Component Inspection

Component Inspection

1. Visual Inspection
(1) Check that MAFS is damaged, contaminated or deformed.
(2) Check the air cleaner is clogged.
(3) Has a problem been found ?
YES
- Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
- Go to "Check MAFS" as follows
2. Check MAFS
(1) IG "OFF" and install scantool
(2) ENG "ON" and monitor "MAFS" data.
(3) Monitor signal waveform at terminal 1 of MAFS with scantool.
Specification : Signal waveform will be displayed as follows. (Be aware that the signal of MAFS is not voltage display but frequency display).




(4) Are both service data and signalwave form dispayed correctly ?
YES
- Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" procedure.

CAUTION:
There is a memory reset function on scantool that can erase optional components automatically detected and memorized by PCM.Before or after testing PCM on the vehicle, use this function to reuse the PCM.

NO
- 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.