sensor VOLKSWAGEN JETTA 1998 Owner's Guide

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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

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Switch to measuring range:
Voltage measurement (2 V )
Test
step V.A.G
1598
sockets Item
tested Test
conditions
- Additional
operations Specification
Measures for deviations
from specification
9 19 + 20 Right front
ABS wheel
speed
sensor -
G45-
voltage
signal
Vehicle
raised
- Check installation of
right front ABS wheel
speed sensor -G45- and
rotor.


Ignition
switched off

- Rotate front
right wheel at
approx. 1
rev./sec. min. 65 mV
alternating
voltage - Check whether right
front ABS wheel speed
sensor -G45- has been
interchanged and Read
measured value block
Page 01
-61 , display
group number 001
10 1 + 2 Left front
ABS wheel
speed
sensor -
G47-
voltage
signal Vehicle
raised
- Check installation of left
front ABS wheel speed
sensor -G47- and rotor.


Ignition
switched off

- Rotate front
left wheel at
approx. 1
rev./sec. min. 65 mV
alternating
voltage - Check whether left front
ABS wheel speed sensor
-G47- has been
interchanged and Read
measured value block
Page 01
-61 , display
group number 001
Стр. 17из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

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Switch to measuring range:
Voltage measurement (2 V )
Test
step V.A.G
1598
sockets Item
tested Test
conditions
- Additional
operations Specification
Measures for deviations
from specification
11 22 + 23 Right rear
ABS wheel
speed
sensor -
G44-
voltage
signal
Vehicle
raised
- Check installation of
right rear ABS wheel
speed sensor -G44- and
rotor.


Ignition
switched off

- Rotate rear
right wheel at
approx. 1
rev./sec. min. 190 mV
alternating
voltage - Check whether right
rear ABS wheel speed
sensor -G44- has been
interchanged and Read
measured value block
Page 01
-61 , display
group number 001
12 6 + 5 Left rear
ABS wheel
speed
sensor -
G46-
voltage
signal Vehicle
raised
- Check installation of left
rear ABS wheel speed
sensor -G46- and rotor.


Ignition
switched off

- Rotate rear
left wheel at
approx. 1
rev./sec. min. 190 mV
alternating
voltage - Check whether left rear
ABS wheel speed sensor
-G46- has been
interchanged and Read
measured value block
Page 01
-61 , display
group number 001
Стр. 18из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

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Functional check: Warning light for brake system -K118-
Test
step V.A.G
1598
sockets Item
tested
Test
conditions
- Additional
operations Specification
Measures for
deviations from
specification
17 - Function of
warning
light for
brake
system -
K118-
Brake fluid
level is OK.

Switch
ignition on Warning light for
brake system -
K118- lights up for
approx. 2 seconds
and goes out again
Electrical Wiring
Diagrams,
Troubleshooting &
Component
Locations binder - Check brake fluid
level warning
switch -F34- in
sealing cap

- Pull
connectors off
both front speed
sensors
- Start engine
and run at more
than 2000 rpm Warning light -
K118- lights up and
3 warnings are
sounded
Electrical Wiring
Diagrams,
Troubleshooting &
Component
Locations binder
Repair Manual,
Body Interior,Repair
Group 70 - Check wiring
using wiring
diagram
- Malfunction in
instrument cluster

- Reconnect
connectors to
both front speed
sensors again
- Check DTC
memory and
erase
Стр. 23из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

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Switch to measuring range:
Resistance measurement (200 /20 M )
Test
step V.A.G
1598
sockets Item tested Test conditions
- Additional
operations Specification
Measures for
deviations from
specification
20 -
Longitudinal
acceleration
sensor -
G251- wiring
Ignition switched
off
Select 200
measuring range
- Disconnect
connector for
longitudinal
acceleration sensor -
G251-
- Disconnect multi-pin
connector T25 from
ABS control module
(w/EDL) -J104-
- Connect test box
V.A.G 1598/21

- Check wiring
between multi-pin
connector for
longitudinal
acceleration sensor -
G251- and multi-pin
connector for ABS
control module
(w/EDL) -J104- for
open circuit max. 1.5
Electrical Wiring
Diagrams,
Troubleshooting &
Component
Locations binder - Check wiring
using wiring
diagram
Test step 20: Continued on next
page.
Стр. 27из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

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Function
As the control modules are interconnected with
a data bus wire, always start troubleshooting by
the Diagnostic Trouble Code (DTC) memories
of all the control modules in the vehicle.
This occurs in "Automatic test sequence" and is
activated with key function 00.
When doing this, check to see if there are
DTCs stored which may influence the ABS.
The On Board Diagnostic (OBD) relates to the
electrical/electronic part of the ABS, in other
words only malfunctions via the electrical
connection to the control module are
recognized (e.g. speed sensor open circuit).
The 47 pin ABS Control Module (w/EDL) -J104-
forms with the hydraulic unit a compact unit.
The unit is located on the left of the engine
compartment. The control module is equipped
with a DTC memory. The Data Link Connector
(DLC) is located in the center console below
the heating/air conditioning controls.
The control module recognizes malfunctions
during vehicle operation and stores them in a
permanent memory, the contents of which
remain even during periods of no battery
voltage.
Стр. 2из 10 ABS Mark 60 On Board Diagnostic (OBD), vehicles from my 10.00

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Sporadic (irregular) malfunctions will also be
recognized and stored. But if malfunctions
affecting the data bus system do not occur again
within the next 15 vehicle start and driving off
sequences, or other malfunctions within the next
50 vehicle start and driving off sequences, they
will be erased from DTC memory except for the
malfunction "Control module faulty" (forget-
malfunction counter).
After switching on the ignition and/or starting the
engine, the ABS warning light -K47- and the ESP
control lamp -K155- will light up for approx. 2
seconds.
During this period a test sequence (self-check) is
run in the control module for the following
functions:

To check if the supply voltage is at least 10.0
Volt,

To check control module including the valve
windings,

To check the coding of the control module,

A static check of the speed sensor (no speed
signal),

If the wheel speed signal is not OK after the car
has been driven and a speed of approx. 20
km/h (approx. 13 mph) has been exceeded, the
ABS warning light -K47- will light up again.
Стр. 3из 10 ABS Mark 60 On Board Diagnostic (OBD), vehicles from my 10.00