brake LEXUS RC300H 2017 Repair Manual

5448-2. Steps to take in an emergency
RC300h_EE(OM24740E)
Indicates that: • The brake fluid level is low; or
• The brake system is malfunctioning A buzzer also sounds. Immediately stop the vehicle in a safe place and
contact any authorized Lexus dealer or repairer, or another duly qualified and equipped professional.Continuing to drive the vehicle may be dangerous.
Indicates a malfunction in the hybrid system A buzzer also sounds. Immediately stop the vehicle in a safe place and
contact any authorized Lexus dealer or repairer, or another duly qualified and equipped professional.
Indicates that one or more of the doors is not fully closed The system also indicates which doors are not fullyclosed.
If the vehicle reaches a speed of 5 km/h (3 mph),
flashes and a buzzer sounds to indicate that
the door(s) are not yet fully closed.
 Make sure that both side doors are closed.
Indicates that the hood is not fully closed
If the vehicle reaches a speed of 5 km/h (3 mph),
flashes and a buzzer sounds to indicate that
the hood is not yet fully closed.
 Close the hood.
Indicates that the trunk is not fully closed If the vehicle reaches a speed of 5 km/h (3 mph),
flashes and a buzzer sounds to indicate that
the trunk is not yet fully closed.
 Close the trunk.
Warning messageDetails/Actions
(Flashes)

5458-2. Steps to take in an emergency
8
When trouble arises
RC300h_EE(OM24740E)
Indicates a malfunction in the Lexus parking assist-sen-
sor A buzzer also sounds. Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
Indicates that a Lexus parking assist-sensor is dirty or
covered with ice A buzzer also sounds. Clean the sensor.
Indicates that the accelerator pedal is depressed while the shift position is in NA buzzer also sounds.
 Release the accelerator pedal and shift the shift lever to D, S or R.
Indicates that the accelerator pedal is depressed to stopthe vehicle on an upward slope, etc.
A buzzer also sounds.  Release the accelerator pedal and depress the brake pedal.
Warning messageDetails/Actions
(Flashes)
(Flashes)

5478-2. Steps to take in an emergency
8
When trouble arises
RC300h_EE(OM24740E)
Indicates that the vehicle is being driven at 5 km/h (3 mph) or more with the parking brake still engaged
A buzzer also sounds.  Release the parking brake.
Indicates a malfunction in: • The SRS airbag system; or• The seat belt pretensioner system
A buzzer also sounds.  Have the vehicle inspected by any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
Indicates a malfunction in: •The ABS; or• The brake assist system
A buzzer also sounds.  Have the vehicle inspected by any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
Indicates that the engine coolant temperature is too high
A buzzer also sounds.  P. 587
(If equipped)
Indicates that the radar sensor is dirty or covered with ice
A buzzer also sounds.  Clean the sensor.
Warning messageDetails/Actions
(Flashes)

5498-2. Steps to take in an emergency
8
When trouble arises
RC300h_EE(OM24740E)
(If equipped)
Indicates a malfunction in the LDA (Lane Departure
Alert) system A buzzer also sounds. Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
(If equipped)
Indicates a malfunction in the PCS (Pre-Crash Safetysystem)A buzzer also sounds.
 Have the vehicle inspected by any authorized Lexus dealer or repairer, or another duly qualified andequipped professional immediately.
(If equipped)
Indicates a malfunction in the BSM (Blind Spot Monitor)
system A buzzer also sounds. Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
Indicates abnormal engine oil pressure
A buzzer also sounds.  Immediately stop the vehicle in a safe place and contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
Indicates a malfunction in: • The regenerative brake system; or• The electronically controlled brake system
A buzzer also sounds.  Immediately stop the vehicle in a safe place and contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
Warning messageDetails/Actions
(Flashes)

5518-2. Steps to take in an emergency
8
When trouble arises
RC300h_EE(OM24740E)
Indicates that the windows are not fully closed (with the
power switch off, and the driver’s door open) A buzzer also sounds. Close all the windows.
(If equipped)
Indicates that the windows and the moon roof are not fully closed (with the power switch off, and the driver’s
door open) A buzzer also sounds. Close all the windows and the moon roof.
Indicates a malfunction in the brake override system
A buzzer also sounds.  Have the vehicle inspected by any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
Indicates that engine oil level is low This message may appear if the vehicle is stopped on a
slope. Move the vehicle to a level surface and check to see if the message disappears.A buzzer also sounds.
 Check the level of engine oil, and add if necessary.
Indicates that the hybrid system has overheated This message may be displayed when driving undersevere operating conditions. (For example, when driv-
ing up a long steep hill.) A buzzer also sounds.
 Stop and check. (P. 587)
Warning messageDetails/Actions
(Flashes)
(Flashes)

