Air Flow Meter/Sensor: Testing and Inspection

Mass Air Flow Sensor Test:

1. Pull the rubber insulator back from the air flow meter connector.
2. Turn the ignition switch ON.
3. Start and warm the engine to operating temperature and then let it idle.
4. Using a volt meter, check voltages between terminal 1 and ground under the following conditions.

IDLING:
Approximately: 1.0 - 1.4 VOLTS.
IGNITION "ON" ENGINE STOPPED:
Approximately: 0.2 VOLTS.

Mass Air Flow Sensor Components:

If the meter fails the above test, check the "hot film resistor" for dust or damage and replace the meter if necessary.