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Exhaust system > < Engine control unitJ623

Leon Mk1

Double non-return valve: check
Double non-return valve: check
Special tools and workshop equipment required
   
t  Manual vacuum pump -VAS 6213-, see equivalency → Anchor
t  Auxiliary measuring tool -V.A.G 1594C-, see equivalent → Anchor
Test condition
l  The solenoid valve 1 for the active carbon vessel -N80- has been checked with → Vehicle diagnostic tester and is okay.
–  Carefully remove engine cover → Chapter.
  N24-10282
–  Remove connector -1- and vent hose -3- from solenoid valve 1 for activated charcoal filter -N80--2- .
  A24-10582
–  Move the sliding ring -1- of the manual vacuum pump -VAS 6213- in position -A- for "underpressure".
  N24-10282
–  Connect manual vacuum pump -VAS 6213- to solenoid valve 1 for activated charcoal filter -N80- .
–  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.
l  A vacuum must build up.
–  Reconnect battery (interrupt power supply).
If a vacuum does not build up:
–  Replace double non-return valve -1-.
The double non-return valve, the solenoid valve 1 for the activated charcoal filter -N80- and the plastic hoses are component and cannot be replaced separately.
  A24-10583

Exhaust system > < Engine control unitJ623