brake fluid LEXUS RX450h 2015 Owners Manual

371-1. Hybrid system
1
Before driving CAUTION■
High voltage and high temperature precautions
The vehicle has high voltage DC and AC systems as well as a 12-volt system. DC
and AC high voltage is very dangerous and can cause severe burns and electric
shock that may result in death or serious injury. ●
Never touch, disassemble, remove or re place the high voltage parts, cables and
their connectors.●
The hybrid system will become hot after starting as the system uses high voltage.
Be careful of both the high voltage and the high temperature, and always obey
the caution labels attached to the vehicle.
■
Road accident cautions
Observe the following precautions to reduce the risk of death or serious injury:●
Pull your vehicle off the road, shift the shif t lever to P, apply the parking brake, and
turn the hybrid system off.●
Do not touch the high voltage parts, cables and connectors.●
If electric wires are exposed inside or outside your vehicle, an electric shock may
occur. Never touch exposed electric wires.●
If a fluid leak occurs, do not touch it as it may be strong alkaline electrolyte from
the hybrid battery (traction battery). If it comes into contact with your skin or
eyes, wash it off immediately with a large amount of water or, if possible, boric
acid solution. Seek immediate medical attention.
●
If a fire occurs in the hybrid vehicle, le ave the vehicle as soon as possible. Never
use a fire extinguisher that is not meant for electric fires. Using even a small
amount of water may be dangerous. ●
Never try to open the service plug access
hole located under the rear seat. The ser-
vice plug is used only when the vehicle is
serviced and is subject to high voltage.

1762-1. Driving procedures
NOTICE■
When encountering flooded roads
Do not drive on a road that has flooded after heavy rain etc. Doing so may cause the
following serious damage to the vehicle: ●
Engine stalling●
Short in electrical components●
Engine damage caused by water immersion
In the event that you drive on a flooded road and the vehicle is flooded, be sure to
have your Lexus dealer check the following:●
Brake function●
Changes in quantity and quality of oil and fluid used for the engine, hybrid trans-
mission, etc., and, for AWD models, the rear electric motor (traction motor).●
Lubricant condition for the bearings, susp ension joints (where possible) and the
function of all joints, bearings, etc.

3022-5. Driving information
Winter driving tips Carry out the necessary preparations and inspections before driving the
vehicle in winter. Always drive the ve hicle in a manner appropriate to the
prevailing weather conditions.
■ Pre-winter preparations
● Use fluids that are appropria te to the prevailing outside tempera-
tures.
• Engine oil
• Engine coolant
• Power control unit coolant
• Washer fluid
● Have a service technician inspect the condition of the 12-volt bat-
tery.
● Have the vehicle fitted with four snow tires or purchase a set of
tire chains for the front tires. Ensure that all tires are the same size and brand, and that chains match
the size of the tires.
■ Before driving the vehicle
Perform the following accord ing to the driving conditions:
● Do not try to forcibly open a w indow or move a wiper that is fro-
zen. Pour warm water over the frozen area to melt the ice. Wipe
away the water immediately to prevent it from freezing.
● To ensure proper operation of the climate control system fan,
remove any snow that has accumu lated on the air inlet vents in
front of the windshield.
● Check for and remove any exce ss ice or snow that may have
accumulated on the exterior lights, vehicle's roof, chassis, around
the tires or on the brakes.
● Remove any snow or mud from the bottom of your shoes before
getting in the vehicle.

6434-2. Maintenance
4
Maintenance and care General maintenance
Engine compartment Items Check points
Brake fluid Is the brake fluid at the correct level?
(  P. 6 6 2 )
Coolant Is the coolant at the correct level?
(  P. 6 5 9 )
Engine oil Is the engine oil at the correct level?
(  P. 6 5 6 )
Exhaust system There should not be any fumes or
strange sounds.
Radiator/condenser/hoses The radiator and condenser should
be free from foreign objects.
(  P. 6 6 1 )
Wa s h e r f l u i d Is there sufficient washer fluid?
(  P. 663)Listed below are the general maintenance items that should be performed
at the intervals specified in the “Warranty and Service Guide” or “Owner’s
Manual Supplement”. It is recomme nded that any problem you notice
should be brought to the attention of your Lexus dealer or qualified service
shop for advice.

