Oil Pressure Sensor: Description and Operation
OIL PRESSURE SENSOR - PCM INPUTThe 2-wire, electrical/mechanical engine oil pressure sensor (sending unit) is located in an engine oil pressure gallery.
The oil pressure sensor uses two circuits. They are:
- A signal to the PCM relating to engine oil pressure
- A sensor ground through the PCM's sensor return
The oil pressure sensor returns a voltage signal back to the PCM relating to engine oil pressure. This signal is then transferred (bussed) to the instrument panel on a CCD bus circuit to operate the oil pressure gauge and the check gauges lamp. Ground for the sensor is provided by the PCM through a low noise sensor return.