2013 Lexus ES300h cooling

8087-2. Steps to take in an emergency
ES350 300h_OM_OM33A01U_(U)
CAUTION
■12-volt battery precautions
The 12-volt battery contains poisonous and corrosive acidic electrolyte, while
related parts contain lead and lead compounds. Observe the following precau-
tions when handling the 12-volt battery:
●When working with the 12-volt 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 12-volt battery.
●In the event that battery fluid comes into contact with the skin or eyes, immedi-
ately wash 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
battery-related parts.
●Do not allow children near the 12-volt 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.

8147-2. Steps to take in an emergency
ES350 300h_OM_OM33A01U_(U)
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 radiator cooling fan operates and to check for coolant leaks from
the radiator or hoses.
The fan operates when the air conditioning system is turned on immediately after
a cold start. Confirm that the fan is 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 fan is not operating:
Stop the engine immediately and contact your Lexus dealer.
If the fan is operating:
Have the vehicle inspected at the nearest Lexus dealer.
5
CAUTION
■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 fan
and belts. Failure to do so may cause the hands or clothing to be caught, resulting
in serious injury.
●Do not loosen the radiator cap while the engine and radiator are hot.
High temperature steam or coolant could spray out.
6
7

8157-2. Steps to take in an emergency
ES350 300h_OM_OM33A01U_(U)
7
When trouble arises
NOTICE
■When adding engine coolant
Add coolant slowly after the engine has cooled 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 commercially available coolant additives.

816
ES350 300h_OM_OM33A01U_(U)
7-2. Steps to take in an emergency
If your vehicle overheats (hybrid vehicles)
■If the needle of the engine coolant temperature gauge enters the red
zone
Stop the vehicle in a safe place and turn off the air conditioning sys-
tem, and then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has
cooled down sufficiently,
inspect the hoses and cooling
system for leaks.
If a large amount of coolant leaks,
immediately contact your Lexus
dealer.
The following may indicate that your vehicle is overheating.
●The needle of the engine coolant temperature gauge ( →P. 9 3 )
enters the red zone or a loss of hybrid system power is experienced.
(For example, the vehicle speed does not increase.)
●“Hybrid System Overheat” ( →P. 772) is shown on the multi-informa-
tion display.
●Steam comes out from under the hood.
Correction procedures
1
2
3

8177-2. Steps to take in an emergency
ES350 300h_OM_OM33A01U_(U)
7
When trouble arises
The coolant level is satisfactory
if it is between the “FULL” and
“LOW” line on the reservoir.Reservoir cap
“FULL”
“LOW”
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and turn the air conditioning system on to
check that the radiator cooling fan operates and to check for coolant
leaks from the radiator or hoses.
The fan operates when the air conditioning system is turned on immediately
after a cold start. Confirm that the fan is 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 fan is not operating:
Stop the hybrid system immediatel y and contact your Lexus dealer.
If the fan is operating:
Have the vehicle inspected at the nearest Lexus dealer.
4
1
2
3
5
6
7

8197-2. Steps to take in an emergency
ES350 300h_OM_OM33A01U_(U)
7
When trouble arises
CAUTION
■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.
●Check that the indicator on the “POWER” switch and the “READY” indicator are
off.
●On hybrid vehicles, the gasoline engine may automatically start, or the cooling
fan may suddenly operate even if the gasoline engine stops. Do not touch or
approach rotating parts such as the fan, which may lead to fingers or clothing
(especially a tie, a scarf or a muffler) getting caught, resulting in serious injury.
●Do not loosen the radiator cap while the hybrid system and radiator are hot.
High temperature steam or coolant could spray out.
NOTICE
■When adding engine/power control unit coolant
Add coolant slowly after the hybrid system has cooled down sufficiently. Adding
cool coolant to a hot hybrid system too quickly can cause damage to the hybrid
system.
■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 commercially available coolant additives.

ES350 300h_OM_OM33A01U_(U)
8318-1. Specifications
8
Vehicle specifications
XGasoline vehicles
XHybrid vehicles
Cooling system
Capacity9.7 qt. (9.2 L, 8.1 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-
nology
Do not use plain water alone.
Capacity
Gasoline
engine 7.6 qt. (7.2 L, 6.3 Imp.qt.)
Po w e r
control unit3.4 qt. (3.2 L, 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 organic acid tech-
nology
Do not use plain water alone.

890Alphabetical index
ES350 300h_OM_OM33A01U_(U)
CareAluminum wheels ............................... 651
Exterior................................................... 650
Interior .................................................... 654
Seat belts ............................................... 655
Cargo capacity........................................194
Cargo hooks ............................................612
CD player
*................................. 394, 505
Chains ....................................................... 328
Child restraint system Booster seats, definition ....................55
Booster seats, installation..................65
Convertible seats, definition ............55
Convertible seats, installation ......... 62
Front passenger occupant
classification system .........................49
Infant seats, definition ..........................55
Infant seats, installation ....................... 62
Installing CRS
with LATCH anchors .....................60
Installing CRS with seat belts .......... 62
Installing CRS with top tether strap .........................66 Child safety .................................................54
12-volt battery
precautions ..........................687, 808
Airbag precautions................................ 41
Child restraint system......................... 55
How your child should wear
the seat belt .......................................... 34
Installing child restraints .................... 59
Moon roof precautions .................... 177
Power window lock switch.............170
Power window precautions ........... 172
Rear door child-protectors ............140
Removed electronic key battery precautions ..................711
Seat belt extender precautions ...........................................37
Seat belt precautions ..........................58
Seat heater precautions ................... 621
Trunk precautions ............................... 147
Child-protectors ....................................140
Cleaning Aluminum wheels ................................651
Exterior .................................................. 650
Interior .....................................................654
Seat belts................................................655
Clock........................................................... 615
Coat hooks .............................................. 627
Condenser.............................................. 683
Console box........................................... 609
Console box light ................................. 609
Consumption screen ............................. 115
Cooling system
Engine overheating ........................... 813
Hybrid system overheating ........... 816
Cruise control Cruise control ..................................... 244
Dynamic radar cruise control ..... 248
C