Volkswagen Golf / Golf GTI / Jetta. Manual — part 234

24-190

Test sequence

Note:

To check the vehicle speed signal, the vehicle
must be driven. To do this a second person is
necessary.

WARNING!

Secure test equipment to rear seat and
operate it from this position.

- Connect VAG 1551 Scan tool (or VAG 1552)

and select engine electronics control module
with "Address word" 01. Engine must be running
at idle speed: ((VAG 1551 and Motronic Engine
Control Module (ECM) -J220-, connecting and
selecting

Page 01-12

).

Rapid data transfer

HELP

Select function XX

Indicated on display:

- Press buttons -0- and -8- for function "Read

measured value (data) block" and confirm entry
with -Q- button.

Read measured value block

Input display group number XXX

Indicated on display:

- Press buttons -0-, -0- and -5- for "Display group

number 5" and confirm entry with -Q- button.

Additional signals, checking

24-191

Read measured value block 5

1

2

3

4

Indicated on display: (1 to 4

display zones)

Observe the valid safety precautions
when performing a road test

Page

24-33

.

If no speed is indicated or the
display values do not reduce when
driving at a lower speed:

Repair Manual, Electrical

Equipment; Repair Group 92

- Road test vehicle with a 2nd

person to observe display.

- Observe figure displayed in

display zone 3:

Specification: approx. driven

speed

- Drive slower. Displayed value

must decrease.

- Press

button.

- Press buttons -0- and -6- for

function "End output" and confirm
entry with -Q- button.

- Switch off ignition.

- Remove wiper arms and cowl

panel:

Additional signals, checking

24-192

Note:

Front right wheel must not turn, if
necessary, hold to prevent it from
turning.

If the display does not fluctuate:

Electrical Wiring Diagrams,

Troubleshooting & Component
Locations

- Connect VAG 1598/31 test box to

control module wiring harness.
Engine Control Module (ECM) -
J220- remains disconnected.

- Connect multimeter to measure

voltage between test box sockets
1 (Ground) and 54 (vehicle speed
signal) using adapter cables from
VAG 1594.

- Raise vehicle at front left.

- Switch on ignition.

- Rotate front wheel and observe

voltage display.

Specification: 0.0... at least 4.0 V

fluctuating

- Check wiring from test box socket

54 to instrument cluster for
open/short circuit:

Additional signals, checking

24-193

- Check DTC memory, repair malfunctions if

necessary and then erase DTC memory

Page

01-23

.

- Read readiness code

Page 01-146

. If DTC

memory has been erased or Motronic Engine
Control Module (ECM) -J220- was disconnected
from battery positive (B+), readiness code must
be generated again

Page 01-149

.

Additional signals, checking