1998 VOLKSWAGEN JETTA wheel

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V.A.G 1551
print-out Possible cause
Repair
00290
Left rear
ABS wheel
speed
sensor -
G46-
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

Left rear ABS wheel speed sensor
windings -G46- faulty

Damaged rotor or left rear ABS
wheel speed sensor -G46-
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/left rear ABS wheel
speed sensor -G46-
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-
Стр. 26из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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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

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V.A.G 1551 print-
out Possible cause
Repair
00290
Left rear ABS
wheel speed
sensor -G46-
Mechanical
malfunction
1)
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 installation of left rear ABS wheel
speed sensor -G46- and rotor
- Read measured value block Page 01-
61 Display group number 002
- Perform output Diagnostic Test Mode
(DTM) Page 01
-74
If the malfunction occurs again:

Outlet valve in ABS
hydraulic unit -N55-
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 hydraulic unit -N55-
1) Type of DTC; this DTC is only recognized above 20 km/h (13 mph) (carry out test drive).
Стр. 28из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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List of selectable display group numbers
Display group number
Display zone
Designation
001 1 Wheel speed at left front wheel sensor (km/h)
2 Wheel speed at right front wheel sensor (km/h)
3 Wheel speed at left rear speed sensor (km/h)
4 Wheel speed at right rear speed sensor (km/h)
002 1 Wheel speed at left front speed sensor (km/h)
2 Wheel speed at right front wheel sensor (km/h)
3 Wheel speed at left rear speed sensor (km/h)
4 Wheel speed at right rear speed sensor (km/h)
003 1 Brake light switch
2 Vacant
3 Vacant
4 Vacant
Стр. 44из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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Display group number
Display zone
Designation
006 1
Longitudinal acceleration sensor -G251-
1)
2 Vacant
3 Vacant
4 Vacant
125 1 Data bus for engine
2
Data bus for four-wheel drive
1)
3
Data bus for transmission
2)
4 Vacant
1) Four-wheel drive vehicles with Haldex coupling only.
2) Vehicles with automatic transmission only.
Стр. 45из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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Note:
For display group number 001 remember:
The actual wheel speeds are displayed. They serve to check the speed sensor allocation to the
wheel. (The vehicle must be raised and the wheel must be rotated by hand by a 2nd mechanic).
Read measured value block
1 Display group number: 001
0 km/h 4 km/h 0 km/h 0 km/h
Indicated on display: (Example)

Wheel speed at right rear speed sensor
(0 to 255 km/h)

Wheel speed at left rear speed sensor

(0 to 255 km/h)

Wheel speed at right front speed sensor
(0 to 255 km/h)

Wheel speed at left front speed sensor

(0 to 255 km/h)
Стр. 47из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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Note:
For display group number 002 remember:

The reading of measured value blocks in display group number 002 must be undertaken
when driving off slowly. Then the ABS Control Module (w/EDL) -J104- will store the first
usable voltage signals provided by the speed sensors and display these as a fixed value in
the measured value block.
Read measured value block
2 Display group number: 002
3 km/h
1)
6 km/h1)
2 km/h2)
1 km/h2)
Indicated on display: (when driving off slowly)

Wheel speed at right rear speed sensor
(0 to 255 km/h)

Wheel speed at left rear speed sensor

(0 to 255 km/h)

Wheel speed at right front speed sensor
(0 to 255 km/h)

Wheel speed at left front speed sensor

(0 to 255 km/h)
1) If the deviations in display zones 1 and 2 are greater than 6 km/h (approx. 3.75 mph), the
following malfunctions may be present:
2) If the deviations in display zones 3 and 4 are greater than 2 km/h (approx. 1.25 mph), the
following malfunctions may be present:
Note:

Air gap between speed sensor and rotor may be too wide.
- Check that speed sensor is attached correctly to wheel bearing housing.

Speed sensor or rotor exterior damaged.
- Change damaged component.
Стр. 49из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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Read measured value block
125 Display group number: 125
Engine
1 AWD
1 Gear.
1
Indicated on display (example)

Vacant

Data bus connection for transmission
1)

1 Data bus connection is available.
0 Data bus connection is not available.3)

Data bus for all-wheel drive2)
1 Data bus connection is available.
0 Data bus connection is available.

Data bus for engine

1 Data bus connection is available.
0 Data bus connection is not available.
1) Vehicles with automatic transmission only.

Incorrect transmission control module or incorrect transmission control module coding.

Transmission control module faulty.
Repair Group 01 for relevant transmission code.
2) All-wheel drive vehicles with Haldex coupling only.
3) Data bus connection is interrupted or data bus wires are interchanged.
Electrical Wiring Diagrams, Troubleshooting & Component Locations binder.
Стр. 53из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program