Oil Pressure Switch (For Fuel Pump): Description and Operation

Oil pressure monitoring

Two oil pressure switches are responsible for monitoring the oil pressure. Two switches are required to monitor the pressure in order to control changes to a high or a low oil pressure. The switches are not integrated in the instrument cluster. The engine control unit evaluates the signals from the oil pressure switches. If it becomes necessary to illuminate the warning lamp in the instrument cluster, a message is sent to the CAN data bus and the warning lamp in the instrument cluster is activated.

Oil pressure switch for reduced oil pressure







The switch for reducing the oil pressure closes when the oil pressure reaches 13 psi (0.9 bar). If the oil pressure falls below this range, the switch opens and the engine control module activates the warning lamp in the instrument cluster via the CAN bus. The oil pressure switch is installed in the main oil duct upstream of the oil filter module.

Oil pressure switch







The oil pressure switch operates within a pressure range that is higher than the switching threshold of the oil pressure control valve. The switch closes at an oil pressure of 36 psi (2.5 bar). The signal that the engine control module receives from the oil pressure switch indicates that the oil pump is generating the required oil pressure. The oil pressure switch is installed in the pressure oil duct downstream of the oil filter in the oil filter module.