2.
ENG "ON" and Measure signal waveform at signal terminal of CMPS.
a.
Reference signal waveform :
Fig) Signal waveforms of CMPS #1 and #2 at idle
note
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■ Check CMPS
IG "OFF" and connect scantool.
ENG "ON" and Measure signal waveform at signal terminal of CMPS.
Reference signal waveform :
Fig) Signal waveforms of CMPS #1 and #2 at idle
Is the measured siganl 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.
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
