Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1987 Toyota MR2 AutomaticFACTORY OEM SERVICE PROCEDURE
Airflow Meter
Turn ignition off. Disconnect wiring connector from airflow meter. Using an ohmmeter, measure resistance between each terminal. If resistance values do not meet specifications shown in table, replace airflow meter.
AIRFLOW METER RESISTANCE SPECIFICATIONS
| Terminals | Condition | Ohms |
|---|---|---|
| E1 - Fc | Flap Closed | Infinity |
| E2 - THA | -4°F (-20°C) | 10,000-20,000 |
| E2 - THA | 32°F (0°C) | 4000-7000 |
| E2 - THA | 68°F (20°C) | 2000-3000 |
| E2 - THA | 104°F (40°C) | 900-1300 |
| E2 - THA | 140°F (60°C) | 400-700 |
| E2 - Vb | N/A | 200-400 |
| E2 - Vc | N/A | 100-300 |
| E2 - Vs | Flap Open | 200-1200 |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.