Reactivation Of The Trac System Linked To Vehicle Speed; Reduced Effectiveness Of The Eps System; Operating Conditions Of Hill-Start Assist Control; Automatic System Cancelation Of Hill-Start Assist Control - Lexus rx450h Service Manual

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 vehicle
speed increases. However, when TRAC, VSC and Trailer Sway Control 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 overheating
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 hybrid system off. The EPS system should return to nor-
mal within 10 minutes.

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 moved 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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WARNING
The ABS does not operate effectively when
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The limits of tire gripping performance have been exceeded (such as excessively
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worn tires on a snow covered road).
The vehicle hydroplanes while driving at high speed on wet or slick roads.
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Stopping distance when the ABS is operating may exceed that of normal conditions
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The ABS is not designed to shorten the vehicle' s stopping distance. Always maintain a
safe distance from the vehicle in front of you, especially in the following situations:
When driving on dirt, gravel or snow-covered roads
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When driving with tire chains
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When driving over bumps in the road
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When driving over roads with potholes or uneven surfaces
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TRAC may not operate effectively when
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Directional control and power may not be achievable while driving on slippery road
surfaces, even if the TRAC system is operating.
Drive the vehicle carefully in conditions where stability and power may be lost.
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4-5. Using the driving support systems
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