ABS LEXUS RC300H 2017 User Guide

3104-5. Using the driving support systems
RC300h_EE(OM24740E)
WARNING
■Replacing tires
Make sure that all tires are of the specified size, brand, tread pattern and total load capacity. In addition, make sure that the tire s are inflated to the recommended tire infla-
tion pressure level.
The ABS, TRC and VSC systems will not function correctly if different tires are installed on the vehicle.
Contact any authorized Lexus dealer or repairer, or another duly qualified and equipped professional for further information when replacing tires or wheels.
■Handling of tires and the suspension
Using tires with any kind of problem or modif ying the suspension will affect the driving assist systems, and may cause a system to malfunction.

3114-5. Using the driving support systems
4
Driving
RC300h_EE(OM24740E)
◆Pre-crash warning
When a high possibility of a frontal
collision is detected, the pre-crash
safety system warning light flashes, a
buzzer sounds and a message is
shown on the multi-information dis-
play to urge the driver to take eva-
sive action.
◆Pre-crash brake assist
When there is a high possibility of a frontal collision, the system applies
greater braking force in relation to how strongly the brake pedal is depressed.
The system may not warn the driver using a warning light, warning display and
buzzer when the system detects and judges braking operations.
◆Pre-crash braking
When there is a high possibility of a frontal collision, the system warns the
driver using a warning ligh t, warning display and buzzer. If the system deter-
mines that a collision is unavoidable, the brakes are automatically applied to
reduce the collision speed.
◆Suspension control (if equipped)
When the system determines that there is a high possibility of a frontal colli-
sion, the operation of Adaptive Variable Suspension System ( P. 305) opti-
mally controls the damping force of the shock absorber.
PCS (Pre-Crash Safety system)
: If equipped
When the radar sensor detects the possibil ity of a frontal collision, brakes are
automatically engaged to lessen im pact as well as vehicle damage.
The pre-crash safety system can be turn ed on and off as necessary by operat-
ing the switch. ( P. 312)

3184-5. Using the driving support systems
RC300h_EE(OM24740E)
WARNING
■Cautions regarding the assist contents of the system
By means of alarms and brake control, the pr e-crash safety system is intended to assist the driver in avoiding collisions throug h the process of LOOK-JUDGE-ACT. There are
limits to the degree of assistance the system can provide, so please keep in mind the following important points.
●Assisting the driver in watching the road
The pre-crash safety system is only able to detect obstacles directly in front of the vehicle, and only within a limited range. It is not a mechanism that allows careless or inattentive driving, and it is not a system that can assist the driver in low-visibility con-
ditions. It is still necessary for the driver to pay close attention to the vehicle’s surroundings.
●Assisting the driver in making correct judgment
When attempting to estimate the possibility of a collision, the only data available to the pre-crash safety system is that from obstacles it has detected directly in front ofthe vehicle. Therefore, it is absolutely necessary for the driver to remain vigilant and
to determine whether or not there is a po ssibility of collision in any given situation.
●Assisting the driver in taking action The pre-crash brake assist function of the pre-crash safety system is designed to help
reduce the severity of a collision, and will only operate when the system determines that a collision is unavoidable. This system is not capable of automatically avoiding a collision or bringing the vehicle to a stop safely without appropriate operations per-
formed by the driver. For this reason, wh en encountering a dangerous situation the driver must take direct and immediate acti on in order to ensure the safety of all involved.

5097-3. Do-it-yourself maintenance
7
Maintenance and care
RC300h_EE(OM24740E)
Turn the power switch off.
Open the glove box. Lift up the side
with the stay, disconnect the stay
tabs and remove the partition by
pulling horizontally.
Press the tabs and remove the filter
cover.
Press the tabs and remove the filter
case.
Air conditioning filter
The air conditioning filter must be changed regularly to maintain air condi-
tioning efficiency.
Removal method
1
2
3
4

