traction control AUDI A4 1998 B5 / 1.G Brakes Output DTM 03 Workshop Manual

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
)
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e=re
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01-172

Terminal
Wire connection to component ...
27
AET (Actual Engine Torque)
Only for vehicles equipped with ASR.
28
TI (Transmission Influence)
Only for vehicles equipped with ASR.
29
CAN-bus low
The CAN-bus wires transmit the following signals to the appropriate control modules: AET (Actual Engine
Torque), SET (Specified Engine Torque), TI (Transmission Influence) and engine speed.
30
CAN-bus high
The CAN-bus wires transmit the following signals to the appropriate control modules: AET (Actual Engine
Torque), SET (Specified Engine Torque), TI (Transmission Influence) and engine speed.
30
Engine speed (RPM)
Only for vehicles equipped with ASR.
31
Traction control (ASR) button
Only for vehicles equipped with ASR.
Pa
ge 27 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
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yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-182

Function test: Red brake warning symbol
Test step
VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified value
Corrective action
9

Continuation: Function of red
"brake system
malfunction"
symbol - Connect VAG1551 scan
tool and select address
word 03
- For vehicles with
automatic transmission and
high-line instrument cluster,
depress the brake pedal
and select a driving gear. The ABS indicator lamp
and the red "brake system
malfunction" symbol light
up. If the traction control
indicator light is installed
and OK, it also lights up. Repair Manual,
Electrical Equipment, Repair Group 90; instrument cluster.

- Malfunction in
instrument cluster
Pa
ge 37 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
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01-183

Function test: Traction control indicator light -K86-, only installed on vehicles equipped with ASR
Test
step VAG
1598
sockets Test of
Test requirements
- Additional work stepsSpecified
value Corrective
action
10 - Function of traction
control indicator light -
K86- DTC memory checked and no DTC
present in DTC memory of ABS control
module -J104-. Ignition switched off Multi-pin connector connected to ABS
control module -J104- and retainer catch
engaged.
Test step 10: Continued on
next page.
Pa
ge 38 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-184

Function test: Traction control indicator light -K86-, only installed on vehicles equipped with ASR
Test step
VAG
1598
sockets Test of
Test
requirements
- Additional work
steps Specified value
Corrective action
10

Continuation: - Function of
traction
control
indicator light
-K86- - Switch on
ignition Traction control
indicator light -K86-
comes on for two
(2) seconds and
then goes out.
Electrical Wiring Diagrams,
Troubleshooting & Component
Locations - If traction control indicator light does
not light up, check vehicle voltage and
wire from terminal 20 of ABS control
module -J104- to instrument cluster for
short circuit to B+ and open circuit.
- If traction control indicator lights
continuously, test wire from terminal 20
of ABS control module -J104- to
instrument cluster for short circuit to
Ground (GND).

Repair Manual, Electrical Equipment,
Repair Group 90; instrument cluster.
- If vehicle voltage and wire from
terminal 20 of ABS control module -
J104- to instrument cluster are OK
there is a malfunction in instrument
cluster, LED or bulb malfunctioning.
Pa
ge 39 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-185

Function test: Traction control button; set measurement range on VAG1526: 20 V =
Test
step VAG
1598
sockets Test of
Test requirements
- Additional work stepsSpecified value
Corrective action
11 - Function of
traction control
button Ignition switched off Function of traction control
indicator light -K86- was
already checked in step 10. Multi-pin connector connected
to ABS control module -J104-
and retainer catch engaged.
- Switch on ignition

- Press traction control buttonTraction control
indicator light -
K86- lights up - Switch off ignition.
- Detach multi-pin
connector from ABS control
module -J104- and remove.

- Press traction control button
again Traction control
indicator light -
K86- goes out. - Connect VAG1598 test
box using VAG1598/27
adapter.
Test step 11: Continued on next page.
Pa
ge 40 of 66 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.13

01-186

Function test: Traction control button; set measurement range on VAG1526: 20 V =
Test step
VAG
1598
sockets Test of
Test requirements
- Additional work
steps Specified
value Corrective action
11 19 + 31 Function of
traction control
button Ignition switched
on.
Continuation:
- Traction control
button not pressed 0.0 -0.5 V

- Traction control
button pressed 10.0 - 14.5
V
Electrical Wiring Diagrams,
Troubleshooting & Component Locations
- Check wire from terminal 19 to Ground
(GND).
- Check wire from terminal 31 to traction
control button, terminal 6.
- Check voltage supply from terminal 5
of traction control button to terminal 15.
- If no malfunctions can be found using
the procedures in these steps, replace
the traction control button.
Pa
ge 41 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