Air Flow Meter/Sensor: Testing and Inspection

Mass air flow sensor
1. Turn ignition switch "ON".
2. Start engine and warm it up to normal operating temperature.




3. Check voltage between ECM terminal (47) and ground.
4. If the voltage is out of specification, disconnect mass air flow sensor harness connector and connect it again. Repeat above check.
5. If NG, remove mass air flow sensor from air duct. Check hot film for damage or dust.