Lexus LX570 Manual page 216

2-4. Using other driving systems
Radar sensor and grille cover
■
If the dynamic radar cruise control is used on a road with very light traffic and very
little to reflect the radar waves emitted by the radar sensor, the system may decide
that the radar sensor is dirty, even if the sensor is not actually dirty. In this case,
switch to the conventional constant speed control mode. (P. 210)
Approach warning
■
In the following instances, there is a possibility that the warnings will not occur:
When the speed of the vehicle ahead matches or exceeds your vehicle' s speed
●
When the vehicle ahead is traveling at an extremely slow speed
●
Immediately after the cruise control speed has been set
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At the instant the accelerator is applied
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LX570_U (OM60F86U)
Always keep the sensor and grille cover
clean to ensure that the vehicle-to-vehicle
distance control operates properly. (Some
obstructions, such as snow, ice or plastic
objects, cannot be detected by the obstruc-
tion sensor.)
Dynamic radar cruise control is canceled if
an obstruction is detected.