VOLKSWAGEN JETTA 1998 Service Manual

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

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Diagnostic Trouble Codes
(DTCs) displayed by
warning lights -K47-, -K118-
and -K155-
Warning lamps
Item
Designation
1 ABS warning light -K47-
2 Warning light for brake system -
K118-
3 ASR/ESP Control Lamp -K155-
Стр. 1из 4 Diagnostic Trouble Codes (DTCs) displayed by warning lights -K47-, -K118- and -K155-

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ABS warning light -K47-

Electrical Wiring Diagrams,
Troubleshooting & Component Locations
binder
If the ABS warning light -K47- -1- does
not go out after switching ignition on and
completion of test sequence then the
malfunction may be:
-a- Voltage supply is below 10 Volt
-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 (open circuit).
-e- Instrument cluster is faulty.
Стр. 2из 4 Diagnostic Trouble Codes (DTCs) displayed by warning lights -K47-, -K118- and -K155-

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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- -1- goes
out but the warning light for brake
system -K118- -2- remains on, then the
malfunction may be:
-a- The parking brake is applied.
-b- There is a malfunction in the
activation of the warning light for brake
system -K118-.
-c- The brake fluid level is too low.
If the ABS warning light -K47- -1- and
the warning light for brake system -
K118- -2- illuminate, the ABS system is
faulty and the EBD (Electronic brake
pressure distribution) is not functioning.
Стр. 3из 4 Diagnostic Trouble Codes (DTCs) displayed by warning lights -K47-, -K118- and -K155-

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ASR/ESP Control Lamp -K155-

Electrical Wiring Diagrams,
Troubleshooting & Component Locations
binder
If ASR/ESP control lamp -K155- flashes
while driving, the ASR or ESP system is
regulating the system.
If the ESP control lamp -K155- -3- does
not go out after ignition is switched on
and test sequence is completed then
the malfunction may be:
-a- Short to positive in ASR/ESP button -
E256-.
-b- There is a malfunction in the
activation of the ESP control lamp -K155-
.
-c- The ASR/ESP system has been
switched off via ASR/ESP button -E256-.
There is a malfunction present which
only affects the safety systems of the
ASR/ESP. The ABS/EDL and EBD
safety systems of the vehicle remain fully
functional.
Стр. 4из 4 Diagnostic Trouble Codes (DTCs) displayed by warning lights -K47-, -K118- and -K155-

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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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Connecting VAS 5051

Selecting operating mode:
Selecting vehicle system:
The control module identification and
coding are indicated on the display.
Selecting diagnosis function:
All diagnostic functions available are
indicated on the display.
Note:
The following test sequences are for V.A.G
1551 scan tool. - Pull cover -1- off in direction of -arrow-.
- With ignition switched off, connect tester
VAS 5051 to Data Link Connector using
diagnosis cable VAS 5051/1 or VAS
5051/3.
- Press button on display for "Vehicle On
Board Diagnostic (OBD)".
- Press button "03 - brake electronics" on
the display.
- Press button on display for desired
function.
- Further measures see repair procedures.
Стр. 4из 129 On Board Diagnostic (OBD), performing