2020 Lexus IS350 engine

1954-2. Driving procedures
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Driving
IS350 AWD/IS350/IS300 AWD/IS300_U
■Automatic deactivation of shift range selection in the D position
Shift range selection in the D position will be deactivated in the following situations:
●When the vehicle comes to a stop
●If the accelerator pedal is depressed fo r more than a certain period of time
●When the shift lever is shifted to a position other than D
■To protect the automatic transmission
“Transmission Fluid Temp High See Owner’s Manual” is displayed on the multi-informa-
tion display and a function is adopted that automatically selects a higher shift range when
the fluid temperature is high. Have the vehicle inspected by your Lexus dealer.
■Downshifting restriction warning buzzer
To help ensure safety and driving performance, downshifti ng operation may sometimes
be restricted. In some circum stances, downshifting may not be possible even when the
shift lever or paddle shif t switch is operated. (A buzzer will sound twice.)
■Snow mode automatic deactivation
Snow mode is automatically deactivated if the engine switch is turn ed 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 disp lay. (The display changes according to the
shift lever position and driving conditions.)
■When driving with dynamic radar cruise control activated
Even when performing the following actions with the intent of enabling engine braking,
engine braking will not activate because dy namic radar cruise control will not be can-
celed.
●8-speed models: While driving in the D posi tion, downshifting to 7, 6, 5 or 4.
(  P. 248)
●6-speed models: While driving in the D position, downshifting to 5 or 4.
( P. 248)
●When switching the driving mode to sport mode while driving in D position.
( P. 297)
■Restraining sudden start (Drive-Start Control)
●When the following unusual operation is performed, the engine output may be
restrained.
• When the shift lever is shifted from R to D, D to R, N to R, P to D, or P to R (D
includes M) with the accelerator pedal depressed, a warning message appears on
the multi-information display. ( P. 537)
• When the accelerator pedal is depressed t oo much while the vehicle is in reverse.

1964-2. Driving procedures
IS350 AWD/IS350/IS300 AWD/IS300_U
■Shift lock system
The shift lock system is a system to prevent ac cidental operation of the shift lever in start-
ing.
The shift lever can be shifted from P only when the engine switch is in IGNITION ON
mode and the brake pedal is being depressed.
■If the shift lever cannot be shifted from P
First, check whether the brak e pedal is being depressed.
If the shift lever cannot be shifted with your foot on the brake pedal, there may be a prob-
lem with the shift lock system. Have the vehi cle inspected by your Lexus dealer immedi-
ately.
The following steps may be used as an emergency measure to ensure that the shift lever
can be shifted.
Releasing the shift lock:
Set the parking brake.
Turn the engine switch to off.
Depress the brake pedal.
■AI-SHIFT
●The AI-SHIFT automatically selects the suitab le gear according to driver performance
and driving conditions.
The AI-SHIFT automatically operates when the sh ift lever is in D. (Shifting the shift lever
to the M position cancels the function.)
●8-speed models: The G AI-SHIFT is automa tically changed to a suitable gear step
while running in sport mode according to the driving operations and running condi-
tions.
The G AI-SHIFT automatically operates when the drive mode select switch is set to
sport mode with the shift leve r in the D position. (The function will be canceled, if the
drive mode is select switch is set to normal mode or shift lever is put in the M position.)
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Pry the cover up with a flathead screwdriver
or equivalent tool.
To prevent damage to the cover, cover the tip
of the screwdriver with a rag.
Press the shift lock override button.
The shift lever can be shifted while the button
is pressed.4
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1994-2. Driving procedures
4
Driving
IS350 AWD/IS350/IS300 AWD/IS300_U
■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 befo re a lane change has been performed
Operate the lever again.
■Customization
The number of times the turn signals flas h during a lane change can be changed.
(Customizable feature P. 613)

202
IS350 AWD/IS350/IS300 AWD/IS300_U4-3. Operating the lights and wipers
Operating the switch turn
s on the lights as follows:
Headlight switch
The headlights can be operated manually or automatically.
Operating instructions
(U.S.A.) (Canada)
The side marker, parking, tail,
license plate, instrument panel
lights, and daytime running
lights(P. 204) turn on.
The headlights and all lights
listed above (except daytime
running lights) turn on.
The headlights, parking lights,
daytime running lights ( P.
204) and all the lights listed
above turn on and off auto-
matically.
(When the engine switch is in
IG NITION ON mode.)
Off
The daytime

running lights
turn on. ( P. 204)
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(U.S.A.)
(Canada)

