Air Flow Meter/Sensor: Testing and Inspection

MASS AIR FLOW (MAF) METER

INSPECTION







1. INSPECT MAF METER RESISTANCE
Using an ohmmeter, measure the resistance between terminals THA and E3.




2. INSPECT MAF METER OPERATION
a. Connect the negative (-) terminal cable to the battery.
b. Turn the ignition switch ON.
c. Connect the MAF meter connector.
d. Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E3.
e. Blow air into the MAF meter, and check that the voltage fluctuates.
If operation is not as specified, replace the MAF meter.
f. Turn the ignition switch LOCK.
g. Disconnect the negative (-) terminal cable from the battery.
h. Disconnect the MAF meter connector.