SEAT Workshop Service and Repair Manuals > Leon Mk2 > Power unit | Manual 4-cyl. injection engine (4 valves), mechanics | Mixture preparation system, electronic inj.,Gas | Engine control unit | Engine control unit: renew

Removal

–	First print out the control unit identification and thereby the previous control unit coding as follows:

–	Connect fault reader -V.A.G 1551- (-V.A.G 1552-). Switch on ignition and use address word 01 to select engine control unit. (Connecting fault reader and selecting engine control unit → Vehicle diagnosis, testing and information system VAS 5051.)

The control unit identification and the coding will appear on the display, e.g.:

–	Print out the control unit identification by pressing the fault reader print button.

–	Press → key.

036 906014AN     MARELLI 4CV      2331 →

Coding 00011                   WSC XXXXX

Indicated on display:

–	Press keys 0 and 6 for the “End output” function and confirm input with the Q key.

Rapid data transfer                 HELP

Select function XX

Indicated on display:

–	Switch off ignition.

–	Release connector from control unit and pull off.

Rapid data transfer                 HELP

Enter address code XX

–	Unclip the control unit from the retaining frame -arrows-.

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