Air Flow Meter/Sensor: Testing and Inspection

INSPECTION




INTAKE AIR FLOW METER SUB-ASSY
a. Output voltage inspection.
1. Apply battery voltage across terminals 1 (+B) and 2 (E2G).
2. Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
3. Blow air into the MAF meter, and check that the voltage fluctuates.

b. Resistance inspection.
1. Using an ohmmeter, measure the resistance between terminals 4 (THA) and 5 (E2).
Resistance:
-20°C (-4°F) 13.6-18.4 kOhms
20°C (68°F) 2.21-2.69 kOhms
60°C (140°F) 0.493 -0.667 kOhms