Volkswagen Workshop Service and Repair Manuals

Special tools, testers and auxiliary items

• ◆ Hand vacuum pump V.A.G 1390

Test sequence

• ‒ Pull vacuum hose off (mechanical) exhaust gas recirculation valve.
• ‒ Connect hand vacuum pump V.A.G 1390 to valve.
• ‒ → Operate pump.
       Membrane rod must move towards vacuum connection
       (observe membrane rod through opening -arrow-).
• ‒ Pull vacuum pump hose off exhaust gas recirculation valve.
  The valve must clearly be heard to close (membrane rod moves towards intake manifold).