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Sounds and vibrations caused by the ABS/Multi Terrain ABS, brake assist, VSC, Trailer
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Sway Control, TRAC/Active TRAC and hill-start assist control systems
A sound may be heard from the engine compartment when the brake pedal is
●
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 also after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the ABS/Multi Terrain ABS is activated.
• The brake pedal may move down slightly after the ABS/Multi Terrain ABS is acti-
vated.
Automatic reactivation of TRAC/Active TRAC, Trailer Sway Control and VSC systems
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After turning the TRAC/Active TRAC, Trailer Sway Control 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/Active TRAC system is turned off, the TRAC/Active TRAC will turn
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on when vehicle speed increases
If both the TRAC/Active TRAC and VSC systems are turned off, automatic re-enabling
will not occur when vehicle speed increases.
When the brake system operates continuously
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The brake actuator may overheat. In this case, the TRAC/Active TRAC and hill-start
assist control systems will stop operating, a buzzer will sound and the "TRAC OFF" indi-
cator will come on. Refrain from using the system until the message goes off. (There is no
problem with continuing normal driving.)
If the slip indicator comes on...
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It may indicate a malfunction in the TRAC/Active TRAC, VSC/Trailer Sway Control or
hill-start assist control system. Consult your Lexus dealer.
KDSS
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Some difference of vehicle height between left and right side can appear. This does not
indicate a malfunction in the KDSS system. For more information, contact your Lexus
dealer.
4-5. Using the driving support systems
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