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.
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HOMESERVICE MANUALSTOYOTA2007HIGHLANDER 2WD V6-3.3L (3MZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTFUEL DELIVERY AND AIR INDUCTIONAIR FLOW METER/SENSORTESTING AND INSPECTION
2007 Toyota Highlander 2WD V6-3.3L (3MZ-FE)
Air Flow Meter/Sensor: Testing and Inspection
2007 Toyota Highlander 2WD V6-3.3L (3MZ-FE)SECTION Testing and Inspection
INSPECTION
INSPECT MASS AIR FLOW METER
a. Check the output voltage.
1. Apply battery voltage across terminals 1 (+B) and 2 (E2G)
2. Connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
3. Blow air into the Mass Air Flow (MAF) meter, and check that the voltage fluctuates.
b. Measure the resistance between terminals 4 (THA) and 5 (E2).
If the result is not as specified, replace the MAF meter.
INSPECT MASS AIR FLOW METER
a. Check the output voltage.
1. Apply battery voltage across terminals 1 (+B) and 2 (E2G)
2. Connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
3. Blow air into the Mass Air Flow (MAF) meter, and check that the voltage fluctuates.
b. Measure the resistance between terminals 4 (THA) and 5 (E2).
If the result is not as specified, replace the MAF meter.
RENDER: 1.0x
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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.