Double Check-Valve, Checking

Double Check-Valve, Checking

Special tools, testers and auxiliary items required
- Hand vacuum pump VAS 6213







- Disconnect connectors from evaporative emission (EVAP) canister purge regulator valve N80 and low fuel pressure sensor G410 - arrows -.
- Pull off evaporative emission (EVAP) canister purge regulator valve N80 - B - from hose - A -.







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







- Connect hand vacuum pump VAS 6213 on hose to double check-valve - arrow -.
- Operate hand vacuum pump VAS 6213 several times, vacuum must build up.

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