1998 VOLKSWAGEN JETTA Service Manual

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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

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Vehicle Diagnosis, Testing and
Information System VAS 5051,
connecting and selecting ABS
control module

All functions which could previously be
performed with V.A.G 1551 can also be
performed with the new tester VAS 5051 in
the operating mode "Vehicle On Board
Diagnostic":
Operating instructions for Vehicle
Diagnosis, Testing and Information System
VAS 5051.

Special tools and equipment
VAS 5051 Vehicle Diagnosis, Testing
and Information System
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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:
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Indicated on display
Select operating mode:
- Press button on display for "Vehicle On
Board Diagnostic" -arrow-.
Indicated on display
Select vehicle system:
- Press "03 - Brake electronics" on display
-arrow-.
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Displayed is
e.g. (1J0 907 379 D)
Allocation of control module see Parts
catalog
Electrical Wiring Diagrams,
Troubleshooting & Component Locations
binder
Coding control module Page 01
-58
Operating instructions for Vehicle
Diagnosis, Testing and Information System
VAS 5051.
The control module identification
number.
System designation (ABS 20 IE)
Data BUS present. (CAN)
Control module code (03504).
Workshop code
Indicated on display
Select diagnostic function:
At this point all diagnostic functions are
available.
For further measures see repair
procedures.
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Diagnostic Trouble Code (DTC) table
Note on DTC table:

When beginning OBD of the vehicle control modules, always start with function "Automatic
test sequence" by pressing keys 0 and 0 because the control modules are interconnected
with a data bus wire. This checks the DTC memories of the control modules in the vehicle.

All the possible DTCs which can be recognized by the ABS control module -J104- and
printed-out on V.A.G 1551 or VAS 5051, are listed on the following pages according to the
5-digit DTC.

DTC appears (in the "Rapid data transfer" mode) only on the print-out.
Example:


DTC P code DTC type code
5-digit 5-digit 3-digit
18256 P1848 035

The 5-digit P code which may appear next to the DTC, is for use with the On Board
Diagnostic (OBD) II and may be disregarded.

The 3-digit DTC type code is a data code and may be disregarded, but the DTC type text is
of use.

Before replacing components indicated as being faulty, check all the appropriate
connectors, wiring and Ground connections using the wiring diagram
Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
On completion of repairs always check the DTC memory with V.A.G 1551 Scan Too. or the
tester VAS 5051 and erase.

Carry out road test exceeding 20 km/h (13 mph).

After the road test check DTC memory again.
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V.A.G 1551
print-out Possible cause
Repair
No DTC
recognized If "No DTC recognized" appears after carrying out repairs, On Board
Diagnostic (OBD) is ended.
If, despite "No DTC recognized" appearing in the display, the ABS system
does not function properly, then proceed as follows:
1. Carry out road test exceeding 20 km/h (13 mph),
2. Again check DTC memory, if there is still no DTC stored,
3. Continue troubleshooting without OBD and work through the complete
Electrical check Page 01
-102 .
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01-37


V.A.G 1551
print-out Possible cause

Repair
00283
Left front
ABS wheel
speed
sensor -
G47-
Open circuit, shor
t to positive or
Ground, or loose contact in
connections betwe en left front ABS
wheel speed sens or -G47- and
ABS Control Mo dule (w/EDL) -
J104- - Check wiring and
connections using
wiring diagram
- Perform electrical checks from
Page 01
-102
Damaged rotor or left front ABS
wheel speed sensor -G47

Left front ABS whee l speed sensor
windings -G47- faulty - Check left front
ABS wheel speed
sensor -G47- and rotor for damage
- Replace rotor/speed sensor -G47-
Repair Manual, Brake System,
Repair Group 45; Removing and
installing parts of ABS system on front
and rear axles
If the malfuncti on 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 mo dule and hydraulic
unit
- Replace ABS Control Module
(w/EDL) -J104-
Стр. 17
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ABS ITT Mk 20 IE On Board Diagnostic (OBD) program
Volkswagen Technical Site: http://v olkswagen.msk.ru http://vwts.info http://vwts.ru
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