warning light VOLKSWAGEN JETTA 1998 Service Manual

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Note: For Guided Fault Finding information,
refer to VAS 5051 Diagnostic Tester
01 - On Board Diagnostic (OBD)
ABS ITT Mark 20 IE On Board Diagnostic (OBD)

Function

Identifying characteristics

Technical data

Safety precautions

On Board Diagnostic (OBD) with V.A.G 1551 Scan Tool or Tester VAS 5051 (flow chart)


Electrical/electronic co mponents and locations

Diagnostic Trouble Codes (DTC) displayed by warning lights
-K14-, -K47- and -K118-

ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

V.A.G 1551 Scan Tool, connecting and selecting function

Diagnostic Trouble Code (DTC), memory

Automatic test sequence

Vehicle Diagnosis, Testing and Information Sy stem VAS 5051, connecting and selecting ABS
control module
Diagnostic Trouble Code (DTC) table

Diagnostic Trouble Code (DTC) memory, erasing and ending output

ABS control module, coding

Measured value block, reading

Safety precautions

Output Diagnostic Test Mode (DTM)

Basic setting, initiating


ABS, ABS/EDL and ABS/EDL/ASR IT T Mark 20 IE, electrical check

Multi
-pin connector with contact assignment
Test table

Brake light switch, adjusting


ABS Mark 60 On Board Diagnostic (OBD), vehicles from my 10.00

Function

Arrangement of ABS MARK 60

Technical data

Safety precautions and fundamental points regarding troubleshooting

Troubleshooting with V.A.G 1551 scan tool or tester VAS 5051 on ABS Mark 60 (flow chart)


Electrical/electronic compon ents and installing locations


Diagnostic Trouble Codes (DTCs) displayed by warning lights
-K47-, -K118- and -K155-

On Board Diagnostic (OBD), performing

Test prerequisites for OBD

Safety precautions

Scan tool, connecting

V.A.G 1551 scan tool, connecting and selecting function

List of selectable functions

Automatic test sequence

Diagnostic Trouble Code (DTC) memory, checking

Output Diagnosic Test Mode (DTM)

Diagnostic Trouble Code (DTC) table

Diagnostic Trouble Code (DTC) memory, erasing and ending output

ABS control module, coding

Vehicle data label

Measured value block, reading

Output Diagnosic Test Mode (DTM)

Basic setting, initiating

Login procedure


Electrical check of Mark 60

Multi
-pin connector with contact assignments
Test table (test steps 1
- 16)
Test table (test steps 17
- 23)

Definitions


Volkswagen Golf 4 / Bora (1998-2005), GTI / Jetta (1998-2005), R32
(A4)

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Sporadic (isolated) malfunctions will also be
recognized and stored. But if these malfunctions
do not occur again within the next 50 vehicle
starts and driving off sequences then, with the
exception of "control module inoperative", the
DTC memory will be erased.
After switching on the ignition and/or starting the
engine the ABS warning light -K47- and the
warning light for brake system -K118- light up for
approx. 2 seconds.
During this period a test sequence (self-check) is
run in the control module for the following
functions:

To check if the supply voltage is at least 10.0
Volt

To check control module including the valve
windings

To check the coding of the control module

A static check of the speed sensor (no speed
signal)

If after driving off and exceeding a speed of
approx. 20 km/h (approx. 13 mph) the speed
signal is not OK. The ABS warning light -K47-
will light up again.
Стр. 2из 8 ABS ITT Mark 20 IE On Board Diagnostic (OBD)

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Safety precautions

The ABS is a vehicle safety system; the
appropriate knowledge is necessary to work on
the system.

In order to check complaints and to be able to
carry out pin-pointed troubleshooting, the
Diagnostic Trouble Code (DTC) memory must
be checked before beginning work on the ABS
system.

Only separate connectors when the ignition is
switched off.

