2017 LEXUS RC200T cooling

5237-3. Do-it-yourself maintenance
7
Maintenance and care
RC200t_RC F_EE(OM24728E)
RC F
For right-hand drive vehicles: The battery and the fuse box in front of the battery are located on the opposite side of theengine compartment.
Fuse boxes ( P. 566)
Battery ( P. 530)
Engine oil level dipstick
( P. 524)
Engine coolant reservoir
( P. 527)
Engine oil filler cap ( P. 525)
Washer fluid tank ( P. 534)
Electric cooling fans
Condenser ( P. 529)
Radiator ( P. 529)
1
2
3
4
5
6
7
8
9

5287-3. Do-it-yourself maintenance
RC200t_RC F_EE(OM24728E)
■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 hybridorganic acid technology.
“Toyota Super Long Life Coolant” is a mixt ure of 50% coolant and 50% deionized water. (Minimum temperature: -35 C [-31F])
For more details about coolant, contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
■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 any authorized Lexus dealer or repairer, or another dulyqualified and equipped professional, test the cap and check for leaks in the cooling sys-
tem.
WARNING
■When the engine is hot (RC200t)
Do not remove the engine coolant reservoir cap, intercooler coolant reservoir cap and radiator cap. ( P. 662)
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. 662) The cooling system may be under pressure and may spray hot coolant if the cap isremoved, causing serious injuries, such as burns.

6588-2. Steps to take in an emergency
RC200t_RC F_EE(OM24728E)
WARNING
■Avoiding battery fires or explosions
Observe the following precautions to preven t accidentally igniting the flammable gas that may be emitted from the battery:
●Make sure each jumper cable is connected to the correct terminal and that it is notunintentionally in contact with any other than the intended terminal.
●Do not allow the other end of the jumper cable connected to the “+” terminal to come
into contact with any other parts or metal surfaces in the area, such as brackets or unpainted metal.
●Do not allow the + and - clamps of the jumper cables to come into contact with each
other.
●Do not smoke, use matches, cigarette lighters or allow open flame near the battery.
●If the battery fluid level is excessively low ( P. 530), do not use the battery.
■Battery precautions
The battery contains poisonous and corrosive acidic electrolyte, while related parts contain lead and lead compounds. Observ e the following precautions when handling
the battery:
●When working with the battery, always wear safety glasses and take care not to allow any battery fluids (acid) to come into contact with skin, clothing or the vehicle body.
●Do not lean over the battery.
●In the event that battery fluid comes into contact with the skin or eyes, immediatelywash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention can be received.
●Always wash your hands after handling the battery support, terminals, and other bat-
tery-related parts.
●Do not allow children near the battery.
NOTICE
■When handling jumper cables
When connecting the jumper cables, ensure that they do not become entangled in the
cooling fans or engine drive belt.

6598-2. Steps to take in an emergency
8
When trouble arises
RC200t_RC F_EE(OM24728E)
●The engine coolant temperature gauge (P. 118, 124) is in the red zone or a
loss of engine power is experienced. (F or example, the vehicle speed does not
increase.)
●“Engine Coolant High Temperature” is shown on the multi-information dis-
play.
●Steam comes out from under the hood.
Stop the vehicle in a safe place and turn off the air conditioning system, and
then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the engine has cooled down sufficiently, inspect the hoses and radiator
core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks, immediately contact any authorized Lexus dealer or repairer, or another duly qualified and equipped professional.
If your vehicle overheats
The following may indicate that your vehicle is overheating.
Correction procedures
1
2
3
1
2
RC200tRC F

6618-2. Steps to take in an emergency
8
When trouble arises
RC200t_RC F_EE(OM24728E)
Add coolant if necessary.
Water can be used in an emergency if coolant is unavailable.
Start the engine and turn the air conditioning system on to check that the radi-
ator cooling fans operate and to check for coolant leaks from the radiator or
hoses.
The fans operate when the air conditioning system is turned on immediately after a cold start. Confirm that the fans are operating by checking the fan sound and air flow.
If it is difficult to check these, turn the air conditioning system on and off repeatedly. (The fan may not operate in freezing temperatures.)
If the fans are not operating:
Stop the engine immediately and contact any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
If the fans are operating:
Have the vehicle inspected at the nearest authorized Lexus dealer or repairer,
or another duly qualified and equipped professional.
5
Engine (RC200t)Engine (RC F)
Intercooler (RC200t)
6
7

6638-2. Steps to take in an emergency
8
When trouble arises
RC200t_RC F_EE(OM24728E)
NOTICE
■When adding engine coolant
Add coolant slowly after the engine has cool ed down sufficiently. Adding cool coolant to a hot engine too quickly can cause damage to the engine.
■To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreign matter (such as sand or dust etc.).
●Do not use any coolant additive.

6769-1. Specifications
RC200t_RC F_EE(OM24728E)
*: Vehicles with a Stop & Start system
■Spark plug
Cooling system
CapacityRC200t
Gasoline engine
8.0 L (8.5 qt., 7.0 Imp. qt.)
8.1 L (8.6 qt., 7.1 Imp. qt.)*
Intercooler
3.1 L (3.3 qt., 2.7 Imp. qt.)
RC F 11.6 L (12.3 qt., 10.2 Imp. qt.)
Coolant type
Use either of the following:
• “Toyota Super Long Life Coolant” • Similar high-quality ethylene glycol-based non-silicate, non-amine, non-nitrite, and non-borate
coolant with long-life hybrid organic acid tech- nologyDo not use plain water alone.
Ignition system
RC200tRC F
MakeNGK DILFR7K9GDENSO FK20HBR-J8
Gap0.9 mm (0.035 in.)0.8 mm (0.031 in.)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.

707Alphabetical index
RC200t_RC F_EE(OM24728E)
Moon roof precautions .................. 234
Power window lock switch............227
Power window precautions .........230
Removed electronic key
battery precautions ...................... 565
Seat belt precautions .......................... 48
Seat heater precautions ................ 490
Trunk precautions .............................. 173
Cleaning .......................................... 506, 511
Aluminum wheels ..............................507
Exterior................................................... 506
Interior ........................................................ 511
Seat belts..................................................512
Clock .......................................................... 501
Coat hooks ..............................................504
Condenser ............................................. 529
Console box ........................................... 496
Cooling system ...................................... 527
Engine overheating ......................... 659
Cruise control
Cruise control ..................................... 294
Dynamic radar cruise control .....298
Cup holders ............................................ 497
Current fuel consumption.......... 134, 141
Curtain shield airbags ........................... 49
Customizable features .......................686
DAB (Digital Audio Broadcast) .......415
Daytime running light system ......... 265
Defogger
Outside rear view mirrors ............ 484
Rear window........................................ 484
Windshield ........................................... 484
Differential............................................... 678
Digital Audio Broadcast (DAB) .......415
Dimensions ............................................. 668
Display
Drive information........................ 134, 141
Dynamic radar cruise control ..... 298
LDA (Lane Departure Alert) ........ 315
Multi-information display........ 131, 139
Warning message ............................ 597
Distance ............................................ 134, 141
Do-it-yourself maintenance ...............516
Door courtesy lights
Location ................................................. 492
Door lock
Doors......................................................... 164
Smart entry & start system ............. 175
Wireless remote control .................158
D