MX-5 Miata L4-1.8L DOHC (1996)
Air Flow Meter/Sensor: Testing and Inspection
Using SSTs (NGS)
INSPECTION
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Check the mass air flow sensor for damage and cracks.
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Connect the SSTs (Engine Signal Monitor) to the ECM.
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Measure the voltage at ECM terminal 3B.
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Verify that the voltage is within the specification.
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If not as specified, inspect the harness and connector between the mass air flow sensor and the ECM terminal.
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If there is correct terminal voltage and harness continuity, replace the mass air flow sensor.
USING THE NGS
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Check the mass air flow sensor for damage and cracks.
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Connect the SSTs (NGS) to the data link connector-2.
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Select the PID/DATA MONITOR AND RECORD function of the NGS.
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Select "MAF V" on the NGS display. The NGS measures and shows the voltage.
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If not as specified, inspect the harness and connector between the mass air flow sensor and the ECM terminal.
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If there is correct terminal voltage and harness continuity, replace the mass air flow sensor.
NOTE: The scan tool shows the mass air flow rate and load value.
INTAKE AIR TEMPERATURE SENSOR
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Disconnect the mass air flow sensor connector.