Oil Pressure Switch
The function of the oil pressure switch is to warn the driver about low oil pressure via the driver information module (DIM).
The oil pressure switch has a pressure sensing switch which is powered (signal) by the engine control module (ECM) and grounded in the cylinder block. The oil pressure switch is affected by the oil pressure of the engine.
When the oil pressure exceeds a certain value, the switch in the oil pressure switch will open. A high signal is then sent to the engine control module (ECM).
If the oil pressure is below a certain value, the switch in the oil pressure switch will close and a low signal will be sent to the engine control module (ECM). The engine control module (ECM) then transmits a CAN signal to the driver information module (DIM) to light the indicator lamp for low oil pressure.
The oil pressure sensor is on the cylinder block.
The engine control module (ECM) cannot diagnose the oil pressure switch.