SEAT Workshop Service and Repair Manuals

The engine control unit regulates the injection, throttle valve control part, Lambda regulation, ignition, knock control, activated charcoal filter solenoid valve 1, speed limitation via injectors or fuel pump relay, camshaft adjustment as well as self-diagnosis

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

• ◆ Fault reader V.A.G 1551 with cable V.A.G 1551/3

Removing

• ‒ First print out the control unit identification and thereby the previous control unit coding as follows:
• ‒ Connect the fault reader V.A.G 1551 (V.A.G 1552). Then switch ignition on and select engine control unit with the "Address word" 01.
  (Connecting fault reader and selecting engine control unit .)

• ‒ Print out the control unit identification by pressing the fault reader print button.
• ‒ Press the ⇒key.
• ‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.
• ‒ Switch off ignition.
• ‒ Remove battery.
• ‒ Release connector from control unit and pull off.
• ‒ Press the retaining tab to side and pull the control unit out.

Installing

• ‒ Place the new control unit into the retaining frame.
• ‒ Install control unit connector and lock.
• ‒ Check the previous coding and the coding of the new control unit.

Note:

If the coding corresponding to the vehicle is not displayed, renew control unit .

• ‒ Adapt new control unit to the electronic immobilizer.

=> Electrical system; Repair group 01; Immobilizer self-diagnosis; Adaption following renewal of engine control unit

• ‒ Adapt new control unit to throttle valve control part => Page 24-153.
• ‒ If the vehicle is equipped with a cruise control system, check if this function is activated => Page 01-9. If "G" does not appear in the control unit identification, activate the cruise control system.

=> Current flow diagrams, Electrical fault finding and Fitting locations

Vehicles with automatic gearboxes:

• ‒ Learning kick-down point => Page 24-158
• ‒ On vehicles with automatic gearbox the gearbox control unit must be matched additionally:

=> Self-diagnosis for automatic gearbox 09B - 5-speed; Repair group 01; Performing self-diagnosis; Initiating basic setting

Continued for all vehicles

• ‒ Interrogate fault memory, if necessary, repair any faults and then erase fault memory => Page 01-16, interrogating and erasing fault memory.
• ‒ Perform idling check
  => Page 24-112
• ‒ Generate readiness code => Page 01-64