Audi Workshop Service and Repair Manuals

Special tools and workshop equipment required

• ◆ V.A.G 1390
• ◆ V.A.G 1526 A
• ◆ V.A.G 1527 B
• ◆ V.A.G 1594 A
• ◆ V.A.G 1598/31

Test sequence

• ● Final control diagnosis has been performed.

• ‒ → Remove oil dipstick -1- from guide tube.
• ‒ Remove engine cover -arrows-.
• ‒ Reinsert dipstick in guide tube.

• ‒ → Detach vacuum hose from vacuum unit -1- for exhaust gas recirculation.
• ‒ Connect hand vacuum pump V.A.G 1390 to valve.
• ‒ Actuate hand vacuum pump.
• ‒ The linkage of the exhaust gas recirculation changeover must move -arrow-

If the linkage does not move or only moves jerkily:

• ◆ The vacuum unit is defective
• ◆ If the changeover valve for exhaust gas recirculation is stiff