Air Flow Meter/Sensor: Testing and Inspection

Fig. 21 Air flow meter terminal identification.:

Fig. 23 Air flow meter test specifications.:

Fig. 24 Air flow meter test specifications:

1. Disconnect electrical connector to air flow meter.
2. Measure resistance between air flow meter terminals, Fig. 21, using a suitable ohmmeter.
3. Resistance values should be as shown in Fig. 24.
4. Remove air flow meter.
5. Measure resistance between air flow meter terminals while moving sensor plate through complete range of travel.
6. Resistance values should be as shown in Fig. 24.
7. If resistance values are not as shown, or if sensor plate binds or sticks in any position, air flow meter is defective. Air flow meter and air temperature sensor are serviced as an assembly.