General Information

Engine Control

P200A Intake Manifold Runner Performance - General Information

Component Location





General Description

Variable Charge Motion Actuator (VCMA) is used for an adjustment of automotive flap and it is operated with two position, open and close. It makes swirl among intake air to reduce emission under cold start condition. This is worm gear driver type which doesn't guarantee restoring to limp home position in the case of loss of current supply. (This doesn't have mechanical return force due to no return spring.)

DTC Description

If the VCM position sensor presents less than 50% when the commended position is open, or greater than 50% when the commended position is close, or If initial position learning value of VCMA is out of specified range by carbon or foreign object in intake manifold, ECM determines that a fault exists and a DTC is stored.

DTC Detecting Condition





Diagnostic Circuit Diagram










Signal Waveform & Data








Fig.1) Normal waveform of VCM actuator (OPEN)
Fig.2) Normal waveform of VCM actuator (Closed)