T1N Sprinter MAF testing скачать в хорошем качестве

T1N Sprinter MAF testing

Here I compare the measurements from good Bosch sensor to noname China on my other van and to band new duralast china DL-6153 from Autozone which is garbage as well. To measure you need either oscilloscope or the multimeter that can measure frequency and duty cycle. Pin 4 is MAF signal, it is a 0-5V square wave with the frequency proportional to the air flow. Pin 3 is the intake air temperature signal (internal sensor in the MAF) with the 19-20 Hz frequency, duty cycle of this signal is inversely proportional to the air temperature flowing through the MAF (pretty much the surrounding air temperature).