6484-3. Do-it-yourself maintenance
Do-it-yourself service precautions If you perform maintenance by yourself, be sure to follow the correct pro-
cedures as given in these sections.
Items Pa r t s a n d t o o l s
12-volt battery condition (  P. 664
) •Grease
• Conventional wrench
(for terminal clamp bolts)
Brake fluid level (  P. 6 6 2 ) • FMVSS No.116 DOT 3 or SAE
J1703 brake fluid
•Rag or paper towel
• Funnel (used only for adding brake
fluid)
Engine/power control unit coolant
level (  P. 6 5 9 ) • “Toyota Super Long Life Coolant”
or a similar high quality ethylene
glycol based non-silicate, non-
amine, non-nitrite and non-borate
coolant with long-life hybrid
organic acid technology.
For the U.S.A.:
“Toyota Super Long Life Coolant”
is pre-mixed with 50% coolant and
50% deionized water.
For Canada:
“Toyota Super Long Life Coolant”
is pre-mixed with 55% coolant and
45% deionized water.
• Funnel (used only for adding cool-
ant)

6544-3. Do-it-yourself maintenance
Engine compartment
Brake fluid reservoir
(  P. 6 6 2 )
Engine oil filler cap
(  P. 6 5 7 )
Engine oil level dipstick
(  P. 6 5 6 )
Power control unit coolant
reservoir (  P. 6 5 9 )
Fuse boxes (  P. 6 8 9 ) Engine coolant reservoir
(  P. 6 5 9 )
Condenser (  P. 6 6 1 )
Radiator (  P. 6 6 1 )
Electric cooling fans
Power control unit coolant
radiator (  P. 6 6 1 )
Washer fluid tank (  P. 663)

6624-3. Do-it-yourself maintenance
Brake fluid
■ Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN”
lines on the tank.
■ Adding fluid
Make sure to check the fluid type and prepare the necessary item. Fluid type FMVSS No.116 DOT 3 or SAE J1703
Items Clean funnel
■
Brake fluid can absorb moisture from the air
Excess moisture in the brake fluid can cause a dangerous loss of braking efficiency.
Use only newly opened brake fluid.
CAUTION■
When filling the reservoir
Take care because brake fluid can harm your hands or eyes and damage painted
surfaces.
If fluid gets on your hands or in your eyes, flush the affected area with clean water
immediately.
If you still experience discomfort, see a doctor.

6634-3. Do-it-yourself maintenance
4
Maintenance and care
Washer fluid
If any washer does not work or the
warning message appears on the
multi-information display, the
washer tank may be empty. Add
washer fluid.NOTICE■
If the fluid level is low or high
It is normal for the brake fluid level to go down slightly as the brake pads wear out or
when the fluid level in the accumulator is high.
If the reservoir needs frequent re filling, may be a serious problem.
CAUTION■
When adding washer fluid
Do not add washer fluid when the hybrid system is hot or operating as washer fluid
contains alcohol and may catch fire if spilled on the hybrid system etc.
NOTICE■
Do not use any fluid other than washer fluid
Do not use soapy water or engine antifreeze instead of washer fluid.
Doing so may cause streaking on the vehicle’s painted surfaces.
■
Diluting washer fluid
Dilute washer fluid with water as necessary.
Refer to the freezing temperatures listed on the label of the washer fluid bottle.

7325-1. Essential information
If you think something is wrong If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■ Visible symptoms
● Fluid leaks under the vehicle.
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temper ature gauge needle continually points
higher than normal.
■ Audible symptoms
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the hybrid system
■ Operational symptoms
● Engine missing, stumbling or running rough
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking.
● Vehicle pulls heavily to one side when driving on a level road.
● Loss of brake effectiveness, sp ongy feeling, pedal almost touches
the floor

5
When trouble arises
7335-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer sounds...Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.
The following warning in dicates a possible problem in the brake system.
Immediately stop the vehi cle in a safe place and contact your Lexus
dealer.
* : Parking brake engaged warning buzzer
 P. 74 8
Stop the vehicle immediately.
The following warning indicates the po ssibility of damage to the vehicle
that may lead to an ac cident. Immediately stop the vehicle in a safe place
and contact your Lexus dealer. Warning light Warning light/Details
(U.S.A.)

(Canada) Brake system warning light (warning buzzer)
*•Low brake fluid
• Malfunction in the brake system
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released the system is operating normally.
Warning light Warning light/Details
Charging system warning light
Indicates a malfunction in the vehicle’s charging systemCalmly perform the following actions if any of the warning lights comes on
or flashes. If a light comes on or flashes, but then goes off, this does not nec-
essarily indicate a malfunction in the system.