Engine Controls - Sensor Operating Range Charts: Introduction: Notes
Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a trouble code, but it may cause driveability problems.
NOTE:
Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE
| Temperature °F (°C) | Ohms |
|---|---|
| 0 (-18) | 14,650 |
| 19 (-7) | 8100 |
| 39 (4) | 4780 |
| 70 (21) | 2350 |
| 100 (38) | 1250 |
| 160 (71) | 400 |
| 210 (99) | 190 |
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE
| Temperature °F (°C) | Ohms |
|---|---|
| 0 (-18) | 14,800 |
| 19 (-7) | 8250 |
| 39 (4) | 5200 |
| 70 (21) | 2500 |
| 100 (38) | 1300 |
| 160 (71) | 450 |
| 210 (99) | 200 |