Valve Timing Control System

VTC Input/Output Line:

VTC Control:

PURPOSE
The Valve Timing Control (VTC) system is used to improve engine performance by dynamically changing intake cam timing.

VTC Operation Table:

VTC Solenoid Valve Position:

OPERATION
Intake valve opening and closing time is controlled, according to the engine operating conditions, by the ECCS Control Module.
Engine coolant temperature signals, engine speed, amount of intake air, throttle position, vehicle speed and gear position are used to determine intake valve timing.
the intake camshaft pulley position is regulated by oil pressure, which is controlled by the valve timing control solenoid valve.