Hyundai Elantra: Engine Control System / Variable Charge Motion Actuator (VCMA) Description and Operation
The Variable Charge Motion Actuator (VCMA) is installed on the inlet of the intake manifold.
It consists of a DC motor which actuates the VCM valve and a position sensor which detects the position of the VCM valve.
The VCM system tumbles air flow entering into combustion
chamber of each cylinder by closing the VCM valve in the cold start
conditions.
This tumble effect reduces cold start emissions by improving atomization
Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the CCV connector.
3.
Measure resistance between the CCV terminal 1 and 2.
4.
Check that the resistance is within the specific ...
Components
1. Coupling2. Shaft3. Stabilizer O-ring4. Stabilizer5. O-ring6. Insert nut7. Stabilizer Cover8. Valve9. Hole cover
...
Other information:
Hyundai Elantra AD (2016-2020) Owners Manual: Driving Your Vehicle
WARNING
Carbon monoxide (CO) gas is toxic. Breathing CO can cause unconsciousness
and death.
Engine exhaust contains carbon monoxide which cannot be seen or smelled.
Do not inhale engine exhaust.
If at any time you smell engine exhaust inside the vehicle, open the windows
immediately. Exposu ...
Hyundai Elantra AD (2016-2020) Service Manual: Specifications
Specification
Ignition System
Ignition Coil
ItemSpecification Primary Coil Resistance (?)0.61 ± 15% [20°C (68°F)]Secondary Coil Resistance (k?)7.5 ± 15% [20°C (68°F)]
Spark Plug
ItemSpecificationTypeELR9IQP9+Gap0.8 ~ 0.9 mm (0.0314 ~ 0.0354 in.)
Charging System
Alter ...