1999 AUDI A4 wiring diagram

01-204

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

01200
Supply voltage for ABS valves

Note:
This malfunction affects the voltage
supply of the ABS hydraulic unit -N55-
and the motor for the ABS hydraulic
pump -V64-.
Open circuit or contact resistance too
high between voltage supply from
terminal 30 hydraulic control unit,
terminals 17 and 18. 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
2 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 64 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

01-205

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

01201
Supply voltage for ABS pump

Note:
This malfunction affects the Ground
(GND) supply of the motor for the
ABS hydraulic pump -V64-.
Open circuit or contact resistance too
high in Ground (GND) supply to
hydraulic control unit, terminal 16.
Electrical Wiring Diagrams,
Troubleshooting & Component Locations - Carry out "Electrical test", step 2
page 01
-166
. Check contact resistance
in the Ground (GND) supply.
- Locate and repair open circuit in
Ground (GND) supply.

Malfunction in hydraulic control unit - If no malfunctions can be found in the
voltage supply, replace hydraulic control
unit.
Pa
ge 65 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

01-206

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

01203
ABS / instrument cluster
electrical connection

Open circuit/short circuit
to Ground (GND)
Short circuit to Ground (GND) or open circuit in wire
between instrument cluster and hydraulic control
unit, terminal 10.
Electrical Wiring Diagrams,
Troubleshooting & Component
Locations - Check the wire for short circuit to
Ground (GND) and for open circuit.
Pa
ge 66 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