Observe the appropriate instructions regarding
the handling of brake fluid.
Repair Manual, Brake System, Repair Group
47
ABS malfunctions are indicated by the ABS
warning light illuminating. Certain malfunctions
will only be recognized at speeds above 20
km/h (approx. 13 mph) (carry out road test).

If the ABS Warning Light -K47- and the warning
light for brake system -K118- do not light up,
but the brake system is not functioning correctly
then the malfunction must be sought in the
conventional braking system.
Repair Manual, Brake System; Repair Group
45
Стр. 6из 8 ABS ITT Mark 20 IE On Board Diagnostic (OBD)

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8 -
ABS warning
light -K47-

Location:
instrument
cluster
Function:
Page 01
-17
9 -
Warning light
for brake
system -K118-

Location:
instrument
cluster
Function:
Page 01
-17
10 -
ESP control
lamp -K155-

Location:
instrument
cluster
Стр. 6из 14 Electrical/electronic components and locations

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Diagnostic Trouble Codes (DTC)
displayed by warning lights -K14-, -
K47- and -K118-

Warning lights
For vehicles with ABS/EDL/ASR and/or a
radio/navigation system, the warning
light for brake system -K118- is at
position -3-.
The function of the parking brake
warning light -K14- is then taken on by
the warning light for brake system -
K118-.
Item
Designation
1 Warning light for brake system -
K118-
2 ABS warning light -K47-
3 Parking brake indicator light -K14-
Стр. 11из 14 Electrical/electronic components and locations

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ABS warning light -K47-

Electrical Wiring Diagrams,
Troubleshooting & Component Locations
binder
If the ABS warning light -K47- (-2-) does
not go out after switching ignition on and
completion of test sequence then the
malfunction may be:
-a- Voltage supply is below 10 Volts
-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.
-e- Instrument cluster is faulty.
Стр. 12из 14 Electrical/electronic components and locations

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ABS 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- (-2-) goes
out but the warning light for brake
system -K118- (-1-) remains on and
three warning tones are audible then the
malfunction may be:
-a- The brake fluid level is too low.
-b- There is a malfunction in the activation
of the warning light for brake system -
K118-.
If the ABS warning light -K47- (-2-) and
the brake system warning light -K118- (-
1-) light up, the ABS system is faulty
and the EBD (Electronic Brake pressure
Distribution) is not functioning.
Стр. 13из 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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The PRINT key is used for switching on the
printer (warning lamp in key comes on).

- Switch ignition on.

- Switch on printer with Print key (indicator lamp in
key lights up).

- Press key -1- for "Rapid data transfer" operating
mode.
Rapid data transfer HELP
Enter address word XX Indicated on display
- Press keys -0- and -3-; 03 inputs the address
word of the vehicle system to be tested "Brake
electronics".
Rapid data transfer Q
03 - Brake electronics Indicated on display
- Confirm input with Q key.
1J0 907 379 D ABS 20 IE CAN 0001
Coding 03604 WSC XXXXX
Display shows e.g.
Displayed is:
e.g. (1J0 907 379 D)
Allocation of control module see Parts catalog
Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder
The control module identification number.
System designation (ABS 20 IE)
Data BUS present. (CAN)
Стр. 4из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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V.A.G 1551
print-out Possible cause
Repair
01312
Drive train data
bus faulty
1)


or:
ABS control module (w/EDL) -
J104- incorrectly coded

Engine control module
incorrectly coded
Repair group 01 for relevant
engine code - Check ABS control module
(w/EDL) -J104- coding Page 01
-
58
- Check engine control module
coding

Open circuit, short to positive or
Ground in the wiring - Check wiring and connections
using wiring diagram

- Perform electrical checks Page
01-102
Drive train data
bus faulty
1)

Sporadic
Ignition/starter switch turned
too slowly - Erase DTC memory Page 01-56
- No further measures required
- Inform customer
1) The DTC "Drive train data bus" will not cause the ABS warning light -K47- or warning light for
brake system -K118- to light up. The ABS function is retained over the complete range.
Стр. 32из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program