2010 Lexus GS 450h Owners Manual - Page 216

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2-4. Using other driving systems

GS_HV_U (OM30C81U)

June 30, 2011 9:20 am

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Automatic reactivation of TRAC and Enhanced VSC

Turning the “POWER” switch OFF after turning off the TRAC and Enhanced VSC

systems will automatically re-enable them.

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Automatic TRAC reactivation

If only the TRAC system is turned off, the TRAC system will turn on when the vehi-

cle speed increases.

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Automatic TRAC and Enhanced VSC reactivation

If the TRAC and Enhanced VSC systems are turned off, the systems will not turn on

even when the vehicle speed increases.

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Sounds and vibrations caused by the ABS, brake assist, Enhanced VSC, TRAC,

hill-start assist control and VGRS systems

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A sound may be heard from the engine compartment when the hybrid system is

started or just after the vehicle begins to move. This sound does not indicate that

a malfunction has occurred in any of these systems.

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Any of the following conditions may occur when the above systems are operat-

ing. None of these indicates that a malfunction has occurred.

°

Vibrations may be felt through the vehicle body and steering.

°

A motor sound may be heard after the vehicle comes to a stop.

°

The brake pedal may pulsate slightly after the ABS is activated.

°

The brake pedal may move down slightly after the ABS is activated.

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Hill-start assist control operating conditions

This system comes into operation under the following conditions after the brake

pedal has been depressed and the vehicle has come to a stop:

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The shift lever is in the “D” or “S”.

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The system has detected that the vehicle is moving backwards.

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EPS operation sound

When the steering wheel operates, a motor sound (whirring sound) may be heard.

This does not indicate a malfunction.