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LEXUS RC F (2019 year). Instruction - part 25

398

6-3. Do-it-yourself maintenance

RC F_U



RC300

Fuse boxes

(

P. 429)

Battery (

P. 408)

Engine oil level dipstick

(

P. 400)

Engine oil filler cap

(

P. 402)

Engine coolant reservoir

(

P. 404)

Brake fluid reservoir (

P. 407)

Washer fluid tank

(

P. 411)

Electric cooling fans
Condenser (

P. 406)

Intercooler radiator (

P. 406)

Radiator (

P. 406)

Intercooler coolant reservoir

(

P. 404)

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3

4
5

8
9

399

6-3. Do-it-yourself maintenance

RC F_U

Main

tenance an

d care



RC F

Fuse boxes

(

P. 429)

Battery (

P. 408)

Engine oil level dipstick

(

P. 400)

Engine coolant reservoir

(

P. 404)

Engine oil filler cap

(

P. 402)

Brake fluid reservoir (

P. 407)

Washer fluid tank

(

P. 411)

Electric cooling fans
Condenser (

P. 406)

Radiator (

P. 406)

2
3

6
7
8
9

400

6-3. Do-it-yourself maintenance

RC F_U

With the engine at operating temperature and turned off, check the oil level on
the dipstick.

■

Checking the engine oil

Park the vehicle on level ground. After warming up the engine and turning
it off, wait more than 5 minutes for the oil to drain back into the bottom of
the engine.
Holding a rag under the end, pull the dipstick out.

Wipe the dipstick clean.
Reinsert the dipstick fully.

Engine oil



RC350/RC300 AWD



RC300



RC F

3
4

401

6-3. Do-it-yourself maintenance

RC F_U

Main

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d care

Holding a rag under the end, pull
the dipstick out and check the oil
level.

Low
Normal
Excessive

The shape of the dipstick may dif-
fer depending on the type of vehi-
cle or engine.
Wipe the dipstick and reinsert it fully.

2
3

402

6-3. Do-it-yourself maintenance

RC F_U

■

Adding engine oil
If the oil level is below or near the low level mark, add engine oil of the same
type as that already in the engine.

Make sure to check the oil type and prepare the items needed before adding
oil.

Remove the oil filler cap by turning it counterclockwise.
Add engine oil slowly, checking the dipstick.
Install the oil filler cap by turning it clockwise.



RC350/RC300 AWD



RC300



RC F

Engine oil selection

P. 541, 54 3

Oil quantity (Low

 Full) 1.6 qt. (1.5 L, 1.3 Imp. qt.)

Items

Clean funnel

2
3

403

6-3. Do-it-yourself maintenance

RC F_U

Main

tenance an

d care

■

Engine oil consumption
A certain amount of engine oil will be consumed while driving. In the following situations,

oil consumption may increase, and engine oil may need to be refilled in between oil

maintenance intervals.

●

When the engine is new, for example directly after purchasing the vehicle or after

replacing the engine

●

If low quality oil or oil of an inappropriate viscosity is used

●

When driving at high engine speeds or with a heavy load, or when driving while accel-

erating or decelerating frequently

●

When leaving the engine idling for a long time, or when driving frequently through

heavy traffic

■

After changing the engine oil (except RC F)
The engine oil maintenance data should be reset. Perform the following procedures:

Select

on the multi-information display. (

P. 111)

Press the

meter control switch on the steering wheel to select “Vehicle

Settings” then “Oil Maintenance”. (To confirm setting, press

Select “Yes” and then press

A message is displayed on the multi-information display.

WARNING

■

Used engine oil

●

Used engine oil contains potentially harmful contaminants which may cause skin dis-

orders such as inflammation and skin cancer, so care should be taken to avoid pro-

longed and repeated contact. To remove used engine oil from your skin, wash

thoroughly with soap and water.

●

Dispose of used oil and filters only in a safe and acceptable manner. Do not dispose of

used oil and filters in household trash, in sewers or onto the ground.

Call your Lexus dealer, service station or auto parts store for information concerning

recycling or disposal.

●

Do not leave used engine oil within the reach of children.

NOTICE

■

To prevent serious engine damage
Check the oil level on a regular basis.

■

When replacing the engine oil

●

Be careful not to spill engine oil on the vehicle components.

●

Avoid overfilling, or the engine could be damaged.

●

Check the oil level on the dipstick every time you refill the vehicle.

●

Be sure the engine oil filler cap is properly tightened.

