Diesel Data: Automotive Repair

VSV For Pressure Switching Valve

VSV FOR PRESSURE SWITCHING VALVE

INSPECTION

1. REMOVE CHARCOAL CANISTER
2. REMOVE VSV







3. INSPECT VSV FOR OPEN CIRCUIT
Using an ohmmeter, check that there is continuity between the terminals.
If there is no continuity, replace the VSV.




4. INSPECT VSV FOR GROUND
Using an ohmmeter, check that there is no continuity between each terminal and the body.
If there is continuity, replace the VSV.

5. INSPECT VSV OPERATION




a. Check that the air flows with difficulty from port E to F.




b. Apply battery positive voltage across the terminals.
c. Check that the air flows from port E to F.
If operation is not specified, replace the VSV.

6. REINSTALL VSV
7. REINSTALL CHARCOAL CANISTER