Theory Of Operation
WARNING: This page is about a different variant/trim than selected.
The Mass Air Flow (MAF) Sensor is a multi-function smart device. The Powertrain Control Module (PCM) monitors the MAF Sensor signal directly through the hard-wired signal circuit like a typical MAF Sensor. The MAF Sensor also has an internal Intake Air Temperature Sensor, Humidity Sensor, and Inlet Air Pressure Sensor. The MAF Sensor communicates this information to the PCM over the LIN Bus circuit. The MAF Sensor also performs diagnostics on the internal air temperature sensor and reports faults to the PCM over the LIN Bus circuit.