1997 AUDI A4 ABS Bosch 5.0 Workshop Manual

45-14


EDL suction control was introduced on models with all wheel drive from
05.95. This system reduces the control noises during an EDL control
cycle.
The pressure dampers threaded into the hydraulic unit ( Fig. 2
arrows)
previously used to reduce working noises have been discontinued. The
working range of the pressure limiting valve in the hydraulic unit is raised
from 90 25 bar (1323 368 psi) to 170 25 bar (2499 368 psi).
Connector coding eliminates the risk of incorrectly connecting the
hydraulic unit. Fig. 3 Brake line connections at the hydraulic unit for ABS/EDL,
all-wheel-drive models, suction control (05.95 )
1 - Brake line tightening torque: 15 Nm (11 ft lb)
Pressure damper discontinued. The brake line is now the same
length as for FWD.
4 - Brake line tightening torque: 15 Nm (11 ft lb)
Pressure damper discontinued. The brake line is now the same
length as for FWD.
Pa
ge 9 of 12 Anti-lock Brake S
ystem
(ABS
), Bosch 5.0
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU03.45.2

45-15


ABS hydraulic unit mounting bracket,
removing and installing

1 -
Angle bracket
2 -
Bearing bushing
3 -
Buffer
4 -
Mounting bracket for ABS hydraulic unit
5 -
Washer
6 -
Bolt and washer assembly
10 Nm (7 ft lb)
Pa
ge 10 of 12 Anti-lock Brake S
ystem
(ABS
), Bosch 5.0
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU03.45.2

45-16


7 -
Brake line
ABS hydraulic unit to left-rear brake caliper
8 -
Brake line ABS hydraulic unit to right-rear brake
caliper
9 -
Brake line ABS hydraulic unit to left-front brake caliper
10 -
Fixture
11 -
Bolt and washer assembly 10 Nm (7 ft lb)
Pa
ge 11 of 12 Anti-lock Brake S
ystem
(ABS
), Bosch 5.0
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU03.45.2

45-17

ABS control module (ABS/EDL or ASR),
removing and installing


Location:
Under rear seat, left side

- Switch ignition off when removing and
installing.

- Lift rear seat out of its fixtures.

- Remove both securing bolts (arrows).

- Release harness connector (arrow) and separate from ABS control
module -J104-.
- Install in reverse order of removal.
Pa
ge 12 of 12 Anti-lock Brake S
ystem
(ABS
), Bosch 5.0
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU03.45.2