Inspection

MAF (Mass Air Flow) and IAT (Intake Air Temperature) Sensor Inspection

MAF (Mass Air Flow) and IAT (Intake Air Temperature) Sensor Removal and Installation

NOTE:

The MAF and IAT sensor will be damaged if exposed to a temperature higher than 100 °C (212 °F).

Do not heat the MAF and IAT sensor to a temperature higher than 100 °C (212 °F).

IAT sensor inspection

1) Remove MAF and IAT sensor. Removal and Installation
2) Check sensor O-ring (1) for damage and deterioration. Replace as necessary.
3) Measure resistance between sensor terminals "1" and "2" while blowing hot air to temperature sensing part (2) of MAF and IAT sensor (3) using hot air drier (4).

If faulty condition is found, replace MAF and IAT sensor.

Intake air temperature sensor resistance
-20 °C (-4 °F): 13.6 - 18.4 kohms
20 °C (68 °F): 2.21 - 2.69 kohms
60 °C (140 °F): 0.439 - 0.667 kohms













MAF sensor inspection

1) Remove MAF and IAT sensor. Removal and Installation
2) Connect battery (2) and voltmeter (3) to MAF and IAT sensor (1) as shown in figure.
3) Check that voltage varies depending on amount of blowing air as the following graph.

If faulty condition is found, replace MAF and IAT sensor.