1998 VOLKSWAGEN BORA wiring

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On Board Diagnostic (OBD),
performing
Test prerequisites for OBD

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).

ABS Control Module (w/EDL) -J104- is
correctly bolted to ABS 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 according to wiring diagram OK
(remove fuse from fuse holder to check).

Supply voltage OK (at least 10.0 V).
Стр. 1из 129 On Board Diagnostic (OBD), performing

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Diagnostic Trouble Code (DTC) table
Note:

When beginning On Board Diagnostic (OBD) troubleshooting 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 (w/EDL) -J104-
and printed-out on V.A.G 1551 or VAS 5051, are listed on the following pages according to
the 5 digit DTC code.

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


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

The 5 digit P code which may appear next to the DTC code, is for use with the On Board
Diagnosis (OBD) 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 tool or the
VAS 5051 and erase.

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

After the road test check DTC memory again.
Стр. 31из 129 On Board Diagnostic (OBD), performing

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V.A.G 1551 print-
out Possible cause
Repair
00283
Left front ABS
wheel speed
sensor -G47-
1)
Electrical
malfunction in
current circuit
Open circuit in wiring between
left front ABS wheel speed
sensor -G47- and ABS control
module (w/EDL) -J104-
Repair Manual, Brake System,
Repair Group 45; Removing and
installing parts of ABS system on
front and rear axles - Check wiring and connections
using wiring diagram
- Perform electrical check Page
01-288
- Read measured value block
Page 01
-240 Display group number
001
If the malfunction occurs again:

Left front ABS wheel speed
sensor -G47- faulty
Repair Manual, Brake System,
Repair Group 45 - Replace left front ABS wheel
speed sensor -G47-
1) This DTC is recognized when vehicle is stationary.
Стр. 33из 129 On Board Diagnostic (OBD), performing

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V.A.G 1551 print-
out Possible cause
Repair
00283
Left front ABS
wheel speed
sensor -G47-
1)
Implausible signal
Open circuit or loose contact in wiring
between Left front ABS wheel speed
sensor -G47- and ABS control module
(w/EDL) -J104- - Check wiring and
connections using wiring
diagram

- Perform electrical check
Page 01
-288
Electrical interferences from other
sources (high frequency radiation e.g.
uninsulated ignition cable) - Read measured value
block Page 01
-240
Display group number 001
1) Type of DTC, this DTC is only recognized above 20 km/h (13 mph) (carry out test drive).
Стр. 34из 129 On Board Diagnostic (OBD), performing

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V.A.G 1551 print-
out Possible cause
Repair
00283
Left front ABS
wheel speed
sensor -G47-
Mechanical fault
1)
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 installation of left front ABS
wheel speed sensor -G47- and rotor
- Read measured value block
Page 01
-240 Display group numbers
001 and 002
- Perform test drive

Short to positive or ground in
wiring - Check wiring and connections using
wiring diagram
- Perform electrical check Page
01-288
Left front ABS wheel speed
sensor -G47- faulty
Repair Manual, Brake System,
Repair Group 45 - Replace left front ABS wheel speed
sensor -G47-
1) Type of DTC, this DTC is only recognized above 20 km/h (13 mph) (carry out test drive).
Стр. 35из 129 On Board Diagnostic (OBD), performing

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V.A.G 1551 print-
out Possible cause
Repair
00285
Right front ABS
wheel speed
sensor -G45-
1)
Electrical
malfunction in
current circuit
Open circuit in wiring between
Right front ABS wheel speed
sensor -G45- and ABS control
module (w/EDL) -J104-
Repair Manual, Brake System,
Repair Group 45; Removing and
installing parts of ABS system on
front and rear axles - Check wiring and connections
using wiring diagram
- Perform electrical check Page
01-288
- Read measured value block
Page 01
-240 Display group number
001
If the malfunction occurs again:

Right front ABS wheel speed
sensor -G45- faulty
Repair Manual, Brake System,
Repair Group 45 - Replace Right front ABS wheel
speed sensor -G45-
1) This malfunction is recognized when vehicle is stationary.
Стр. 36из 129 On Board Diagnostic (OBD), performing

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V.A.G 1551 print-
out Possible cause
Repair
00285
Right front ABS
wheel speed
sensor -G45-
1)
Implausible signal
Open circuit; short to ground or loose
contact in wiring between Right front ABS
wheel speed sensor -G45- and ABS
control module (w/EDL) -J104- - Check wiring and
Connection using wiring
diagram
- Perform electrical
check Page 01
-288
Electrical interferences from other sources
(high frequency radiation e.g. uninsulated
ignition cable) - Read measured value
block Page 01
-240
Display Group number
001
1) This DTC is only recognized above 20 km/h (13 mph) (carry out test drive).
Стр. 37из 129 On Board Diagnostic (OBD), performing

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V.A.G 1551 print-
out Possible cause
Repair
00285
Right front ABS
wheel speed sensor
-G45-
Mechanical
malfunction
1)
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 installation of right front
ABS wheel speed sensor -G45- and
rotor
- Read measured value block
Page 01
-240 Display group
numbers 001 and 002
- Perform test drive


Short to positive or ground in
wiring - Check wiring and connections
using wiring diagram
- Perform electrical check Page
01-288

Right front ABS wheel speed
sensor -G45- faulty
Repair Manual, Brake System,
Repair Group 45 - Replace Right front ABS wheel
speed sensor -G45-
1) This DTC is only recognized above 20 km/h (13 mph) (carry out test drive).
Стр. 38из 129 On Board Diagnostic (OBD), performing