1998 VOLKSWAGEN JETTA check engine

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2 -
ABS control
module
(w/EDL) -
J104-

Location: on
hydraulic unit
on left of
engine
compartment

Checked by
On Board
Diagnostic
(OBD)

Checking the
multi-pin
connector to
control
module
Page 01
-106
Do not
disconnect
connector
before
successfully
completing
OBD. Switch
ignition off
before
separating
connection.
Стр. 2из 14 Electrical/electronic components and locations

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Repair Manual,
Brake System,
Repair Group 45 3 -
ABS/EDL and
ABS/EDL/ASR
hydraulic unit
-N55-

Located on
left of engine
compartment.

The ABS
hydraulic
pump -V64-
and the
inlet/outlet
valves in the
hydraulic unit
are checked
by On Board
Diagnostic
(OBD)

The ABS
hydraulic
pump -V64-
and valve
block must
not be
separated
from one
another

Removing
and installing
When
changing the
hydraulic
unit, always
seal the old
part with the
plugs from
the repair set
Part No. 1H0
698 311 A
Стр. 3из 14 Electrical/electronic components and locations

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4 -
ABS/EDL and
ABS/EDL/ASR
Control
Module -J104-

Location: on
hydraulic unit
on left of
engine
compartment

Checked by
On Board
Diagnostic
(OBD)

Checking the
multi-pin
connector to
control
module
Page 01
-106
Do not
disconnect
connector
before
successfully
completing
OBD. Switch
ignition off
before
separating
connection.
Стр. 4из 14 Electrical/electronic components and locations

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5 -
Brake light
switch -F-

The brake
light switch is
open in the
rest position;

Adjusting
Page 01
-131
Can be
checked via
read
measured
value block
Page 01
-
61
6 -
Data Link
Connector
(DLC)

Installation
position: in
center
console
below
heating/air
conditioning
controls
7 -
Longitudinal
acceleration
sensor -G251-

All-wheel
drive
vehicles with
Haldex
coupling only
Стр. 5из 14 Electrical/electronic components and locations

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11 -
Right/left
front ABS
wheel speed
sensor -G45-/-
G47-

Checked by
On Board
Diagnostic
(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
ensure it is
not twisted in
the wheel
housing

Bolt
tightening
torque - 10
Nm
12 -
Wheel hub
with impulse
rotor for
right/left front
speed
sensors

Rotor and
speed
sensors for
front left and
right-hand
sides are
identical
Стр. 7из 14 Electrical/electronic components and locations

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13 -
Right/left rear
ABS wheel
speed sensor
-G44-/-G46-

Checked by
On Board
Diagnostic
(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
ensure it is
not twisted in
the wheel
housing

Bolt
tightening
torque - 10
Nm
14 -
Wheel hub
with impulse
rotor for
right/left rear
speed
sensors

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

Removing
and installing
Стр. 9из 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