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Adapting components > < Engine control unit

Polo Mk4

Removing and installing engine control unit
Removing and installing engine control unit
–  Before removing engine control unit, read the control unit identification and, with it, the coding of the current control unit → Chapter.
–  Switch off ignition.
Special tools and workshop equipment required
t  Electric cutter -V.A.G 1561 A-
   
t  Saw set -V.A.G 1561/14-
Vehicles with anti-theft secured engine control unit
Removing
–  Remove windscreen wiper arms and the cover for plenum chamber: → Electrical system; Rep. Gr.92
  Caution
Cover the brake hose and the cable to the brake fluid container in order to avoid damage.
  W00-0532
–  Cut into heads of shear bolts -arrows-.
–  Twist bolts out using pliers and remove cover from protective housing.
–  Push the clips of the protective housing in the plenum chamber together and unhook it from the bulkhead.
–  Pull the protective housing off the engine control unit.
–  Release connector on engine control unit and pull off connector.
Installing
–  Fit connector and lock in position.
–  Push the protective housing over the engine control unit.
–  Install cover of protective housing using new shear bolts.
–  Tighten shear bolts evenly until heads shear off.
–  Hook the protective housing into the bulkhead and push the clips into the openings.
–  Install windscreen wiper arms and the cover for plenum chamber: → Electrical system; Rep. Gr.92
–  Adapt engine control unit → Vehicle diagnosis, testing and information system VAS 5051.
–  Then read fault memory of new engine control unit and erase fault memory if necessary → Chapter.
–  Carry out road test.
–  Read fault memory of engine control unit again.
Vehicles with no anti-theft secured engine control unit
  N24-1581
Removing
–  Switch off ignition.
–  Release connector 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 it to the left.
–  Fit connector and lock in position.
–  Adapt engine control unit → Vehicle diagnosis, testing and information system VAS 5051.
–  Then read fault memory of new engine control unit and erase fault memory if necessary → Chapter.
–  Carry out road test.
–  Read fault memory of engine control unit again.
  S24-0337

Adapting components > < Engine control unit