Turning Off Both Trac And Vsc Systems; Operating Conditions Of Hill-Start Assist Control; Automatic System Cancelation Of Hill-Start Assist Control; Sounds And Vibrations Caused By The Abs, Brake Assist, Trac, Vsc And Hill-Start Assist Control Systems - Lexus RX 450H Owner's Manual

Turning off both TRAC and VSC systems

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To turn the TRAC and VSC systems off, press and hold
while the vehicle is stopped.
The VSC OFF indicator light will come on and the "Traction Control Turned Off" will be
shown on the multi-information display.
Press again to turn the systems back on.
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: On vehicles with PCS (Pre-Collision System), pre-collision brake assist and pre-
collision braking will also be disabled. (→P. 293)
When the message is displayed on the multi-information display showing that TRAC
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has been disabled even if the VSC OFF switch has not been pressed
TRAC cannot be operated. Contact your Lexus dealer.

Operating conditions of hill-start assist control

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When the following four conditions are met, the hill-start assist control will operate:
The shift lever is in a position other than P or N (when starting off forward/backward on
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an upward incline).
The vehicle is stopped
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The accelerator pedal is not depressed
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The parking brake is not engaged
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Automatic system cancelation of hill-start assist control

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The hill-start assist control will turn off in any of the following situations:
The shift lever is shifted to P or N
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The accelerator pedal is depressed
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The parking brake is engaged
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Approximately 2 seconds elapse after the brake pedal is released
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Sounds and vibrations caused by the ABS, brake assist, TRAC, VSC and hill-start assist
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control systems
A sound may be heard from the engine compartment when the brake pedal is
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depressed repeatedly, 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.
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.
RX450h_U_OM0E023U
4-5. Using the driving support systems
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385
for more than 3 seconds
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