engine LEXUS RC350 2018 Repair Manual

1843-5. Opening, closing the windows and moon roof
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)
■Door lock linked window operation
●The power windows can be opened an d closed using the mechanical key.*( P. 519)
●The power windows can be opened using the wireless remote control.* ( P. 145)
*: These settings must be cust omized at your Lexus dealer.
■When the battery is disconnected
The window lock switch is disabled. If nece ssary, press the window lock switch after
reconnecting the battery.
■Power windows open warning buzzer
The buzzer sounds and a message is shown on the multi-information display in the instru-
ment cluster when the engine switch is turned off and the driver’s door is opened with the
power windows open.
■Customization
Settings (e.g. linked door lock operation) can be changed.
(Customizable features: P. 569)

1853-5. Opening, closing the windows and moon roof
3
Operation of each component
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■Closing the windows
●The driver is responsible for all the power window operations, including the operation
for the passengers. In order to prevent acci dental operation, especially by a child, do
not let a child operate the power windows. It is possible for children and other passen-
gers to have body parts caught in the powe r window. Also, when riding with a child, it
is recommended to use the window lock switch. ( P. 182)
●Check to make sure that all passengers do not have any part of their body in a posi-
tion where it could be caught wh en a window is being operated.
●When using the wireless remote control or mechanical key and operating the power
windows, operate the power window after checking to make sure that there is no pos-
sibility of any passenger having any of their body parts caught in the window. Also do
not let a child operate window by the wirele ss remote control or mechanical key. It is
possible for children and other passengers to get caught in the power window.
●When exiting the vehicle, turn the engine sw itch off, carry the key and exit the vehicle
along with the child. There may be accidental operation, due to mischief, etc., that
may possibly lead to an accident.
■Jam protection function
●Never use any part of your body to intentionally activate the jam protection function.
●The jam protection function may not work if something gets jammed just before the
window is fully closed. Be careful not to get any part of your body jammed in the win-
dow.
■Catch protection function
●Never use any part of your body or clothing to intentionally activate the catch protec-
tion function.
●The catch protection function may not work if something gets caught just before the
window is fully opened. Be ca reful not to get any part of your body or clothing caught
in the window.

1873-5. Opening, closing the windows and moon roof
3
Operation of each component
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
■The moon roof can be operated when
The engine switch is in IGNITION ON mode.
■Operating the moon roof after turning the engine off
The moon roof can be operated for approximat ely 45 seconds after the engine switch is
turned to ACCESSORY mode or turned off. It cannot, however, be operated once either
door is opened.
■Jam protection function
If an object is detected between the moon r oof and the frame while the moon roof is clos-
ing or tilting down, travel is stopped and the moon roof opens slightly.
■Sunshade
The sunshade can be opened and closed manually. However, the sunshade will open
automatically when the moon roof is opened.
■Door lock linked moon roof operation
●The moon roof can be opened and closed using the mechanical key.* ( P. 519)
●The moon roof can be opened us ing the wireless remote control.* ( P. 145)
*: These settings must be cust omized at your Lexus dealer.
■If the moon roof does not close normally
Perform the following procedure:
Stop the vehicle.
Press and hold the “CLOSE” switch.
*
The moon roof will close, reopen and pause for approximately 10 seconds. Then it will
close again and stop at the completely closed position.
Check to make sure that the moon roof is completely closed and then release the
switch.
*: If the switch is released at the incorrect time, the procedure will have to be performed
again from the beginning.
If the moon roof does not fully close even after performing the above procedure cor-
rectly, have the vehicle inspected by your Lexus dealer.
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1883-5. Opening, closing the windows and moon roof
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)
■If the moon roof does not move normally
If the moon roof does not open or close no rmally or the automatic opening function does
not operate, perform the follo wing initialization procedure.
Turn the engine switch to IGNITION ON mode.
Operate the moon roof.
Depending on the kind of malfunction perform either of the following:
If the moon roof does not open wh en the “OPEN” switch is pressed
Press and hold the “DOWN” switch or “CLO SE” switch until the moon roof is com-
pletely closed.
The moon roof will open and close a fe w times before it closes completely.
Confirm that the moon roof has comple tely stopped and release the switch.
If the moon roof does not open completely automatically even though it tilts up and
opens while the “OPEN” switch is being pressed and held
Press and hold the “OPEN” switch until the moon roof opens completely.
Press and hold the “CLOSE” switch unti l the moon roof closes completely.
Press and hold the “UP” switch unti l the moon roof tilts up and stops.
Press and hold the “DOWN” switch until th e moon roof tilts down and stops at the
completely closed position.
If you release the switch while the moon roof is moving, perform the procedure again
from the beginning.
If, after performing the above procedures corr ectly, the moon roof still does not open or
close normally or the automatic opening function does not operate, have the vehicle
inspected by your Lexus dealer.
■Moon roof open warning buzzer
The buzzer sounds and a message is shown on the multi-information display in the instru-
ment cluster when the engine switch is turned off and the driver’s door is opened with the
moon roof open.
■Customization
Settings (e.g. linked door lock operation) can be changed.
(Customizable features: P. 569)
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1893-5. Opening, closing the windows and moon roof
3
Operation of each component
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
WARNING
Observe the following precautions.
Failure to do so may cause death or serious injury.
■Opening the moon roof
●Do not allow any passengers to put their hands or heads outside the vehicle while it is
moving.
●Do not sit on top of the moon roof.
■Closing the moon roof
●The driver is responsible for moon roof opening and closing operations.
In order to prevent accidental operation, especially by a child, do not let a child oper-
ate the moon roof. It is possible for child ren and other passengers to have body parts
caught in the moon roof.
●Check to make sure that all passengers do not have any part of their body in a posi-
tion where it could be caught when the moon roof is being operated.
●When using the wireless remote control or mechanical key and operating the moon
roof, operate the moon roof after checking to make sure that there is no possibility of
any passenger having any of their body part s caught in the moon roof. Also, do not let
a child operate moon roof by the wireless remote control or mechanical key. It is pos-
sible for children and ot her passengers to get caught in the moon roof.
●When exiting the vehicle, turn the engine sw itch off, carry the key and exit the vehicle
along with the child. There may be accidental operation, due to mischief, etc., that
may possibly lead to an accident.
■Jam protection function
●Never use any part of your body to intentionally activate the jam protection function.
●The jam protection function may not work if something gets caught just before the
moon roof is fully closed. Also, the jam prot ection function is not designed to operate
while the moon roof switch is being pressed. Take care so that your fingers, etc. do not
get caught.
NOTICE
■To prevent damage to the moon roof
●Before opening, make sure that there are no foreign objects such as stones or ice
around the opening.
●Do not hit the face or edge of the moon roof with hard objects.
■Operating the moon roof
There is the possibility that water or rain will get into the vehicle if you operate the
moon roof after a rainfall, snowfall or car wash. Wipe the moon roof dry with a cloth
before operating it.

