Volkswagen Workshop Service and Repair Manuals

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

• ◆ V.A.G 1390 Hand vacuum pump

Test sequence

• ‒ Pull vacuum hose off (mechanical) exhaust gas recirculation valve.

• ‒ → Connect hand vacuum pump V.A.G 1390 to valve.
• ‒ Operate pump.
       Membrane must move in direction of
       vacuum connection
  (establish by feeling from below).
• ‒ Pull hand vacuum pump hose off (mechanical) exhaust gas recirculation valve.
       The valve must clearly be heard to close (membrane moves
       in direction of exhaust manifold).