Lexus ES300h Owner's Manual page 275

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
●
driver' s door is opened.
Operating sound heard from the engine compartment when one or two minutes
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passed 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 and VSC systems
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After turing the TRAC and VSC 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
●
increases.
If both the TRAC and VSC systems are turned off, automatic re-enabling will not occur
when vehicle speed increases.
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
●
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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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.
ES300h_OM_OM33B71U_(U)
4-5. Using the driving support systems
275
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