PAIR Vacuum Switching Valve
- Disconnect electrical connector from PAIR VSV. See Figure-50. Using ohmmeter, ensure resistance between electrical terminals of VSV is within 30-50 ohms @ 68°F (20°C).
- Ensure no continuity exists between each electrical terminal and body of VSV. Apply air pressure to port "E". Ensure air passes out air filter. Perform STEP 1. See Fig 1.
- Connect battery voltage and ground to VSV terminals. Apply air pressure to port "E". Ensure air passes out port "F". Perform STEP 2. See Fig 1. Replace VSV if defective.