Monitor Description

WARNING: This page is about a different variant/trim than selected.

At high engine speeds, the VVTL-i actuator regulates the hydraulic (engine oil) pressure applied to the shims on the high lift (high speed) cam side. Switching from the standard (low and mid speeds) to high lift cam allows the lift of the intake and exhaust valves to be increased. The engine exhaust capacity is also enhanced. As a result, the engine power is boosted. When the engine speed is 6,500 rpm or more, the ECM increases the OCV control signal duty ratio, and opens the oil passage to the VVTL-i actuator. The actuator activates the shims and the intake and exhaust valves on the high lift cam side. The VVTL-i oil pressure switch is turned ON and OFF to control the hydraulic pressure to the VVTL-i system. The ECM uses a signal transmitted by the switch to determine whether the standard cam or the high lift cam is being used. If either of the following conditions occurs, the ECM determines that there is a malfunction in the OCV for VVTL-i, and illuminates the MIL and sets a DTC:

The hydraulic pressure applied to the VVTL-i system is high despite the ECM signaling for the standard cam.
The hydraulic pressure applied to the VVTL-i system is low despite the ECM signaling for the high lift cam.