Toyota RAV4 HYBRID 2017 Manual page 311

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Sounds and vibrations caused by the ABS, brake assist, VSC, Trailer
Sway Control, TRAC and the hill-start assist control systems
Any of the following conditions may occur when the above systems are oper-
ating. None of these indicates that a malfunction has occurred.
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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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The brake pedal may pulsate slightly after the ABS is activated.
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The brake pedal may move down slightly after the ABS is activated.
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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.
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Operating sound heard from the engine compartment when the brake pedal
is operated.
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Motor sound of the brake system heard from the front part of the vehicle
when the driver's door is opened.
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Operating sound heard from the engine compartment when 1 or 2 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 (whirring sound) may be
heard. This does not indicate a malfunction.
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Automatic reactivation of TRAC, VSC and Trailer Sway Control systems
After turning the TRAC, VSC and Trailer Sway Control systems off, the sys-
tems will be automatically re-enabled in the following situations:
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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 the TRAC, VSC and Trailer Sway Control systems are turned off, auto-
matic re-enabling will not occur 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 normal 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:
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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.
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The accelerator pedal is not depressed.
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The parking brake is not engaged.
RAV4-HV_OM_OM42B03U_(U)
4-5. Using the driving support systems
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