SPROCKET GP 1686727 - Caterpillar

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. Refer to the diagnostic calibration procedure Troubleshooting, "Anolog Sensor - Calibrate".Right Turbocharger Compressor Inlet Pressure Sensor - The sensor is used in conjunction with the atmospheric pressure sensor to determine if the engine air filter is plugged. The sensor indicates if the right turbocharger compressor inlet has a restriction. The sensor output is a DC voltage between 0.2 VDC and 4.8 VDC that varies with right turbocharger compressor inlet pressure. The operating range of the sensor is 0.0 kPa to 111 kPa (0.0 psi to 16 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. Refer to the diagnostic calibration procedure Troubleshooting, "Anolog Sensor - Calibrate".Turbocharger Compressor Outlet Pressure Sensor - The sensor is used to obtain boost pressure. Boost pressure is used to control the ratio of fuel to air during acceleration. The ECM limits the amount of fuel that is injected, based upon inlet manifold pressure. Information in the ECM defines the relationship between the manifold pressure and the fuel ratio control limit (FRC). The operation is similar to the fuel ratio control on an engine with a mechanical governor. The sensor output is a DC voltage between 0.2 VDC and 4.8 VDC that varies with turbocharger outlet pressure. The operating range of the sensor is 0.0 kPa to 452 kPa (0.0 psi to 65 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. Refer to the diagnostic calibration procedure Troubleshooting, "Anolog Sensor - Calibrate".Atmospheric Pressure Sensor - The sensor is used to provide an atmospheric pressure signal to the ECM. If the atmospheric pressure sensor should fail, the right turbocharger compressor inlet pressure sensor is used as a substitute. If the right turbocharger compressor inlet pressure sensor should fail, the left turbocharger compressor inlet pressure sensor is used as a substitute. The sensor output is a DC voltage between 0.2 VDC and 4.8 VDC that varies with atmospheric pressure. The operating range of the sensor is 0.0 kPa to 111 kPa (0.0 psi to 16 psi). The sensor is used to calibrate the other pressure sensors 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, a diagnostic message will be generated and the engine may be derated. Refer to the diagnostic calibration procedure Troubleshooting, "Anolog