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| Then connect the hand vacuum pump -VAS 6213- and the vacuum tester -V.A.G 1368- to the venting line as shown. |
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| Set vacuum tester to -A/B- position. |
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| Operate the manual vacuum pump -VAS 6213- a few times. Vacuum must not build up. |
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| Check the ventilation opening on the active carbon filter for soiling and clean if necessary. |
If a vacuum does not build up: |
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| Temporarily seal ventilation opening and operate vacuum pump again several times. A vacuum must build up. |
If a vacuum does not build up: |
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| Renew active carbon filter. |
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