1998 VOLKSWAGEN JETTA diagram

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ABS warning light -K47-

Electrical Wiring Diagrams,
Troubleshooting & Component Locations
binder
If the ABS warning light -K47- (-2-) does
not go out after switching ignition on and
completion of test sequence then the
malfunction may be:
-a- Voltage supply is below 10 Volts
-b- There is a malfunction in the ABS
The anti-locking brake system remains
switched off with an ABS malfunction -b-,
but the brake system remains fully
operational.
-c- Since the last time the vehicle was
started there was a temporary speed
sensor malfunction.
In the case of a sensor malfunction -c-,
the ABS warning light -K47- will
extinguish after restarting the engine and
attaining a speed of above 20 km/h
(approx. 13 mph).
-d- The connection from instrument cluster
to ABS control module (w/EDL) -J104- is
interrupted.
-e- Instrument cluster is faulty.
Стр. 12из 14 Electrical/electronic components and locations

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ABS warning lights -K47- and -K118-

Electrical Wiring Diagrams,
Troubleshooting & Component Locations
binder
WARNING!
After the ABS warning light -K47- and
warning light for brake system -K118-
have illuminated it is possible that the
rear wheels will lock-up earlier when
braking.
If the ABS warning light -K47- (-2-) goes
out but the warning light for brake
system -K118- (-1-) remains on and
three warning tones are audible then the
malfunction may be:
-a- The brake fluid level is too low.
-b- There is a malfunction in the activation
of the warning light for brake system -
K118-.
If the ABS warning light -K47- (-2-) and
the brake system warning light -K118- (-
1-) light up, the ABS system is faulty
and the EBD (Electronic Brake pressure
Distribution) is not functioning.
Стр. 13из 14 Electrical/electronic components and locations

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Parking brake indicator light -K14-

Electrical Wiring Diagrams,
Troubleshooting & Component Locations
binder
Vehicles with ABS/EDL
Malfunction: Vehicle has no EDL
function
For this complaint a possible cause may be
the brake light switch -F- is incorrectly
adjusted. Adjusting brake light switch
Page 01
-131 .
Another possible cause may be the brake
light switch -F- is not functioning. The
function can be checked in Read measured
value block Page 01
-61 , display group
number 003.
If the parking brake indicator light -K14-
-3- does not go out after switching the
ignition on, the malfunction may be:
-a- The parking brake is applied.
-b- The parking brake warning light switch -
F9- for the parking brake indicator light -
K14- is faulty or incorrectly adjusted.
-c- There is a wire routing malfunction.
Стр. 14из 14 Electrical/electronic components and locations

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Test requirements

The tires installed to all wheels must be of
the same (approved) size; tires inflated to
prescribed pressure.

Mechanical/hydraulic parts of the brake
system including brake light switch and
brake lights OK.

Hydraulic lines and connections not leaking
(visual check of hydraulic unit, brake
calipers, wheel cylinders, tandem master
brake cylinder).

Wheel bearings and wheel bearing play
OK.

ABS control module (w/EDL) -J104- is
correctly bolted to hydraulic unit -N55-.

Connector on ABS control module (w/EDL)
-J104- correctly plugged-in (retainer is
engaged).

Check contacts of ABS components for
damage and correct seating.

All fuses OK according to wiring diagram
(remove fuse from fuse holder to check).

Supply voltage OK (at least 10.0 V).
Стр. 2из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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The PRINT key is used for switching on the
printer (warning lamp in key comes on).

- Switch ignition on.

- Switch on printer with Print key (indicator lamp in
key lights up).

- Press key -1- for "Rapid data transfer" operating
mode.
Rapid data transfer HELP
Enter address word XX Indicated on display
- Press keys -0- and -3-; 03 inputs the address
word of the vehicle system to be tested "Brake
electronics".
Rapid data transfer Q
03 - Brake electronics Indicated on display
- Confirm input with Q key.
1J0 907 379 D ABS 20 IE CAN 0001
Coding 03604 WSC XXXXX
Display shows e.g.
Displayed is:
e.g. (1J0 907 379 D)
Allocation of control module see Parts catalog
Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder
The control module identification number.
System designation (ABS 20 IE)
Data BUS present. (CAN)
Стр. 4из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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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.
Стр. 14из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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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.
Стр. 15из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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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
из 81
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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