2018 LEXUS RC350 check engine

952. Instrument cluster
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Instrument cluster
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
■The meters and display illuminate when
The engine switch is in IGNITION ON mode.
■Instrument panel brightness adjustment
The instrument panel brightness levels when the tail lights are on and off can be adjusted
individually. However, when the surroundings are bright (daytime, etc.), turning on the tail
lights will not change the inst rument panel brightness. At th is time, any adjustments made
to the instrument panel brightness levels will be applied to both settings at once.
■Outside temperature display
●In the following situations, the correct outside temperature may not be displayed, or the
display may take longer than normal to change.
• When stopped, or driving at low speeds (less than 12 mph [20 km/h])
• When the outside temperature has changed suddenly (at the entrance/exit of a garage, tunnel, etc.)
●When “_ _”or “E” is displayed, the system may be malfunctioning.
Take your vehicle to your Lexus dealer.
■Pop-up display
●In some situations, such as when a switch operation is performed, a pop-up display will
be temporarily displayed on the multi-information display or the odometer/trip meter
screen (F SPORT models).
●Some pop-up displays can be set on/off. ( P. 111)
■Customization
The meter display can be customized on the multi-information display. (P. 111)
NOTICE
■To prevent damage to the engine and its components
●Do not let the indicator needle of the tachometer enter the red zone, which indicates
the maximum engine speed.
●The engine may be overheating if the engine coolant temperature gauge is in the red
zone (H). In this case, immediately stop the vehicle in a safe place, and check the
engine after it has cooled completely. ( P. 526)

1022. Instrument cluster
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)
■Instrument panel brightness adjustment
The instrument panel brightness levels when the tail lights are on and off can be adjusted
individually. However, when the surroundings are bright (daytime, etc.), turning on the tail
lights will not change the inst rument panel brightness. At th is time, any adjustments made
to the instrument panel brightness levels will be applied to both settings at once.
■Dimming the analog speedometer lighting
The analog speedometer lighting will be dimm ed when the ambient light is bright, such
as during the daytime, and SPORT S or SPORT S+ mode is selected.
■Outside temperature display
●In the following situations, the correct outside temperature may not be displayed, or the
display may take longer than normal to change.
• When stopped, or driving at low speeds (less than 12 mph [20 km/h])
• When the outside temperature has changed suddenly (at the entrance/exit of a
garage, tunnel, etc.)
●When “ ” or “E” is displayed, the sy stem may be malfunctioning.
Take your vehicle to your Lexus dealer.
■Pop-up display
●In some situations, such as when a switch operation is performed, a pop-up display will
be temporarily displayed on the multi-information display.
●Some pop-up displays can be set on/off. ( P. 129)
■Liquid crystal display
Small spots or light spots may appear on the display. This phenomenon is characteristic
of liquid crystal displays, and there is no problem continuing to use the display.
■Customization
The meter display can be customized on the multi-information display. (P. 129)
NOTICE
■To prevent damage to the engine and its components
●Do not let the indicator of the tachometer enter the red zone, as it represents the
engine speed range which exceeds the maximum safe engine speed.
●In the following situations, th e engine may be overheating. In this case, immediately
stop the vehicle in a safe place, and check the engine after it has cooled completely.
(  P. 526)
• The engine coolant temperature gauge indicator ( ) is in the red zone and flash- ing.
• The engine oil temperature gauge indicator ( ) is in the red zone and flashing.

1533-2. Opening, closing and locking the doors and trunk
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Operation of each component
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
■Trunk light
●The trunk light turns on when the trunk is opened.
●If the trunk light is left on when the engine sw itch is turned off, the light will go off auto-
matically after 20 minutes.
■Function to prevent the trunk being lo cked with the electronic key inside
●When both side doors are locked, closing the trunk lid with the electronic key left inside
the trunk will sound an alarm.
In this case, the trunk lid can be opened by pressing the trunk release button on the
trunk lid.
●If the spare electronic key is put in the trunk with both side doors locked, the key con-
finement prevention function is activated so the trunk can be opened. In order to pre-
vent theft, take all el ectronic keys with you when leaving the vehicle.
●If the electronic key is put in the trunk with both side doors locked, the key may not be
detected depending on the location of the key and the surrounding radio wave condi-
tions. In this case, the key confinement prevention function cannot be activated, causing
the doors to lock when the trunk is closed. Make sure to check where the key is before
closing the trunk.
●The key confinement prevention function cannot be activated if either door is unlocked.
In this case, open the trunk using the trunk opener.
■Internal trunk release lever
■Using the mechanical key
The trunk can be also opened using the mechanical key. ( P. 519)
■If the smart access system with push-button start or the wireless remote control does
not operate properly
Use the mechanical key to unlock the trunk. ( P. 519)
Replace the key battery with a new one if it is depleted. ( P. 427)
■When leaving a key to the vehicle with a parking attendant
P. 142
■Customization
The trunk unlocking operation can be changed. (Customizable features:  P. 569)
The trunk lid can be open
ed by pulling the glow-
in-the-dark lever located on the inside of the
trunk lid upward.
The lever will continue to glow for some time
after the trunk lid is closed.

