All Models
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2003 Toyota Tundra, 2003 Toyota Tacoma, 2003 Toyota Sienna, 2003 Toyota Sequoia, and 2003 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
- Remove airflow meter. See AIRFLOW METER under ENGINE SENSORS & SWITCHES in REMOVAL & INSTALLATION - V6 & V8 article.
- Note identification of terminals E2 and THA on airflow meter. See Fig 1-Fig 4 . Using ohmmeter, check resistance between terminals E2 and THA on airflow meter. Resistance should be within specification in relation to the temperature. See AIRFLOW METER RESISTANCE table. Replace airflow meter if resistance is not within specification.
- Airflow meter operation should be checked. On Avalon, Camry Solara, Land Cruiser, Sequoia, Sienna, Tacoma, Tundra, and 4Runner 4.7L, go to next step. On Camry, Highlander and 4Runner 4.0L, go to step 6.
- Install electrical connector on airflow meter. Connect voltmeter leads to proper terminals on airflow meter with electrical connector installed. See Fig 5-Fig 8 .
- Turn ignition on. Apply air into designated area on airflow meter and note voltage reading. While air is being applied, voltage reading should fluctuate. Replace airflow meter if voltage does not fluctuate. Turn ignition off. Remove voltmeter.
- Apply battery voltage to +B terminal on airflow meter and battery ground to E2G terminal on airflow meter. Connect voltmeter leads to proper terminals on airflow meter. Apply air into designated area on airflow meter and note voltage reading. See Fig 2. While air is being applied, voltage reading should fluctuate. Replace airflow meter if voltage does not fluctuate. Disconnect battery and remove voltmeter.
AIRFLOW METER RESISTANCE
| Temperature | Ohms | |
|---|---|---|
| Avalon | ||
| -4°F (-20°C) | 13,600-18,400 | |
| 68°F (20°C) | 2210-2690 | |
| 140°F (60°C) | 490-670 | |
| Camry | ||
| -4°F (-20°C) | 13,600-18,400 | |
| 68°F (20°C) | 2210-2690 | |
| 140°F (60°C) | 493-667 | |
| Camry Solara | ||
| -4°F (-20°C) | 14,600-17,800 | |
| 68°F (20°C) | 2210-2690 | |
| 140°F (60°C) | 290-350 | |
| Highlander | ||
| -4°F (-20°C) | 13,600-18,400 | |
| 68°F (20°C) | 2210-2690 | |
| 140°F (60°C) | 493-667 | |
| Land Cruiser, Sequoia, Tundra 4.7L & 4Runner 4.7L | ||
| -4°F (-20°C) | 12,500-16,900 | |
| 68°F (20°C) | 2190-2670 | |
| 140°F (60°C) | 500-680 | |
| Sienna & 4Runner 4.0L | ||
| -4°F (-20°C) | 13,600-18,400 | |
| 68°F (20°C) | 2210-2690 | |
| 140°F (60°C) | 490-670 | |
| Tacoma & Tundra 3.4L | ||
| -4°F (-20°C) | 13,600-18,400 | |
| 68°F (20°C) | 2200-2700 | |
| 140°F (60°C) | 500-700 | |
Fig 2: Identifying Airflow Meter Terminals, Air Application Area & Voltmeter Connections (Camry, Highlander & 4Runner 4.0L)