SEAT Workshop Service and Repair Manuals

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

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

Work sequence

• ‒ First print out the control unit identification of 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 "End data transfer" function and confirm input with the Q key.

• ‒ Switch off ignition.

Note:

If the control unit version installed in the vehicle is not displayed, renew control unit. For the current engine control unit part number:

=> Parts microfiche

• ‒ Remove battery.
• ‒ → Unclip the control unit from the retaining frame -arrows- and pull out to left.
• ‒ Release connector from control unit and pull off.
• ‒ Insert new control unit and press to the right.
• ‒ Install battery.
• ‒ Adapt new control unit to throttle valve control part and exhaust gas recirculation valve => Page 24-111
• ‒ Adapt new control unit to the electronic immobilizer.

=> Electrical system self-diagnosis; Repair group 01

• ‒ On vehicles with cruise control system: Check whether this function has been enabled (activated) => Page 01-9. If "G" is not evident in the control unit identification, activate the cruise control system.

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

Vehicles with automatic gearboxes:

• ‒ Adapt control unit for automatic gearbox:

=> Self-diagnosis for automatic gearbox 099; Repair group 01; Performing self-diagnosis; Initiating basic setting

• ‒ Learning kick-down point => Page 24-116

Continued for all vehicles

• ‒ Then subsequently interrogate the fault memory of the new engine control unit and erase the fault memory if necessary.
• ‒ Perform idling check
  => Page 24-82
• ‒ Carry out test drive.

• During the road test the following operating conditions must be fulfilled:
• ‒ The coolant temperature must exceed 80 °C .
• ‒ When the temperature is reached, the operating conditions
      Idling
      Part throttle
      Enrichment
      Full throttle
      Overrun
  must be attained several times.

• ‒ Again interrogate the control unit fault memory.