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Home >> Lexus >> 2009 >> SC 430 >> Repair and Diagnosis >> Electrical >> Body Electrical >> OEM System Circuits >> ABS, TRAC, VSC and PPS >> System Outline >> VSC Operation
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VSC Operation

Unexpected road conditions, vehicle speed, emergency situation, and any other external factors may cause large under- or over-steering of the vehicle. If this occurs, the VSC system automatically controls the engine power and wheel brakes to reduce the under- or over-steering.

To reduce large over-steering :

If the VSC system determines that the over-steering is large, it activates the brakes for the outer turning wheels depending on the degree of the over-steering to produce the moment toward the outside of the vehicle and reduce the over-steering. To reduce large under-steering :

If the VSC system determines that the under-steering is large, it controls the engine power and activates the rear wheel brakes to reduce the under-steering.

VSC OFF SW

The VSC OFF SW is used to stop the VSC function. After the engine is started, the VSC system is stopped (turned off) and the VSC OFF indicator light lights up. When the VSC OFF SW is pressed again, the VSC system enters the stand-by mode. If the engine is stopped and restarted, the VSC system enters the stand-by mode regardless of the VSC OFF SW.