Intake Air Temperature (IAT) Sensor
- Disconnect IAT sensor connector. Turn ignition on. Check voltage between Red/Black wire terminals and ground. If voltage is not 4-5 volts, check wiring harness for open or short. If voltage is 4-5 volts, go to next step.
- Remove IAT sensor and place it in water with a thermometer. Heat water to specified temperature and check resistance. See INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE table. Replace IAT sensor if resistance is not within specification.
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE
| Temp. °F (°C) | Ohms |
|---|---|
| 32 (0) | 5400-6600 |
| 68 (20) | 2280-2870 |
| 104 (40) | 1060-1360 |
| 140 (60) | 530-700 |
| 176 (80) | 290-390 |
| 212 (100) | 160-230 |