Hyundai Elantra: Mass Air Flow Sensor (MAFS). Description and Operation - Engine Control System - Engine Control/Fuel System - Hyundai Elantra HD 2006–2010 Service ManualHyundai Elantra: Mass Air Flow Sensor (MAFS). Description and Operation

Function And Operation Principle

Mass Air Flow Sensor (MAFS) is a hot-film type sensor and is located in between the air cleaner and the throttle body. It consists of a tube, a sensor assembly and honeycomb cell and detects intake air quantity flowing into the intake manifold. Air flows from the air cleaner assembly through the honeycomb cell and over the hot film element.
At this time, heat transfer is generated by convection and this sensor loses its energy. This sensor detects the mass air flow by using the energy loss and transfers the information to the ECM by vaoltage. The ECM calculates fuel quantity and ignition timing.

    Engine Control Module (ECM). Repair procedures
    ECM Problem Inspection Procedure 1. TEST ECM GROUND CIRCUIT: Measure resistance between ECM and chassis ground using the backside of ECM harness connector as ECM side chec ...

    Mass Air Flow Sensor (MAFS). Specifications
    Specification Air Flow (kg/h) Output Voltage (V) 4.9 0.70 7.3 0.90 12.2 1.18 ...