Multiple choice general knowledge science & technology

Expand MAFRTN

  1. Machine Assisted air injuction

  2. Mass Air inject system

  3. Machine Airflow

  4. Mass Airflow Sensor Ground
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

MAFRTN stands for Mass Air Flow Sensor Ground in automotive electrical systems. It's the ground connection for the mass airflow sensor which measures air entering the engine.

AI explanation

MAFRTN is a genuine Ford Electronic Engine Control (EEC-IV) wiring/acronym designation, documented in Ford technical acronym lists, standing for 'Mass Air Flow signal ReTurN' (i.e., the return/reference line of the mass air flow sensor circuit back to the ECU). A signal 'return' line functions as the low-side reference (effectively a sensor-side ground) that completes the MAF sensor's signal circuit, which is what the DB's marked option, 'Mass Airflow Sensor Ground,' describes in substance, even though the exact Ford documentation phrasing is 'signal return' rather than 'sensor ground.' The other three options ('Machine Assisted air injuction,' 'Mass Air inject system,' 'Machine Airflow') do not correspond to any documented Ford or automotive terminology and are not plausible expansions of the letters M-A-F-R-T-N.

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