Double Check-Valve, Checking

Double Check-Valve, Checking

Special tools, testers and auxiliary items required

• Hand Vacuum Pump (VAS 6213)

- Disconnect the connectors - arrows - from the EVAP canister purge regulator valve 1 (N80) and the low fuel pressure sensor (G410).






- Remove the EVAP canister purge regulator valve 1 - B - from the hose - A -.

- Set the slide ring - 1 - on the hand vacuum pump (VAS 6213) to position - A - (vacuum).






- Connect the hand vacuum pump (VAS 6213) to the hose to the double check-valve - arrow -.






- Operate the hand vacuum pump (VAS 6213) several times, vacuum must build up.

If no vacuum builds up, replace the double check-valve.