VTC Oil Control Solenoid Valve Test

1.Remove the VTC oil control solenoid valve (A).

NOTE: Install the part in the reverse order of removal with a new O-ring (B), then check these items:

  • Clean and dry the VTC oil control solenoid valve mating surface.
  • Coat O-ring with engine oil.
  • Do not install the VTC oil control solenoid valve while wearing fibrous gloves.
  • Be careful not to contaminate the cylinder head opening.

 

2.Check the VTC oil control solenoid valve filter for clogging. If it is clogged, replace the VTC oil control solenoid valve.

3.Note the amount of valve opening by observing the position of the piston shoulder (A) through the valve retard drain port. The valve should be closed. If you see the shoulder of the piston, the valve is open and must be replaced.

CLOSED 

OPEN 

4.Connect the battery positive terminal to the VTC oil control solenoid valve 2P connector terminal No. 2.

 

5.Connect the battery negative terminal to the VTC oil control solenoid valve 2P connector terminal No. 1. Appearance of inner valve (A) in the port should be at least 1.2 mm (0.05 in.). If the inner valve does not open, replace it.