1997 AUDI A4 ignition

01-84

Function test and check for proper seal
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified value
Corrective action
17 Bridge
1 + 2,
7 + 37,
37 + 28
ABS return
flow pump -
V39-
Left front
traction
control
switch-over
valve -N168-
Left front
traction
control outlet
valve -N169- Repair Manual,
Brake System, Repair Group 47
- Connect VAG1310A
pressure gauge to front
left brake caliper and
bleed.
- Bridge terminals 3 +
28
Repair Manual, Brake System,
Repair Group 45
- ABS return flow pump
malfunctioning, replace ABS
hydraulic unit -N55-


Pressure
relief valve in
ABS hydraulic
unit -N55-
Left front ABS
outlet valve -
N102- - Switch on ignition for
max. 10 seconds and
switch off again.
Left front
traction control
switch-over
valve -N168-
switched ABS return
flow pump -
V39- runs Pressure on
pressure - Check left front traction control
switch-over valve -N168- and left
front traction control outlet valve -
N169- via resistance test test steps
5 + 6. Replace ABS hydraulic unit -
N55- if malfunctioning.
Pa
ge 35 of 79 Read Measurin
g Value Block
(function 08
)
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pair&id=AUDI.B5.SU02.01.8

01-85

Function test and check for proper seal
Test step
VAG
1598/20
sockets Test of
Test requirements
- Additional work
steps Specified value
Corrective action
17

Continuation:

Right rear
ABS
outlet
valve -
N135- - Bridge terminals 4 +
28
- Switch on ignition for
max. 10 seconds and
switch off again.
Front Wheel Drive
(FWD):
170 25 bar
All-Wheel Drive
(AWD), pressure
regulation (ABS):
90 25 bar
Left front
traction control
outlet valve -
N169- switchedPressure
increases on
pressure
gauge:
- Pressure relief valve and/or left
front ABS outlet valve -N102-
and/or right rear ABS outlet valve
-N135- malfunctioning. Replace
ABS hydraulic unit -N55-.

- Remove VAG1310A
pressure gauge and
bleed brakes All Wheel Drive
(AWD), throttle
valve regulation:
170 25 bar

Pa
ge 37 of 79 Read Measurin
g Value Block
(function 08
)
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yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-86

Function test and check for proper seal
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified value
Corrective action
18 Bridge
1 + 2,
7 + 37,
37 + 28
ABS return
flow pump -
V39-
Right front
traction
control
switch-over
valve -N166-
Right front
traction
control outlet
valve -N167- Repair Manual, Brake
System, Repair Group 47
- Connect VAG1310A
pressure gauge to front
RIGHT brake caliper
and bleed.
- Bridge terminals 55 +
28
Repair Manual, Brake System,
Repair Group 45
- ABS return flow pump
malfunctioning, replace ABS
hydraulic unit -N55-


Pressure
relief valve in
ABS hydraulic
unit -N55-
Right front
ABS outlet
valve -N100- - Switch on ignition for
max. 10 seconds and
switch off again.
Right front
traction control
switch-over
valve -N166-
switched ABS return
flow pump -
V39- runs Pressure on
pressure - Check right front traction control
switch-over valve -N166- and right
front traction control outlet valve -
N167- via resistance test test
steps 5 + 6. Replace ABS hydraulic
unit -N55- if malfunctioning.
Pa
ge 39 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-87

Function test and check for proper seal
Test step
VAG
1598/20
sockets Test of
Test requirements
- Additional work
steps Specified value
Corrective action
18

Continuation:

Left rear
ABS
outlet
valve -
N136- - Bridge terminals 27
+ 28
- Switch on ignition for
max. 10 seconds and
switch off again.
Front Wheel Drive
(FWD):
170 25 bar
All-Wheel Drive
(AWD), pressure
regulation (ABS):
90 25 bar
Right front
traction control
outlet valve -
N167- switchedPressure
increases on
pressure
gauge:
- Pressure relief valve and/or right
front ABS outlet valve -N100-
and/or left rear ABS outlet valve -
N136- malfunctioning. Replace
ABS hydraulic unit -N55-.

- Remove VAG1310A
pressure gauge and
bleed brakes All Wheel Drive
(AWD), throttle
valve regulation:
170 25 bar

Pa
ge 41 of 79 Read Measurin
g Value Block
(function 08
)
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-88

Function test: ABS warning light -K47-
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified
value Corrective
action
19 - 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.
Test step 19: Continued on
next page.
Pa
ge 43 of 79 Read Measurin
g Value Block
(function 08
)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-89

Function test: ABS warning light -K47-
Test step
VAG
1598/20
sockets Test of
Test
requirements
- Additional work
steps Specified value
Corrective action
19

Continuation: - Function of
ABS
warning
light -K47- - Switch on
ignition ABS warning
light -K47- lights
up for two (2)
seconds and
then goes out.
Electrical Wiring Diagrams,
Troubleshooting & Component Locations - 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).
- 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+ and open
circuit.

Repair Manual, Electrical Equipment,
Repair Group 90; Instrument cluster
- Are both the vehicle voltage and the
wiring from terminal 32 of ABS control
module -J104- to the instrument cluster
OK? Malfunction in instrument cluster. Pa
ge 44 of 79 Read Measurin
g Value Block
(function 08
)
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-90

Function test: Red brake warning symbol
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified
value Corrective
action
20 - Function of red "brake
system malfunction"
symbol
Repair Manual, Brake System, Repair
Group 47

Brake fluid level is OK Function of ABS warning light -K47-
already checked in step 19. Multi-pin connector connected to ABS
control module -J104- and retainer
catch engaged. Switch on ignition
Test step 20: Continued on
next page.
Pa
ge 45 of 79 Read Measurin
g Value Block
(function 08
)
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8

01-92

Function test: Traction control indicator light -K86-. This is only installed if vehicle is equipped with ASR.
Test
step VAG
1598/20
sockets Test of
Test requirements
- Additional work stepsSpecified
value Corrective
action
21 - Function of traction
control indicator light -
K86- 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.
Test step 21: Continued on
next page.
Pa
ge 47 of 79 Read Measurin
g Value Block
(function 08
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.SU02.01.8