Kia Stinger: Engine Control System / Variable Charge Motion Actuator (VCMA)

Kia Stinger CK 2018-2024 Service Manual / Engine Control / Fuel System / Engine Control System / Variable Charge Motion Actuator (VCMA)

Components and components location

ECM directly controls the actuator and the rotation of motor operates the VCM flap of intake manifold in link structure to create tumble in air. Mounted inside the actuator, the motor and position sensor sense the position of flap and send feedback to ECM to determine the current location of flap and detect abnormal operation due to adherence of foreign substance.

Description and operation

Variable charge motion actuator reinforces the tumble of the air that flows inside the cylinder, improves combustion performance, and enhances engine torque and fuel efficiency in low to mid speed range. ECM drives ON/OFF the motor to control the VCMA. VCMA is usually "Closed" and creates tumble for the air intake when vehicle is started. When vehicle accelerates and reaches approx. 2,600 rpm, actuator operates VCM flap (Open) and facilitates the flow of air intake.


Schematic diagrams
Circuit diagram

Harness Connector

Repair procedures

Switch "OFF" the ignition and disconnect the negative (-) battery terminal.


Remove the intake manifold.

(Refer to Engine Mechanical System - “Intake Manifold”)


Remove the variable charge motion actuator mounting bolts (A).


Remove VCMA rod clip (B) and connection link between flap (C) using screwdriver.


Install in the reverse order of removal.

VCMA mounting bolt :

9.8 - 11.8 N·m (1.0 - 1.2 kgf·m, 7.2 - 8.7 lb·ft)


Make sure that groove part of the connection link is pointing upward when mounting VCMA.


After replacing the VCMA (Variable Charge Motion Actuator) or intake manifold, be sure to delete the previous VCMA adative value by performing the 'resetting adaptive values' procedure using KDS.


VCMA learning procedure is performed automatically while driving but manual learning procedure is also available for immediate access to proper operation.


Push the accelerator pedal at 2,500 engine rpm for 2-3 seconds and then idle the engine.


Repeat the no. 1 procedure three times.


Switch "OFF" the ignition.


Switch "OFF" the ignition.


Connect the KDS to Data Link Connector (DLC).


Switch "ON" the ignition.


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


Select "Vehicle S/W Management".


Delete the previous VCMA adaptive value by selecting "Resetting Adaptive Values".


Press [Reset] when ready.


Reset completed.

CVVT Oil Control Valve (OCV) [Bank1/Exhaust]
Specifications Specification Item Specification Coil Resistance (Ω) 6.9 - 7.9 [20°C(68°F)] Description and operati ...

E-CVVT motor
Components and components location Components Appearance of E-CVVT is similar to that of hydraulic CVVT. Connector that drives DC motor and protection cover that protects the motor are ...

Other information:

Kia Stinger CK 2018-2024 Service Manual: Crash Pad

Components and components location Components 1. Cowl cross member bar 2. Main wiring 3. Main crash pad 4. Side air vent duct [RH] 5. Crash pad under cover [RH] 6. Crash pad lower panel [RH] 7. Crash pad center lower cover 8. Glove box housing ...

Kia Stinger CK 2018-2024 Owners Manual: Tire rotation

To equalize tread wear, it is recommended that the tires be rotated every 10,000 km (6,000 miles) or sooner if irregular wear develops. During rotation, check the tires for correct balance. When rotating tires, check for uneven wear and damage. Abnormal wear is usually caused by incorrect tire ...

Copyright © 2015-2024