Volkswagen Workshop Service and Repair Manuals

Bleeding fuel system   Note t  In order to prevent damage to the catalytic converter, the fuel system without return pipe must be bled after working on the fuel pipes or the fuel filter. The vehicle must not be started before bleeding. t  Observe rules for cleanliness → Chapter. Special tools and workshop equipment required

t  Remote control -V.A.G 1348/3 A- t  Adapter cable -V.A.G 1348/3-3-

t  Diesel extractor -VAS 5226- t  Adapter -V.A.G 1318/20- t  Adapter -V.A.G 1318/20–1-   WARNING The fuel supply line is under pressure! Wear eye protection and protective clothing to avoid injuries and skin contact. Before loosening hose connections, wrap a cloth around the connection. Then release pressure by carefully pulling hose off connection.

–  Remove cover -arrow- from bleed valve.

–  Turn valve (on T-piece) anti-clockwise until it is entirely open. –  Screw adapter -V.A.G 1318/20–1- onto adapter -V.A.G 1318/20-. –  Screw adapter -V.A.G 1318/20- hand tight onto bleeder valve.

–  Connect hose from diesel extractor -VAS 5226- as illustrated. –  Turn valve on T-piece clockwise into bleed valve to stop. –  Check adapter and hose connections for leaks.   Note The fuel pump is activated via the final control diagnosis.

–  Connect vehicle diagnosis tester as follows: –  Push diagnostic cable connector onto diagnostic connection in driver footwell. –  Switch on ignition. –  Press buttons on display one after the other for Vehicle self-diagnosis, Engine electronics and Final control diagnosis. –  Press right arrow button on display to actuate fuel pump. –  End final control diagnosis when fuel flows free of air bubbles from bleed valve.

–  Turn valve (on T piece) anti-clockwise until it is entirely open again. –  Clamp off hose from diesel extractor -VAS 5226- (e.g. using hose clips up to 25 mm -3094-) and pull it off adapter -V.A.G 1318/20–1-. –  Unscrew adapter -V.A.G 1318/20- from bleed valve.

–  Screw cover -arrow- onto bleed valve again.