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: Inspection
- INSPECT MASS AIR FLOW METER
- Perform a visual check for any foreign matter on the platinum hot wire (heater) of the mass air flow meter shown in the illustration.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK
There is no foreign material.
If the result is not as specified, replace the mass air flow meter.
- Measure the resistance between the terminals.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Specified Resistance
Tester Connection Condition Condition 1(THA) - 2(E2) -20°C (-4°F) 13.6 to 18.4 kΩ 20°C (68°F) 2.21 to 2.69 kΩ 60°C (140°F) 0.49 to 0.67 kΩ If the result is not as specified, replace the mass air flow meter.
- Perform a visual check for any foreign matter on the platinum hot wire (heater) of the mass air flow meter shown in the illustration.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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