cruise control LEXUS RX350 2011 Owner's Manual

213
2-4. Using other driving systems
2

When driving
Example of follow-up cruising
When following a vehicle driving slower than the set speed
The system continues follow-up cruising while adjusting for changes in the
speed of the vehicle ahead in order to maintain the vehicle-to-vehicle dis-
tance set by the driver.
Example of acceleration
When there no longer are vehicles driving slower than the set speed in
the lane ahead
When the vehicle ahead of you executes a lane change, the system slowly
accelerates until the set speed is reached. The system then returns to con-
stant speed cruising.
Approach warning
When your vehicle is too close to a vehicle ahead, and sufficient auto-
matic deceleration via the cruise control is not possible, the display will
flash and a buzzer will sound to alert the driver. An example of this would
be if another driver cuts in front of you while you are following a vehicle.
Apply the brakes to ensure an appropriate vehicle-to-vehicle distance.
nDynamic radar cruise can be set when
lThe shift lever is in D. (Recommended)
Dynamic radar cruise control can also be set when the shift lever is in the S posi-
tion and range “4”, “5”, or “6” has been selected.
lVehicle speed is above approximately 30 mph (50 km/h).
nSwitching modes
The mode cannot be switched to constant speed control mode if vehicle-to-vehicle
distance control mode has been used. The mode also cannot be switched from
constant speed control to vehicle-to-vehicle distance control mode. Turn the sys-
tem off by pressing the “ON-OFF” button, and turn it on again.
nAccelerating
The vehicle can accelerate normally. After acceleration, the set speed resumes.

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2-4. Using other driving systems
nAutomatic cancelation of vehicle-to-vehicle distance control
Vehicle-to-vehicle distance control driving is automatically canceled in the follow-
ing situations:
lActual vehicle speed falls below approximately 25 mph (40 km/h).
lVSC is activated.
lThe sensor cannot operate correctly because it is covered in some way.
lThe windshield wipers are operating at high speed.
lWhen snow mode is set.
If vehicle-to-vehicle distance control driving is automatically canceled for any other
reason, there may be a malfunction in the system. Contact your Lexus dealer.
nAutomatic cancelation of constant speed control
The cruise control will stop maintaining the vehicle speed in the following situations:
lActual vehicle speed is more than 10 mph (16 km/h) below the set vehicle
speed.
At this time, the memorized set speed is not retained.
lVehicle speed falls below approximately 25 mph (40 km/h).
lVSC is activated.
nVehicle-to-vehicle distance settings
Select a distance from the table below. Note that the distances shown correspond
to a vehicle speed of 50 mph (80 km/h). Vehicle-to-vehicle distance increases/
decreases in accordance with vehicle speed.
Distance optionsVehicle-to-vehicle distance
LongApproximately 164 f t. (50 m)
MediumApproximately 132 ft. (40 m)
ShortApproximately 82 ft. (25 m)

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2-4. Using other driving systems
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When driving
nRadar sensor and grille cover
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 and plas-
tic objects, cannot be detected by the obstruction sensor.)
Dynamic radar cruise control is canceled if an obstruction is detected.
nWarning lights and messages for dynamic radar cruise control
Warning lights and messages are used to indicate a system malfunction or to inform
the driver of the need for caution while driving. (→P. 5 5 1 )
nApproach warning
In the following instances, there is a possibility that the approach warnings will not
occur:
lWhen the speed of the vehicle ahead matches or exceeds your vehicle speed
lWhen the vehicle ahead is traveling at an extremely slow speed
lImmediately after the cruise control speed was set
lAt the instant the accelerator is applied
Grille cover
Radar sensor

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2-4. Using other driving systems
nCertification
For vehicles sold in U.S.A.
FCC ID: HYQDNMWR005
This device complies with Part 15 of the FCC Rules. Operation is subject to the fol-
lowing two conditions: (1) this device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
FCC WARNING
Changes or modifications not expressly approved by the party responsible for
compliance could void the use’s authority to operate the equipment.
Radio frequency radiation exposure Information:
This equipment complies with FCC radiation exposure limits set forth for an uncon-
trolled environment.
This equipment should be installed and operated with minimum distance of 20 cm
between the radiator and your body.
This transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter.
For vehicles sold in Canada
Operation is subject to the following two conditions: (1) this device may not cause
interference, and (2) this device must accept any interference, including interfer-
ence that may cause undesired operation of the device.
CAUTION
nBefore using dynamic radar cruise control
Do not overly rely on vehicle-to-vehicle distance control.
Be aware of the set speed. If automatic deceleration/acceleration is not appropri-
ate, adjust the vehicle speed, as well as the distance between your vehicle and vehi-
cles ahead by applying the brakes etc.

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2-4. Using other driving systems
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When driving
CAUTION
nCautions regarding the driving assist systems
Observe the following precautions.
Failure to do so may cause an accident resulting in death or serious injury.
lAssisting the driver to measure following distance
The dynamic radar cruise control is only intended to help the driver in determin-
ing the following distance between the driver's own vehicle and a designated
vehicle traveling ahead. It is not a mechanism that allows careless or inattentive
driving, and it is not a system that can assist the driver in low-visibility conditions. It
is still necessary for driver to pay close attention to the vehicle's surroundings.
lAssisting the driver to judge proper following distance.
The dynamic radar cruise control determines whether the following distance
between the driver's own vehicle and a designated vehicle traveling ahead is
appropriate or not. It is not capable of making any other type of judgement.
Therefore, it is absolutely necessary for the driver to remain vigilant and to deter-
mine whether or not there is a possibility of danger in any given situation.
lAssisting the driver to operate the vehicle
The dynamic radar cruise control has no capability to prevent or avoid a collision
with a vehicle traveling ahead. Therefore, if there is ever any danger, the driver
must take immediate and direct control of the vehicle and act appropriately in
order to ensure the safety of all involved.
nTo avoid inadvertent dynamic radar cruise control activation
Switch the cruise control off using the “ON-OFF” button when not in use.

