Page 195 of 588

1954-2. Driving procedures
4
Driving
IS250_EE(OM53C51E)
■When “Check Entry & Start System” is displayed on the multi-information display
The system may be malfunctioning. Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional immediately.
■If the electronic key battery is depleted
→P. 5 2 1
■Operation of the engine switch
●When operating the engine switch, one short, firm press is enough. If the switch is
pressed improperly, the engine may not start or the engine switch mode may not
change. It is not necessary to press and hold the switch.
●If attempting to restart the engine immediately after turning the engine switch off, the
engine may not start in some cases. After turning the engine switch off, please wait a
few seconds before restarting the engine.
■If the smart entry & start system has been deactivated by a customized setting
→P. 5 2 4
CAUTION
■When starting the engine
Always start the engine while sitting in the driver’s seat. Do not depress the accelerator
pedal while starting the engine under any circumstances.
Doing so may cause an accident resulting in death or serious injury.
■Caution while driving
If engine failure occurs while the vehicle is moving, do not lock or open the doors until
the vehicle reaches a safe and complete stop. Activation of the steering lock in this cir-
cumstance may lead to an accident, resulting in death or serious injury.
■Stopping the engine in an emergency
If you want to stop the engine in an emergency while driving the vehicle, press and hold
the engine switch for more than 2 seconds, or press it briefly 3 times or more in succes-
sion. (→P. 4 6 7 )
However, do not touch the engine switch while driving except in an emergency. Turning
the engine off while driving will not cause loss of steering or braking control, but the
power assist to these systems will be lost. This will make it more difficult to steer and
brake, so you should pull over and stop the vehicle as soon as it is safe to do so.
Page 200 of 588

2004-2. Driving procedures
IS250_EE(OM53C51E)
To enter M mode, shift the shift lever to M. Gears can then be selected by oper-
ating the shift lever or paddle shift switches, allowing you to drive in the gear of
your choice.
Upshifting
Downshifting
The gear changes once every time the
shift lever or paddle shift switch is oper-
ated.
The selected gear, from M1 to M6, will
be fixed and displayed in the meter.
When in the M position, the gear will not change unless the shift lever or pad-
dle shift switches are operated.
However, even when in the M position, the gears will be automatically
changed in the following situation:
●When vehicle speed drops (downshift only).
●When the automatic transmission fluid or engine coolant temperature is
low.
●When automatic transmission fluid temperature is high.
●When the needle of the tachometer is in the red zone (the range which
exceeds the allowable revs of the engine).
In the following situations, the gear will not shift even if the shift lever or paddle
shift switches are operated.
●“1st Gear not available due to slippery road surface” is displayed on the
multi information display.
●The vehicle speed is low (upshift only).
Selecting gears in the M position
1
2
Page 202 of 588

2024-2. Driving procedures
IS250_EE(OM53C51E)
■Downshifting restriction warning buzzer
To help ensure safety and driving performance, downshifting operation may sometimes
be restricted. In some circumstances, downshifting may not be possible even when the
shift lever or paddle shift switch is operated. (A buzzer will sound twice.)
■Snow mode automatic deactivation
Snow mode is automatically deactivated if the engine switch is turned off after driving in
snow mode.
■Gear position display on the multi-information display
When Gear positions is selected for a Drive Information screen on the multi-information
display and the shift lever is in the D or M position, the currently selected gear position
will be displayed on the multi-information display. (The display changes according to the
shift lever position and driving conditions.)
■When driving with cruise control or dynamic radar cruise control activated
Even when performing the following actions with the intent of enabling engine braking,
engine braking will not activate because cruise control or dynamic radar cruise control
will not be canceled.
●While driving in the D position, downshifting to 5 or 4. (→P. 225, 229)
●When switching the driving mode to sport mode while driving in D position. (→P. 2 6 3 )
■If the shift lever cannot be shifted from P
→P. 5 2 3
■AI-SHIFT
The AI-SHIFT automatically selects the suitable gear according to driver performance
and driving conditions.
The AI-SHIFT automatically operates when the shift lever is in D. (Shifting the shift lever
to the M position cancels the function.)
CAUTION
■When driving on slippery road surfaces
Be careful of downshifting and sudden acceleration, as this could result in the vehicle
skidding to the side or spinning.
■Gear Shift Indicator display (if equipped)
For safety, the driver should not look only at the display. Refer to the display when it is
safe to do so while considering actual traffic and road conditions.
Failure to do so may lead to an accident.
Page 203 of 588
2034-2. Driving procedures
4
Driving
IS250_EE(OM53C51E)
The lever will return to its original position immediately after operation.
Right turn
Lane change to the right (move the
lever partway and release it)
The right hand signals will flash 3 times.
Lane change to the left (move the
lever partway and release it)
The left hand signals will flash 3 times.
Left turn
■If the turn signals do not stop flashing after turning left or right, or if you want
to stop them flashing
Operate the lever in the opposite direction to either position or .
If you move the lever to either position or , the selected turn signals will
flash.
Turn signal lever
Operating instructions
1
2
3
4
23
14
Page 204 of 588
2044-2. Driving procedures
IS250_EE(OM53C51E)
■Turn signals can be operated when
The engine switch is in IGNITION ON mode.
■If the indicator flashes faster than usual
Check that a light bulb in the front or rear turn signal lights has not burned out.
■If the turn signals stop flashing before a lane change has been performed
Operate the lever again.
■Customization
The number of times the turn signals flash during a lane change can be changed.
(Customizable feature →P. 5 5 1 )
Page 226 of 588
2264-5. Using the driving support systems
IS250_EE(OM53C51E)
To change the set speed, operate the lever until the desired set speed is obtained.
Increases the speed
Decreases the speed
Fine adjustment: Momentarily move the
lever in the desired direction.
Large adjustment: Hold the lever in the
desired direction.
The set speed will be increased or decreased as follows:
Fine adjustment: By approximately 1.6 km/h (1 mph) each time the lever is operated.
Large adjustment: The set speed can be increased or decreased continually until the
lever is released.
Pulling the lever toward you cancels
the constant speed control.
The speed setting is also canceled when
the brakes are applied.
Pushing the lever up resumes the
constant speed control.
Resuming is available when the vehicle
speed is more than approximately 40
km/h (25 mph).
Adjusting the set speed
1
2
Canceling and resuming the constant speed control
1
2
Page 231 of 588

