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| Connect hand vacuum pump -VAS 6213- to activated charcoal filter solenoid valve 1 -N80-. |
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| Connect contacts of activated charcoal filter solenoid valve 1 -N80--1- to battery using test leads. This will open activated charcoal filter solenoid valve 1 -N80-. |
Then immediately operate hand vacuum pump -VAS 6213- several times. |
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| Vacuum should build up. |
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| Again disconnect battery to cut off current supply. |
If vacuum does not build up: |
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| Renew dual non-return valve -1-. |
Dual non-return valve, activated charcoal filter solenoid valve 1 -N80- and plastic hoses are combined as one unit and can only be renewed together. |
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