2017 Lexus IS350 radiator

4717-3. Do-it-yourself maintenance
7
Maintenance and care
IS350/300/200t_U (OM53D76U)
Check the radiator, condenser and intercooler radiator (if equipped) and clear
away any foreign objects.
If any of the above parts are extremely dirt y or you are not sure of their condition,
have your vehicle inspecte d by your Lexus dealer.
Radiator, condenser and intercooler radiator (if equipped)
WARNING
■When the engine is hot
Do not touch the radiator, condenser or inte rcooler radiator (if equipped) as they may
be hot and cause serious injuries, such as burns.

5668-2. Steps to take in an emergency
IS350/300/200t_U (OM53D76U)
●The needle of the engine coolant temperature gauge ( →P. 79) 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 tu rn 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, insp ect the hoses and
radiator core (radiator) for any
leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Lexus
dealer.
If your vehicle overheats
The following may indicate that your vehicle is overheating.
Correction procedures
1
2
3
1
2

5688-2. Steps to take in an emergency
IS350/300/200t_U (OM53D76U)
Add coolant if necessary.
Water can be used in an emergency if coolant is unavailable.
Start the engine and turn the air conditio ning 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 an d contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Lexus dealer.
Check if “Engine Coolant Temp High St op 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 your Lexus dealer.
If the message is not displayed:
Have the vehicle inspected at the nearest Lexus dealer.
5
Engine (IS350/IS300)Engine (IS200t)
Intercooler (IS200t)
6
7
8

5698-2. Steps to take in an emergency
8
When trouble arises
IS350/300/200t_U (OM53D76U)
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 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 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 foreig n matter (such as sand or dust etc.).
●Do not use any coolant additive.
●IS350/IS300: Do not loosen the coolant res-
ervoir caps or radiator cap while the engine
and radiator are hot. (The radiator cap is
located under the engine cover.)
High temperature steam or coolant could
spray out.
●IS200t: Do not loosen the coolant reservoir
cap or intercooler reservoir cap while the
engine and radiator are hot.
High temperature steam or coolant could
spray out.

641Alphabetical index
IS350/300/200t_U (OM53D76U)
Paddle shift switches ............................. 179
Parking assist sensors (intuitive parking assist) .................. 248
Parking brake.......................................... 186
Parking lights ........................................... 188 Light switch ............................................188
Replacing light bulbs ....................... 502
PCS (Pre-Collision System) .............. 214 Warning light ........................................ 517
Personal lights..........................................413 Wattage ................................................. 586
Pop-up display .......................................... 92
Power easy access system .................134
Power outlet ........................................... 422
Power steering (Electric power steering system)................................. 290 Warning light ........................................ 517
Power windows .......................................149 Door lock linked window operation ............................. 151
Jam protection function ................... 150
Operation ............................................... 149
Window lock switch.......................... 149
Pre-Collision System (PCS) .............. 214 Warning light ........................................ 517 Radar cruise control (dynamic
radar cruise control).........................236
Radiator...................................................... 471
Radio ..........................................................326
Rear passengers’ seat belt reminder lights .....................................518
Rear personal lights .............................. 413 Wattage ................................................ 586
Rear seats .................................................. 132 Fold down the seatback................... 132
Luggage security system.................. 118
Rear sunshade........................................423 Operation.............................................. 423
Reverse operation feature ............ 423
Rear turn signal lights ........................... 184 Replacing light bulbs ...................... 500
Turn signal lever ...................................184
Wattage ................................................ 586
Rear view mirror Inside rear view mirror...................... 144
Outside rear view mirrors ..............146
Rear window defoggers .................... 406
Refueling.................................................. 203 Capacity................................................. 576
Fuel types............................................... 576
If the fuel filler door cannot be opened .........................205
Opening the fuel tank cap ............205
PR