1999 AUDI A4 wiring

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

01-353
Continuation: 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 + 42 Function of brake light
switch -F-(Brake test
switch)
Brake pedal not
depressed
- Operate brake
pedal. 10.0 to 14.5
V

0.0 to 1.0 V Electrical Wiring Diagrams,
Troubleshooting & Component
Locations
Repair Manual, Brake System,
Repair Group 45
- Check wiring from terminal 42 to
terminal 15 via fuse (10A).
- Adjust brake light switch -F-.
Pa
ge 63 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

01-355
Continuation: 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-

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 Ground (GND) to parking brake
warning light switch -F9-.
- If no malfunction could be determined
using the procedures in these steps, replace
the parking brake warning light switch -F9-.
Pa
ge 65 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