Ignition "OFF" & Engine "OFF".

Remove CKPS.

Visually check that Tone wheel is O.K through the installation hole for CKPS.

Is the Tone wheel installed on the crankshaft O.K ?

YES

▶ Go to "Check CKPS" as below.

NO

▶ Check Tone wheel for contamination, deterioration or damage.

Replace Tone wheel on the crankshaft as necessary and go to "Verification of Vehicle Repair" procedure.

Ignition "OFF".

Remove CKPS and then connect CKPS connector to CKPS.

Ignition "ON" & Engine "OFF".

Move a metal on the detecting edge of CKPS with monitoring signal waveform.

Is the signal waveform displayed ?

YES

▶ Substitute with a known-good ECM and check for proper operation. If the problem is corrected, replace ECM and then 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 then go to "Verification of Vehicle Repair" procedure.