Tacoma, T100 & 4Runner
- Turn ignition off. Disconnect electrical connector from airflow meter. Airflow meter is located between air intake hose and upper cap on air cleaner assembly. Remove airflow meter and note airflow meter terminal identification. See Fig 1-11.
- Using ohmmeter, check resistance between terminals E2 and THA. Resistance should be within specification in relation to the temperature. See AIRFLOW METER RESISTANCE table. Replace airflow meter if resistance is not within specification.
- To test airflow meter operation, ensure electrical connector is installed on airflow meter. Connect voltmeter leads to proper terminals on the airflow meter with electrical connector installed. See Fig 4-14.
- Turn ignition on. Apply air into airflow meter and note voltage reading. See Fig 4-14. While air is being applied, voltage reading should fluctuate. Replace airflow meter if voltage does not fluctuate. Remove voltmeter.
AIRFLOW METER RESISTANCE
| Temperature | Ohms | |
|---|---|---|
| Avalon, Camry & Sienna | ||
| -4°F (-20°C) | 14,600-17,800 | |
| 68°F (20°C) | 2210-2690 | |
| 140°F (60°C) | 290-350 | |
| Land Cruiser & LX470 | ||
| -4°F (-20°C) | 12,500-16,900 | |
| 68°F (20°C) | 2190-2670 | |
| 140°F (60°C) | 500-680 | |
| Tacoma, T100 & 4Runner | ||
| -4°F (-20°C) | 10,000-20,000 | |
| 32°F (0°C) | 4000-7000 | |
| 68°F (20°C) | 2000-3000 | |
| 104°F (40°C) | 900-1300 | |
| 140°F (60°C) | 400-700 | |
| 176°F (80°C) | 200-400 | |