Inspection

1UR-FE ENGINE CONTROL: MASS AIR FLOW METER: INSPECTION

1. INSPECT MASS AIR FLOW METER ASSEMBLY

(a) Check the output voltage.

(1) Apply battery voltage across terminals 1 (+B) and 2 (E2G).





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NOTICE:
While using the battery during inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur.

(2) Using a voltmeter, connect the positive (+) tester probe to terminal 3 (VG) and the negative (-) tester probe to terminal 2 (E2G).

(3) Blow air into the mass air flow meter and check that the voltage fluctuates.

If the result is not as specified, replace the mass air flow meter assembly.

(b) Perform a visual check for any foreign matter on the platinum hot wire (heater) of the mass air flow meter shown in the illustration.





OK:

There is no foreign matter.

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If the result is not as specified, replace the mass air flow meter assembly.

(c) Check the intake air temperature sensor.





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(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the result is not as specified, replace the mass air flow meter assembly.