3
4

404

6-3. Do-it-yourself maintenance

RC F_U

■

Engine coolant reservoir
The coolant level is satisfactory if it is between the “FULL” and “LOW” lines on
the reservoir when the engine is cold.

Coolant



RC350/RC300 AWD



RC300



RC F

Reservoir cap
“FULL” line
“LOW” line

If the level is on or below the “LOW” line, add coolant up to the “FULL” line.

(

P. 526)

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3

405

6-3. Do-it-yourself maintenance

RC F_U

Main

tenance an

d care

■

Intercooler coolant reservoir (RC300)
The coolant level is satisfactory if it is between the “F” and “L” lines on the res-
ervoir when the engine is cold.

Reservoir cap
“F” line
“L” line

If the level is on or below the “L” line,

add coolant up to the “F” line.

(

P. 526)

■

Coolant selection
Only use “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.
U.S.A.:

“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deionized water.

(Minimum temperature: -31

F [-35C])

Canada:

“Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45% deionized water.

(Minimum temperature: -44

F [-42C])

For more details about engine coolant, contact your Lexus dealer.

■

If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine and intercooler coolant reservoir caps, drain

cock and water pump.

If you cannot find a leak, have your Lexus dealer test the cap and check for leaks in the

cooling system.

2
3

406

6-3. Do-it-yourself maintenance

RC F_U

Check the radiator, condenser and intercooler radiator and clear away any for-
eign objects.
If any of the above parts are extremely dirty or you are not sure of their condition,
have your vehicle inspected by your Lexus dealer.

WARNING

■

When the engine is hot (RC350/RC300)
Do not remove the engine coolant reservoir cap, intercooler coolant reservoir cap and

coolant inlet cap. (

P. 530)

The cooling system may be under pressure and may spray hot coolant if the cap is

removed, causing serious injuries, such as burns.

■

When the engine is hot (RC F)
Do not remove the engine coolant reservoir cap. (

P. 530)

The cooling system may be under pressure and may spray hot coolant if the cap is

removed, causing serious injuries, such as burns.

NOTICE

■

When adding coolant
Coolant is neither plain water nor straight antifreeze. The correct mixture of water and

antifreeze must be used to provide proper lubrication, corrosion protection and cool-

ing. Be sure to read the antifreeze or coolant label.

■

If you spill coolant
Be sure to wash it off with water to prevent it from damaging parts or paint.

Radiator, condenser and intercooler radiator (if equipped)

WARNING

■

When the engine is hot
Do not touch the radiator, condenser or intercooler as they may be hot and cause seri-

ous injuries, such as burns.

407

6-3. Do-it-yourself maintenance

RC F_U

Main

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d care

■

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 items.

■

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.

Brake fluid



RC350/RC300



RC F

Fluid type

SAE J1703 or FMVSS No.116 DOT 3 brake fluid

SAE J1704 or FMVSS No.116 DOT 4 brake fluid

Items

Clean funnel

WARNING

■

When filling the reservoir
Take care as brake fluid can harm your hands and 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.

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 refilling, there may be a serious problem.

408

6-3. Do-it-yourself maintenance

RC F_U

Check the battery as follows.

■

Battery exterior
Make sure that the battery terminals are not corroded and that there are no
loose connections, cracks, or loose clamps.

Terminals
Hold-down clamp

■

Checking battery condition (vehicles with the battery indicator)
Check the battery condition by indicator color.

Blue: Good condition
Red: Not working properly.
Have the battery checked by your
Lexus dealer.
White: Charging is necessary.
Have the vehicle inspected by
your Lexus dealer.

Battery

409

6-3. Do-it-yourself maintenance

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d care

■

Before recharging
When recharging, the battery produces hydrogen gas which is flammable and explosive.

Therefore, observe the following before recharging:

●

If recharging with the battery installed on the vehicle, be sure to disconnect the ground

cable.

●

Make sure the power switch on the charger is off when connecting and disconnecting

the charger cables to the battery.

■

After recharging/reconnecting the battery
The engine may not start. Follow the procedure below to initialize the system.

Shift the shift lever to P.
Open and close either door.
Restart the engine.

●

Unlocking the doors using the smart access system with push-button start may not be

possible immediately after reconnecting the battery. If this happens, use the wireless

remote control or the mechanical key to lock/unlock the doors.

●

Start the engine with the engine switch in ACCESSORY mode. The engine may not

start with the engine switch turned off. However, the engine will operate normally from

the second attempt.

●

The engine switch mode is recorded by the vehicle. If the battery is disconnected and

reconnected, the vehicle will return the engine switch mode to the status it was in

before the battery was disconnected. Make sure to turn off the engine before discon-

necting the battery. Take extra care when connecting the battery if the engine switch

mode prior to the battery being disconnected is unknown.

