engine Lexus IS300 2018 / LEXUS 2018 IS300,IS350 (OM53E34U) Repair Manual

178
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
4-2. Driving procedures
Check that the parking brake is set.
Check that the shift lever is in P.
Firmly depress the brake pedal.
and a message will be
displayed on the multi-information display.
If it is not displayed, th e engine cannot be started.
Press the engine switch shortly and
firmly.
When operating the engine switch, one
short, firm press is enough. It is not nec-
essary to press and hold the switch.
The engine will crank until it starts or for
up to 30 seconds, whichever is less.
Continue depressing the brake pedal
until the engine is completely started.
The engine can be started from any
engine switch mode.
Stop the vehicle.
Set the parking brake ( →P. 192), and shift the shift lever to P.
Press the engine switch.
Release the brake pedal and check that the display on the meters is off.
Engine (ignition) switch
Performing the following operations wh en carrying the electronic key on your
person starts the engine or changes engine switch modes.
Starting the engine
1
2
3
4
Stopping the engine
1
2
3
4

1794-2. Driving procedures
4
Driving
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Modes can be changed by pressing the en gine switch with brake pedal released.
(The mode changes each time the switch is pressed.)
Off
*
The emergency flashers can be used.
The multi-information display will not be
displayed.
ACCESSORY mode
Some electrical components such as the
audio system can be used.
“ACCESSORY” will be displayed on the
meters.
IGNITION ON mode
All electrical components can be used.
“IGNITION ON” will be displayed on
the meters.
*: If the shift le ver is in a position other than
P when turning off the engine, the
engine switch will be turned to ACCES-
SORY mode, not to off.
If the engine is stopped with the shift lever in a position other than P, the engine
switch will not be turned off but inst ead be turned to ACCESSORY mode. Per-
form the following procedure to turn the switch off:
Check that the parking brake is set.
Shift the shift lever to P.
Check that “Turn Off Vehicle” is disp layed on the multi-information display
and then press the engine switch once.
Check that “Turn Off Vehicle” on th e multi-information display is off.
Changing engine switch modes
1
2
3
When stopping the engine with the shift lever in a position other than P
1
2
3
4

1804-2. Driving procedures
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
■Auto power off function
If the vehicle is left in ACCESSORY mode for more than 20 minutes or IGNITION ON
mode (the engine is not running) for more than an hour with the shift lever in P, the engine
switch will automatically turn off. However, this function cannot entirely prevent battery
discharge. Do not leave the vehicle with the engine switch in ACCESSORY or IGNI-
TION ON mode for long periods of ti me when the engine is not running.
■Electronic key battery depletion
→P. 113
■Conditions affe cting operation
→ P. 129
■Notes for the entry function
→P. 130
■If the engine does not start
●Check that the shift lever is se curely set in P. The engine may not start if the shift lever is
displaced out of P.
●The engine immobilizer system ma y not have been deactivated. (→P. 68)
Contact your Lexus dealer.
■Steering lock
After turning the engine switch off and opening and closing the doors, the steering wheel
will be locked due to the steering lock func tion. Operating the engine switch again auto-
matically cancels the steering lock.
■When the steering lock cannot be released
■Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, operation of the motor may be sus-
pended if the engine is turned on and off repeat edly in a short period of time. In this case,
refrain from operating the engine switch. After about 10 seconds, the steering lock
motor will resume functioning. “Steering Wheel Lock Press Engine Switch
while Turning Wheel” w ill be displayed on the
multi-information display.
Check that the shift leve r is in P. Press the
engine switch while turn ing the steering wheel
left and right.

1814-2. Driving procedures
4
Driving
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
■When “Access System with Elec. Key Malf unction See Owner’s Manual” is displayed
on the multi-information display
The system may be malfunctio ning. Have the vehicle inspected by your Lexus dealer
immediately.
■If the electronic key battery is depleted
→ P. 500
■Operation of the engine switch
●If the switch is not pressed shortly and firmly, the engine switch mode may not change
or the engine may not start.
●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 access system wi th push-button start has been deactivated by a customized
setting
→ P. 569
WARNING
■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 resu lting 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, re sulting 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. 513)
However, do not touch the engi ne switch while driving except in an emergency. Turning
the engine off while driving will not cause lo ss of steering or braking control, but the
power assist to these systems will be lost. Th is 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.

