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.
Mass Air Flow Meter: Inspection
- INSPECT MASS AIR FLOW METER
- Check the output voltage.
- Apply battery voltage across terminals 1 (+B) and 2 (E2G).
- Using a voltmeter, connect the positive (+) tester probe to terminal 3 (VG), and negative (-) tester probe to terminal 2 (E2G).
- Blow air into the MAF meter, and check that the voltage fluctuates.
- Measure the resistance between terminals 4 (THA) and 5 (E2).
Standard resistance
RESISTANCE SPECIFICATIONCondition Specified Condition -20°C (-4°F) 12.5 to 16.9 kΩ 20°C (68°F) 2.19 to 2.67 kΩ 60°C (140°F) 0.50 to 0.68 kΩ If the result is not as specified, replace the MAF meter.
- Check the output voltage.
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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.
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