engine coolant LEXUS RX200T 2017 User Guide

6007-3. Do-it-yourself maintenance
RX350/RX200t_EE_OM48F32E
RX200t
Intercooler coolant reservoir
( P. 605)
Engine oil filler cap ( P. 603)
Engine oil level dipstick ( P. 601)
Engine coolant reservoir
( P. 605)
Battery ( P. 607)
Fuse box ( P. 640)
Radiator ( P. 607)
Condenser ( P. 607)
Electric cooling fans
Intercooler radiator ( P. 607)
Washer fluid tank ( P. 611)
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6057-3. Do-it-yourself maintenance
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Maintenance and care
RX350/RX200t_EE_OM48F32E
The coolant level is satisfactory if it is between the “FULL” and “LOW” lines on
the reservoir when the engine is cold.
■Engine coolant reservoir
If the level is on or below the “LOW” li ne, add coolant up to the “FULL” line.
( P. 718)
■Intercooler coolant reservoir
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the “LOW”
line, add coolant up to the “FULL” line. ( P. 718)
Coolant
RX350RX200t
Reservoir cap
“FULL” line
“LOW” line1
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6067-3. Do-it-yourself maintenance
RX350/RX200t_EE_OM48F32E
■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 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
Do not remove the engine coolant reservoir cap, intercooler coolant reservoir cap and radiator cap.
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.

6648-2. Steps to take in an emergency
RX350/RX200t_EE_OM48F32E
●Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
●Flat-looking tires or uneven tire wear
●Engine coolant temperature gauge needle continually points higher than nor-
mal
●Changes in exhaust sound
●Excessive tire squeal when cornering
●Strange noises related to the suspension system
●Pinging or other noises related to the engine
●Engine missing, stumbling or running roughly
●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, spongy fe eling, pedal almost touches the floor
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact any authorized Lexus dealer or repairer, or
another duly qualified an d equipped professional as soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

6758-2. Steps to take in an emergency
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When trouble arises
RX350/RX200t_EE_OM48F32E
●If the following messages are shown, there may be a malfunction.
Immediately stop the vehicle in a safe place and contact any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional. Con-
tinuing to drive the vehicle may be dangerous.
• “Braking Power Low Stop in a Safe Place See Owner’s Manual”
• “Oil Pressure Low Stop in a Safe Place See Owner’s Manual”
• “Charging System Malfunction See Owner’s Manual”
●If the following message is shown, there may be a malfunction.
Immediately have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
• “Smart Entry & Start System Malfunction See Owner’s Manual”
●If “Engine Coolant Temp High Stop in a Safe Place See Owner’s Manual” is
shown, following the instructions, accordingly. ( P. 718)
●If “Transmission Fluid Temp High See Owner’s Manual” is shown, the auto-
matic transmission fluid temperature may be too high.
Immediately stop the vehicle in a safe place, shift the shift lever to P with the
engine running and wait until the message is cleared.
If the message is not cleared, contact any authorized Lexus dealer or repairer,
or another duly qualified and equipped professional.
If a message instructing to refer to the Owner’s Manual is displayed

7188-2. Steps to take in an emergency
RX350/RX200t_EE_OM48F32E
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 anotherduly qualified and equipped profes-
sional.
If your vehicle overheats
The following may indicate that your vehicle is overheating.
●The needle of the engine coolant temperature gauge (P. 96) enters the
red zone, or a loss of engine power is experienced. (For example, the vehi-
cle speed does not increase.)
●“Engine Coolant Temp High Stop in a Safe Place See Owner’s Manual” is
shown on the multi-information display.
●Steam comes out from under the hood.
Correction procedures
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7198-2. Steps to take in an emergency
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When trouble arises
RX350/RX200t_EE_OM48F32E
The coolant level is satisfactory if it is between the “FULL” and “LOW” lines on
the reservoir.
Add coolant if necessary.
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EngineIntercooler (RX200t only)
Reservoir
“FULL” line
“LOW” line
Radiator cap
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EngineIntercooler (RX200t only)
Water can be used in an emergency if coolant is unavailable.

7208-2. Steps to take in an emergency
RX350/RX200t_EE_OM48F32E
Start the engine and turn the air conditioning system on to check that the radi-
ator cooling fan operates 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 any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
Check if “Engine Coolant Temp High Stop in a Safe Place See Owner’s Man-
ual” is shown on the multi-information display.
If the message does not disappear:
Stop the engine and contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
If the message is not displayed:
Have the vehicle inspected at the nearest authorized Lexus dealer or repairer,
or another duly qualified and equipped professional.
WARNING
■To prevent an accident or injury when in specting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
●If steam is seen coming from under the h ood, do not open the hood until the steam has subsided. The engine compartment may be very hot.
●Keep hands and clothing (especially a tie, a scarf or a muffler) away from the fans andbelts. Failure to do so may cause the hands or clothing to be caught, resulting in seri- ous injury.
●Do not loosen the radiator cap and the coolant reservoir caps while the engine andradiator are hot.High temperature steam or coolant could spray out.
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7218-2. Steps to take in an emergency
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When trouble arises
RX350/RX200t_EE_OM48F32E
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.

7349-1. Specifications
RX350/RX200t_EE_OM48F32E
*: The coolant capacity is a reference quantity.
If replacement is necessary, contact any authorized Lexus dealer or repairer, or
another duly qualified an d equipped professional.
Cooling system
Capacity*
RX3509.9 L (10.5 qt., 8.7 Imp. qt.)
RX200t
Gasoline engine
8.7 L (9.2 qt., 7.7 Imp. qt.)
Intercooler
3.2 L (3.4 qt., 2.8 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 organicacid technology
Do not use plain water alone.
Ignition system (spark plug)
Make
RX350
DENSO FK20HBR8
RX200t
NGK DILFR7K9G
Gap
RX350
0.8 mm (0.03 in.)
RX200t
0.9 mm (0.04 in.)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.