Lalito>
The Solenoids are the switches that trigger the cams - There is one for each cam on your engine so that they can trigger the intake and the exhaust cam independently from each other! On the new 2002 VE there are only one Solenoid so that both cam's switches at the same time!
The solenoids get their activation signal from the ECU but many VE owners build in a MSD system so that they can move the solenoid activation time to gain HP and tq between 5000-6500
You can read a lot about this in other threads!
All the data, writing etc he has about the VE is that in english!?!?