1993 Nissan 240SX L4-24L Mass Air Flow Sensor Specifications
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Mass Air Flow 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.