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2-4. Using other driving systems
CAUTION
nSituations unsuitable for dynamic radar cruise control
Do not use dynamic radar cruise control in any of the following situations.
Doing so may result in inappropriate speed control and could cause an accident
resulting in death or serious injury.
lIn heavy traffic
lOn roads with sharp bends
lOn winding roads
lOn slippery roads, such as those covered with rain, ice and snow
lOn steep downhills, or where there are sudden changes between sharp up and
down gradients
lAt entrances to expressways
lWhen weather conditions are bad enough that they may prevent the sensors
from functioning correctly (fog, snow, sandstorm, heavy rain, etc.)
lWhen a buzzer is heard often
lWhen your vehicle is towing anything
nWhen the sensor may not be correctly detecting the vehicle ahead
Apply the brakes as necessary when any of the following types of vehicles are in
front of you.
As the sensor may not be able to correctly detect these types of vehicles, the
approach warning (→P. 213) will not be activated, and an accident may result.
lVehicles that cut in suddenly
lVehicles traveling at low speeds
lVehicles that are not moving
lVehicles with small rear ends (trailers with no load on board etc.)
lMotorcycles traveling in the same lane

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2-4. Using other driving systems
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When driving
CAUTION
nConditions under which the vehicle-to-vehicle distance control may not function
correctly
Apply the brakes as necessary in the following conditions as the radar sensor may
not be able to correctly detect vehicles ahead, and an accident may result:
lWhen water or snow thrown up by the surrounding vehicles hinders the function-
ing of the radar sensor
lWhen your vehicle is pointing upwards (caused by a heavy load in the luggage
compartment etc.)
lWhen the road curves or when the lanes are narrow
lWhen steering wheel operation or your position in the lane is unstable
lWhen the vehicle ahead of you decelerates suddenly
nTo ensure the radar sensor functions correctly
Do not do the following to the sensor or grille as doing so may cause the sensor not
to function correctly and could result in an accident:
lSticking or attaching anything to them
lLeaving them dirty
lDisassembling or subjecting them to strong shocks
lModifying or painting them
lReplacing them with non-genuine parts
nHandling the radar sensor
Observe the following to ensure the cruise control system can function effectively:
lKeep the sensor and front grille clean at all times.
Clean the sensor and front grille with a soft cloth so you do not mark or damage
them.
lDo not subject the sensor or surrounding area to a strong impact.
If the sensor moves even slightly off position, the system may malfunction. If the
sensor or surrounding area is subject to a strong impact, always have the area
inspected and adjusted by your Lexus dealer.
lDo not disassemble the sensor.
lDo not attach accessories or stickers to the sensor, grille or surrounding area.
lDo not modify or paint the sensor and grille.

267
2-5. Driving information
2

When driving
CAUTION
nTrailer towing precautions
lFollow all the instructions described in this section. Failure to do so could cause
an accident resulting in death or serious injury.
lExceeding the towing capacity, GVWR or GAWR can cause an accident result-
ing in death or serious personal injuries.
nTo avoid accident or injury
lDo not exceed the trailer hitch assembly weight, gross vehicle weight, gross axle
weight and trailer tongue load capacities.
lNever load more weight in the back than in the front of the trailer. About 60% of
the load should be in the front half of the trailer, and the remaining 40% in the
rear.
lDo not use cruise control when you are towing.
lThe tow hitch receiver installed on your vehicle must never be used on another
vehicle.
lDo not exceed 45 mph (72 km/h) or the posted towing speed limit, whichever is
lower. As instability (swaying) of the towing vehicle-trailer combination increases
as speed increases, exceeding 45 mph (72 km/h) may cause loss of control.
lSlow down and downshift before descending steep or long downhill grades. Do
not make sudden downshifts.
lAvoid holding the brake pedal down too long or applying the brakes too fre-
quently. This could cause the brakes to overheat and result in reduced braking
efficiency.
lDo not tow the vehicle with the compact spare tire installed.

504
4-3. Do-it-yourself maintenance
35AFS7. 5 AAdaptive front-lighting system
36BK/UP LP7. 5 ABack-up lights
37HEATER NO. 27. 5 AAir conditioning system, AWD system
38ECU IG110 A
Adaptive front-lighting system, head-
light cleaner, cooling fan, cruise con-
trol, vehicle stability control, vehicle
dynamics integrated management
39EFI NO. 210 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
40F/ P U M P15 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
41DEICER25 AWindshield wipers and washer
42STOP7. 5 A
Vehicle stability control, vehicle
dynamics integrated management,
high mounted stoplight
43TOW I N G BAT T20 ATrailer battery
44TOW I N G30 ATrailer lights
45FILTER10 ACondenser
46IG1 MAIN30 AECU IG1, BK/UP LP,
HEATER NO. 2, AFS
47H-LP RH HI15 ARight-hand headlight (high beam)
48H-LP LH HI15 ALeft-hand headlight (high beam)
49BIXENON10 ADischarge headlight
50H-LP RH LO15 ARight-hand headlight (low beam)
51H-LP LH LO15 ALeft-hand headlight (low beam)
FuseAmpereCircuit

5

When trouble arises
549
5-2. Steps to take in an emergency
(Flashes)
or
(Flashes)
(If equipped)
Indicates a malfunction in the radar cruise control
system
Press the “ON-OFF” button once to deactivate the
system, and then press the button again to reactivate
the system.
(If equipped)
Indicates a malfunction in the automatic headlight
leveling system
Indicates a malfunction in: