The normally closed solenoid valve assembly consists of 2 vacuum ports with an atmospheric vent. The valve assembly can be with or without control bleed. The outlet port of the valve is opened to atmospheric vent and closed to the inlet port when de-energized. When energized, the outlet port is opened to the inlet port and closed to atmospheric vent. The control bleed is provided to prevent contamination entering the solenoid valve assembly from the intake manifold.
- The ports should flow air when the solenoid is energized.
- Check the resistance at the solenoid terminals with an ohmmeter. The resistance should be 51-108 ohms.
- If the resistance is not as specified, replace the solenoid.
REMOVAL & INSTALLATION
The valve can be expected to have a very small leakage rate when energized or de-energized. This leakage is not measurable in the field and is not detrimental to valve function.
- Disconnect the negative battery cable.
- Disconnect the electrical connector and the vacuum lines from the solenoid valve.
- Remove the mounting bolts and remove the solenoid valve.
- Installation is the reverse of the removal procedure.