Page 475 of 520

5
When trouble arises
475
5-2. Steps to take in an emergency
If your vehicle overheats
Correction proceduresStop the vehicle in a safe place and turn off the air condition-
ing system.
Check to see if steam is coming out from under the hood.
If you see steam: Stop the EV system. Carefully lift the hood after the steam
subsides and then restart the EV system.
If you do not see steam: Leave the EV system operating and carefully lift the hood.
Check to see if the cooling fans are operating.
If the fans are operating: Wait until “High Battery Temp” disappears and then stop the
EV system.
If the fans are not operating: Stop the EV system immediately and contact your Toyota
dealer.
After “High Battery Temp” disap-
pears, check the motor/traction
battery coolant level and inspect
the cooling system for leaks.
There are 2 powertrain coolant
reservoirs. Make sure to check
both of them.
If “High Battery Temp” is shown on the multi-information display, the
vehicle may be overheating.
If the message does not disappear after driving for a little while, fol-
low the correction procedu re as described below.
STEP 1
STEP 2
STEP 3
STEP 4
Page 476 of 520

476 5-2. Steps to take in an emergency
If necessary, add motor/traction
battery coolant up to the “F” or
“FULL” line.
Add after confirming the type of
coolant. (P. 357)
Water can be used in an emer-
gency if motor/traction battery
coolant is unavailable.
Have the vehicle checked at nearest Toyota dealer as soon as possi-
ble.
STEP 5
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 motor compartment may be very hot, caus-
ing serious injury such as burns.
● Check that the indicator on the “POWER” switch and the “READY” indica-
tor are off.
● When the “READY” indicator is illuminated, the cooling fans may su\
ddenly
start to operate. Do not touch or approach the fans. Doing so may lead to
fingers, clothes or tools getting caught, resulting in an accidental injury.
● Do not loosen the coolant reservoir cap while the EV system and radiator
are hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
NOTICE
■When adding motor/traction battery coolant
Wait until the EV system has cooled down before adding motor/traction bat-
tery coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot EV system
too quickly can cause damage to the EV system.
Page 485 of 520
485
6-1. Specifications
6
Vehicle specifications
Cooling system
■ Motor coolant/traction battery coolant
■ Heater coolant
*1: The capacity is a reference quantity. If replacement is necessary, contact
your Toyota dealer.
*
2: The dilution ratio for both “Zerex G 48” and “Glysantin G 48” is 50% coolant and 50% deionized water.
Capacity (Reference)*1
Motor coolant
6.1 qt. (5.8 L, 5.1 Imp. qt.)
Traction battery coolant
8.2 qt. (7.8 L, 6.9 Imp. qt.)
Coolant type “Zerex G 48” or “Glysantin G 48” only *2
Capacity (Reference)*11.6 qt. (1.5 L, 1.3 Imp. qt.)
Coolant type Use either of the following:
• “Toyota Super Long Life Coolant”
• A similar high-quality ethylene glycol-based non-silicate, non-amine, non-nitrite,
and non-borate coolant with long-life
hybrid organic acid technology
Do not use plain water alone.
Page 510 of 520

510 Alphabetical index
How to charge your vehicle .....53
High voltage components........32
Information related to charging display ....................74
Maintenance............................92
Power sources precautions .....52
Power sources that can be used ......................................50
Pre-Climate .............................53
Remote Climate Control ..........................53, 277
Safety functions.................48, 82
When charging cannot be carried out .............................88
Charging port door ....................46
Charging station information ............................. 520
Child restraint system Booster seats, definition ........ 172
Booster seats, installation ..... 176
Convertible seats, definition ............................. 172
Convertible seats,
installation ........................... 176
Front passenger occupant classification system ........... 166
Infant seats, definition ........... 172
Infant seats, installation......... 176
Installing CRS with a top tether strap.......................... 183
Installing CRS with LATCH anchors .................. 178
Installing CRS with seat belts .................................... 180
Child safety
Airbag precautions ................161
Child restraint system............ 172
Child-protectors ..................... 111
How your child should wear the seat belt ........................ 135
Installing child restraints ........ 176
Power window lock switch..... 146
Power window precautions ...148 Removed key battery
precautions ......................... 384
Seat belt extender precautions ......................... 138
Seat belt precautions ............ 136
Seat heater precautions ........ 312
12-volt battery precautions ................. 363, 473
Child-protectors ....................... 111
Cleaning Exterior.................................. 334
Interior ................................... 337
Seat belts .............................. 338
Coat hooks ............................... 314
Condenser ................................ 360
Console box ............................. 298
Cooling system
Overheating .......................... 475
Cruise control .......................... 243
Cup holders .............................. 299
Curtain shield airbags ............. 154
Customizable features ............ 500
Daytime running light system .................................... 236
Daytime running lights Replacing light bulb............... 400
Switch ................................... 234
Defogger Rear window ......................... 292
Side mirrors........................... 292
Dimensions .............................. 482
Dinghy towing .......................... 274
Display Multi-information display ....... 227
Trip information ..................... 227
Do-it-yourself maintenance .... 346
Door courtesy lights
Door courtesy lights .............. 293
Wattage................................. 488
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