1824-2. Driving procedures
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
NOTICE
■To prevent battery discharge
●Do not leave the engine switch in AC CESSORY or IGNITION ON mode for long
periods of time without the engine running.
●If “ACCESSORY” or “IGNITION ON” is displa yed on the meters while the engine is
not running, the engine switch is not off. Exit the vehicle after turning the engine
switch off.
●Do not stop the engine when the shift lever is in a position other than P. If the engine is
stopped in another shift lever position, the engine switch will not be turned off but
instead be turned to ACCESSORY mode. If the vehicle is left in ACCESSORY
mode, battery discharge may occur.
■When starting the engine
●Do not race a cold engine.
●If the engine becomes difficult to start or stalls frequently, have your vehicle checked
by your Lexus dealer immediately.
■Symptoms indicating a malfun ction with the engine switch
If the engine switch seems to be operating somewhat differen tly than usual, such as the
switch sticking slightly, ther e may be a malfunction. Contact your Lexus dealer immedi-
ately.

1834-2. Driving procedures
4
Driving
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
While the engine switch is in IGNITION ON mode, move the shift lever
with the brake pedal depressed.
When shifting the shift lever between P and D, make sure that the vehicle is com-
pletely stopped.
Automatic transmission
Shifting the shift lever

1844-2. Driving procedures
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
*1: To improve fuel efficiency and reduce noise, shift the shift lever to D for normal driv-
ing.
*2: Any gear range can be fixed when driving in M mode.
■Sport mode/Eco drive mode
→ P. 288
■Snow mode
Snow mode can be selected to suit th e conditions when driving on slippery
road surfaces, such as snow.
Press the switch.
Press the switch again to return to
normal mode.
Shift position purpose
Shift positionObjective or function
PParking the vehicle/starting the engine
RReversing
NNeutral
(Condition in which the power is not transmitted)
DNormal driving*1
MM mode driving*2 ( → P. 186)
Selecting the driving mode

1854-2. Driving procedures
4
Driving
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
To drive using temporary shift range selection, operate the “-” or “+” paddle shift
switch.
When the “-” paddle shift switch is oper ated, the shift range will be downshifted
to a range that enables engine braking forc e that is suitable to driving conditions.
When the “+” paddle shift switch is operated, the shift range will be one gear
higher than the gear in use during normal D position driving.
Changing the shift range allows restrictio n of the highest gear, preventing unnec-
essary upshifting and enabling the level of engine braking force to be selected.
Upshifting
Downshifting
8-speed models: Th e selected shift
range, from D1 to D8, will be displayed
in the meter.
6-speed models: The selected shift
range, from D1 to D6, will be displayed
in the meter.
To return to normal D position driving,
the “+” paddle shift switch must be held
down for a period of time.
■Shift ranges and their functions
A lower shift range will provide greater engine braking forces than a higher shift
range.
Selecting shift ranges in the D position
1
2
Meter displayFunction
D2 - D8
(8-speed models)A gear in the range between 1 and the selected gear is auto- matically chosen depending on vehicle speed and driving conditions
D2 - D6
(6-speed models)
D11st gear is set

1864-2. Driving procedures
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
To enter M mode, shift the shift lever to M. Gears can then be selected by oper-
ating the shift lever or paddle shift switch es, 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.
8-speed models: Th e selected gear,
from M1 to M8, will be fixed and dis-
played in the meter.
6-speed models: The selected gear,
from M1 to M6, will be fixed and dis-
played 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 positi on, 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 no t shift even if the shift lever or paddle
shift switches are operated.
●“Slippery Road. Cannot Shift to Lowe r Gear” is displayed on the multi
information display.
●The vehicle speed is low (upshift only).
Selecting gears in the M position
1
2

1874-2. Driving procedures
4
Driving
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
■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. 239)
●6-speed models: While driving in the D position, downshifting to 5 or 4.
(→ P. 239)
●When switching the driving mode to sport mode while driving in D position.
(→ P. 288)
■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. 534)
• When the accelerator pedal is depressed t oo much while the vehicle is in reverse.