Check the air hose between MAFS and throttle body is torn or installation.
Check deforamtion, crack or installation of throttle valve(body)
Has a problem been found ?
 | ▶ Substitute with a known-good Air hose or throttle body and check for proper operation. If the problem is corrected,replace air hose or throttle body and then go to "Verification of Vehicle Repair" proc |
 | ▶ Go to "Check MAFS" as follows.. |
IG "OFF" and install a scantool
ENG "ON" and monitor "MAFS" data on the service data.
Monitor signal waveform at signal terminal of MAFS with scantool.
Specification : Signal waveform will be displayed as follows. Frenquency will be increased during acceleration. (Be aware that the signal of MAFS is not voltage display but frequency display.)
Fig.1) Normal waveform of MAFS at idle. (640rpm & 13.0 kg/h)
Fig.2) Normal waveform of MAFS at acceleration. (2520rpm & 43.7 kg/h)
Are both service data and signalwave form dispayed correctly ?
| ▶ Go to "Verification of Vehicle Repair" procedure. |
| ▶ Substitute with a known - good MAFS and check for proper operation. If the problem is corrected, replace MAFS and go to "Verification of Vehicle Repair" procedure. |
