Lexus LS 500 2019 Owner's Manual page 297

of the following situations:
● Shift the shift position to P or N
The accelerator pedal is depressed
●
The parking brake is engaged
●
● 2 seconds at maximum elapsed after the
brake pedal is released
VGRS is disabled when
■
VGRS may stop operating in the following
situations.
In this event, the steering wheel may move
from its straight forward position, but it will
return when the system restarts.
● When the steering wheel is operated for
an extended period of time while the
vehicle is stopped or is moving very
slowly (on vehicles with LDH, DRS is dis-
abled together with VGRS)
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 battery is disconnected (vehi-
■
cles 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, TRAC, 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 engine is
started or just after the vehicle begins to
move. This sound does not indicate 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.
• Vehicles without Lexus Safety System +
A: The brake pedal may pulsate slightly
LS500_OM_(U)_1810
4-5. Using the driving support systems
after the ABS is activated.
• Vehicles without Lexus Safety System +
A: The brake pedal may move down
slightly after the ABS is activated.
■ 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 engine.
■ 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 TRAC and
VSC systems
After turning the TRAC and VSC systems
off, the systems will be automatically
re-enabled in the following situations:
● When the engine switch is turned off
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.
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 engine off. The EPS system should
return to normal within 10 minutes.
■ Secondary Collision Brake operating
conditions
The vehicle speed is approximately 6 mph
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