Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Variable Compression Ratio Control Module
FUNCTIONS WITHIN THE SYSTEM
The compression rate of engine is changed according to the signal from VCR control module.
INDIVIDUAL FUNCTION WITHIN THE SYSTEM
The VCR actuator has a motor and an angle sensor as built-in parts and also has a link connected to the a shaft in the engine.
INDIVIDUAL OPERATION
The compression rate of engine is changed according to changing angle of VCR control shaft which is rotated by VCR motor.
Component Location
VCR actuator is installed to front lower side of engine.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.