21874009 Volvo.Penta Rocker arm, intake

The Electronic Control Module (ECM) supplies 5.0 0.2 VDC from the ECM connector J1/P1 to each analog sensor connector. The sensor return line connects to the ECM connector J1/P1. The analog sensor supply is output short circuit protected. A short circuit to the battery will not damage the circuit inside the ECM.Note: The Analog Sensors are not protected from overvoltage. A short from the analog supply line to the + Battery supply may damage the sensors. If CID-FMI 262-03 is logged, it is possible that all of the analog sensors have been damaged. Repair the Analog Sensor Supply and check for any "ACTIVE" sensor diagnostic codes in order to determine if a sensor has failed.Note: The Engine Monitoring System can be programmed by dealers and/or customers. Dealers and/or customers can monitor customized warnings, derates, shutdown override setpoints, and delay times using the Caterpillar Electronic Technician (ET). Customized parameters may affect the behavior of the ECM. The behavior of the ECM may vary from the description that is given in this system operation section. You may refer to Troubleshooting, "Engine Monitoring System" in order to determine if there are any parameters that are affecting engine operation.The following list contains a description of the analog sensors that are found on the engine.Aftercooler Temperature Sensor - The ECM uses the signal from the sensor to monitor changes in system temperature. The ECM makes adjustments to the system's operating parameters as the temperature changes. This allows the engine to operate at optimal performance through a wide range of operating temperatures. The operating range of the sensor is −40 °C to 120 °C (−40 °F to 248 °F).Coolant Temperature Sensor - Cold Mode operation improves the engine starting ability. Cold Mode operation helps to control white smoke during cold starts. Cold Mode operation helps to improve warm up time of the engine. In Normal Mode, injection timing is varied as a function of engine speed and of load. The process of combustion is improved by controlling the injection timing in Cold Mode. Transient engine response is slower in Cold Mode operation. Cold Mode operation is activated when the engine water temperature is below 60 °C (140 °F). Cold Mode operation will remain active until water temperature rises above 63 °C (145 °F). The engine will alternate between Cold Mode and Normal Mode during operation, as engine temperature fluctuates. The operating range of the sensor is −40 °C to 120 °C (−40 °F to 248 °F).Filtered Fuel Pressure Sensor - The sensor is used in conjunction with the Unfiltered Fuel Pressure sensor to determine the restriction across the fuel filters. The sensor output is a DC voltage that varies with filtered fuel pressure between 0.2 VDC and 4.8 VDC. The sensor is located on the end cap of the fuel filter housing. The operating range of the sensor is 0.0 kPa to 1090 kPa (0.0 psi to 158 psi). The ECM calibrates the sensor within the first five seconds after power is applied to the ECM. The ECM checks the sensor value against an acceptable pressure range. If the pressure value is not in this range, the previous calibration will be used. A manual calibration of the