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 MANUALSTOYOTA2006SEQUOIA 4WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSSENSORS AND SWITCHES - COMPUTERS AND CONTROL SYSTEMSAIR FLOW METER/SENSORTESTING AND INSPECTION
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)
Air Flow Meter/Sensor: Testing and Inspection
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)SECTION Testing and Inspection
INSPECTION
1. INSPECT OUTPUT VOLTAGE
a. Apply battery voltage across terminals 1 (+B) and 2 (E2G).
b. Connect the positive (+) tester probe to terminal 3 (VG), and the negative (-) tester probe to terminal 2 (E2G).
c. Blow air into the MAF meter, and check if the voltage fluctuates. 2. INSPECT
2. INSPECT RESISTANCE
a. Using an ohmmeter, measure the resistance between terminals 4 (THA) and 5 (E2).
Resistance:
12.5 to 16.9 kOhms at -20 degree C (-4 degree F)
2.19 to 2.67 kOhms at 20 degree C (68 degree F)
0.50 to 0.68 kOhms at 60 degree C (140 degree F)
3. INSPECT MASS AIR FLOW METER
a. If using a intelligent tester:
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position.
3. Blow air into the MAF meter, and check that the air flow value of the CURRENT DATA changes. If operation is not as specified, check the MAF meter as well as the wiring and the ECM.
b. If not using a intelligent tester:
1. Turn the ignition switch to the ON position.
2. Connect the positive tester probe of the voltmeter to terminal VG of the ECM and the negative tester probe of the voltmeter to terminal E2G of the ECM.
3. Blow air into the air flow meter, and check if the voltage fluctuates.
If operation is not as specified, check the MAF meter, the wiring and the ECM.
1. INSPECT OUTPUT VOLTAGE
a. Apply battery voltage across terminals 1 (+B) and 2 (E2G).
b. Connect the positive (+) tester probe to terminal 3 (VG), and the negative (-) tester probe to terminal 2 (E2G).
c. Blow air into the MAF meter, and check if the voltage fluctuates. 2. INSPECT
2. INSPECT RESISTANCE
a. Using an ohmmeter, measure the resistance between terminals 4 (THA) and 5 (E2).
Resistance:
12.5 to 16.9 kOhms at -20 degree C (-4 degree F)
2.19 to 2.67 kOhms at 20 degree C (68 degree F)
0.50 to 0.68 kOhms at 60 degree C (140 degree F)
3. INSPECT MASS AIR FLOW METER
a. If using a intelligent tester:
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position.
3. Blow air into the MAF meter, and check that the air flow value of the CURRENT DATA changes. If operation is not as specified, check the MAF meter as well as the wiring and the ECM.
b. If not using a intelligent tester:
1. Turn the ignition switch to the ON position.
2. Connect the positive tester probe of the voltmeter to terminal VG of the ECM and the negative tester probe of the voltmeter to terminal E2G of the ECM.
3. Blow air into the air flow meter, and check if the voltage fluctuates.
If operation is not as specified, check the MAF meter, the wiring and the ECM.
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.