2011 Lexus HS250h radiator

435
4-3. Do-it-yourself maintenance
4
Maintenance and care
Power control unit coolant reservoirReservoir cap
“FULL” line
“LOW” line
If the level is on or below the
“LOW” line, add coolant up to the
“FULL” line. (P. 5 6 0 )
■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 coolant, contact your Lexus dealer.
■If the coolant level drops within a short time of replenishing
Visually check the radiators, hoses, engine/power control unit 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 systems.

436
4-3. Do-it-yourself maintenance
Radiator and condenserCheck the radiator and condenser an d clear away any foreign objects.
If either of the above parts is extremely dirty or you are not sure of their
condition, have your vehicle inspected by your Lexus dealer.
CAUTION
■When the hybrid system is hot
Do not remove the engine/power control unit coolant reservoir caps.
The cooling system may be under pressure and may spray hot coolant if the cap is
removed, causing burns or other injuries.
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 cooling. 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.
CAUTION
■When the hybrid system is hot
Do not touch the radiators or condense r as they may be hot and cause burns.

5
When trouble arises
551
5-2. Steps to take in an emergency
CAUTION
■To prevent an accident or injury when inspecting under the hood of your vehicle
●If steam is seen coming from under the hood, do not open the hood until the
steam has subsided. The engine compartm ent may be very hot, causing serious
injuries such as burns.
●Check that the indicator on the “POWER ” switch and the READY indicator are
off.
●For vehicles with a hybrid system, there are times when the gasoline engine auto-
matically starts to run or the cooling fans suddenly start to operate. Do not touch
or approach the rotating parts of the belt or fans. Doing so may lead to fingers,
clothes or tools getting caught, resulting in injury.
●Do not loosen the coolant reservoir cap wh ile the hybrid system and radiator are
hot.
Serious injuries, such as burns, may re sult from hot coolant and steam released
under pressure.
NOTICE
■When adding engine/power control unit coolant
Wait until the hybrid system has cooled down before adding engine/power control
unit coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid system too
quickly can cause damage to the hybrid system.

618
Alphabetical index
Outside rear view mirror defogger switch (vehicles
without navigation system) ............ 264
Outside rear view mirror defogger switch (vehicles
with navigation system)*
Outside temperature display.............172
Overhead console ............................... 374
Overheating, Engine.......................... 548
Overheating, Hybrid system .......... 548
Parking brake .......................................... 162
Parking lights Replacing light bulbs........................ 475
Switch ....................................................... 186
Wattage..................................................564
PCS ............................................................ 236
Personal lights Personal lights .....................................365
Switch ......................................................365
Wattage..................................................564
Power easy access system................... 66
Power outlet............................................378
Power switch ............................................147
Power windows ........................................ 87
Pre-collision system............................. 236 Radar cruise control............................208
Radiator .................................................... 436
Radio (vehicles without navigation
system).................................................. 269
Radio (vehicles with navigation system)*
Radio data system (vehicles without navigation system) .............................. 271
Radio data system (vehicles with navigation system)*
RDS (vehicles without navigation system)..................................................... 271
RDS (vehicles with navigation system)*
Rear side marker lights Replacing light bulbs ....................... 485
Wattage ................................................. 564
Rear sunshade ....................................... 382
Rear turn signal lights Replacing light bulbs ........................476
Wattage ................................................. 564
Rear view mirror Compass ............................................... 396
Rear view monitor system*
Rear window defogger (vehicles without navigation system)............ 264
Rear window defogger (vehicles with navigation system)*
Remote Touch*
P
R