2012 Lexus ES350 cruise control

174
2-4. Using other driving systems
ES350_U
CAUTION
■Situations 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.
●In heavy traffic
●On roads with sharp bends
●On winding roads
●On slippery roads, such as those covered with rain, ice and snow
●On steep downhills, or where there are sudden changes between sharp up and
down gradients
Vehicle speed may exceed the set speed when driving down a steep hill.
●At entrances to expressways
●When weather conditions are bad enough that they may prevent the sensors
from functioning correctly (fog, snow, sandstorm, heavy rain, etc.)
●When an approach warning buzzer is heard often
●During emergency towing
■When 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. 169) will not be activated, and a fatal or serious accident
may result.
●Vehicles that cut in suddenly
●Vehicles traveling at low speeds
●Vehicles that are not moving
●Vehicles with small rear ends (trailers with no load on board etc.)
●Motorcycles traveling in the same lane

175
2-4. Using other driving systems
2
When driving
ES350_U
CAUTION
■Conditions 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 a fatal or serious accident may
result:
●When water or snow thrown up by the surrounding vehicles hinders the function-
ing of the sensor
●When your vehicle is pointing upwards (caused by a heavy load in the trunk etc.)
●When the road curves or when the lanes are narrow
●When steering wheel operation or your position in the lane is unstable
●When the vehicle ahead of you decelerates suddenly
■Handling the radar sensor
Observe the following to ensure the cruise control system can function effectively.
Otherwise, the system may not function correctly and could result in an accident.
●Keep the sensor and grille cover clean at all times.
Clean the sensor and grille cover with a soft cloth so you do not mark or damage
them.
●Do 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 a Lexus dealer.
●Do not disassemble the sensor.
●Do not attach accessories or stickers to the sensor, grille cover or surrounding
area.
●Do not modify or paint the sensor and grille cover.
●Do not replace them with non-genuine parts.

416
4-3. Do-it-yourself maintenance
ES350_U
15ECU-IG NO. 110 A
Moon roof, seat heaters, power win-
dows, clock, automatic windshield
wiper, electric cooling fans, driving
position memory system, seat position
memory system
16ECU-IG NO. 27. 5 A
Anti-lock brake system, vehicle stabil-
ity control system, traction control sys-
tem, brake assist system, cruise
control system, stop lights, shift lock
control system
17A/C NO. 210 AAir conditioning system, rear window
defogger
18WA S H10 AWindshield washer
19S-HTR20 ASeat heaters, air conditioning system
20GAUGE NO. 110 AEmergency flashers, back-up lights,
rear sunshade, charging system
21WIP25 AWindshield wipers
22H-LP LVL7. 5 AHeadlight leveling system
23IGN10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, SRS airbag system, steering lock
system
24GAUGE NO. 27. 5 AMeters
25ECU-ACC7. 5 AClock, main body ECU
26CIG20 ACigarette lighter
27PWR OUTLET20 APo w e r o u t l e t
28RADIO NO. 27. 5 AAudio system
29MIR HTR15 AOutside rear view mirror defoggers
FuseAmpereCircuit

5
When trouble arises
451
5-2. Steps to take in an emergency
ES350_U
Wa r n i n g m e s s a g eDetails
(If equipped)
Indicates intuitive parking assist malfunction.A buzzer also sounds.
The malfunctioning assist-sensor is shown flashing on
the display.
(Flashing and then con-
tinuously on)
(Flashing)or
(Flashing)
(If equipped)Indicates a malfunction in the radar cruise control
system. A buzzer also sounds.
Press the “ON-OFF” button once to deactivate the
system, and then press the button again to reactivate
the system.

5
When trouble arises
455
5-2. Steps to take in an emergency
ES350_U
Wa r n i n g m e s s a g eDetailsCorrection procedure
(If equipped)
Indicates that the pre-
collision system is not
currently functional.• Clean the grille and the sensor.
• Wait until the pre-colli- sion system cools down.
(If equipped)
Indicates that the sensor
of intuitive parking assist
is dirty or covered with
ice.A buzzer also sounds.
Clean the sensor.
(Flashing and then con- tinuously on)
(Flashing)
(If equipped)Indicates that the radar
cruise control sensor is
dirty or covered with ice. A buzzer also sounds.
Clean the sensor.

456
5-2. Steps to take in an emergency
ES350_U*: Refer to the separate “Scheduled maintenance” or “Owner’s Manual
Supplement” for the maintenance interval applicable to your vehicle.
Wa r n i n g m e s s a g eDetailsCorrection procedure
(Flashing and then con-
tinuously on)
(Flashing)
(If equipped)
Indicates that the radar
cruise control system is
unable to judge vehicle-
to-vehicle distance
because the windshield
wipers are set at high
speed operation mode. A buzzer also sounds.
Turn them off or set them
to either the intermittent
or the slow mode.
(Flashing)
(If equipped)
Indicates that your vehi-
cle is nearing the vehicle
ahead (in radar cruise
mode). A buzzer also sounds.
Slow the vehicle by apply-
ing the brakes.
Indicates one or more
stop lights are burned
out.Have the defective bulbs
replaced by your Lexus
dealer.

5
When trouble arises
457
5-2. Steps to take in an emergency
ES350_U
■Warning light display in radar cruise mode
In the following cases, the warning light may not be displayed even if vehicle-to-
vehicle distance closes.
●When your vehicle and the vehicle ahead are traveling at the same speed or the
vehicle ahead is traveling more quickly than your vehicle
●When the vehicle ahead is traveling at a very low speed
●Immediately after cruise control speed is set
●At the instant the accelerator pedal is depressed

540
Alphabetical index
ES350_U
Child safetyAirbag precautions.............................. 94
Battery precautions ............. 388, 479
Child restraint system....................... 104
Child-protectors ................................... 43
How your child should wear
the seat belt .......................................... 62
Installing child restraints .................. 108
Moon roof precautions ...................... 77
Power window lock switch.............. 70
Power window precautions .............72
Removed electronic key
battery precautions ...................... 408
Seat belt comfort guide..................... 60
Seat belt extender precautions ..... 64
Seat belt precautions .......................... 62
Seat heater precautions ...... 328, 331
Trunk precautions ................................ 48
Child-protectors ...................................... 43
Cigarette lighter.................................... 326 Cleaning
Exterior ................................................... 358
Interior....................................................... 361
Seat belts ................................................362
Clock ......................................................... 324
Coat hooks.............................................. 336
Compass .................................................. 346
Condenser .............................................. 384
Console box ............................................. 317
Cooling system Engine overheating.......................... 480
Cornering assist sensors ..................... 176
Cruise control Cruise control.......................................160
Dynamic radar crui se control....... 164
Cup holders ..............................................319
Curtain shield airbags ...........................88
Customizable features .......................... 511