Vgrs Is Disabled When; Sounds And Vibrations Caused By The Abs, Brake Assist, Vsc, Trac, Hill-Start Assist Control And Vgrs Systems; Eps And Vgrs Operation Sound; Automatic Reactivation Of Trac And Vsc Systems - Lexus 2016 IS 200t Service Manual

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4-5. Using the driving support systems

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.
When 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 the steering wheel has been held fully to the left or right
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The center position of the steering wheel may change when VGRS is disabled. However,
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 corrected
automatically when driving.
Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC, hill-start assist
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control and VGRS systems
A sound may be heard from the engine compartment when the brake pedal is
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depressed repeatedly, when the engine is started or just after the vehicle begins to
move. This sound does not indicate that a malfunction has occurred in any of these sys-
tems.
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 and VGRS operation sound

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When the steering wheel is operated, a motor sound may be heard. This does not indi-
cate a malfunction.

Automatic reactivation of TRAC and VSC systems

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After turning the TRAC and VSC systems off, the systems will be automatically re-
enabled in the following situations:
When the engine switch is turned off
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If only the TRAC system is turned off, the TRAC will turn on when vehicle speed
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increases
If both the TRAC and VSC systems are turned off, automatic re-enabling will not occur
when vehicle speed increases.
IS350/300/200t_U (OM53D18U)