Air Flow Meter/Sensor: Testing and Inspection

(From November, 2004)

INSPECT MASS AIR FLOW METER




a. Check the output voltage.
1. Apply battery voltage across terminals 3 (+B) and 4 (E2G).
2. Connect the positive (+) tester prove to terminal 5 (VG), and the negative (-) tester prove to terminal 4 (E2G).
3. Blow air into the MAF meter, and check if the voltage fluctuates.

b. Check the resistance.
1. Using an ohmmeter, measure the resistance between terminals 2 (THA) and 1 (E2).

Resistance:
12.5 to 16.9 kOhms at -20 degrees C (-4 degrees F)
2.19 to 2.67 kOhms at 20 degrees C (68 degrees F)
0.50 to 0.68 kOhms at 60 degrees C (140 degrees F)