1998 VOLKSWAGEN JETTA ignition

Downloaded from www.Manualslib.com manuals search engine 01-29



- Switch off ignition and disconnect tester at
DLC.
Work sequence if a DTC has been detected:
1. Repair according to DTC table, Page 01
-
35
2. Check DTC memory (Function 02)
3. Erase DTC memory (Function 05)
4. End output (Function 06)
5. Perform a test drive
6. Check DTC memory again
Стр. 9из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

Downloaded from www.Manualslib.com manuals search engine 01-30


Automatic test sequence
The automatic test sequence checks all the
Diagnostic Trouble Code (DTC) memories
of the control modules.

- Switch ignition on.
V.A.G - On Board Diagnostic HELP
1 - Ra
pid data transfer1)
2 - Blink code output1)
Indicated on display
1) Is displayed alternately
- Press key -1- for "Rapid data transfer"
operating mode.
- Switch on printer with the Print key
(indicator lamp in key lights up).
Rapid data transfer HELP
Select function XX Indicated on display
- Press key -0- twice; 00 enters "Automatic
test sequence" function.
- Confirm entry with Q key.
1J0 907 379 D ABS 20 IE CAN0001
Coding 03604 WSC XXXXX
The V.A.G 1551 Scan Tool display will
show the control module identification, e.g.:
Thereafter all control module
identifications with eventual DTC
memory entries are displayed
Стр. 10из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

Downloaded from www.Manualslib.com manuals search engine 01-32



Note:

The ABS function is switched off in the control
module during the On Board Diagnostic.

The DTC memory can be erased after
successful checking and repair.

Note:
Operating instructions for Vehicle Diagnosis,
Testing and Information System VAS 5051. - Pull cover -1- off in direction of -arrow-.
- With ignition switched off, connect tester VAS
5051 to diagnosis connection using diagnosis
cable VAS 5051/1 or VAS 5051/3.
In the functions 04 - Basic setting/08 - Read
Measured value block, the display zones will b
e
listed from top to bottom.
If the display does not indicate as described in
the work sequence:
Стр. 12из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

Downloaded from www.Manualslib.com manuals search engine 01-38


V.A.G 1551
print-out Possible cause
Repair
00283
Left front ABS
wheel speed
sensor -G47-
Signal outside
tolerances
1)
Open circuit, short to positive or
Ground, or loose contact in
connections between left front ABS
wheel speed sensor -G47- and ABS
Control Module (w/EDL) -J104- - Check wiring and
connections using wiring
diagram
- Perform electrical checks
from Page 01
-102

Electrical interference from other
sources (high frequency radiation e.g.
non-insulated ignition cable) - Read measured value block
Page 01
-61 Display group
number 001

Damaged rotor or left front ABS wheel
speed sensor -G47-


Excessive air gap between left front
ABS wheel speed sensor-G47- and
rotor (signal not OK.)
Repair Manual, Brake
System, Repair Group 45;
Removing and installing parts
of ABS system on front and
rear axles - Check left front ABS wheel
speed sensor -G47- and rotor
for damage
- Replace rotor/speed sensor
1) Type of DTC, this DTC is only recognized above 20 km/h (13 mph) (carry out test drive).
Стр. 18из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

Downloaded from www.Manualslib.com manuals search engine 01-41


V.A.G 1551
print-out Possible cause
Repair
00285
Right front ABS
wheel speed
sensor -G45-
Signal outside
tolerances
1)
Open circuit, short to positive or
Ground, or loose contact in
connections between right front ABS
wheel speed sensor -G45- and ABS
Control Module (w/EDL) -J104- - Check wiring and
connections using wiring
diagram
- Perform electrical checks
from Page 01
-102

Electrical interference from other
sources (high frequency radiation e.g.
non-insulated ignition cable) - Read measured value block
Page 01
-61 Display group
number 001

Damaged rotor or right front ABS
wheel speed sensor -G45-


Excessive air gap between right front
ABS wheel speed sensor-G45- and
rotor (signal not OK)
Repair Manual, Brake
System, Repair Group 45;
Removing and installing parts
of ABS system on front and
rear axles - Check right front ABS wheel
speed sensor -G45- and rotor
for damage
- Replace rotor/speed sensor
1) Type of DTC, this DTC is only recognized above 20 km/h (13 mph) (carry out test drive).
Стр. 21из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

Downloaded from www.Manualslib.com manuals search engine 01-44


V.A.G 1551
print-out Possible cause
Repair
00287
Right rear ABS
wheel speed
sensor -G44-
Signal outside
tolerances
1)
Open circuit, short to positive or
Ground, or loose contact in
connections between right rear ABS
wheel speed sensor -G44- and ABS
Control Module (w/EDL) -J104- - Check wiring and
connections using wiring
diagram
- Perform electrical checks
Page 01
-102

Electrical interference from other
sources (high frequency radiation e.g.
non-insulated ignition cable) - Read measured value block
Page 01
-61 Display group
number 001

Damaged rotor or right rear ABS
wheel speed sensor -G44-


Excessive air gap between right rear
ABS wheel speed sensor -G44- and
rotor (signal not OK.)
Repair Manual, Brake
System, Repair Group 45;
Removing and installing parts
of ABS system on front and
rear axles - Check right rear ABS wheel
speed sensor -G44- and rotor
for damage
- Replace rotor/speed sensor
1) Type of DTC, this DTC is only recognized above 20 km/h (13 mph) (carry out test drive).
Стр. 24из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

Downloaded from www.Manualslib.com manuals search engine 01-47


V.A.G 1551
print-out Possible cause
Repair
00290
Left rear ABS
wheel speed
Sensor -G46-
Signal outside
tolerances
1)
Open circuit, short to positive or
Ground, or loose contact in
connections between left rear ABS
wheel speed sensor -G46- and ABS
Control Module (w/EDL) -J104- - Check wiring and
connections using wiring
diagram
- Perform electrical checks
Page 01
-102

Electrical interference from other
sources (high frequency radiation e.g.
non-insulated ignition cable) - Read measured value block
Page 01
-61 Display group
number 001

Damaged rotor or left rear ABS wheel
speed sensor -G46-


Excessive air gap between left rear
ABS wheel speed sensor -G46- and
rotor (signal not OK.)
Repair Manual, Brake
System, Repair Group 45;
Removing and installing parts
of ABS system on front and
rear axles - Check left rear ABS wheel
speed sensor -G46- and rotor
for damage
- Replace rotor/speed sensor
1) Type of DTC; this DTC is only recognized above 20 km/h (13 mph) (carry out test drive).
Стр. 27из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

Downloaded from www.Manualslib.com manuals search engine 01-50


V.A.G 1551
print-out Possible cause
Repair
01130
ABS
operation
Implausible
signal
1)
Electrical interference from
other sources (high
frequency radiation e.g.
non-insulated ignition cable)- Erase DTC memory
- Perform test drive at more than 20 km/h
(13 mph)
- Check DTC memory again


Open circuit, short to
positive or Ground in the
wiring - Check wiring and connections using wiring
diagram
- Perform electrical checks Page 01
-102
If the malfunction occurs again:


ABS Control Module
(w/EDL) -J104- faulty
Repair Manual, Brake System, Repair
Group 45; Hydraulic unit, brake
booster/brake master cylinder - Assembly
overview; Removing and installing control
module and hydraulic unit - Replace ABS control module (w/EDL) -
J104-
1) Type of DTC; this DTC is only recognized above 20 km/h (13 mph) (carry out test drive).
Стр. 30из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program