Other information:
Description
Variable Intake manifold Solenoid (VIS) valve is installed on the intake manifold.
The VIS valve controls the vacuum modulator which activates a valve in the intake
manifold. The ECM opens or closes this valve according to engine condition (Refer
to below table). ...
Description
Continuous Variable Valve Timing (CVVT) system advances or retards the valve
timing of the exhaust valve in accordance with the ECM control signal which
is calculated by the engine speed and load.
By controlling CVVT, the valve over-lap or under-lap occurs, whi ...