Technician A says that a MAF may contain either an electrically heated hot wire or film. Technician B says that the PCM changes the current supplied to the MAF sensor in order to maintain the hot wire or hot film temperature. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Question

Quizplus · Accepted Answer

Both technicians are correct. Some MAF sensors contain an electrically heated hot wire while others contain a hot film. The PCM does change the current supplied to the MAF sensor in order to maintain the hot wire or hot film at a constant temperature.

Technician a Says That a MAF May Contain Either an Electrically