5528-2. Steps to take in an emergency
RC300h_EE(OM24740E)
Indicates a malfunction in the automatic headlight
leveling systemA buzzer also sounds.
 Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates a malfunction in:
• The Automatic High Beam system (if equipped); or
• The LED headlight system A buzzer also sounds.
 Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates that the accelerator and brake pedals are
being depressed simultaneously, and the brake override
system is operating. ( P. 207)
 Release the accelerator or brake pedal.
Indicates that the tire in flation pressure is low
 Check the tire inflation pressure, and adjust to the
appropriate level.
Warning messageDetails/Actions
(Flashes)

5548-2. Steps to take in an emergency
RC300h_EE(OM24740E)
Indicates that the engine oil is scheduled to be changed.
(The indicator will not work properly unless the message has been reset.) Check the engine oil, and change if necessary.
After changing the engine oil, the message should be reset.
Indicates that the engine oil should be changed. (Afterthe engine oil is changed and the message has been
reset.)  Check and change the engine oil, and oil filter by any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional. After changing the engine oil, the message should bereset.
(If equipped)
Indicates that the Automatic High Beam switch ispressed while the headlights are in low beam.
 Turn the high beam on and press the Automatic High Beam switch again.
(If equipped)
Indicates that, since the VSC (Vehicle Stability Control)system was turned off, the pre-crash brake system oper-
ation is stopped Operation of the pre-crash brake assist is alsostopped.
 Turn the VSC on. (P. 307)
(If equipped)
Indicates that the PCS (Pre-Crash Safety system) is not currently functional because the grille cover or the sen- sor is dirty
 Check the grille cover and the sensor and clean them if they are dirty.
Warning messageDetails/Actions
(Flashes)

5598-2. Steps to take in an emergency
8
When trouble arises
RC300h_EE(OM24740E)
OnceCon- tinuous
An attempt was made to lock the
doors using the smart entry & start system while the electronic key wasstill inside the vehicle.
 Retrieve the electronic key from the vehicle and lock thedoors again.
An attempt was made to lock either
door by opening a door and putting the inside lock button into the lockposition, then closing the door by
pulling on the outside door handle with the electronic key still inside thevehicle.
 Retrieve the electronic key from the vehicle and lock thedoors again.
An attempt was made to lock the
doors other than using the smart entry & start system while the elec-tronic key was still inside the vehicle.
 Retrieve the electronic key from the vehicle and lock the
doors again.
Once
The electronic key has a low 12-volt battery. Replace the electronic key bat-
tery. ( P. 511)
Once
The steering lock could not be released within 3 seconds of the
power switch being pressed.  Press the power switch while depressing the brake pedal and
moving the steering wheel left and right.
InteriorbuzzerExteriorbuzzerWarning messageDetails/Actions
(Flashes)
(Flashes)

5608-2. Steps to take in an emergency
RC300h_EE(OM24740E)
Once
Indicates a malfunction in the smart
entry & start system  Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly quali- fied and equipped professional.
Once
• When the doors were unlockedwith the mechanical key and thenthe power switch was pressed, the
electronic key could not be detected in the vehicle.• The electronic key could not be
detected in the vehicle even after the power switch was pressed twoconsecutive times.
 Touch the electronic key to the power switch while depressingthe brake pedal.
Once
During an hybrid system starting
procedure in the event that the elec- tronic key was not functioning prop-erly ( P. 580), the power switch
was touched with the electronic key.  Press the power switch within 10 seconds of the buzzer sounding.

Indicates that:
• With the power switch off, the doors were unlocked and then the
driver’s door was opened and closed• The power switch was turned to
ACCESSORY mode without starting the hybrid system• The shift lever was shifted to P or
N from another position with the power switch in ON mode. Press the power switch while
depressing the brake pedal.
Interior buzzerExteriorbuzzerWarning messageDetails/Actions
(Flashes)
(Flashes)

5648-2. Steps to take in an emergency
RC300h_EE(OM24740E)
●Stop the vehicle in a safe place on a hard, flat surface.
●Set the parking brake.
●Shift the shift lever to P.
●Stop the hybrid system.
●Turn on the emergency flashers. (P. 528)
●Check the degree of the tire damage.
A tire should only be repaired with
the emergency tire puncture repair
kit if the damage is caused by a nail
or screw passing through the tire
tread.
• Do not remove the nail or screw
from the tire. Removing the
object may widen the opening
and disenable emergency repair
with the kit.
• To avoid sealant leakage, move the vehicle until the area of the puncture, if
known, is positioned at the top of the tire.
■A flat tire that cannot be repaired with the emergency tire puncture repair kit
In the following cases, the tire cannot be repaired with the emergency tire puncture
repair kit. Contact any authorized Lexus dealer or repairer, or another duly qualified and equipped professional.
●When the tire is damaged due to driving without sufficient air pressure
●When the tire lost air pressure due to a crack or damage in the tire sidewall
●When the tire is visibly separated from the wheel
●When the cut or damage to the tread is 4 mm (0.16 in.) long or more
●When the wheel is damaged
●When 2 or more sharp objects, such as nails or screws, have passed through the tread on a single tire
●When there is more than one hole or cut in the damaged tire
●When the sealant has expired
Before repairing the vehicle