2314-5. Using the driving support systems
4
Driving
IS250_EE(OM53C51E)
To change the set speed, operate the lever until the desired set speed is dis-
played.
Increases the speed
Decreases the speed
Fine adjustment: Momentarily move the
lever in the desired direction.
Large adjustment: Hold the lever in the
desired direction.
In the vehicle-to-vehicle distance control mode, the set speed will be increased or
decreased as follows:
• When the set speed is shown in “MPH”
Fine adjustment: By approximately 8 km/h (5 mph) each time the lever is operated
Large adjustment: By approximately 8 km/h (5 mph) for each 0.3 seconds the
lever is held
• When the set speed is shown in “km/h”
Fine adjustment: By approximately 5 km/h (3.1 mph) each time the lever is oper-
ated
Large adjustment: By approximately 5 km/h (3.1 mph) for each 0.3 seconds the
lever is held
In the constant speed control mode (→P. 234), the set speed will be increased or
decreased as follows:
Fine adjustment: By approximately 1.6 km/h (1 mph) each time the lever is operated
Large adjustment: The set speed can be increased or decreased continually until the
lever is released.
Adjusting the set speed
1
2
Page 246 of 588

2464-5. Using the driving support systems
IS250_EE(OM53C51E)
NOTICE
■To prevent damage to or incorrect operation of the LDA system
●Do not modify the headlights or attach stickers to the surface of the lights.
●Do not modify the suspension or replace it with non-genuine parts.
●Do not install or place anything on the hood or the grille. Also, do not install a grille
guard (bull bars, kangaroo bar etc.).
●If your windshield needs repairs, contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
■Camera sensor
Observe the following to ensure that the LDA system functions correctly.
●Keep the windshield clean at all times.
Performance could be affected if the windshield is dirty, or if raindrops, condensation
or ice are adhering to the windshield.
●Do not spill liquid onto the camera sensor.
●Do not attach window tinting to the windshield.
●Do not install an antenna in front of the camera lens.
●If the windshield is fogged up, use the windshield defogger to remove fog from the
windshield.
When it is cold, using the heater with air blowing to the feet may allow the upper part
of the windshield to fog up. This will have a negative effect on the images.
●Do not scratch the camera lens, or let it get dirty.
When cleaning the inside of the windshield, be careful not to get any glass cleaner
etc. on the lens. Also, do not touch the lens.
For lens repair, contact any authorized Lexus dealer or repairer, or another duly qual-
ified and equipped professional.
●Do not change the installation position or direction of the camera sensor or remove it.
The direction of the camera sensor is precisely adjusted.
●Do not subject the camera sensor to strong impact or force, and do not disassemble
the camera sensor.
●Do not replace windshield with non-genuine windshield.
Contact any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
●Do not attach a sticker or other items to the
windshield near the camera sensor.