steering LEXUS RCF 2018 Manual Online

466 7-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) Indicates that steering control function is temporarily
canceled due to the LDA (Lane Departure Alert with
steering control) system determining that the driver
does not have the hands on the steering wheel while the
steering control function is on
If the driver operates the steering wheel only a small
amount, the system may be unable to detect the steer-
ing wheel operations and this warning may be dis-
played.
 Firmly hold the steering wheel.
Indicates an engine malfunction
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates an engine malfunction
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates an engine malfunction
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.Warning message Details/Actions(U.S.A.) (Canada)
(U.S.A.) (Canada)

4697-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) 7
When trouble arises Indicates a malfunction in the smart access system with
push-button start
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer. (If equipped)
Indicates that a Blind Spot Monitor sensor or the sur-
rounding area on the bumper is dirty or covered with ice
A buzzer also sounds.
 Clean off the dirt, snow, ice, etc. and drive the vehi-
cle with the operation conditions of the BSM func-
tion (  P. 295) satisfied for approximately 10
minutes. If the warning me ssage does not disappear,
the sensor may be misaligned. Have the vehicle
inspected by your Lexus dealer.
Indicates a malfunction in the dynamic radar cruise con-
trol system
Press the “ON/OFF” button once to deactivate the
system, and then press the button again to reactivate
the system.
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates a malfunction in the LDA (Lane Departure
Alert with steering control) system
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.Warning message Details/Actions

470 7-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) The operation conditions of the camera sensor are not
met.
The following systems may be suspended until the
problem shown in the message is resolved.
• PCS (Pre-Collision System)
• LDA (Lane Departure Alert with steering control)
• Dynamic radar cruise control
•Automatic High Beam
 P. 260
Indicates that the system is temporarily unavailable due
to a malfunction in a sensor other than the camera sen-
sor
A buzzer also sounds.
 Turn the LDA (Lane Departure Alert with steering
control) system off, wait for a little while, and then
turn the LDA (Lane Depart ure Alert with steering
control) system back on.Warning message Details/Actions

472 7-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) Indicates that the automatic transmission fluid tempera-
ture is too high
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer. (If equipped)
Indicates a malfunction in the VGRS (Variable Gear
Ratio Steering) system
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer. (If equipped)
Indicates that the active re ar wing switch was pressed
when the active rear wing was disabled
 Enable the active rear wing (  P. 130) then press
the active rear wing switch. (AWD models)
Indicates a malfunctio n in the AWD system
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates that LDA (Lane Departure Alert with steering
control) system cannot be used due to the vehicle speed
being too high
 Slow down.Warning message Details/Actions

4737-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) 7
When trouble arises Indicates that the LDA (Lane Departure Alert with steer-
ing control) system cannot be used as the vehicle speed
is approximately 32 mph (50 km/h) or less
 Drive the vehicle at approximately 32 mph (50 km/h)
or more.
Indicates that the engine was stopped while driving
A buzzer also sounds.
 Operate the steering wheel with more force than
usual.
Indicates that the engine switch is turned off or turned to
ACCESSORY mode and the driver’s door is opened
while the lights are turned on
A buzzer also sounds.
 Turn the lights off. (If equipped)
Indicates that the moon roof is not fully closed (with the
engine switch off, and the driver’s door open)
A buzzer also sounds.
 Close the moon roof.
Indicates that the windows are not fully closed (with the
engine switch off, and the driver’s door open)
A buzzer also sounds.
 Close all the windows.Warning message Details/Actions
(Flashes)
(Flashes)
(Flashes)

482 7-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)■
Warning messages
The warning message illustrations used are intended as examples, and may differ from
the image that is actually displaye d on the multi-information display.■
Warning message in radar cruise mode
In the following cases, the wa rning message may not be displa yed even if vehicle-to-vehi-
cle distance decreases: ●
When your vehicle and the vehicle ahead ar e traveling at the same speed or the vehi-
cle ahead is traveling more quickly than your vehicle●
When the vehicle ahead is traveling at a very low speed ●
Immediately after cruise control speed is set ●
At the instant the accelerator pedal is depressed ■
The LDA (Lane Departure Alert with steering control) lane departure warning func-
tion
In the following situations, th e warning message will not be displayed even if a lane line is
crossed. ●
When the vehicle speed deviates from the operating range of the LDA system func-
tions (  P. 266)●
When the lane lines cannot be recognized (  P. 267)■
Resetting the message indicating ma intenance is required (if equipped)
Make sure to reset the oil change system. (  P. 385, 403)■
Conditions that the tire pressure wa rning system may not function properly
 P. 417 ■
Warning buzzer
 P. 457

4857-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) 7
When trouble arises  Con-
tinuous An attempt was made to lock the
doors using the smart access system
with push-button start while the
electronic key was still inside the
vehicle.
 Retrieve the electronic key
from the vehicle and lock the
doors again.
Once Con-
tinuous An attempt was made to lock either
front door by opening a door and
putting the inside lock button into
the lock position, then closing the
door with the electronic key still
inside the vehicle.
 Retrieve the electronic key
from the vehicle and lock the
doors again.
Once  The electronic key has a low battery.
 Replace the electronic key bat-
tery. (  P. 427)
Once  The steering lock could not be
released within 3 seconds of the
engine switch being pressed.
 Press the engine switch while
depressing the brake pedal and
moving the steering wheel left
and right.Interior
buzzer Exterior
buzzer Warning message Details/Actions
(Flashes)

