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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 and hill-start assist control cannot be operated. Contact your Lexus dealer.
Sounds and vibrations caused by the ABS, VSC, TRAC and brake assist
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A sound may be heard from the engine compartment when the engine
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(RX350) or hybrid system (RX450h) 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.
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.
EPS 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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Turning off the engine (RX350) or hybrid system (RX450h) after turning off the
TRAC/VSC systems will automatically reactivate them.
Reactivation of the TRAC system linked to vehicle speed
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When only the TRAC system is turned off, the TRAC system will turn on when vehi-
cle speed increases. However, when both TRAC and VSC systems are turned off,
the systems will not turn on even when vehicle speed increases.
Reduced effectiveness of the EPS system
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The effectiveness of the EPS system is reduced to prevent the system from over-
heating when there is frequent steering input over an extended period of time. The
steering wheel may feel heavy as a result. Should this occur, refrain from excessive
steering input or stop the vehicle and turn the engine (RX350) or hybrid system
(RX450h) off. The EPS system should return to normal within 10 minutes.
2-4. Using other driving systems
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