Lexus GS 350 Owner's Manual page 274

272
4-5. Using the driving support systems
When the message is displayed on the multi-information display showing that
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TRAC has been disabled even if the VSC OFF switch has not been pressed
TRAC cannot be operated. Contact your Lexus dealer.
VGRS is disabled when
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VGRS may stop operating in the following situations.
In this event, the steering wheel may move from its straight forward position, but it
will return when the system restarts.
The steering wheel is operated for an extended period of time while the vehicle is
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stopped or is moving very slowly.
When force is continuously applied for a long time with the steering wheel turned
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as far as it will go.
The center position of the steering wheel may change when VGRS is disabled. How-
ever, the position will return to normal after VGRS is reactivated.
When the battery is disconnected
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The steering wheel may move from its straight forward position, but this will be cor-
rected automatically when driving.
Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC and VGRS sys-
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tems
A sound may be heard from the engine compartment when the engine is started or
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just after the vehicle begins to move. This sound does not indicate that a malfunc-
tion has occurred in any of these systems.
Any of the following conditions may occur when the above systems are operating.
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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.
EPS, VGRS and DRS operation sound
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When the steering wheel is operated, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.
Reactivation of the TRAC/VSC systems
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Even after the TRAC/VSC systems have been turned off, turning the engine off and
then on again will automatically reactivate the TRAC/VSC systems.