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| Initially disconnect the vent hose -1- for the activated charcoal filter on the Magnetic valve 1 for the activated charcoal reservoir -N80--2-. |
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| Then, connect the Vacuum pump - VAG 1390- or Vacuum pump -VAS 6213- and the Vacuum gauge -VAG 1368- to the hose -1-, as shown. |
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| Place the Vacuum gauge -VAG 1368- in -A/B- position. |
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| Operate the Vacuum pump -VAG 1390- or Vacuum pump -VAS 6213- several times. No vacuum may be generated. |
| In case of vacuum formation: |
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| Check the ventilation opening -3- at the bottom of the activated charcoal filter -4- for dirt and, if necessary, clean it. |
| In case of absence of vacuum: |
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| Cover the ventilation opening -3- and operate again the Vacuum pump -VAG 1390- or Vacuum pump -VAS 6213- several times. Vacuum must be generated. |
| In case of absence of vacuum: |
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| Replace the activated charcoal filter. |
Note | If the fuel tank level is low, the Vacuum pump -VAG 1390- or Vacuum pump -VAS 6213- must be activated approximately 20...30 times. |
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| Replace the fuel reservoir nozzle lid. |
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