1999 AUDI A4 ignition

01-350
Continuation: Voltage measurement; set measurement range on VAG1526: 20 V =
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified value
Corrective action
24 Bridge
7 + 28,
1 + 2
Function of
ABS return
flow pump
relay -J105-.
ABS return flow
pump relay -J105-
installed

- Use VAG1598/20 to
measure voltage
between terminals 20
and 29.
Voltage should be
between 10.5 to
14.5 V between
terminals 20 and
29.

- Switch on ignition for
max. 10 seconds and
switch off again. ABS return flow
pump -V39- runs - If you do not measure any
voltage between terminals 20
and 29, replace the relay.
- If you measure voltage
between terminals 20 and 29,
the ABS return flow pump is
malfunctioning. Replace ABS
hydraulic unit -N55-.
Pa
ge 60 of 65 Electronic Stabilization Pro
gram
(ESP
), electrical testin
g
11/20/2002 htt
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.16

01-352

Voltage measurement; set measurement range on VAG1526: 20 V =
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work
steps Specified
value Corrective action
26 28 + 48 Function of brake
light switch -F- Ignition switched
off
- Check wire from terminal 28 to
Ground (GND).
Brake pedal not
depressed
- Operate brake
pedal. 0.0 to 1.0 V

10.0 to 14.5
V Electrical Wiring Diagrams,
Troubleshooting & Component
Locations
Repair Manual, Brake System,
Repair Group 45
- Check wiring from terminal 48 to
terminal 30 via fuse (10A).
- Adjust brake light switch -F-.

See continuation on next page
Pa
ge 62 of 65 Electronic Stabilization Pro
gram
(ESP
), electrical testin
g
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.16

01-354

Voltage measurement; set measurement range on VAG1526: 20 V =
Test
step VAG
1598/20
sockets Test of
Test
requirements
- Additional work
steps Specified
value Corrective action
27 1 + 76 Function of parking
brake warning light
switch -F9- Ignition switched
on.
- Check wiring from terminal 1 to terminal
15 via fuse (10A).
Parking brake
not engaged
- Set parking brake0.0 to 1.0
V

10.0 to 14.5
V Electrical Wiring Diagrams,
Troubleshooting & Component Locations - Check wiring from terminal 76 to parking
brake warning light switch -F9- for open
circuit or short circuit to B+.

See continuation on next page
Pa
ge 64 of 65 Electronic Stabilization Pro
gram
(ESP
), electrical testin
g
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.16