Check CKPS
Key "ON". (Don’t disconnect sensors.)
Select "vehicle scopemeter" in the menu, and connect channel A of scantool with terminal 1 of CKPS harness connector.
Engine start. And check the signal waveforms.
Specification :
Is the measured signal waveform O.K ?
YES
Go to "Check ECM" as follows
NO
Substitute with a known - good CKPS and check for proper operation.
If the problem is corrected, replace CKPS and go to "Verification of Vehicle Repair" procedure.
Check ECM
IG "OFF".
Connect scantool and Engine "ON".
Select simulation function on scantool.
Simulate frequency(Hz) at terminal 1 of CKPS signal connector.
Does the signal value of CKPS change according to simulation frequency ?
YES
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
NO
Substitute with a known - good ECM and check for proper operation.
If the problem is corrected, replace ECM and go to "Verification of Vehicle Repair" procedure.
