Evaporative Emissions System: Testing and Inspection
OPERATION CHECKFig. 160 System Check:
NOTE: Check condition of wiring harness and/or vacuum lines and connectors before checking sensors or switches.
1. Warm engine to operating temperature.
2. Run at idle.
3. Disconnect vacuum hose from solenoid valve and verify that no vacuum is felt at valve.
4. If not as specified, check valve.
SOLENOID VALVE CHECK
1. Disconnect vacuum hoses from valve.
2. Verify that no air can pass through valve.
Fig. 118 Solenoid Valve Test:
3. Unplug valve connector and connect 12V and a ground to valve terminals.
4. Verify that air can pass through.
5. If not as specified, replace valve.