The CMP sensor is a Hall-effect sensor. The PCM converts the information from the sensor into a square wave which indicates the 6 targets on the target wheel. The PCM uses CMP sensor for diagnostics and as a backup for the CKP sensor in the event of CMP failure.
The CKP sensor is a Hall-effect sensor. The PCM converts the information from the sensor into a square wave which indicates the tooth edges of the magnetic trigger wheel. There are 2 teeth removed to help the PCM to find the crankshaft position therefore knowing piston position within each cylinder. The PCM uses the CKP… Read More »
The EGRVP sensor is a 3-wire non-contacting position sensor based upon the magneto-resistive effect (that is, a non-contacting Hall-effect). The PCM supplies a 5 volt reference (VREF) signal which the EGR position sensor uses to produce a linear analog voltage indicating EGRVP. The PCM uses the EGRVP sensor to determine EGRVP and compares it to… Read More »
The EGT sensors are a Resistance Temperature Detector (RTD) type sensor. The electrical resistance of the sensor increases as the temperature increases, and resistance decreases as the temperature decreases. There are four EGT sensors used as part of the regeneration operation reductant injection. IDS: EGT11 (temperature) and EGT11_V (volts), EGT12 (temperature) and EGT12_V (volts), EGT13… Read More »
The EGR cooler outlet temperature sensor is a 2 wire thermistor-type sensor. The PCM supplies 5 volts to the EGR cooler outlet temperature sensor circuit. The sensor changes the internal resistance as the temperature changes. This sensor has a two step pull-up resistor. Notice the two temperature curves with voltage. The PCM uses the EGR… Read More »
The FRT is a 2 wire thermistor-type sensor. The PCM supplies 5 volts to the FRT sensor circuit. The sensor changes the internal resistance as the fuel temperature changes. The PCM uses the fuel temperature for fuel delivery correction and determine fuel pressure control mode (PCV or VCV mode). IDS: FRT (volts) and FRT_A (temperature)
The CAC temperature sensor is a 2 wire thermistor-type sensor. The PCM applies 5 volts to the CAC temperature sensor circuit. The sensor changes the internal resistance as the air temperature changes. The PCM uses the CAC temperature sensor as an input in determining turbocharger, EGR, fuel control and regeneration. IDS: CAC_T (temperature) and CAC_V… Read More »
The IAT sensor is a 2-wire thermistor-type sensor. The PCM applies 5 volts to the IAT sensor circuit. The sensor changes the internal resistance as the intake air temperature changes. The intake air temperature is used for MAF sensor correction and an input into the engine controls, particularly, engine coolant fan operation and for diagnostics.… Read More »
The AAT sensor is a 2-wire thermistor-type sensor. The PCM applies 5 volts to the AAT sensor circuit. The sensor changes the internal resistance as the ambient air temperature changes. The AAT sensor is used as an input into the engine controls, particularly, engine coolant fan operation, glow plug system control and for diagnostics. The… Read More »
The ECT2 sensor is a 2 wire thermistor-type sensor. The PCM applies 5 volts to the ECT2 sensor circuit. The sensor changes the internal resistance as the coolant temperature changes. The PCM uses the ECT2 sensor to monitor EGR cooler effectiveness by measuring the amount of heat being absorbed by the coolant. The ECT2 sensor… Read More »