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Exhaust system > < Engine control unitJ623

Leon Mk1

Checking dual non-return valve
Checking dual non-return valve
Special tools and workshop equipment required
   
t  Manual vacuum pump -VAS 6213-
t  Auxiliary cable kit -V.A.G 1594C-
Test condition
l  The activated charcoal filter solenoid valve 1 -N80- has been checked with a vehicle diagnosis tester and is OK.
–  Carefully pull off engine cover panel.
  N24-10282
–  Unplug connector -1- and detach breather hose -3- from activated charcoal filter solenoid valve 1 -N80--2-.
  A24-10582
–  Move the sliding ring -1- of the manual vacuum pump -VAS 6213- in position -A- for "underpressure".
  N24-10282
–  Connect hand vacuum pump -VAS 6213- to activated charcoal filter solenoid valve 1 -N80-.
–  Connect contacts of the solenoid valve -1- to the battery using test leads. This will open activated charcoal filter solenoid valve 1 -N80-.
Then immediately operate hand vacuum pump -VAS 6213- several times.
l  A vacuum must build up.
–  Again disconnect battery to cut off current supply.
If a vacuum does not build up:
–  Replace double non-return valve -1-.
Dual non-return valve, activated charcoal filter solenoid valve 1 -N80- and plastic hoses are combined as one unit. The vacuum pipe must be dismantled for replacing.
  A24-10583

Exhaust system > < Engine control unitJ623