Ford ECT/IAT Sensor Voltage & Resistance Chart - Temperature Values Table

This document is a reference table listing expected Engine Coolant Temperature (ECT) and Intake Air Temperature (IAT) sensor values across a range of temperatures. The left side gives temperature in both Fahrenheit (248°F down to 50°F) and Celsius (120°C down to 10°C) in 10°C increments. The right side lists the corresponding sensor signal voltage (in volts) and sensor resistance (in kilo-ohms). Values range from 0.27 V and 1.18 K ohms at 248°F/120°C (fully hot) to 3.51 V and 58.75 K ohms at 50°F/10°C (cool). The table demonstrates the negative temperature coefficient behavior of the sensor: as temperature rises, resistance and voltage drop. A technician can use this chart to diagnose an ECT or IAT sensor by measuring its resistance with an ohmmeter or the signal voltage with the sensor connected, then comparing the reading against the value expected for the current engine or intake air temperature. Readings that deviate significantly from the chart indicate a faulty sensor, wiring problem, or reference-voltage issue. The document itself carries no year, model, or part-number information; it was uploaded as part of a set of 1996-1997 Ford Taurus diagnostic documents.