EVAP Pressure Switching Solenoid Inspection

EVAP PRESSURE SWITCHING SOLENOID INSPECTION

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




1. Remove the EVAP pressure switching solenoid.
2. Use a DMM in order to measure the resistance of the EVAP pressure switching solenoid.

Measure
The EVAP pressure switching solenoid resistance is 37-44 ohms at 20°C (68°F).

3. Replace the EVAP pressure switching solenoid if the resistance is not within the specified range. The solenoid will damage the PCM, if the resistance value is less than 27 ohms.




4. Check for continuity on each terminal to the valve body.
5. Replace the EVAP pressure switching solenoid if continuity is present.




6. Blow air into the inboard port. The air should NOT flow through the valve and out of the outboard port.
7. Apply battery voltage across the terminals of the EVAP pressure switching solenoid.
8. Blow air into the inboard port and air should flow through the valve and out of the outboard port.
9. Replace the EVAP pressure switching solenoid if the solenoid failed either test.