SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4LV Injection and Ignition System | Mixture preparation system, electronic inj.,Gas

Work sequence

–	First print out the control unit identification and, at the same time, the previous control unit code, as follows:

–	Connect the -V.A.G. 1551- (-V.A.G. 1552-). Switch on the ignition and enter the “address code” 01 to select the engine control unit. (Fault reader: connecting and selecting the engine control unit → Chapter.)

–	Press Print on the fault reader to print out the control unit identification.

–

Press →.

–	Press 0 and 6 for the function “End transmission” and confirm the entry with the Q key.

036 906 034 L MARELLI 4LV 3038 →

Encoding 00001 WSC XXXXX

Reading on display:

–	Switch off the ignition.

–	Remove the wiper arms and air deflector: → Electrical system; Rep. Gr.92

–	Free the connectors from the control unit and remove them.

Rapid data transmission             HELP

Select function XX

–	Remove the attachments from the support frame -arrow- and remove the control unit.

–	Fit the new control unit in the support frame and fix it.

–	Fit the control unit connectors and block them.

–	Check the previous encoding and encode the new control unit → Chapter.

–	Adapt the new control unit to the throttle valve control unit → Chapter.

–	Adapt the new control unit to the electronic immobiliser → Anchor.

–	Finally, consult the fault memory of the new engine control unit and, if necessary, clear the fault memory → Anchor, Fault memory: consulting and clearing

Note!

This operation must be carried out after encoding the new engine control unit and adapting the new unit to the throttle valve drive.

SEAT Workshop Service and Repair Manuals