System Inspection

Engine Control

P2173 Throttle Actuator Control System- High Air Flow Detected. - System Inspection

System Inspection

Visual Inspection
1. Check the air hose between MAFS and throttle body is torn or installation.
2. Check deforamtion, crack or installation of throttle valve (body)
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 wave form dispayed correctly?