EVAP Canister Purge Valve Inspection

EVAP CANISTER PURGE VALVE INSPECTION

CAUTION: Refer to Fuel Vapors in Evaporative Emission (EVAP) Components Caution in Service Precautions.




1. Remove the EVAP canister purge valve.
2. Use a DMM in order to measure the resistance of the EVAP canister purge valve.

Measure
The EVAP canister purge valve resistance should be 27-33 ohms at 20°C (68°F).

3. Replace the EVAP canister purge valve if the resistance is not within the specified range. The solenoid will damage the powertrain control module (PCM) if the resistance value is less than 27 ohms.
4. Check the PCM and replace if necessary.




5. Check for continuity of each terminal to the valve body.
6. Replace the EVAP canister purge valve if continuity is present.




7. Blow air into one of the ports. The air should NOT flow through the opposite port.
8. Apply battery voltage across the terminals of the EVAP canister purge valve.
9. Blow air into the one port. The air should flow easily to the opposite port.
10. Replace the EVAP canister purge valve if the valve failed either test.