Lexus RC300h 2017, Manual

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4-5. Using the driving support systems
RC300h_EE(OM24740E)
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Sounds and vibrations caused by the ABS, brake assist, TRC, VSC 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.
●
A motor sound may be heard after the vehicle comes to a stop.
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ECB operating sound
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-
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
passed after the stop of the hybrid system.
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EPS operation sound
When the steering wheel is operated, a motor sound may be heard. This does not indi-
cate a malfunction.
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Reactivation of the TRC/VSC systems
Even after the TRC/VSC systems have been turned off, turning the hybrid system off and
then on again will automatically reactivate the TRC/VSC systems.
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Reactivation of the TRC system linked to vehicle speed
When only the TRC system is turned off, the TRC system will turn on when vehicle speed
increases. However, when both TRC and VSC systems are turned off, the systems will
not turn on even when vehicle speed increases.
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Reduced effectiveness of the EPS system
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.
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Operating conditions of hill-start assist control
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).
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The vehicle is stopped.
●
The accelerator pedal is not depressed.
●
The parking brake is not engaged.
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Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
●
The shift lever is moved to P or N.
●
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.