Lexus LS 500h 2019, Owner'S Manual

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388 4-5. Using the driving support systems
●
When the steering wheel has been held
fully to the left or right
The center position of the steering wheel
may change when VGRS is disabled. How-
ever, the position will return to normal after
VGRS is reactivated.
■
When the 12-volt battery is discon-
nected (vehicles with VGRS)
The steering wheel may move from its
straight forward position, but this will be
corrected automatically when driving.
■
Sounds and vibrations caused by the
ABS, brake assist, VSC, TRC, hill-start
assist control and VGRS 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 indi-
cate that a malfunction has occurred in
any of these systems.
●
Any of the following conditions may
occur when the above systems are oper-
ating. None of these indicates that a mal-
function 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 indicate 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 sys-
tem.
■
EPS, VGRS and DRS operation sound
When the steering wheel is operated, a
motor sound (whirring sound) may be
heard. This does not indicate a malfunction.
■
Automatic reactivation of TRC and
VSC systems
After turning the TRC and VSC systems off,
the systems will be automatically re-ena-
bled 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.
■
Reduced effectiveness of the EPS sys-
tem
The effectiveness of the EPS system is
reduced to prevent the system from over-
heating 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.
■
Secondary Collision Brake operating
conditions
The vehicle speed is approximately 10 km/h
(6 mph) or more and the airbag sensor
detects a collision. (The Secondary Colli-
sion Brake will not operate when the vehicle
speed is below approximately 10 km/h [6
mph].)
■
Secondary Collision Brake automatic
cancellation
The Secondary Collision Brake is automati-
cally canceled in the following situations:
●
The vehicle speed drops below approxi-
mately 10 km/h (6 mph)
●
A certain amount of time elapses during
operation
●
The accelerator pedal is depressed a
large amount
■
Operating conditions of emergency
brake signal
When the following three conditions are
met, the emergency brake signal will oper-
ate:
LS500h_OM_General_OM50J66E