2017 Lexus IS200t coolant temperature

5037-3. Do-it-yourself maintenance
7
Maintenance and care
IS200t_EE(OM53D77E)
■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.Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the “LOW”
line, add coolant up to the “FULL”
line. ( P. 622)
■Intercooler coolant reservoir
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. 622)
■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.
“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 retailer or Lexus autho-
rized repairer, or any reliable repairer.
■If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine coolant reservoir cap, drain cock and water
pump.
If you cannot find a leak, have any authorized Lexus retailer or Lexus authorized repairer,
or any reliable repairer, test the cap an d check for leaks in the cooling system.
Coolant
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5528-2. Steps to take in an emergency
IS200t_EE(OM53D77E)
●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 feeling, pedal almost touches the floor
If you think something is wrong
If you notice any of the following sy mptoms, your vehicle probably needs
adjustment or repair. Contact any authorized Lexus retailer or Lexus autho-
rized repairer, or any reliable repairer as soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

5678-2. Steps to take in an emergency
8
When trouble arises
IS200t_EE(OM53D77E)
Indicates a malfunction in:
• The SRS airbag system; or
• The seat belt pretensioner systemA buzzer also sounds.
 Have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable
repairer.
Indicates a malfunction in:
•The ABS; or
• The brake assist system
A buzzer also sounds.
 Have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable
repairer.
Indicates that the engine coolant temperature is too high
A buzzer also sounds.
 P. 622
Warning messageDetails/Actions

6228-2. Steps to take in an emergency
IS200t_EE(OM53D77E)
●The needle of the engine coolant temperature gauge (P. 93) enters the red
zone or a loss of engine power is experienced. (For example, the vehicle
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.
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 retailer or Lexus authorized
repairer, or any reliable repairer.
If your vehicle overheats
The following may indicate that your vehicle is overheating.
Correction procedures
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6248-2. Steps to take in an emergency
IS200t_EE(OM53D77E)
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 fans may not operate in freezing temperatures.)
If the fans are not operating:
Stop the engine immediately and contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.
If the fans are operating:
Have the vehicle inspected at the nearest authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.
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 author ized Lexus retailer or Lexus autho-
rized repairer, or any reliable repairer.
If the message is not displayed:
Have the vehicle inspected at the nearest authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.
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6258-2. Steps to take in an emergency
8
When trouble arises
IS200t_EE(OM53D77E)
WARNING
■When inspecting 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 hood, 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 and
belts. Failure to do so may cause the hands or clothing to be caught, resulting in seri-
ous injury.
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.
●Do not loosen the coolant reservoir cap or
intercooler cap while the engine and radiator
are hot.
High temperature steam or coolant could
spray out.

660Alphabetical index
IS200t_EE(OM53D77E)
E-mail .......................................................... 413
Eco drive mode .................................... 338
Eco Driving Indicator .............................113
Elapsed time .............................................. 116
Electric Power Steering (EPS)........340Warning light ...................................... 555
Electronic key...........................................122
Battery-saving function..................... 142
If the electronic key does not operate properly ............................. 615
Replacing the battery....................... 527
Emergency, in case of If a warning message is
displayed ........................................... 560
If the electronic key does not
operate properly ............................. 615
If the engine will not start .................613
If the vehicle battery is discharged.......................................... 618
If the warning buzzer sounds ......554
If the warning light turns on ..........554
If you have a flat tire .............. 586, 601
If you think something is wrong...............................................552
If your vehicle becomes stuck..... 626
If your vehicle has to be stopped in an emergency..........545
If your vehicle needs to be towed.............................................546
If your vehicle overheats ................ 622 Emergency brake signal......................341
Emergency flashers ............................. 544
Emergency tire puncture
repair kit ................................................ 586
Engine ....................................................... 632 ACCESSORY mode ..................... 205
Compartment ..................................... 499
Engine switch ...................................... 204
Hood ....................................................... 497
How to start the engine ................. 204
Identification number......................... 631
If the engine will not start ................. 613
Ignition switch (engine switch) ... 204
Overheating .........................................622
Engine coolant....................................... 503 Capacity................................................. 635
Checking ............................................... 503
Preparing and checking
before winter.................................... 346
Engine coolant temperature
gauge ........................................................ 93
Engine immobilizer system ..................75
Engine oil .................................................500 Capacity................................................. 633
Checking .............................................. 500
Preparing and checking
before winter.................................... 346
Engine oil maintenance data ........... 502
Engine switch ......................................... 204
EPS (Electric Power Steering) ....... 340
Warning light.......................................555
ERA-GLONASS .................................480
E