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DOUBLE CHECK-VALVE, CHECKING Audi A4 B8

2.0l - Multiport Fuel Injection - Engine Code(s): Caeb (sedan) 2 illustrations ~172 words

DOUBLE CHECK-VALVE, CHECKING

Special tools and workshop equipment required

  1. Hand Vacuum Pump VAS 6213
  2. Connector Test Set V.A.G 1594C

Test Conditions

  1. The Evaporative Emission (EVAP) canister purge regulator valve 1 -N80- was tested with the vehicle diagnostic tester and is OK.

Remove the engine cover.

Disconnect the connector -1- and the ventilation hose -arrow- from the EVAP canister purge regulator valve.

Set the slide ring -1- on the VAS 6213 to the -A- position for "vacuum."

Scheme 131

Scheme 131
Scheme 131

Connect the VAS 6213 to the EVAP canister purge regulator valve 1.

Scheme 132

Scheme 132
Scheme 132

Using the lines, connect the contacts on the EVAP canister purge regulator valve 1 -1- to the battery. This opens the EVAP canister purge regulator valve 1.

Then activate the VAS 6213 several times.

  1. Vacuum must build up.

Disconnect the battery again (interrupt the power supply).

No vacuum

Replace the double check-valve -1-.

The double check-valve, the EVAP canister purge regulator valve 1 and the plastic hoses are a single component and can only be replaced together.