Genuine Mitsubishi Diamante Mass Air Flow Sensor

Mitsubishi Diamante Mass Air Flow Sensor Parts Questions & Experts Answers

• Air Mass Sensor
  MD357338
  Q: What is the function of the Mass Air Flow Sensor and how does it operate in an engine on Mitsubishi Diamante?

  A:

  The Mass Air Flow (MAF) sensor determines the mass of air entering the engine, with the output used to calculate injector pulse width. The platinum wire feature of hot-wire sensor is filament. The filament is heated by 417F, which is the temperature above ambient temperature. Then the filament is subjected to the intake airflow. A "cold-wire" in the payload sensor is used to measure ambient air temperature as well as the current battery and ground voltages supplied to the PCM by a reference signal. The sensor emits a signal which is proportional to the current that maintains the temperature of the hot-wire; the increase in the flow of air cools off the wire thus dropping the resistance and requiring extra current which corresponds to a greater voltage. You can perform the testing by measuring the voltage levels at different terminals of the MAF sensor connector using a multimeter. With the ignition key ON (engine OFF or ON), ensure the proper voltages are present. To remove the sensor, disconnect the negative battery cable, release the retaining clips, and detach the hoses and connectors. Then, remove the sensor from the air cleaner upper housing while being careful not to damage your sensor. To install, do the reverse of uninstalling.