Volkswagen Polo Workshop Service and Auto Repair Manuals

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

• ◆ → V.A.G 1368 Vacuum tester

• ◆ → V.A.G 1390 Hand vacuum pump

Test conditions

• ● Ignition must be switched off

Test sequence

• ‒ Remove air cleaner , Fig. 3 .
• ‒ → Remove vacuum valve -1- => Page 24-17 , item 3.
• ‒ Then connect hand vacuum pump V.A.G 1390 and vacuum tester V.A.G 1368 as shown (arrow on vacuum valve -1- points to V.A.G 1368).
• ‒ Set vacuum tester to -A/B- position.
• ‒ Operate hand vacuum pump V.A.G 1390 several times.
       Vacuum must not
  build up.

Note:

The vacuum valve is open in the rest position.

If vacuum builds up:

• ‒ Renew vacuum valve.

If vacuum does not build up:

• ‒ → Close connection -2- on vacuum valve.
• ‒ Hold vacuum valve in the hand.
• ‒ Operate V.A.G 1390 several times, until the valve closes
       with a noticeable click.

Note:

The vacuum valve closes at a vacuum between 250...350 mbar.

If vacuum valve does not close:

• ‒ Renew vacuum valve.