1998 VOLKSWAGEN JETTA Service Manual

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To test component

Voltage signal of right rear ABS wheel speed sensor -G44-
- Perform test step 11
Voltage signal of rear left ABS wheel speed sensor -G46-
- Perform test step 12
Coding bridge
- Perform test step 13
Voltage supply for V.A.G 1551, T16 connector
- Perform test step 14
Resistance of K wire for On Board Diagnostic (OBD), T16 connector
- Perform test step 15
Function of ABS warning light -K47-
- Perform test step 16
Function of warning light for brake system -K118-
- Perform test step 17
Function of ABS hydraulic pump -V64-
- Perform test step 18
Check of data bus wiring
- Perform test step 19
Activation of longitudinal acceleration sensor -G251-
1)
- Perform test step 20
Function of ESP Control lamp -K155-
- Perform test step 21
1) All-wheel drive vehicles with Haldex coupling only.
Стр. 9из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

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Test table
Notes on test table

The socket designations of adapter V.A.G 1598/21 are identical to the control module -J104
contact designations in wiring diagram.
Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
If the readings obtained deviate from the specifications, carry out repair measure in the
right-hand part of the table.
Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
Continuity checks with adapter set V.A.G 1594 A (bridging).

If the measured figures only deviate slightly from the specifications, clean sockets and
connectors of the testers and adapter cables (with contact spray G 000 700 04 ) and repeat
check. Before replacing components, check wiring and connections and also, particularly for
specifications of less than 10 , repeat resistance check on the component.
Стр. 10из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

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Switch to measuring range:
Voltage measurement (20 V =)
Test
step V.A.G
1598
sockets Item tested
Test
conditions
- Additional
operations Specification
Measures for
deviations from
specification
1 8 + 25 Voltage supply
for ABS hydraulic
pump -V64- to
ABS Control
Module (w/EDL) -
J104-
Ignition
switched
off 10.0 to 14.5
V
Electrical Wiring
Diagrams,
Troubleshooting &
Component Locations
binder - Check wire using
wiring diagram
2 9 + 24 Voltage supply
for the valves in
ABS hydraulic
unit -N55- to ABS
Control Module
(w/EDL) -J104- Ignition
switched
off 10.0 to 14.5
V
Electrical Wiring
Diagrams,
Troubleshooting &
Component Locations
binder - Check wire using
wiring diagram
Стр. 11из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

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Switch to measuring range:
Voltage measurement (20 V =)
Test
step V.A.G
1598
sockets Item tested
Test
conditions
- Additional
operations Specification
Measures for
deviations from
specification
3 8 + 4 Voltage supply
(terminal X) to
ABS Control
Module
(w/EDL) -
J104-
Ignition
switched on10.0 to 14.5 V
Electrical Wiring
Diagrams,
Troubleshooting &
Component Locations
binder - Check wire using
wiring diagram
4 8 + 18 Function of
brake light
switch -F- Ignition
switched off
Brake pedal
not
depressed
0.0 to 0.5 V
Electrical Wiring
Diagrams,
Troubleshooting &
Component Locations
binder - Check brake light
switch -F- and Read
measured value
block, display group
003
- Check wiring using
wiring diagram

- Press brake
pedal approx. battery
voltage - Checking brake light
switch -F- Page 01
-
131
Стр. 12из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

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Switch to measuring range:
Resistance measurement (2 k )
Test
step V.A.G
1598
sockets Item tested Test
conditions
- Additional
operations Specification
Measures for
deviations from
specification
5 19 + 20 Resistance of
right front ABS
wheel speed
sensor -G45-
Ignition
switched
off 1.0 to 1.3 k
Electrical Wiring
Diagrams,
Troubleshooting &
Component Locations
binder
If no malfunction can be
located in the wiring:
Repair Manual, Brake
System, Repair Group
45; Removing and
installing parts of ABS
system on front and rear
axles - Separate connector on
right front ABS wheel
speed sensor -G45-
- Check wiring using
wiring diagram
- Wiggle wiring during
test
- Replace right front
ABS wheel speed
sensor -G45-
Стр. 13из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

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Switch to measuring range:
Resistance measurement (2 k )
Test
step V.A.G
1598
sockets Item tested Test
conditions
- Additional
operations Specification
Measures for
deviations from
specification
6 1 + 2 Resistance of
left front ABS
wheel speed
sensor -G47-
Ignition
switched
off 1.0 to 1.3 k
Electrical Wiring
Diagrams,
Troubleshooting &
Component Locations
binder
If no malfunction can be
located in the wiring:
Repair Manual, Brake
SystemRepair Group 45;
Removing and installing
parts of ABS system on
front and rear axles - Separate connector on
left front ABS wheel
speed sensor -G47-
- Check wiring using
wiring diagram
- Wiggle wiring during
test
- Replace left front ABS
wheel speed sensor -
G47-
Стр. 14из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

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Switch to measuring range:
Resistance measurement (2 k )
Test
step V.A.G
1598
sockets Item tested Test
conditions
- Additional
operations Specification
Measures for
deviations from
specification
7 22 + 23 Resistance of
right rear ABS
wheel speed
sensor -G44-
Ignition
switched
off 1.0 to 1.3 k
Electrical Wiring
Diagrams,
Troubleshooting &
Component Locations
binder
If no malfunction can be
located in the wiring:
Repair Manual, Brake
System, Repair Group
45; Removing and
installing parts of ABS
system on front and rear
axles - Separate connector on
right rear ABS wheel
speed sensor -G44
- Check wiring using
wiring diagram
- Wiggle wiring during
test
- Replace right rear ABS
wheel speed sensor -
G44-
Стр. 15из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

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Switch to measuring range:
Resistance measurement (2 k )
Test
step V.A.G
1598
sockets Item tested Test
conditions
- Additional
operations Specification
Measures for
deviations from
specification
8 5 + 6 Resistance of
left rear ABS
wheel speed
sensor -G46-
Ignition
switched
off 1.0 to 1.3 k
Electrical Wiring
Diagrams,
Troubleshooting &
Component Locations
binder
If no malfunction can be
located in the wiring:
Repair Manual, Brake
System, Repair Group
45; Removing and
installing parts of ABS
system on front and rear
axles - Separate connector on
left rear ABS wheel
speed sensor -G46-
- Check wiring using
wiring diagram
- Wiggle wiring during
test
- Replace left rear ABS
wheel speed sensor -
G46-
Стр. 16из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check