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.
Airflow Meter: Subaru
Remove rubber cover from electrical connector on airflow meter. Leave connector connected. Connect volt/ohmmeter between terminals and record readings. See SUBARU AIRFLOW METER RESISTANCE table. If readings are not to specifications, check electrical wiring. If wiring is okay, replace airflow sensor.
| Ign. Sw. | Wire Colors | Readings | |
|---|---|---|---|
| SPFI | |||
| Off | Black-Ground | 0-10 Ohms | |
| On | Red-Ground | 10 Volts Min. | |
| On | White-Black | .1-.5 Volts | |
| MPFI | |||
| Off | Black-Ground | 0-10 Ohms | |
| Off | Brown-Ground | 0-10 | |
| On | Red-Ground | 10 Volts Min. | |
| On | White-Brown | 1-2 Volts | |
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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.