5017-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) 7
When trouble arises WARNING ■
When using the spare tire ●
Remember that the spare tire provided is specifically designed for use with your vehi-
cle. Do not use your spare tire on another vehicle. ●
Do not use more than one spare tires simultaneously. ●
Replace the spare tire with a stan dard tire as soon as possible.●
Avoid sudden acceleration, abrupt steering, sudden braking and shifting operations
that cause sudden engine braking. ■
When the spare tire is attached
The vehicle speed may not be correctly detected, and the following systems may not
operate correctly:
Also, not only can the following system not be utilized fully, but it may even negatively
affect the drive-train components:
• AWD system (if equipped) ■
Speed limit when using the spare tire
Do not drive at speeds in excess of 50 mp h (80 km/h) when a spar e tire is installed on
the vehicle.
The spare tire is not designed for driving at high speeds. Fa ilure to observe this precau-
tion may lead to an accident causing death or serious injury. ■
After using the tools and jack
Before driving, make sure all the tools and jack are securely in place in their storage
location to reduce the possibilit y of personal injury during a collision or sudden brak-
ing.
NOTICE ■
Driving with tire chains and the spare tire
Do not fit tire chains to the spare tire.
Tire chains may damage the vehicle body and adversely affect driving performance.■
When replacing the tires
When removing or fitting the wheels, tires or the tire pressure warning valve and trans-
mitter, contact your Lexus dealer as the tire pressure warning valve and transmitter
may be damaged if not handled correctly.• ABS & Brake assist
•VSC
•TRAC
• Dynamic radar cruise control
•PCS
•EPS
• Adaptive Variable Suspension System
(if equipped)
• LDA (Lane Departure Alert with
steering control)
• VGRS (if equipped) • LDH (Lexus Dynamic Handling sys-
tem) (if equipped)
• DRS (Dynamic Rear Steering) (if
equipped)
• VDIM (Vehicle Dynamics Integrated
Management)
• Tire pressure warning system
• Lexus parking assist monitor
• Intuitive parking assist (if equipped)
• Navigation system (if equipped)

514 7-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)WARNING ■
When fixing the flat tire
Observe the following precautions.
Failure to do so may result in death or serious injury.●
Stop your vehicle in a safe and flat area. ●
Do not touch the wheels or the area around the brakes immediately after the vehicle
has been driven.
After the vehicle has been driven, the wheels and the area around the brakes may be
extremely hot. Touching these areas with hands, feet or other body parts may result in
burns. ●
Connect the valve and hose securely with the tire installed on the vehicle.
• If the hose is not properly connected to the valve, air leakage may occur or sealant
may be sprayed out.
• If the hose comes off the valve while inflating the tire, there is a risk that the hose
will move abruptly due to air pressure.
• After inflation of the tire has completed, the sealant may splatter when the hose is
disconnected or some air is let out of the tire. ●
Follow the operation procedure to repair the tire. If the procedure is not followed, the
sealant may spray out. ●
Keep back from the tire while it is being re paired, as there is a chance of it bursting
while the repair operation is being performed. If you notice any cracks or deforma-
tion of the tire, turn off the compressor sw itch and stop the repa ir operation immedi-
ately. ●
The kit may overheat if operated for a long period of time. Do not operate the com-
pressor continuously for more than 35 minutes. ●
Parts of the kit become hot during operation. Be careful handling the kit during and
after operation. Do not touch the metal part around the connecting area between the
bottle and compressor. It will be extremely hot. ●
Do not attach the vehicle speed warning sticker to an area other than the one indi-
cated. If the sticker is attached to an area where an SRS airbag is located, such as the
pad of the steering wheel, it may preven t the SRS airbag from operating properly.■
Driving to spread th e liquid sealant evenly●
Drive the vehicle carefully at a low speed. Be especially careful when turning and cor-
nering. ●
If the vehicle does not drive straight or you feel a pull through the steering wheel, stop
the vehicle and check the following:
• Tire condition. The tire may have separated from the wheel.
• Tire inflation pressure. If tire inflation pressure is 19 psi (130 kPa, 1.3 kgf/cm 2
or
bar) or below, this may in dicate severe tire damage.

5177-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) 7
When trouble arises One of the following may be the cause of the problem: ●
One or both of the battery terminals may be disconnected. ●
The battery may be discharged. (  P. 522)●
There may be a malfunction in the steering lock system.Contact your Lexus dealer if the problem cannot be repaired, or if repair procedures
are unknown.
When the engine does not start, the follo wing steps can be used as an interim
measure to start the engine if the engine switch is functioning normally:
Set the parking brake.
Shift the shift lever to P.
Turn the engine switch to ACCESSORY mode.
Press and hold the engine switch for about 15 seconds while depressing the
brake pedal firmly.
Even if the engine can be started using the above steps, the system may be mal-
functioning. Have the vehicle in spected by your Lexus dealer.The starter motor does not turn ove r, the interior lights and headlights
do not turn on, or the horn does not sound.
Emergency start function 1
2
3
4