Volkswagen Golf / Golf GTI / Jetta. Manual — part 340

01-22

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).

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

01-23

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

Note:

All functions which could previously be

performed with V.A.G 1551 can also be
performed with the new tester VAS 5051.

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 successful checking and
repair.

Connecting VAS 5051

Page 01-31

.

- Pull cover -1- off in direction of arrow.

- With ignition switched off connect V.A.G 1551

using cable V.A.G 1551/3(A) to Data Link
Connector

V.A.G - On Board Diagnostic

HELP

1 - Rapid data transfer1)

2 - Blink code output1)

Indicated on display

1)

Is displayed alternately

Note:

If there is no indication on display, check DLC,
Electrical checks

Page 01-102

, test steps 14

and 15.

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.

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

01-24

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)

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

01-25

Control module code (03604).

Coding control module

Page 01-

58

Workshop code

V.A.G 1551 Scan Tool operating

instructions

If the control module identification
number does not appear

Summary

of selectable functions

Page 01-

27

- Press

key.

Rapid data transfer

HELP

Select function XX

Indicated on display (select function,

e.g. 02 - Check DTC memory).

Rapid data transfer

HELP

Control module does not answer!

Indicated on display

By pressing the HELP key, a list of
possible fault causes is printed out.

If "Control module does not answer!"
again appears:

- After eliminating possible causes

of malfunctions, enter the address
word 03 for "Brake electronics"
again and confirm.

Rapid data transfer

HELP

Control module does not answer!

Indicated on display

- Perform test steps 1, 2 and 3

Page 01-102

, Electrical check.

Rapid data transfer

No signal from control module!

malfunctions have occurred during

checking of control module
identification (possibly influenced
from external sources?)

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