If the system will not start even after multiple attempts, contact your Lexus dealer.

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3

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6-3. Do-it-yourself maintenance

RC F_U

WARNING

■

Chemicals in the battery
Batteries contain poisonous and corrosive sulfuric acid and may produce hydrogen

gas which is flammable and explosive. To reduce the risk of death or serious injury, take

the following precautions while working on or near the battery:

●

Do not cause sparks by touching the battery terminals with tools.

●

Do not smoke or light a match near the battery.

●

Avoid contact with eyes, skin and clothes.

●

Never inhale or swallow electrolyte.

●

Wear protective safety glasses when working near the battery.

●

Keep children away from the battery.

■

Where to safely charge the battery
Always charge the battery in an open area. Do not charge the battery in a garage or

closed room where there is insufficient ventilation.

■

How to recharge the battery
Only perform a slow charge (5 A or less). The battery may explode if charged at a

quicker rate.

■

Emergency measures regarding electrolyte

●

If electrolyte gets in your eyes

Flush your eyes with clean water for at least 15 minutes and get immediate medical

attention. If possible, continue to apply water with a sponge or cloth while traveling to

the nearest medical facility.

●

If electrolyte gets on your skin

Wash the affected area thoroughly. If you feel pain or burning, get medical attention

immediately.

●

If electrolyte gets on your clothes

It can soak through clothing on to your skin. Immediately take off the clothing and fol-

low the procedure above if necessary.

●

If you accidentally swallow electrolyte

Drink a large quantity of water or milk. Get emergency medical attention immedi-

ately.

NOTICE

■

When recharging the battery
Never recharge the battery while the engine is running. Also, be sure all accessories

are turned off.

411

6-3. Do-it-yourself maintenance

RC F_U

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d care

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.

Washer fluid



RC350/RC300 AWD



RC300



RC F

WARNING

■

When adding washer fluid
Do not add washer fluid when the engine is hot or running as washer fluid contains

alcohol and may catch fire if spilled on the engine 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, as well as damaging

the pump leading to problems of the washer fluid not spraying.

■

Diluting washer fluid
Dilute washer fluid with water as necessary.

Refer to the freezing temperatures listed on the label of the washer fluid bottle.

412

6-3. Do-it-yourself maintenance

RC F_U

Check if the treadwear indicators are showing on the tires. Also check the tires
for uneven wear, such as excessive wear on one side of the tread.
Check the spare tire condition and pressure if not rotated.

New tread
Worn tread
Treadwear indicator

The location of treadwear indicators is shown by a “TWI” or “

” mark, etc., molded

into the sidewall of each tire.
Replace the tires if the treadwear indicators are showing on a tire.



Vehicles with front and rear tires of the same size

Rotate the tires in the order shown.

To equalize tire wear and extend tire life,

Lexus recommends that tire rotation is

carried out at the same interval as tire

inspection.
Do not fail to initialize the tire pressure

warning system after tire rotation.



Vehicles with front and rear tires of differing sizes

Tires cannot be rotated.

Tires

Replace or rotate tires in accordance with maintenance schedules and tread-
wear.

Checking tires

Tire rotation

2
3

Front

413

6-3. Do-it-yourself maintenance

RC F_U

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d care

Your vehicle is equipped with a tire pressure warning system that uses tire pres-
sure warning valves and transmitters to detect low tire inflation pressure before
serious problems arise.

●

If the tire pressure drops below a predetermined level, the driver is warned by
a screen display and a warning light. (

P. 455, 477)

●

The tire pressure detected by the
tire pressure warning system can be
displayed on the multi-information
display. (

P. 103, 118)

The illustration used is intended as an

example, and may differ from the image

that is actually displayed on the multi-

information display.

◆

Installing tire pressure warning valves and transmitters

When replacing tires or wheels, tire pressure warning valves and transmitters
must also be installed.
When new tire pressure warning valves and transmitters are installed, new ID
codes must be registered in the tire pressure warning computer and the tire
pressure warning system must be initialized. Have tire pressure warning valve
and transmitter ID codes registered by your Lexus dealer. (

P. 414)

◆

Initializing the tire pressure warning system

■

The tire pressure warning system must be initialized in the following circum-
stances:

●

When rotating the tires.

●

When the tire inflation pressure is changed such as when changing travel-
ing speed.

●

When changing the tire size.

When the tire pressure warning system is initialized, the current tire inflation
pressure is set as the benchmark pressure.

Tire pressure warning system

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