IAT Sensor Resistance
On all models, IAT sensor is part of Mass Airflow (MAF) sensor. Turn ignition off. Disconnect MAF sensor connector. Measure resistance between MAF sensor terminals THA and E2. See Fig 1 or Fig 2. Replace MAF sensor if resistance is not as specified. See appropriate IAT SENSOR RESISTANCE table.
IAT SENSOR RESISTANCE (ES300)
| Ambient Temperature °F (°C) | Ohms |
|---|---|
| -4 (-20) | 14,600-17,800 |
| 68 (20) | 2210-2690 |
| 140 (60) | 290-350 |
IAT SENSOR RESISTANCE (GS300, GS400, LS400, SC300 & SC400)
| Ambient Temperature °F (°C) | Ohms |
|---|---|
| -4 (-20) | 13,600-18,400 |
| 68 (20) | 2210-2690 |
| 140 (60) | 493-667 |