Test N: The Low Oil Pressure Warning Indicator Is Never/Always On

PINPOINT TEST N: THE LOW OIL PRESSURE WARNING INDICATOR IS NEVER/ALWAYS ON

Normal Operation
The engine oil pressure switch is a normally open switch that is hardwired to the instrument cluster (IC) through circuit CMC24 (GY). When the oil pressure is within normal ranges, the engine oil pressure switch closes and grounds the signal to the instrument cluster (IC), and the instrument cluster (IC) turns off the low oil pressure warning indicator. When engine oil pressure is low, the engine oil pressure switch opens, removing the ground signal to the instrument cluster (IC), and the instrument cluster (IC) illuminates the low oil pressure warning indicator.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Base engine concern
- Engine oil pressure switch
- Instrument cluster (IC)

N1-N2:

N2-N6:

N6-N7: