Mass Air Flow (MAF) & Intake Air Temperature (IAT) Sensor On-Vehicle Inspection

MAF and IAT Sensor On-vehicle Inspection

NOTE: Before performing this inspection, be sure to read the "Precautions for ECM Circuit Inspection" under Precautions for Engine.

Check that MAF sensor signal and IAT sensor signal are output properly Pinout Values and Diagnostic Parameters.
If faulty condition is found, check the following points:
- Wire harness and connections
- MAF and IAT sensor Mass Air Flow (MAF) & Intake Air Temperature (IAT) Sensor Inspection