Inspect the CVVT for smooth rotation.
Clamp the camshaft using a vise. Be careful not to damage the cam lobes and journals in the vise.
Check that the CVVT is locked by turning it clockwise or counterclockwise. It must not rotate.
Seal one of the two advance holes in the camshaft journal with tape.
Apply approx. 150 kPa (1.5 kgf/㎠, 21 psi ) of compressed air into the unsealed advance hole to release the lock.
Cover the oil paths with a piece of cloth when applying compressed air to prevent oil from spraying.
With compressed air applied, rotate the CVVT into the advance direction (counterclockwise) within its phasing range and check that the CVVT turns smoothly.
CVVT phasing range
25˚±1˚ (from the most retarded position to the most advanced position)
Rotate the CVVT into the most retarded position (clockwise) and then check that the CVVT is locked.
