Mass Air Flow (MAF) & Intake Air Temperature (IAT) Sensor Inspection
Mass Air Flow (MAF) and Intake Air Temperature (IAT) Sensor InspectionReference: Mass Air Flow (MAF) and Intake Air Temperature (IAT) Sensor Removal and Installation
CAUTION: Do not heat up MAF and IAT sensor more than 100 °C (212 °F). Otherwise, MAF and IAT sensor will be damaged.
^ Check sensor O-ring (1) for damage and deterioration. Replace as necessary.
^ Blow hot air to temperature sensing part (2) of MAF and IAT sensor (3) using hot air drier (4) and measure resistance between sensor terminals while heating air gradually.
If measured resistance does not show such characteristic as shown, 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): 0.493 - 0.667 kohms