Turning Off Trac, Vsc And Trailer Sway Control Systems; Sounds And Vibrations Caused By The Abs, Brake Assist, Trac, Vsc, Trailer Sway Control And Hill-Start Assist Control Systems; Ecb Operating Sound; Eps Operation Sound - Lexus rx450h Service Manual

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4-5. Using the driving support systems

Turning off TRAC, VSC and Trailer Sway Control systems

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To turn the TRAC, VSC and Trailer Sway Control systems off, press and hold
more than 3 seconds 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. 291)
When the message is displayed on the multi-information display showing that TRAC
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has been disabled even if
TRAC and hill-start assist control cannot be operated. Contact your Lexus dealer.
Sounds and vibrations caused by the ABS, brake assist, TRAC, VSC, Trailer Sway Con-
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trol and hill-start assist control systems
Any of the following conditions may occur when the above systems are operating. None
of these indicates that a malfunction has occurred.
Vibrations may be felt through the vehicle body and steering.
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A motor sound may be heard after the vehicle comes to a stop.
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ECB operating sound

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ECB operating sound may be heard in the following cases, but it does not indicate that a
malfunction has occurred.
Operating sound heard from the engine compartment when the brake pedal is oper-
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ated.
Motor sound of the brake system heard from the front part of the vehicle when the
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driver' s door is opened.
Operating sound heard from the engine compartment when 1 or 2 minutes passed
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after the stop of the hybrid system.

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.
Automatic reactivation of TRAC, VSC and Trailer Sway Control systems
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After turning the TRAC, VSC and Trailer Sway Control systems off, the systems will be
automatically re-enabled in the following situations:
When the power 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 the TRAC, VSC and Trailer Sway Control systems are turned off, automatic re-
enabling will not occur when vehicle speed increases.
RX450h_U_OM0E013U
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has not been pressed
for