{HEAD ~ The ECU} determines the level of {TAIL ~ the actual hydraulic pressure} given to the VVT 
{ HEAD ~ The ECU } determines the level of { TAIL ~ the actual hydraulic pressure } given to the VVT
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH