Component Inspection

Component Inspection

1. Check CMPS
(1) IG "OFF" and connect scantool.
(2) ENG "ON" and Measure signal waveform at terminal 3 of CMPS.
A. Reference signal waveform :




(3) Is the measured signal waveform normal?
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.
NO
- Substitute with a known - good CMPS and check for proper operation. If the problem is corrected, replace CMPS 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.