Component Inspection

Engine Control

P0101 Mass or Volume Air Flow 'A' Circuit Range / Performance - Component Inspection

Component Inspection

Visual Inspection
1. Check for damage or contamination to the MAF.
2. Check for restriction in the air filter.
3. Has a problem been found?





Check MAFS
1. IG "OFF" and install a GDS.
2. ENG "ON" and monitor "MAFS" data on the service data.
3. Monitor signal waveform at signal terminal of MAFS with GDS.

Specification : Signal waveform will be displayed as follows. Frequency will be increased during acceleration. (Be aware that the signal of MAFS is not voltage display but frequency display.)








Fig.1) Normal data & waveform of MAFS at idle.
Fig.2) Normal data & waveform of MAFS at acceleration.
4. Are both service data and signal waveform dispayed correctly?