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 . Replace IAT sensor if resistance is not within specification.
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE
| Temperature: °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 |