Lexus LS500 Manual page 187

3
Near
The warning will begin to operate later
than with the default timing.
■ Operational conditions
The pre-collision system is enabled and the
system determines that the possibility of a
frontal collision with a vehicle or pedestrian
is high.
Each function is operational at the following
speeds:
● Pre-collision warning:
• Vehicle speed is between approximately
7 and 110 mph (10 and 180 km/h). (For
detecting a pedestrian, vehicle speed is
between approximately 7 and 50 mph
[10 and 80 km/h].)
• The relative speed between your vehicle
and the vehicle or pedestrian ahead is
approximately 7 mph (10 km/h) or more.
Pre-collision brake assist:
●
• Vehicle speed is between approximately
20 and 110 mph (30 and 180 km/h). (For
detecting a pedestrian, vehicle speed is
between approximately 20 and 50 mph
[30 and 80 km/h].)
• The relative speed between your vehicle
and the vehicle or pedestrian ahead is
approximately 20 mph (30 km/h) or
more.
● Pre-collision braking:
• Vehicle speed is between approximately
7 and 110 mph (10 and 180 km/h). (For
detecting a pedestrian, vehicle speed is
between approximately 7 and 50 mph
[10 and 80 km/h].)
• The relative speed between your vehicle
and the vehicle or pedestrian ahead is
approximately 7 mph (10 km/h) or more.
The system may not operate in the following
situations:
If a 12-volt battery terminal has been dis-
●
connected and reconnected and then the
vehicle has not been driven for a certain
amount of time
● If the shift position is in R
● If VSC is disabled (only the pre-collision
warning function will be operational)
If the PCS warning light is flashing or illu-
●
LC500_LC500h_OM_OM11405U_(U)
4-5. Using the driving support systems
minated
■ Pedestrian detection function
The pre-collision system detects pedestri-
ans based on the size, profile, and motion of
a detected object. However, a pedestrian
may not be detected depending on the sur-
rounding brightness and the motion, pos-
ture, and angle of the detected object,
preventing the system from operating prop-
erly. (P.189)
■ Cancelation of the pre-collision braking
If either of the following occur while the
pre-collision braking function is operating, it
will be canceled:
The accelerator pedal is depressed
●
strongly.
● The steering wheel is turned sharply or
abruptly.
Conditions under which the system may
■
operate even if there is no possibility of a
collision
● In some situations such as the following,
the system may determine that there is a
possibility of a frontal collision and oper-
ate.
• When passing a vehicle or pedestrian
• When changing lanes while overtaking a
preceding vehicle
• When overtaking a preceding vehicle
that is changing lanes
• When overtaking a preceding vehicle
that is making a left/right turn
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