Volkswagen Workshop Service and Repair Manuals

Removing and installing anti-theft engine control unit   Note t  If you wish to renew the engine control unit, connect the vehicle diagnosis tester and perform the guided function „Renewing engine control unit“. t  The shear-head bolt threads may coated with locking compound. To simplify removing, the shear-head bolts can be heated using hot air blower -VAS 1978/14-. When doing this, ensure that no adjacent cables, connectors or components are damaged! Removing –  Switch off ignition. Golf, Eos, Scirocco: –  Remove wiper arms, plenum chamber cover and plenum chamber bulkhead → Body; Rep. gr.50. Passat, CC: –  Remove wiper arms and plenum chamber cover → Body; Rep. gr.64. All:

–  Press retaining frame down in -direction of arrow- and remove engine control unit.

–  Unscrew shear-head bolts -arrows- using pliers.

–  Insert screwdriver between both locking plates -arrow-. –  Carefully press screwdriver in direction of -arrow- and bend retaining bow -1- upwards at the same time.

–  Bend retaining bar -1- in direction of -arrow- until it can be pulled off connector.

–  Push connector locking devices in direction of -arrow-, and pull connectors off. Installing

–  Fit connectors to engine control unit and slide locking devices onto stop in direction of -arrow-.

–  Fit retaining bow -1- onto connectors and press it in direction of -arrow-. –  Guide pin -2- to stop into hole on engine control unit.

–  Secure retaining bow with shear-head bolts to engine control unit -arrows-. –  Tighten shear-head bolts evenly until heads shear-head off -arrows-.

–  Insert engine control unit into retaining frame and press retaining frame upwards in -direction of arrow- Golf, Eos, Scirocco: –  Install wiper arms, plenum chamber cover and plenum chamber bulkhead → Body; Rep. gr.50. Passat, CC: –  Install wiper arms and plenum chamber cover → Body; Rep. gr.64.