Oil Pressure Switch

1. Check the continuity between the terminal and the body with an ohmmeter.

   If there is no continuity, replace the oil pressure switch.

   Fig 1: Checking Oil Pressure Switch Continuity

   Courtesy of HYUNDAI MOTOR CO.
2. 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.
3. 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 air leakage. If air leaks, the diaphragm is broken Replace it.

   Fig 2: Checking Oil Pressure Switch Continuity With Fine Wire

   Courtesy of HYUNDAI MOTOR CO.

Operation Pressure 

Oil pressure switch :

80 kpa (0.8 kg / cm² , 11.4 psi) or more @ 700 rpm