Air Flow Meter/Sensor

Air Flow Sensor Frequency [1]
At 750 RPM 25 - 40 Hz
At 2,000 RPM 70 - 130 Hz

[1] Measured across terminals 1 and 4.

Output Voltage @ 750 - 2,000 rpm--ECM terminal 70 2.2-3.2 Volts
Output Voltage @ idle--ECM terminal 19 0 - 1.0 Volts
Output Voltage @ 3,000--ECM terminal 19 6 - 9 Volts