1996 AUDI A4 diagram

01-180

Function test: ABS/EDL warning light -K47-
Test step
VAG
1598
sockets Test of
Test
requirements
- Additional work
steps Specified value
Corrective action
8

Continuation: - Function of
ABS/EDL
warning light
-K47-. - Switch on
ignition ABS warning
light -K47- lights
up for two (2)
seconds and
then goes out.
Electrical Wiring Diagrams,
Troubleshooting & Component Locations - If ABS/EDL warning light does not come
on, check voltage of electrical system and
test wiring from terminal 21 of ABS control
module -J104- to instrument cluster for
short circuit to Ground (GND).
- The ABS/EDL warning lamp does not
switch off after 2 seconds. The red "brake
system malfunction" symbol lights up after
2 seconds. Check wire from terminal 21 of
ABS control module -J104- to instrument
cluster for short circuit to B+ and open
circuit.

Repair Manual, Electrical Equipment,
Repair Group 90.
- If vehicle voltage and wire from terminal
21 of ABS control module -J104- to
instrument cluster are OK there is a
malfunction in instrument cluster, LED or
bulb malfunctioning.
Pa
ge 35 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

01-184

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
)
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

01-186

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

01-194

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

00526
Brake light switch -F-
Open circuit

Both brake lights -M9- (left) and -
M10- (right) malfunctioning.
Wire from brake lights to control
module faulty.
ABS control module -J104-
malfunctioning
Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Check brake light switch, "Read measuring value
block", display group 2 page 01
-140
.
- Locate and repair open circuit or short circuit.
- Replace bulbs.
Pa
ge 53 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

01-195

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

00529
Wheel speed information
missing


This malfunction only
occurs if vehicle is
equipped with ASR. Data is transferred between the ABS
control module -J104- and the Engine
Control Module (ECM) via a single wire. For more information, see the section "Systems
related to ASR" page 01
-42
and the table
"Control module versions" page 01
-134
.
See continuation on next
page


Open circuit or short circuit to B+ or
Ground (GND) in wire between ABS
control module -J104- and Engine
Control Module (ECM). Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Locate and repair open circuit or short circuit.


Engine Control Module (ECM)
malfunctioning. - If the tachometer in the instrument cluster is
malfunctioning and no malfunctions can be found
in the wiring, the Engine Control Module (ECM)
is malfunctioning.

ABS control module -J104-
malfunctioning - If the tachometer in the instrument cluster
functions properly and no malfunctions can be
found in the wiring, the ABS control module
Pa
ge 54 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

01-197

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

00532
Voltage supply
Signal too small

Notes:

This malfunction affects the voltage supply
of the control module.
This DTC is only stored, if the malfunction
occurs at a vehicle speed above 6 km/h.
As soon as vehicle voltage is within the
valid voltage range again, the ABS/EDL or
ASR system is switched back on and the
warning lights turn off.
Open circuit or contact resistance
too high between voltage supply
from terminal 15 hydraulic control
unit, terminal 15. Voltage jumps in vehicle system.
Electrical Wiring Diagrams,
Troubleshooting & Component
Locations
Electrical Wiring Diagrams,
Troubleshooting & Component
Locations
Repair Manual, Electrical
Equipment, Repair Group 27.
- Carry out "Electrical test", step
1 page 01
-166
.
- Locate and repair open circuit
in voltage supply. - Check Generator (GEN) and
Voltage Regulator (VR). - Check battery

Malfunction in hydraulic control unit- If no malfunctions can be
found in the voltage supply,
replace hydraulic control unit.
Pa
ge 57 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

01-199

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

00623
ABS / transmission
electrical connection

This malfunction only
occurs if vehicle is
equipped with ASR. Data is transferred between the ABS control
module -J104- and the Transmission Control
Module (TCM) via a single wire. For more information, see the section
"Systems related to ASR" page 01
-42

and the table "Control module versions"
page 01
-134
.

Manual transmission


ABS/EDL/ASR control module -J104-
incorrectly coded.
Short circuit to B+
Electrical Wiring Diagrams,
Troubleshooting & Component Locations - Check coding of ABS/EDL/ASR control
module -J104- page 01
-135
.
- Locate and repair short circuit.

Automatic transmission


ABS/EDL/ASR control module -J104-
incorrectly coded.
Open circuit or short circuit to Ground (GND)
in wiring between ABS/EDL/ASR control
module -J104- and Transmission Control
Module (TCM) -J217-.
Electrical Wiring Diagrams,
Troubleshooting & Component Locations - Check coding of ABS/EDL/ASR control
module -J104- page 01
-135
.
- Locate and repair open circuit or short
circuit.
Pa
ge 59 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

01-200

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

00646
ABS-ASR motor electrical connection
1 Data is transferred between the ABS
control module -J104- and the Engine
Control Module (ECM) via a single wire. For more information, see the section
"Systems related to ASR" page 01
-
42
and the table "Control module
versions" page 01
-134
.
Note:
The following signals are sent from
the ABS control module (w/EDL) -
J104- to the Engine Control Module
(ECM) via this connection:
Open circuit or short circuit to B+ or
Ground (GND) in wiring between ABS
control module -J104- terminal 13 and
Engine Control Module (ECM).
Electrical Wiring Diagrams,
Troubleshooting & Component
Locations - Locate and repair open circuit or
short circuit.
MMD signal (Masked Misfire
Diagnostic) for On Board
Diagnostic (OBD)
SET signal (Specified Engine
Torque)
ABS/EDL/ASR control module -J104-
malfunctioning. - Replace ABS/EDL/ASR hydraulic
control unit.

ETR signal (Engine Torque
Reduction signal)
Engine Control Module (ECM)
malfunctioning. - Replace Engine Control Module
(ECM).
Pa
ge 60 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