Oil Pressure Switch On-Vehicle Inspection
Precautions: General safety (00)
1)Remove exhaust manifold cover. 
CAUTION:
CAUTION:
Touching a hot exhaust system component will cause a burn.
Do not perform any service work on and around the exhaust system until the exhaust system is cool.
2)Remove oil pressure switch cover (1).
3)Disconnect oil pressure switch lead wire (1).
4)Check for continuity between oil pressure switch terminal (2) and cylinder block (3) as shown.
If check result is not as specified, replace oil pressure switch (4).
If check result is not as specified, replace oil pressure switch (4).
Oil pressure sensor specification
During engine running: No continuity
At engine stop: Continuity exists