• The EGRVP sensor is a three (3) wire potentiometer type sensor. • The ECM supplies a 5 volt reference voltage that the EGRVP uses to produce a linear analog voltage that indicates the amount of movement of the valve. • The ECM monitors EGRVP as the engine is operating to modulate the… Read More »
• The ECT sensor is a two (2) wire thermistor sensor. • The ECT sensor’s internal thermistor forms a voltage divider with a pullup resistor inside the ECM. • The ECT sensor changes resistance when exposed to different temperatures. • When the temperature of the coolant decreases, the resistance of the thermistor increases and the… Read More »
• The camshaft position signal source is a magnetic pickup sensor mounted on the left front side of the engine block. • The sensor reacts to a peg, pressed into the camshaft at the front of the engine. • The peg will pass the sensor once per camshaft revolution, the sensor will produce a single… Read More »
• The crankshaft position signal source is a magnetic pickup sensor mounted in the right front side of the engine block. • The sensor reacts to a trigger wheel positioned on the crankshaft. The trigger wheel is a 60 minus 2 tooth steel disk with 58 evenly spaced teeth… Read More »
• The ECM supplies a 5 volt reference signal which the Baro sensor uses to produce a linear analog voltage signal that indicates pressure. • The primary function of the Baro sensor is to provide altitude information so that the ECM can adjust timing, fuel quantity, glow plug on time, and turbocharger control. • The… Read More »
• The AP (Accelerator Pedal) is a three track pedal. The AP incorporates three potentiometers. Throughout the movement of the AP the resistance values of the three potentiometers must agree. During the movement of the AP if any of the three potentiometer readings do not agree, the check engine light will illuminate and the… Read More »
• The ECM sends a reference voltage (Vref) of 5.0 volts (external power) to the pressure sensors and 5.0 volts (internal power) to the temperature sensors, except for CMP and CKP which generate voltage through the collapse of a magnetic field. • The sensor signals… Read More »