HEXA

ENGINE 177 7. INLET METERING VALVE ( IMV) This controls fuel flow into pumping element in order to control rail pressure. This sensor is in built with HP Pump. The inlet metering valve (IMV) ensures the filling of the high pressure pump. The IMV valve is normally open therefore Zero current shows a fully open sta- tus for the valve. The higher the current the further driven closed is the Valve. This output is driven by a Low side PWM signal. CONNECTOR DETAIL: Pinout Details: PIN NO DESCRIPTION 1 Inlet metering valve out put 2 EMS ECU main relay supply INSPECTION: 1. Measure the resistance between the two IMV connector terminals; it should be 5.44 ohms. CAUTION: Inlet Metering Valve (IMV) Sensor Reset need to be activated in Diagnostic Tool whenever HP pump i s changed. 8. VENTURI It is an integral part of High pressure pump. It has inlet & outlet connections. One connection comes from injector back leak circuit and another from the HP pump (back leak) the third connection goes to the fuel tank ( return Line ), in between there is a "T" connector which goes to the fuel filter. 9. RAIL PRESSURE SENSOR This sensor is fitted on the fuel rail and gives a close loop control of the rail pressure. Fuel is main- tained at a high pressure in the fuel rail depending on requirement of the engine. CONNECTOR DETAILS NOTE The rail pressure sensor should not be removed from the rail. In case the sensor is faulty consult LIS/ Delphi Service Engineer.