9C
Oil Pressure Switch Inspection
Use an ohmmeter to check switch continuity.
Oil pressure switch specification
During engine running: No continuity (∞ Ω)
At engine stop: Continuity (0 Ω)
For M13 engine model
1. To wiring harness 3. Oil pressure switch
2. Cylinder block      
For K9K engine model
1. Oil pressure switch 2. Cylinder block