Diesel Data: Automotive Repair

Canister Purge Control Valve: Testing and Inspection

Fig. 39 Testing purge control valve:







1. Disconnect hose (A) from purge control valve, Fig. 39.
2. Disconnect and plug hose (B), then start engine and allow to idle.
3. Connect a suitable hose (C) to port (D), then blow through valve from hose (C). Air should not pass through valve.
4. Remove plug from hose (B) and connect hose to valve port (E) as shown, Fig. 39.
5. Blow through valve from hose (C). Air should now freely pass through valve. If air does not flow, replace valve.