MASS AIR FLOW (MAF) SENSOR INSPECTION [MZI-3.7]

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Visual Inspection

1.  Verify the following items of the MAF sensor.

•  Dirt, damage, cracks

•  Rusted sensor terminal

•  Bent sensor terminal

―  If there is any malfunction, replace the MAF sensor. (See MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL/INSTALLATION [MZI-3.7].)

Sensor Output Value Inspection

1.  Remove the MAF sensor with the connector still connected.

2.  Select MAF PID (voltage) on the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZI-3.7].)

3.  Verify that the MAF sensor output voltage changes when wind is introduced gradually to the sensor part of the MAF sensor.

•  If it cannot be verified, replace the MAF sensor. (See MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL/INSTALLATION [MZI-3.7].)