
(ST)

00290
Left rear ABS wheel
speed sensor -G46-
1)
Mechanical
malfunction
or:
Left rear ABS wheel speed sensor -
G46- installed incorrectly.
ABS wheel speed sensor rotor dirty or
damaged.
Excessive wheel bearing play.
ABS wheel speed sensor -G46-
malfunctioning.
Short circuit to Ground (GND). Repair Manual, Brake System, Repair Group 45

Repair Manual, Brake System, Repair Group 45
Repair Manual, Suspension, Wheels, Steering,
Repair Group 42
- Check installation of ABS wheel speed sensor.
- Check rotor, clean or replace- Replace wheel bearing- "Read measuring value block" display group 1
page 01
-140
.
- Carry out "Electrical test", step 7 page 01
-166
.
Left rear ABS wheel
speed sensor -G46-
Open circuit/short
circuit to B+
Open circuit or short circuit to B+ in
wiring between ABS wheel speed
sensor -G46- and ABS control module -
J104-. - If nothing is displayed during "Read measuring value
block", and no malfunction could be determined in the
wiring or the ABS wheel speed sensor, replace the
hydraulic control unit.
Pa
ge 50 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13