5147-3. Do-it-yourself maintenance
RC300h_EE(OM24740E)
Turn the power switch off.
Open the fuse box cover.
Engine compartment
Remove the clips.
Push the tabs on either side to
detach the lock and lift the lid off
while pulling the lock plate.
When installing the lid, check that the
lock plate and the tabs on either side are connected correctly.
Checking and replacing fuses
If any of the electrical components do not operate, a fuse may have blown. If
this happens, check and repl ace the fuses as necessary.
1
2

5237-3. Do-it-yourself maintenance
7
Maintenance and care
RC300h_EE(OM24740E)
Align the tabs and push the light
unit toward the front of the vehicle
to install it.
Install the 2 screws and 2 covers.
5
6

5388-2. Steps to take in an emergency
RC300h_EE(OM24740E)
SRS warning light Indicates a malfunction in:
• The SRS airbag system; or • The seat belt pretensioner system Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional immediately.
ABS warning lightIndicates a malfunction in:
•The ABS; or • The brake assist system Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional immediately.
Electric power steering system warning light (warning buzzer)Indicates a malfunction in the EPS (Electric Power Steering) sys-
tem  Have the vehicle inspected by any authorized Lexus dealer or repairer, or another duly qualified and equipped professional
immediately.
(Flashes) (If equipped)
Pre-crash safety system warning lightIndicates a malfunction in the PCS (Pre-Crash Safety system)The warning light will operate as follows, even when the system is
not malfunctioning: • The light will flash quickly when the system is operating.
( P. 311) • The light will turn on when the pre-crash safety system is dis- abled. ( P. 312)
• The light will turn on when th e VSC (Vehicle Stability Control) system is disabled. ( P. 307) • The light will flash when the sy stem cannot temporarily be used.
( P. 554)  Have the vehicle inspected by any authorized Lexus dealer or repairer, or another duly qualified and equipped professional
immediately.
Slip indicator Indicates a malfunction in:• The VSC (Vehicle Stability Control) system;
• The TRC (Traction Control) system; or • The hill-start assist control systemThe light will flash when the VSC or the TRC system is operating.
 Have the vehicle inspected by any authorized Lexus dealer or repairer, or another duly qualified and equipped professionalimmediately.
Warning lightWarning light/Details/Actions

5418-2. Steps to take in an emergency
8
When trouble arises
RC300h_EE(OM24740E)
■If the tire pressure warning light frequently comes on after blinking for 1 minute
If the tire pressure warning light frequently comes on after blinking for 1 minute when the power switch is turned to ON mode, have it checked by any authorized Lexus dealer or
repairer, or another duly qua lified and equipped professional.
■Warning buzzer
In some cases, the buzzer may not be heard due to being in a noisy location or audio
sound.
WARNING
■If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact any authorized Lexus dealer or repairer, or another duly qualified and equipped professional. The vehicle will
become extremely unstable during braking, and the ABS system may fail, which could cause an accident resulting in death or serious injury.
■When the electric power steering system warning light comes on
The steering wheel may become extremely heavy. If the steering wheel becomes heavier than us ual when operating, hold firmly and oper- ate using more force than usual.
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause a loss of vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressureimmediately.
●If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire. Check the tires. If a tire is flat, repair the flat tire by using emergency tire puncture repair kit.
●Avoid abrupt maneuvering and braking. If th e vehicle tires deteriorate, you could lose
control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.
NOTICE
■To ensure the tire pressure warning system operates properly
Do not install tires with different specifications or makers, as the tire pressure warning system may not operate properly.

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)

5828-2. Steps to take in an emergency
RC300h_EE(OM24740E)
If you have a set of jumper (or booster) cables and a second vehicle with a 12-volt
battery, you can jump start your vehicle by following the steps below.
Confirm that the electronic key is
being carried.
When connecting the jumper (or booster) cables, depending on the situa-tion, the alarm may activate and doors
locked. (P. 104)
Open the hood ( P. 471) and fuse
box cover.
Remove the clips.
Push the tabs on either side to
detach the lock and lift the lid off
while pulling the lock plate.
If the 12-volt battery is discharged
The following procedures may be used to start the hybrid system if the 12-volt
battery is discharged.
You can also call any authorized Lexus dealer or repairer, or another duly
qualified and equipped professional.
1
2
1
2