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5-5. Using the driving support systems
■ Sounds and vibrations caused by
the ABS, brake assist, VSC, Trailer
Sway Control, TRC and hill-start
assist control systems
● A sound may be heard from the
engine compartment when the brake
pedal is depressed repeatedly, when
the hybrid system is started or just
after the vehicle begins to move. This
sound does not indicate that a mal-
function has occurred in any of these
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 also
after the vehicle comes to a stop.
■ ECB operating sound
ECB operating sound may be heard in
the following cases, but it does not indi-
cate that a malfunction has occurred.
● Operating sound heard from the
engine compartment when the brake
pedal is operated.
● 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.
■ Active Cornering Assist operation
sounds and vibrations
When the Active Cornering Assist is
operated, operation sounds and vibra-
tions may be generated from the brake
system, but this is not a malfunction.
■ Automatic reactivation of TRC,
Trailer Sway Control and VSC sys-
tems
After turning the TRC, Trailer Sway
Control and VSC systems off, the sys-
tems will be automatically re-enabled in
the following situations:
● When the power switch is turned off
● If only the TRC system is turned off,
the TRC will turn on when vehicle
speed increases
If both the TRC and VSC systems are
turned off, automatic re-enabling will
not occur when vehicle speed
increases.
■ Operating conditions of Active Cor-
nering Assist
The system operates when the following
occurs.
● TRC/VSC can operate
● The driver is attempting to accelerate
while turning
● The system detects that the vehicle is
drifting to the outer side
● The brake pedal is released
■ 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 sys-
tem off. The EPS system should return
to normal within 10 minutes.
■ Operating conditions of emergency
brake signal
When the following conditions are met,
the emergency brake signal will operate:
● The emergency flashers are off.
● Actual vehicle speed is over 55 km/h
(35 mph).
● The system judges from the vehicle
deceleration that it is a sudden brak-
ing operation.
■ Automatic system cancelation of
emergency brake signal
The emergency brake signal will be can-
celed in any of the following situations:
● The emergency flashers are turned
on.
● The system judges from the vehicle
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