Variable Charge Motor Actuator (VCMA)

Components and Component Location

Components

The ECM directly controls the actuator, and the engine rotation drives the VCM intake manifold flap in a linkage structure to create a swirl in the air. The actuator contains a motor and a position sensor that detect the flap position and send feedback to the ECM to determine the current flap position and detect abnormal operation caused by foreign matter sticking.

Description and Operation

Description

The Variable Charge Motion actuator enhances the air movement flowing inside the cylinder, improves combustion characteristics, and increases engine torque and fuel economy, particularly in the low and mid speed range. The ECM turns the actuator on and off to control the VCMA. The VCMA is normally closed and creates a swirl in the intake air when the vehicle is started. When the vehicle accelerates and reaches approx. 2600 rpm, the actuator opens the VCM flap and facilitates intake airflow.

Operation

Circuit Diagrams

Wiring Diagram

Harness Connector

Repair Procedures

Removal

1. 1

   Turn the ignition switch OFF and disconnect the negative (-) battery terminal.

2. 2

   Remove the intake manifold.

   (Refer to Engine Mechanical System - "Intake Manifold")

3. 3

   Remove the Variable Charge Motion actuator mounting bolts (A).

4. 4

   Using a screwdriver, remove the VCMA rod clip (B) and the connecting link between the valve (C).

   

Installation

1. Install in the reverse order of removal.

   VCMA Mounting Bolt: 9.8–11.8 N·m

Adjustment

1. 1

   Turn the ignition off.

2. 2

   Connect the KDS to the Data Link Connector (DLC).

3. 3

   Turn the ignition on.

4. 4

   Select "Vehicle, Model Year, Engine, System".

5. 5

   Select "Vehicle Software Management".

6. 6

   Delete the previous VCMA adaptive value by selecting "Reset Adaptive Value".

   

7. 7

   Press [Reset] when ready.

8. 8

   Reset is complete.