Intake Air Temperature Sensor
A malfunction in Intake Air Temperature (IAT) sensor can set a DTC. For testing procedures and specifications, see DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 2.0L TRACKER article or DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 2.5L TRACKER article. An out-of-calibration IAT sensor may not set a DTC. Use the following procedure to test sensor calibration.
Locate and remove IAT sensor from air cleaner assembly. Using DVOM, measure resistance of IAT sensor at specified temperatures. See INTAKE AIR TEMPERATURE SENSOR RESISTANCE table. If resistance is not within specification, replace IAT sensor.
INTAKE AIR TEMPERATURE SENSOR RESISTANCE (1)
| Temperature - °F (°C) | Ohms | ||
|---|---|---|---|
| 176 (80) | 315 | ||
| 158 (70) | 435 | ||
| 140 (60) | 580 | ||
| 122 (50) | 810 | ||
| 113 (45) | 940 | ||
| 104 (40) | 1150 | ||
| 95 (35) | 1360 | ||
| 86 (30) | 1600 | ||
| 77 (25) | 2000 | ||
| 68 (20) | 2400 | ||
| 59 (15) | 3000 | ||
| 50 (10) | 3600 | ||
| 41 (5) | 4600 | ||
| 32 (0) | 5700 | ||
| 23 (-5) | 7400 | ||
| 14 (-10) | 9800 | ||
| 5 (-15) | 12,700 | ||
| -4 (-20) | 16,000 | ||
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