AUDI A4 2000 B5 / 1.G Brakes Erase DTC Memory End Output User Guide

01-21

Only replace a malfunctioning component if you
are certain that all electrical wires to this
component are functioning properly. The lines
must work properly and be capable of carrying
all signals without any problems. Check the
lines for the following:

- Corrosion or loose connections in the
connectors or Ground straps. If there are bent,
broken, or corroded contacts on the
connectors, replace the contacts using
VAS1978 wiring harness repair kit.

- Open circuit in wiring

- Short circuits to B+ or Ground (GND)

Electrical Wiring Diagrams, Troubleshooting &
Component Locations

Welding work performed with electrical welding
equipment can affect the ABS/ESP system.
Pa
ge 11 of 15 Erase DTC Memor
y (function 05
), End Out
put
(function 06
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.2

01-22

Test requirements

Vehicle equipped with approved wheel and
tire sizes, which must be the same on all four
wheels. All tire inflation pressures checked
according to specification.
The mechanical/hydraulic components of the
brake system are OK. Hydraulic connections
and lines are sealed properly (visual check
at hydraulic unit, brake calipers, wheel
cylinders, tandem master brake cylinder).
Wheel bearings and wheel bearing play OK
Wheel speed sensors installed correctly

Repair manual, Brake System, Repair Group
45


Supply voltage OK (at least 10.0 volts).
Harness connector is properly connected at
ABS control module -J104-, locking
mechanism is engaged.

Pa
ge 12 of 15 Erase DTC Memor
y (function 05
), End Out
put
(function 06
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.2

The OBD sequence can only be started with
the vehicle stationary and the ignition
switched on (or with the engine running). It is
not possible to initiate On Board Diagnostic
(OBD) once wheel speed has reached 2.75
km/h.
Pa
ge 13 of 15 Erase DTC Memor
y (function 05
), End Out
put
(function 06
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.2

01-23

While testing the ESP system, make sure
that the vehicle's electrical system is not
subjected to electromagnetic interference;
keep the vehicle away from equipment with a
high current draw such as electric welding
units.

WARNING!

The diagnostic will not terminate at a speed
of v = > 20 km/h. Risk of accident!
Pa
ge 14 of 15 Erase DTC Memor
y (function 05
), End Out
put
(function 06
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.2

01-24

Technical information required


Valid wiring diagram

Electrical Wiring Diagrams, Troubleshooting &
Component Locations

Installation locations of electrical
components.

Repair manual, Brake System, Repair Group
45


Brake mechanical information

Repair manual, Brake System, Repair Group
46


Brake hydraulic information

Repair manual, Brake System, Repair Group
47

Pa
ge 15 of 15 Erase DTC Memor
y (function 05
), End Out
put
(function 06
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.2