Volkswagen Golf / Golf GTI / Jetta. Manual — part 232

24-182

Motronic Engine Control Module (ECM) -
J220- to Throttle Valve Control Module -
J338-, matching

Function

First, old learned values are erased. This is

necessary to set learned values, which may be at
the limit, to a neutral (Diagnostic Trouble Code
(DTC) position. The adaptation teaches the
Motronic Engine Control Module (ECM) -J220-
the various positions of the throttle unit when the
ignition is switched on and the engine is not
running. These positions are stored in the control
module.

Adapting sequence must be performed if:

The voltage supply is interrupted

The Throttle Valve Control Module -J338- has

been removed and installed or possibly cleaned

The Throttle Valve Control Module -J338- is

replaced

If when installing another engine another

Throttle Valve Control Module -J338- is
installed

The Motronic Engine Control Module (ECM) -

J220- is replaced

Faulty components such as oxygen sensors or

fuel injectors have been replaced.

Motronic Engine Control Module (ECM) -J220-

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Special tools and equipment

Note:

All functions which could previously
be performed with VAG 1551/1552
can also be performed with the VAS
5051.

Test requirements

VAG 1551 Scan tool (or VAG

1552) with VAG 1551/3 adapter
cable

The fuses must be OK.

The battery voltage must be at

least 11.5 V.

All electrical accessories, e.g.

lights and rear window defroster
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.

The throttle valve must be at idle

speed position (accelerator must
not be depressed during test).

Motronic Engine Control Module (ECM) -J220-

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The throttle valve must not be soiled (carbon

deposits).

No Diagnostic Trouble Code (DTC)s must be

stored in DTC memory

Page 01-23

.

Coolant temperature must be 5 to 110 C

display group 4, display zone 3.

Work sequence

- Connect VAG 1551 Scan tool (or VAG 1552).

Then switch ignition on and select Motronic
Engine Control Module (ECM) -J220- with
"Address word" 01. ((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 -1- and -0- for function "Adaption"

and confirm entry with -Q- button.

Adapting

Feed in channel number XX

Indicated on display:

- Press button -0- button twice- for "Channel

number 0" and confirm entry with -Q- button.

Adaption

Q

Erase learned values?

Indicated on display:

- Confirm input with -Q- button.

Motronic Engine Control Module (ECM) -J220-

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Adaption

learned values have been erased

Indicated on display:

- Press

button.

Rapid data transfer

HELP

Select function XX

Indicated on display:

- Press buttons -0- and -4- for

function "Initiate basic setting"
and confirm entry with -Q- button.

Basic setting

Input display group number XXX

Indicated on display:

- Press buttons -0-, -6- and -0- for

"Display group number 60" and
confirm entry with -Q- button.

System in basic setting 60

xxx.x %

xxx.x % x

ADP. runs

Indicated on display: (1 to 4

display zones)

After pressing the -Q- button the
throttle valve positioner is switched
so that it is not supplied with
voltage.

In this condition the throttle valve is
pulled into an emergency running
position by a mechanical spring in
the Throttle Valve Control Module -
J338-. The values that both angle
sensors provide in the emergency
running position are stored by the
Motronic Engine Control Module
(ECM) -J220-.

Motronic Engine Control Module (ECM) -J220-