Circuit Description

VVT system controls the intake valve timing to proper timing in response to driving condition. ECM controls OCV (Oil Control Valve) to make the intake valve timing properly, and, oil pressure controlled with OCV is supplied to the VVT controller, and then, VVT controller changes relative position between the camshaft and the crankshaft.


DTC Detecting Condition

Trouble Area


Condition (a) or (b) continues for after the engine is warmed up and engine speed at 400 - 4,000 rpm :

(a) Valve timing does not change from of current valve timing

(b) Current valve timing is fixed.

• Oil control valve

• VVT controller assembly


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