2044-3. Operating the lights and wipers
IS350 AWD/IS350/IS300 AWD/IS300_U
■Daytime running light system
●The daytime running lights illuminate using th e same lights as the parking lights and illu-
minate brighter than the parking lights.
●To make your vehicle more visible to other drivers during daytime driving, the daytime
running lights turn on automatically when a ll of the following conditions are met. (The
daytime running lights are not designed for use at night.)
• The engine is running
• The parking brake is released
• The headlight switch is in the (Canada only), or
* position
*: When the surroundings are bright
The daytime running lights remain on after they illuminate, even if the parking brake is set
again.
●For the U.S.A.: Daytime running lights can be turned off by operating the switch.
●Compared to turning on the headlights, the daytime running light system offers greater
durability and consumes less electricity, so it can help improve fuel economy.
■Headlight control sensor
■Automatic light off system
When the light switch is in , or : Th e headlights and tail lights turn off 30 sec-
onds after the engine switch is turned to ACCESSORY mode or turned off and a door is
opened and all of the doors and trunk are cl osed. (The lights turn off immediately if
on the key is pressed twice af ter all the doors are closed.)
To turn the lights on again, turn the engine switch to IGNITION ON mode, or turn the
light switch off once and then back to or .
If any of the doors or trunk lid is left open , the lights automatically turn off after 20 min-
utes.
■Automatic headlight leveling system
The level of the headlights is automatically adjusted accordi ng to the number of passen-
gers and the loading condition of the vehicle to ensure that the headlights do not inter-
fere with other road users. The sensor may not function properly if an
object is placed on the sensor, or anything that
blocks the sensor is affixed to the windshield.
Doing so interferes with the sensor detecting
the level of ambient light and may cause the
automatic headlight system to malfunction.

2054-3. Operating the lights and wipers
4
Driving
IS350 AWD/IS350/IS300 AWD/IS300_U
■Light reminder buzzer
A buzzer sounds when the engine switch is turned off or turned to ACCESSORY mode
and the driver’s door is opened while the lights are turned on.
■Customization
Settings (e.g. light sensor sensitivity) can be changed.
(Customizable features: P. 613)
NOTICE
■To prevent battery discharge
Do not leave the lights on longer than necessary when the engine is not running.

2094-3. Operating the lights and wipers
4
Driving
IS350 AWD/IS350/IS300 AWD/IS300_U
●Bicycles or similar vehicles may not be detected.
●In the following situations the system may not be able to correctly detect the surround-
ing brightness level. This may cause the low beams to remain on or the high beams to
flash or dazzle pedestrians or vehicles ahead. In such a case, it is necessary to manually
switch between the high and low beams.
• When driving in inclement weather (heavy rain, snow, fog, sandstorms, etc.)
• When the windshield is obscured by fog, mist, ice, dirt, etc.
• When the windshield is cracked or damaged
• When the camera sensor is deformed or dirty
• When the temperature of the camera sensor is extremely high
• When the surrounding brightness level is equal to that of headlights, tail lights or fog
lights
• When headlights or tail lights of vehicles ahead are turned off, dirty, changing color,
or not aimed properly
• When the vehicle is hit by water, snow, dust, etc. from a preceding vehicle
• When driving through an area of intermittently changing brightness and darkness
• When frequently and repeated ly driving ascending/descending roads, or roads with
rough, bumpy or uneven surfaces (such as stone-paved roads, gravel roads, etc.)
• When frequently and repeatedly taking curves or driving on a winding road
• When there is a highly reflective object ahea d of the vehicle, such as a sign or mirror
• When the back of a preceding vehicle is highly reflective, such as a container on a
truck
• When the vehicle's headlights are damaged or dirty, or are not aimed properly
• When the vehicle is listing or titling due to a flat tire, a trailer being towed, etc.
• When the headlights are changed between the high beams and low beams repeat- edly in an abnormal manner
• When the driver believes that the high beams may be flashing or dazzling pedestri-
ans or other drivers
■Temporarily lowering sensor sensitivity
The sensitivity of the sensor can be temporarily lowered.
Turn the engine switch off while the following conditions are met.
• The headlight switch is in or .
• The headlight switch lever is in high beam position.
• Automatic High Beam switch is on.
Turn the engine switch to IGNITION ON mode.
Within 30 seconds after , repeat pulling the he adlight switch lever to the original
position then pushing it to the high beam position quickly 10 times, then leave the lever
in high beam position.
If the sensitivity is changed, the Automatic High Beam indicator is turn on and off 3
times.
Automatic High Beam (head lights) may turn on even the vehicle is stopped.
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2114-3. Operating the lights and wipers
4
Driving
IS350 AWD/IS350/IS300 AWD/IS300_U
Wiper intervals can be adjusted when intermittent operation is selected.
Increases the intermittent windshield
wiper frequency
Decreases the intermittent wind-
shield wiper frequency
The intermittent wind shield wiper oper-
ates more frequently as vehicle speed
becomes higher.
Washer/wiper dual opera-
tion
Pulling the lever op erates the wipers
and washer.
The wipers will automatically operate a
couple of times afte r the washer squirts.
Vehicles with headlight cleaners: When
the engine switch is in IGNITION ON
mode and the headlights are on, if the
lever is pulled, th e headlight cleaners
will operate once. After this, the head-
light cleaners will operate every 5th
time the lever is pulled.
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