The ECT sensor is a 2 wire thermistor-type sensor. The PCM applies 5 volts to the ECT sensor circuit. The sensor changes the internal resistance as the coolant temperature changes. The PCM uses the ECT sensor for engine temperature protection, input for EGR function, fuel control, and engine fan operation. The ECT sensor measures temperature… Read More »
The EOT sensor is a 2 wire thermistor-type sensor. The PCM applies 5 volts to the EOT sensor circuit. The sensor changes the internal resistance as engine oil temperature changes. The EOT sensor is used in operation of the cooling fan, VGT, and engine control plus diagnostics. The EOT sensor signal allows the PCM to… Read More »
The A/C pressure transducer is a 3 wire sensor. The PCM applies 5 volts to the A/C pressure transducer. The ground for the A/C pressure transducer is provided by the PCM. The output signal from the A/C pressure transducer changes depending on the pressure of the refrigerant. The A/C pressure transducer sends the voltage signal… Read More »
The fuel pressure switch provides input to the PCM when a low fuel pressure condition exists. The PCM notifies the customer via an instrument panel cluster warning and an engine derate occurs. IDS: LP_FUEL_SW (low/not low)
The MAF sensor uses a hot wire sensing element to measure the air flow rate entering the engine. The hot wire is maintained at a constant temperature. The temperature of the hot wire changes with varying air flow. The current required to keep the constant temperature is measured and converted to a voltage which is… Read More »
The DPF sensor is a 3-wire variable capacitance sensor. The PCM supplies a 5 volt reference (VREF) signal which the DPF pressure sensor uses to produce a linear analog voltage that indicates pressure. The DPF pressure sensor measures the exhaust pressure upstream of the diesel particulate filter. Used as part of the diesel particulate filter… Read More »
The FRP is a 3-wire variable capacitance sensor. The FRP produces a linear analog voltage that indicates pressure of the high pressure fuel system. The PCM monitors fuel rail pressure as the engine is operating to control fuel pressure. This is a closed loop function which means the PCM continuously monitors and adjusts for ideal… Read More »
The EP sensor is a 3-wire variable capacitance sensor. The PCM supplies a 5 volt reference (VREF) signal which the EP uses to produce a linear analog voltage that indicates pressure. The PCM monitors the EP sensor as an input into EGR operation for the delta pressure calculation. IDS: EP (pressure) and EP_V (volts)
The MAP sensor is a 3-wire variable capacitance sensor. The PCM supplies a 5 volt reference (VREF) signal which the MAP uses to produce a linear analog voltage that indicates pressure. The MAP sensor is used for turbocharger, EGR, and regeneration control. IDS: MAP (volts) and MAP_A (pressure)
The BARO sensor is internal to the PCM. The PCM supplies a 5 volt reference signal (VREF) which the BARO sensor uses to produce a linear analog voltage that indicates pressure. The PCM uses the BARO sensor to determine atmospheric pressure for fuel control, timing, and turbocharger control. IDS: BARO (volts) and BARO (pressure)