UENR0623-02 43 Engine Operation Illustration 39 g03360405 Schematic for the DPF differential pressure sensor for the 854E-E34TA (model JR) engine and 854F-E34T (model JS) engine The boost pressure sensor is an active sensor. The boost pressure sensor provides the ECM with a measurement of inlet manifold pressure to control the air/fuel ratio. This will reduce the engine smoke during transient conditions. An engine oil pressure switch is installed to the engine. While the engine is running and oil pressure is detected, the switch will be open. When no oil pressure is detected, the switch will be closed. The ECM can warn the operator of possible conditions that can damage the engine.
This includes the detection of an oil filter that is blocked. The operating range for the engine oil pressure switch . . . . . . . . . . 30 kPa to 90 kPa ((4 psi to 13 psi))