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 parts automatically detected and memorized by PCM. After testing PCM on the vehicle, use this function to reuse the PCM on the others.