Lexus LS 500 2019 Owner's Manual page 245

mph (30 km/h) or more.
(However, when the vehicle speed is set
while driving at below approximately 20
mph [30 km/h], the set speed will be set
to approximately 20 mph [30 km/h].)
Accelerating after setting the vehicle
■
speed
The vehicle can accelerate by operating the
accelerator pedal. After accelerating, the
set speed resumes. However, during vehi-
cle-to-vehicle distance control mode, the
vehicle speed may decrease below the set
speed in order to maintain the distance to
the preceding vehicle.
■ When the vehicle stops while follow-up
cruising
Pressing the "+RES" switch while the
●
vehicle ahead stops will resume follow-up
cruising if the vehicle ahead starts off
within approximately 3 seconds after the
switch is pressed.
If the vehicle ahead starts off within 3 sec-
●
onds after your vehicle stops, follow-up
cruising will be resumed.
Automatic cancelation of vehi-
■
cle-to-vehicle distance control mode
Vehicle-to-vehicle distance control mode is
automatically canceled in the following situ-
ations.
● VSC is activated.
TRAC is activated for a period of time.
●
● When the VSC or TRAC system is
turned off.
● When snow mode is set.
● The sensor cannot detect correctly
because it is covered in some way.
● Pre-collision braking is activated.
The parking brake is operated.
●
● The vehicle is stopped by system control
on a steep incline.
The following are detected when the
●
vehicle has been stopped by system con-
trol:
• The driver is not wearing a seat belt.
• The driver's door is opened.
• The vehicle has been stopped for about 3
minutes.
LS500_OM_(U)_1810
4-5. Using the driving support systems
If vehicle-to-vehicle distance control mode
is automatically canceled for any reasons
other than the above, there may be a mal-
function in the system. Contact your Lexus
dealer.
Automatic cancelation of constant
■
speed control mode
Constant speed control mode is automati-
cally canceled in the following situations:
Actual vehicle speed is more than
●
approximately 10 mph (16 km/h) below
the set vehicle speed.
● Actual vehicle speed falls below approxi-
mately 20 mph (30 km/h).
VSC is activated.
●
● TRAC is activated for a period of time.
When the VSC or TRAC system is
●
turned off.
● Pre-collision braking is activated.
If constant speed control mode is automati-
cally canceled for any reasons other than
the above, there may be a malfunction in the
system. Contact your Lexus dealer.
Brake operation
■
A brake operation sound may be heard and
the brake pedal response may change, but
these are not malfunctions.
Warning messages and buzzers for
■
dynamic radar cruise control with
full-speed range
Warning messages and buzzers are used to
indicate a system malfunction or to inform
the driver of the need for caution while driv-
ing. If a warning message is shown on the
multi-information display, read the message
and follow the instruc-
tions.(P.196,202,425)
When the sensor may not be correctly
■
detecting the vehicle ahead
In the case of the following and depending
on the conditions, operate the brake pedal
when deceleration of the system is insuffi-
cient or operate the accelerator pedal
when acceleration is required.
As the sensor may not be able to correctly
detect these types of vehicles, the approach
warning (P.243) may not be activated.
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