191
Driving4
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
4-1. Before driving
Driving the vehicle ...................... 192
Cargo and luggage .................... 201
Vehicle load limits ......................204
Trailer towing .............................. 205
Dinghy towing ............................ 206
4-2. Driving procedures Engine (ignition) switch ...........207
Automatic transmission............ 213
Turn signal lever........................... 221
Parking brake .............................. 222
ASC (Active Sound Control)
(RC350/RC300) .................223
ASC (Active Sound Control)
(RC F)........................................... 224
4-3. Operating the lights and wipers
Headlight switch .........................225
Automatic High Beam .............228
Fog light switch ...........................232
Windshield wipers and washer..........................................233 4-4. Refueling
Opening the fuel tank cap .......241
4-5. Using the driving support systems
Lexus Safety System+ .............. 245
PCS (Pre-Collision System) .........250
LDA (Lane Departure Alert
with steering control) ..............261
Dynamic radar cruise control ......................................... 268
Intuitive parking assist ..............280
BSM (Blind Spot Moni tor)..............290
• BSM function ......................... 293
• RCTA function...................... 297
Driving mode select switch ............................................ 301
Active rear wing ......................... 307
TVD (Torque Vectoring
Differential) ................................. 310
Driving assist systems ............... 312
4-6. Driving tips Winter driving tips .....................320

