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Vehicles with anti-theft secured engine control unitJ623 > < Engine control unitJ623

Leon Mk2

Removing and installing engine control unitJ623
Removing and installing engine control unit -J623-
Removal:
–  First print out or memorise the control unit identification and also the previous control unit coding → Chapter.
–  Turn the ignition off.
–  Remove the air filter housing → Chapter.
   
–  Separate the bracket lugs -arrow A-.
  S24-0337
–  Disconnect and separate the control unit connectors and remove the engine control unit.
Installation
–  Place the new control unit into the retaining frame.
–  Install control unit connector and lock.
–  If engine control unit -J623- is renewed, erase learnt values and adapt engine control unit → Vehicle diagnostic tester„Guided functions“.
–  Install air cleaner housing → Chapter.
–  Read fault memory, repair faults if necessary and then clear fault memory → Vehicle diagnostic tester„Guided fault finding“.
–  If the fault memory has been erased, you must generate the readiness code again.
–  Take vehicle for a test drive.
–  Again read control unit fault memory.
  S10-0111

Vehicles with anti-theft secured engine control unitJ623 > < Engine control unitJ623