Lexus ES 300h Owner's Manual page 285

284
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 16 km/h (10 mph) below
the set vehicle speed.
Actual vehicle speed falls below approxi-
●
mately 30 km/h (20 mph).
● VSC is activated.
● TRC is activated for a period of time.
When the VSC or TRC 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
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 instructions.
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.282) may not be activated.
Vehicles that cut in suddenly
●
Vehicles traveling at low speeds
●
● Vehicles that are not moving in the same
lane
Vehicles with small rear ends (trailers
●
with no load on board, etc.)
● Motorcycles traveling in the same lane
When water or snow thrown up by the
●
surrounding vehicles hinders the detect-
ing of the sensor
● When your vehicle is pointing upwards
(caused by a heavy load in the luggage
compartment, etc.)
Preceding vehicle has an extremely high
●
ground clearance
■ Conditions under which the vehicle-to-
vehicle distance control mode may not
function correctly
In the case of the following conditions,
operate the brake pedal (or accelerator
pedal, depending on the situation) as nec-
essary.
As the sensor may not be able to correctly