MASS AIR FLOW (MAF) SENSOR INSPECTION [F2]

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Note

•  Perform the following inspection only when directed.

MAF Sensor Inspection

1.  Visually inspect for the following on the MAF sensor.

•  Damage

•  Cracks

•  Terminal bends

•  Terminal rust

―  If any of the above are found, replace the MAF sensor.

―  If the MAF PID valve is out of specification, carry out the “Circuit Open/Short Inspection”.

2.  Disconnect the MAF sensor connector.

Open circuit

•  MAF signal circuit (MAF sensor connector terminal B and PCM connector terminal 2O)

•  Power circuit (MAF sensor connector terminal C and main relay terminal D through common connector)

•  GND circuit (MAF sensor connector terminal A and PCM connector terminal 2D through common connector)

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Short circuit

•  MAF signal circuit (MAF sensor connector terminal B and PCM connector terminal 2O to GND)

•  Power circuit (MAF sensor connector terminal C and main relay terminal D through common connector to GND)

3.  Repair or replace faulty areas.

4.  Reconnect the MAF sensor connector.