192
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
4-1. Before driving

P. 207
With the brake pedal depressed, shift the shift lever to D. ( P. 213)
Release the parking brake. ( P. 222)
Gradually release the brake pedal and gently depress the accelerator pedal
to accelerate the vehicle.
With the shift lever in D, depress the brake pedal.
If necessary, set the parking brake.
If the vehicle is to be stopped for an extended period of time, shift the shift lever to P or
N. ( P. 213)
With the shift lever in D, depress the brake pedal.
Set the parking brake ( P. 222), and shift the shift lever to P ( P. 213).
Press the engine switch to stop the engine.
Lock the door, making sure that you ha ve the electronic key on your person.
If parking on a hill, block the wheels as needed.
Make sure that the parking brake is set and shift the shift lever to D.
Gently depress the accelerator pedal.
Release the parking brake.
Driving the vehicle
The following procedures should be observed to ensure safe driving:
Starting the engine
Driving
Stopping
Parking the vehicle
Starting off on a steep uphill
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1934-1. Before driving
4
Driving
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
■When starting off on an uphill
The hill-start assist control will activate. ( P. 312)
■Driving in the rain
●Drive carefully when it is ra ining, because visibility will be reduced, the windows may
become fogged-up, and the road will be slippery.
●Drive carefully when it starts to rain, beca use the road surface will be especially slip-
pery.
●Refrain from high speeds when driving on an expressway in the rain, because there may
be a layer of water between the tires and th e road surface, preventing the steering and
brakes from operating properly.
■Engine speed while driving
In the following conditions, th e engine speed may become high while driving. This is due
to automatic up-shifting control or down-shi fting implementation to meet driving condi-
tions. It does not indica te sudden acceleration.
●The vehicle is judged to be driving uphill or downhill
●When the accelerator pedal is released
●When the brake pedal is depressed while sport mode is selected
■Restraining the engine output (Brake Override System)
●When the accelerator and brake pedals are depressed at the same time, the engine
output may be restrained.
●A warning message is displayed on the mult i-information display while the system is
operating. ( P. 477)
■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. 465)
• When the accelerator pedal is depressed t oo much while the vehicle is in reverse.
●While Drive-Start Control is being activated, your vehicle may have trouble escaping
from the mud or fresh snow. In such case, deactivate TRC ( P. 314) to cancel Drive-
Start Control so that the vehicle may beco me able to escape from the mud or fresh
snow.
■Breaking in your new Lexus
To extend the life of the vehicle, observin g the following precautions is recommended:
●For the first 186 miles (300 km):
Avoid sudden stops.
●For the first 621 miles (1000 km):
• Do not drive at extremely high speeds.
• Avoid sudden acceleration.
• Do not drive continuously in low gears.
• Do not drive at a constant speed for extended periods.

1944-1. Before driving
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)
■Drum-in-disc type parking brake system
Your vehicle has a drum-in-disc type parking brake system. This type of brake system
needs bedding-down of the brake shoes peri odically or whenever the parking brake
shoes and/or drum are replaced. Have your Lexus dealer perform the bedding down
operation.
■Operating your vehicle in a foreign country
Comply with the relevant vehicle registration laws and confirm the availability of the cor-
rect fuel. ( P. 554)
■Brake pads and discs (RC F)
The brake pads and discs are designed for use under high load conditions. Therefore,
brake noise may be generated depending on the vehicle speed, braking force and vehi-
cle environment (temperature, humidity, etc.).
■Idling time before engine stop (RC300)
To prevent damage to the turbocharger, allow the engine to idle immediately after high-
load driving.
Driving conditionIdling time
Normal city driving or high-spe ed driving (at the highway speed
limit or recommended speed)
Not necessary
Steep hill driving, co ntinuous driving (race track driving etc.)
Approximately
1 minute

1954-1. Before driving
4
Driving
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When starting the vehicle
Always keep your foot on the brake pedal while stopped with the engine running. This
prevents the vehicle from creeping.
■When driving the vehicle
●Do not drive if you are unfamiliar with the location of the brake and accelerator ped-
als to avoid depressing the wrong pedal.
• Accidentally depressing the accelerator pedal instead of the brake pedal will
result in sudden acceleration that may lead to an accident.
• When backing up, you may twist your body around, leading to a difficulty in oper-
ating the pedals. Make sure to operate the pedals properly.
• Make sure to keep a correct driving po sture even when moving the vehicle only
slightly. This allows you to depress th e brake and accelerator pedals properly.
• Depress the brake pedal using your right foot. Depressing the brake pedal using your left foot may delay re sponse in an emergency, resulting in an accident.
●Do not drive the vehicle over or stop the vehicle near flammable materials.
The exhaust system and exhaust gases can be extremely hot. These hot parts may
cause a fire if there is any flammable material nearby.
●During normal driving, do not turn off the engine. 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.
However, in the event of an emergency, such as if it becomes impossible to stop the
vehicle in the normal way: P. 443
●Use engine braking (downshift) to maintain a safe speed when driving down a steep
hill.
Using the brakes continuously may cause th e brakes to overheat and lose effective-
ness. ( P. 213)
●Do not adjust the positions of the steering wheel, the seat, or the inside or outside rear
view mirrors while driving.
Doing so may result in a loss of vehicle control.
●Always check that all passengers’ arms, heads or other parts of their body are not
outside the vehicle.
●Do not drive in excess of the speed limit. Even if the legal speed limit permits it, do not
drive over 85 mph (140 km/h) unless your vehicle has high-speed capability tires.
Driving over 85 mph (140 km/h ) may result in tire failure, loss of control and possible
injury. Be sure to consult a tire dealer to determine whether the tires on your vehicle
are high-speed capability tires or no t before driving at such speeds.