1593-2. Opening, closing and locking the doors and trunk
3
Operation of each component
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
■Note for the entry function
●Even when the electronic key is within the effective range (detection areas), the system
may not operate properly in the following cases:
• The electronic key is too close to the window or outside door handle, near the ground, or in a high place when the doors are locked or unlocked.
• The electronic key is near the ground or in a high place, or too close to the rear
bumper center when the trunk is opened.
• The electronic key is on th e instrument panel, rear pack age tray or floor, or in the
door pockets or glove box when the engine is started or engine switch modes are
changed.
●Do not leave the electronic key on top of th e instrument panel or near the door pockets
when exiting the vehicle. Depending on the radio wave reception conditions, it may be
detected by the antenna outside the cabin an d the doors will become lockable from the
outside, possibly trapping the electronic key inside the vehicle.
●As long as the electronic key is within th e effective range, the doors may be locked or
unlocked by anyone. However, only the door s detecting the electronic key can be used
to unlock the vehicle.
●Even if the electronic key is not inside the vehicle, it may be possible to start the engine
if the electronic key is near the window.
●The doors may unlock or lock if a large amou nt of water splashes on the door handle,
such as in the rain or in a car wash, when th e electronic key is within the effective range.
(The doors will automatically be locked af ter approximately 60 seconds if the doors
are not opened and closed.)
●If the wireless remote control is used to lo ck the doors when the electronic key is near
the vehicle, there is a possibility that the d oor may not be unlocked by the entry func-
tion. (Use the wireless remote control to unlock the doors.)
●Touching the door lock or unlock sensor while wearing gloves may prevent lock or
unlock operation.
●When the lock operation is performed using the lock sensor, recognition signals will be
shown up to two consecutive times. After this, no recognition signals will be given.
●If the door handle becomes wet while the el ectronic key is within the effective range,
the door may lock and unlock repeatedly. In this case, follow the following correction
procedures to wash the vehicle:
• Place the electronic key in a location 6 ft. (2 m) or more away from the vehicle. (Take care to ensure that the key is not stolen.)
• Set the electronic key to battery-saving mode to disable the smart access system with push-button start. ( P. 158)
●If the electronic key is inside the vehicle and a door handle becomes wet during a car
wash, a message may be shown on the mult i-information display and a buzzer will
sound outside the vehicle. To turn of f the alarm, lock both side doors.
●The lock sensor may not work properly if it comes into contact with ice, snow, mud, etc.
Clean the lock sensor and attempt to operate it again.
●A sudden handle operation or a handle operation immediately after entering the effec-
tive range may prevent the doors from bein g unlocked. Touch the door unlock sensor
and check that the doors are unlocked before pulling the door handle again.
●Unlocking the vehicle may take more time if another electronic key is within the effec-
tive range.

1673-3. Adjusting the seats
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Operation of each component
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
Your preferred driving position (the posi tion of the driver's seat, steering wheel
and outside rear view mirrors) can be recorded and recalled by pressing a but-
ton.
Three different driving positions can be recorded into memory.
■Recording procedure
Check that the shift lever is in P.
Turn the engine switch to IGNITION ON mode.
Adjust the driver’s seat, steering wheel, and outside rear view mirrors to the
desired positions.
While pressing the “SET” button,
or within 3 seconds after the
“SET” button is pressed, press
button “1”, “2” or “3” until the
buzzer sounds.
If the selected button has already
been preset, the previously recorded
position will be overwritten.
■Recall procedureCheck that the shift lever is in P.
Turn the engine switch to IGNITION ON mode.
Press one of the buttons for the
driving position you want to recall
until the buzzer sounds.
Driving position memory (if equipped)
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1693-3. Adjusting the seats
3
Operation of each component
RC350_RC300 AWD_RC300_RC F_U(OM24748U)
Each electronic key (including a card key) can be registered to recall your pre-
ferred driving position.
■Registering procedure
Record your driving position to button “1”, “2” or “3” before performing the
following:
Carry only the key you want to regist er, and then close the driver’s door.
If 2 or more keys are in the vehicle, the driving position cannot be recorded
properly.
Check that the shift lever is in P.
Turn the engine switch to IGNITION ON mode.
Recall the driving position that you want to record.
While pressing the recalled but-
ton, press and hold the door lock
switch (either lock or unlock) until
the buzzer sounds.
If the button could not be registered,
the buzzer sounds continuously for
approximately 3 seconds.
■Recall procedureMake sure that the doors are locked before recalling the driving position.
Carry the electronic key that has been registered to the driving position,
and then unlock and open the driver’s door using the smart access system
with push-button start or wireless remote control.
The driving position will move to the recorded position (not including the steering
wheel). However, the seat will move to a position slightly behind the recorded posi-
tion in order to make entering the vehicle easier.
If the driving position is in a position th at has already been recorded, the seat and
outside rear view mirrors will not move.
Turn the engine switch to ACCESS ORY mode or IGNITION ON mode,
or fasten a seat belt.
The seat and steering wheel will move to the recorded position.
Memory recall function (if equipped)
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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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