Get Supplysystem-fuelinjection -> 3 Engine control unit J623 Guide for Volkswagen Fox SUV Second Generation (2003-2021)

FOX 2004 ➤

3 - Cyl. injection engine - Edition 12.2009

3

Engine control unit -J623-

Check and erase the fault memory in the Engine control unit -

J623- ⇒ page 102 again.

Adapt functions and components ⇒ page 104 .

3.1

Engine control unit -J623- - remove and

install

– Before removing it, check identification and code

⇒ page 102 .

– Turn the ignition off.

3.1.1

Removal

– Remove windscreen wiper arms and lower windscreen cov‐

ering ⇒ Electrical equipment; Rep. Gr. 92 ; Windscreen, rear

window and headlight wiper and washer .

lk

– Disengage fitting connectors -arrows - from the Engine control

unit -J623- .

– Move the Engine control unit -J623- to the front part of the

vehicle.

3.1.2

Installation

– Install the Engine control unit -J623 - until blocking it.

– Install fitting connectors for the Engine control unit -J623- .

– Install the windscreen wiper arms and lower windscreen cov‐

ering ⇒ Electrical equipment; Rep. Gr. 92 ; Windscreen wiper

and washer, rear window and headlights .

– Adjust the Engine control unit -J623- ⇒ page 104

– Finally, refer to the fault memory of the new Engine control unit

-J623- and, if necessary, erase the fault memory

⇒ page 102 .

– Perform a test drive.

– Check the fault memory in the Engine control unit -J623- .

3.2

Check and erase the fault memory in the

Engine control unit -J623-

Special tools and workshop equipment required

102

Rep. Gr.24 - Supply system - fuel injection

FOX 2004 ➤

3 - Cyl. injection engine - Edition 12.2009

♦ Diagnosis, Measurement and Information System -VAS

5051A/52-

♦ Vehicle diagnosis, measurement and information system -

VAS 5051A/52- with Cable -VAS 5051/1 - or Cable -

VAS 5051/3- .

Operation sequence

– Connect the Diagnosis, Measurement and Information Sys‐

tem -VAS 5051A/52- as follows:

lk

– Connect with the Cable -VAS 5051/1- or Cable -VAS 5051/3-

to the diagnosis plug.

– Start the engine and run it at idle speed.

Only when engine does not run:

– Turn the ignition on.

Select operation mode:

– Press “Vehicle self-diagnosis” on the display.

Select the vehicle system:

– Press “01 - Engine electronic system” on the display.

The display shows the Engine control unit -J623- identification

and code.

Select diagnosis function:

– Press “02 - Check fault memory” on the display.

– If no faults are stored in the Engine control unit -J623- , the

display shows “0 faults found”.

– If there are fault on the Engine control unit -J623- , they are

indicated on the display one after the other.

– Press the key← .

– Press “05 - Erase fault memory ” on the display.

– Press “06 - End test” on the display.

3. Engine control unit J623

103

FOX 2004 ➤

3 - Cyl. injection engine - Edition 12.2009

3.3

Functions and components - adapt

Special tools and workshop equipment required

♦ Diagnosis, Measurement and Information System -VAS

5051A/52-

lk

♦ Cable -VAS 5051/1- or Cable -VAS 5051/3-

Operation sequence

– Connect the Diagnosis, Measurement and Information Sys‐

tem -VAS 5051A/52- -arrow-:

– Connect with the Cable -VAS 5051/1- or Cable -VAS 5051/3-

to the diagnosis plug.

Select, in the Diagnosis, Measurement and Information System -

VAS 5051A/52- the “Assisted fault finding”.

After having checked all command units:

– Press the “Skip” key

– Select “Function/component selection”

– “Select drive”

– Select “Engine identification letters”

– Select “ 01 - Systems with self-diagnosis”

– Select “Engine distribution”.

– Select “Functions”

– Select “Function or component”

104

Rep. Gr.24 - Supply system - fuel injection

Supplysystem-fuelinjection -> 3 Engine control unit J623 for Your Volkswagen Fox SUV Second Generation (2003-2021)

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