1998 VOLKSWAGEN JETTA check engine

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Repair Manual,
Suspension, Wheels,
Steering, Repair
Group 42; Servicing
19 -
Right/left rear
speed sensor
-G44-/-G46-

Checked by
OBD

Before
inserting the
sensor clean
the inner
surface of
the sensor
mounting
and coat with
lubricating
paste G 000
650

When
connecting
the speed
sensor wire
make sure it
is not twisted
in the wheel
housing

Securing bolt
tightening
torque - 10
Nm (7.4 ft lb)
20 -
Wheel hub
with rotor for
speed
sensors

Rotor and
speed
sensors for
left rear and
right-hand
sides are
identical

Removing
and installing
Стр. 16из 17 Electrical/electronic components and installing locations

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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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Access to the OBD is only possible when the
vehicle is stationary and ignition turned on
(or engine running).

Wheel bearings and wheel bearing play are
OK.

When checking the ABS system make sure
that the vehicle electric system is not
affected by electro-magnetic interference,
i.e. the vehicle is kept away from equipment
with a high current draw, e.g. from an electric
welding module.

Safety precautions

WARNING!

You must always secure testing and
measuring equipment on the rear seat.

When vehicle is being driven, a second
technician must operate this equipment.
Стр. 2из 129 On Board Diagnostic (OBD), performing

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Scan tool, connecting
All functions which could previously be
performed with V.A.G 1551/1552 can also
be performed with the new tester VAS 5051
in the operating mode vehicle OBD.
Operating instructions for Vehicle
Diagnosis, Testing and Information System
VAS 5051.

Special tools and equipment
VAS 5051 Vehicle Diagnosis, Testing
and Information System
Diagnostic cable VAS 5051/1 or VAS
5051/3
The ABS function is switched off in the
control module during the On Board
Diagnostic (OBD).
The Diagnostic Trouble Code (DTC)
memory can be erased after
successfully checking and repair.
Стр. 3из 129 On Board Diagnostic (OBD), performing

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Note:

The ABS function is switched off in the control
module during the OBD. This is indicated by th
e
flashing of ABS warning light -K47- and warning
light for brake system -K118-. If there is a
malfunction currently, it will be indicated by the
lights being on constantly.

The DTC memory can be erased after
successful check and repair.
- With ignition switched off, connect V.A.G 1551
to diagnostic connection using cable V.A.G
1551/3 A.
- Connect VAS 5051 Page 01
-31 .
V.A.G - On Board Diagnostic HELP
1 - Ra
pid data transfer1)
2 - Blink code output1)
Indicated on display:
1) Is displayed alternately
If the display remains blank, check Data Link
Connector connection, Electrical check, Page
01-288 , test steps 21 and 22.
Note:
Depending on the program, additional operating
information can be printed out by pressing the
HELP key of V.A.G 1551.
The key is used for moving forward within
the program
The PRINT key is used for switching on the
printer (warning lamp in key comes on).
Стр. 6из 129 On Board Diagnostic (OBD), performing

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If "control module does not answer!" again
appears:
Rapid data transfer HELP
control module does not answer! Indicated on display:
- Perform test steps 1, 2 and 3 Page
01-288 , Electrical check.
Rapid data transfer
No signal from control module!
Control module identification influenced
during checking (possibly influenced from
external sources?)
- Check diagnostic wire as well as voltage
supply and Ground connection for ABS
Control Module (w/EDL) -J104-,
Electrical check, Page 01
-288 .
- After repairing the possible causes of the
malfunction, again enter the address
word 03 for "Brake electronics" and
confirm with Q key.
Стр. 9из 129 On Board Diagnostic (OBD), performing

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List of selectable functions

Page
00
- Automatic test sequence Page
01-169
01
- Check control module version
Connecting V.A.G 1551 scan
tool and selecting function Page
01-163
01
- Check control module version
Connecting tester VAS 5051 and
selecting function Page
01-31
02
- Check Diagnostic Trouble Code
(DTC) memory Page
01-170
03
- Output Diagnostic Test Mode
(DTM) Page
01-74
04
- Initiate basic setting Page
01-264
05
- Erase DTC memory Page
01-230
06
- End output Page
01-230
07
- Code control module Page
01-232
08
- Read measured value block Page
01-240
11
- Login procedure Page
01-287
Стр. 10из 129 On Board Diagnostic (OBD), performing

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Automatic test sequence

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

- Switch on ignition.
V.A.G - On Board Diagnosic HELP
1 - Rapid 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 to enter "Check
automatic test sequence" function.
- Confirm entry with Q key.
032906026BI 1.6l R4 MONO 1.3 D1 TEV
Codin
g 00002 WSC XXXXX
The V.A.G 1551 scan tool will show the engine
control module identification is displayed first e.g.
Thereafter all control module identifications with
eventual DTC memory entries are displayed.
Стр. 11из 129 On Board Diagnostic (OBD), performing