Oil Pressure Switch
- Check the continuity between the terminal and the body with an ohmmeter.
If there is no continuity, replace the oil pressure switch.
- Check the continuity between the terminal and the body when the fine wire is pushed. If there is continuity even when the fine wire is pushed, replace the switch.
- If there is no continuity when a 50 kPa (7 psi) vacuum is applied through the oil hole, the switch is operating properly. Check for an air leak. If air leaks, the diaphragm is broken. Replace the switch.