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Removing and installing engine control unitJ623 with protective housing (Polo) > < Engine control unitJ623

Polo Mk5

Removing and installing engine control unitJ623 (Polo)
Removing and installing engine control unit -J623- (Polo)
If you wish to renew the engine control unit, connect the → Vehicle diagnostic tester and carry out the guided function „Renew control unit“.
   
Removing
–  Switch off ignition.
–  Remove air filter → Chapter.
–  Release connectors on engine control unit and pull off connector.
  S10-0111
–  Press clips -arrows A- outwards and pull engine control unit out to side -B-.
Installing
–  Insert new engine control unit and press to the left.
–  Fit connectors and lock in position.
–  If engine control unit -J623- is renewed, erase learnt values and adapt engine control unit → Vehicle diagnostic tester„Guided functions“.
–  Read fault memory, repair faults if necessary and then clear fault memory → Vehicle diagnostic tester„Guided fault finding“.
–  The readiness code must be generated if the fault memory has been erased.
–  Install air filter → Chapter.
–  Carry out a road test.
–  Read control unit fault memory again.
  S24-0337

Removing and installing engine control unitJ623 with protective housing (Polo) > < Engine control unitJ623