Many malfunctions in the electrical system are caused by poor harness and terminals.

Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

Has a problem been found?

	▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure
	▶ Go to next step as below

IG Key OFF

Install the oscilloscope to CVVL Motor connector.

IG Key ON - Engine run

Check the operation status of CVVL motor PWM.

Is the measured voltage within specification ?

	▶ Go to next step as below.
	▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.