Volkswagen Golf / Golf GTI / Jetta. Manual — part 108

01-13

Test prerequisites

The fuses must be OK.

The main fuses must be OK.

The battery voltage must be at

least 11.5 V.

Ground (GND) connection

between engine and body must
be OK.

All electrical devices, e.g. lights

and rear window heating must
be switched off.

If the vehicle is equipped with air

conditioning, it must be turned
off.

Selector lever must be in

position "P" or "N" on vehicles
with an automatic transmission.

On Board Diagnostic (OBD)

01-14

Work sequence

After the scan tool has been
connected, depending upon desired
function:

Note:

Electrical Wiring Diagrams,

Troubleshooting & Component
Locations

Scan tool operating instructions

- Connect VAG 1551 scan tool

((VAG 1552) with cable VAG
1551/3.

- Switch ignition on or Start engine

Page 01-9

, Table "Selectable

functions".

If the display remains blank,

check voltage supply for DLC:

If the display does not indicate as

described in the work sequence:

If due to an input malfunction

"Fault in the data transfer!" is
displayed, pull wire off scan tool,
reconnect and repeat work step.

On Board Diagnostic (OBD)

01-15

- Operate scan tool taking into account the

information on display:

VAG SELF-DIAGNOSIS

HELP

1 - Rapid data transfer*

2 - Flash code output*

Indicated on display:

* Appears alternately

- Operate scan tool, taking into account the

information on display:

- Press button -1- for "Rapid data transfer".

- Press buttons -0- and -1- for address word

"Engine electronics" and confirm entry with -Q
button.

022906032BL MOTRONIC ME7.1.1 G 0006

Coding 00032

WSC 00000

The control module identification and coding are

shown on the display, e.g.:

Parts catalog

022 906 032 BL

Part No. of the control

module (for latest control module version:)

MOTRONIC ME7.1.1 = System designation

(Motronic)

G = Cruise control system (CCS) activated

0006 = Program level number

On Board Diagnostic (OBD)

01-16

Coding 00032 = control module coding, coding

variants of Motronic Engine Control Module
(ECM) -J220-

Page 24-181

.

WSC 00000 = Workshop code of VAG 1551

with which the last coding was carried out. (If
the factory coding has not been changed, WSC
00000 appears)

Note:

Replace control module if the control module

version displayed does not correspond to the
vehicle

Page 24-173

.

A wrong coding of the Engine Control Module

results in:

Engine running Diagnostic Trouble Codes

(DTCs) (gear change jerks, load change jerks,
etc.)

Increased fuel consumption

Increased exhaust gas emissions

Diagnostic Trouble Codes (DTCs) stored in

DTC memory which are not actually present
(false DTCs)

Functions will not be performed (Oxygen

Sensor (O2S) control, activation of the
Evaporative Emissions (EVAP) Canister
system, etc.).

Reduced service life of transmission

On Board Diagnostic (OBD)