Evaporative Vapor Pressure Sensor: Testing and Inspection

Inspect VSV for Pressure Switching Valve
1. Using an ohmmeter, check that there is continuity between the terminals.

Resistance: 30 - 36 ohm at 20 °C (68 °F)
If there is no continuity, replace the VSV.




2. Using an ohmmeter, check that there is no continuity between each terminal and the body.

If there is continuity, replace the VSV.




3. Check that air does not flow from ports E to F.




4. Apply battery positive voltage across the terminals.
5. Check that air flows from ports E to F. If operation is not as specified, replace the VSV.