ABS AUDI A4 1999 B5 / 1.G Brakes ESP Electrical Testing Owner's Manual

01-324
Continuation: Function test
Test
step VAG
1598/20
sockets Test of
Test
requirements
- Additional work
steps Specified value
Corrective action
13
1)
Bridge
1 + 2,
28+37
2)
28+36 3) Inlet valve -N101 and
front left brake line
connection
- If all wheels are blocked, inlet
valve is malfunctioning DTC
table, DTC 00257.

- Remove bridge
The left-front
wheel remains
locked.

- Release brake
pedal.
Outlets on ABS control module -J104- differ depending on installed equipment
1) This test step requires two technicians. 2) Vehicles with control module 4B0 907 389
Pa
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yp
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pair&id=AUDI.B5.SU02.01.16

01-325

Function test
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified
value Corrective action
14
1)
Bridge
1 + 2,
28+37
2)
28+36 3) Inlet valve -N99-
and front right
brake line
connection
Ignition on

- for vehicles with
automatic transmission,
engage neutral position
"N"
- Bridge terminals 26 +
28
- Depress brake pedal
and hold.
Right front
wheel can
be rotated
by hand - If the wheel does not rotate, check the
other wheels for free rotation. If yes, then
hydraulic brake lines are mixed-up
(switched). Check brake line connections
and coupling pieces. Make sure every
component is OK.

See continuation on next page
Outlets on ABS control module -J104- differ depending on installed equipment
1) This test step requires two technicians. 2) Vehicles with control module 4B0 907 389
Pa
ge 29 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

01-326
Continuation: Function test
Test
step VAG
1598/20
sockets Test of
Test
requirements
- Additional work
steps Specified value
Corrective action
14
1)
Bridge
1 + 2,
28+37
2)
28+36 3) Inlet valve -N99- and
front right brake line
connection
- If all wheels are blocked, inlet
valve is malfunctioning DTC
table, DTC 00259.

- Remove bridge
The right-front
wheel remains
locked.

- Release brake
pedal.
Outlets on ABS control module -J104- differ depending on installed equipment
1) This test step requires two technicians. 2) Vehicles with control module 4B0 907 389
Pa
ge 31 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

01-327

Function test
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified
value Corrective action
15
1)
Bridge
1 + 2,
28+37
2)
28+36 3) Inlet valve -
N134- and rear
left brake line
connection
Ignition on

- for vehicles with
automatic transmission,
engage neutral position
"N"
- Bridge terminals 53 +
28
- Depress brake pedal
and hold.
Left rear
wheel can
be rotated
by hand - If the wheel does not rotate, check the
other wheels for free rotation. If yes, then
hydraulic brake lines are mixed-up
(switched). Check brake line connections
and coupling pieces. Make sure every
component is OK.

See continuation on next page
Outlets on ABS control module -J104- differ depending on installed equipment
1) This test step requires two technicians. 2) Vehicles with control module 4B0 907 389
Pa
ge 33 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

01-328
Continuation: Function test
Test
step VAG
1598/20
sockets Test of
Test
requirements
- Additional work
steps Specified value
Corrective action
15
1)
Bridge
1 + 2,
28+37
2)
28+36 3) Inlet valve -N134- and
rear left brake line
connection
- If all wheels are blocked, inlet
valve is malfunctioning DTC
table, DTC 00274.

- Remove bridge
The left-rear
wheel remains
locked.

- Release brake
pedal.
Outlets on ABS control module -J104- differ depending on installed equipment
1) This test step requires two technicians. 2) Vehicles with control module 4B0 907 389
Pa
ge 35 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

01-329

Function test
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified
value Corrective action
16
1)
Bridge
1 + 2,
28+37
2)
28+36 3) Inlet valve -
N133- and rear
right brake line
connection
Ignition on

- for vehicles with
automatic transmission,
engage neutral position
"N"
- Bridge terminals 6 +
28
- Depress brake pedal
and hold.
Right rear
wheel can
be rotated
by hand - If the wheel does not rotate, check the
other wheels for free rotation. If yes, then
hydraulic brake lines are mixed-up
(switched). Check brake line connections
and coupling pieces. Make sure every
component is OK.

See continuation on next page
Outlets on ABS control module -J104- differ depending on installed equipment
1) This test step requires two technicians. 2) Vehicles with control module 4B0 907 389
Pa
ge 37 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

01-330
Continuation: Function test
Test
step VAG
1598/20
sockets Test of
Test
requirements
- Additional work
steps Specified value
Corrective action
16
1)
Bridge
1 + 2,
28+37
2)
28+36 3) Inlet valve -N133- and
rear right brake line
connection
- If all wheels are blocked, inlet
valve is malfunctioning DTC
table, DTC 00273.

- Remove bridge
The right-rear
wheel remains
locked.

- Release brake
pedal.
Outlets on ABS control module -J104- differ depending on installed equipment
1) This test step requires two technicians. 2) Vehicles with control module 4B0 907 389
Pa
ge 39 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

01-331

Function test: ABS warning light -K47-
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified
value Corrective
action
17 - Function of ABS
warning light -K47- DTC memory checked and no DTC present
in DTC memory of ABS control module -
J104-. Ignition switched off Multi-pin connector connected to ABS
control module -J104- and retainer catch
engaged.

See continuation on next page
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yp
e=re
pair&id=AUDI.B5.SU02.01.16

01-332
Continuation: Function test: ABS warning light -K47-
Test
step VAG
1598/20
sockets Test of
Test
requirements
- Additional work
steps Specified value
Corrective action
17 - Function of
ABS warning
light -K47- - Switch on
ignition ABS warning light -
K47- lights up for two
(2) seconds and then
goes out. - If ABS warning light does not come on,
check voltage of electrical system and test
wiring from terminal 32 of ABS control
module -J104- to instrument cluster for short
circuit to Ground (GND).

See continuation on next page
Pa
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), electrical testin
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yp
e=re
pair&id=AUDI.B5.SU02.01.16

01-333
Continuation: Function test: ABS warning light -K47-
Test
step VAG
1598/20
sockets Test of
Test
requirements
- Additional work
steps Specified
value Corrective action
17 - Function of
ABS warning
light -K47-
Electrical Wiring Diagrams, Troubleshooting &
Component Locations
Repair Manual, Electrical Equipment, Repair Group
90; Instrument cluster
- The ABS warning lamp does not switch off after 2
seconds. The red "brake system malfunction" symbol
lights up after 2 seconds. Check wire from terminal 32
of ABS control module -J104- to instrument cluster for
short circuit to B+ or open circuit.
- If voltage of electrical system is OK and wiring from
terminal 32 of ABS control module -J104- to instrument
cluster is intact there is a malfunction in instrument
cluster.
Pa
ge 43 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