2019 TOYOTA PRIUS PLUS coolant temperature

5187-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
If your vehicle overheats
■If the high coolant temperature warning light comes on or
flashes
Stop the vehicle in a safe place and turn off the air conditioning
system, 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 radiator core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact
any authorized Toyota retailer
or Toyota authorized repairer,
or any reliable repairer.
The following may indicate that your vehicle is overheating.
● The high coolant temperature warning light (P. 449) comes on
or flashes, or a loss of hybrid system power is experienced. (For
example, the vehicle speed does not increase.)
● Vehicles without multi-information display: The hybrid system
overheat warning light ( P. 449) comes on.
● Vehicles with multi-information display: The warning message
indicating overheat is shown on the multi-information display.
( P. 464)
● Steam comes out from under the hood.
Correction procedures
1
2
3
1
2

5197-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
7
When trouble arises
The coolant level is satisfactory if it is between the “FULL” and
“LOW” lines on the reservoir.
Reservoir
“FULL” line
“LOW” line
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 fans operate and to check for
coolant leaks from the radiator or hoses.
The fans operate when the air condi tioning system is turned on immedi-
ately 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 con-
ditioning system on and off repeatedly. (The fans may not operate in
freezing temperatures.)
If the fans are not operating:
Stop the hybrid system immediately and contact any authorized
Toyota retailer or Toyota authorized repairer, or any reliable
repairer.
If the fans are operating:
Have the vehicle inspected at the nearest any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
4
1
2
3
5
6
7

5217-2. Steps to take in an emergency
PRIUS +_OM_OM47D30E_(EE)
7
When trouble arises
After stopping the hybrid system and waiting for 5 minutes or
more, start the hybrid system and check for the instrument clus-
ter or multi-information display.
If the hybrid system overheat warning light does not turn off or
the message does not disappear:
Stop the hybrid system and contact any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
If the hybrid system overheat warning light does not come on or
the message is not displayed:
The hybrid system temperature has dropped and the vehicle may
be driven normally.
However, if the warning light comes on again frequently or the message
appears again frequently, contact any authorized Toyota retailer or
Toyota authorized repairer, or any reliable repairer.
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.
● After the hybrid system has been turned off, check that the indicator on the
power switch and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automati-
cally 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 coolant reservoir cap while the hybrid system and radia-
tor are hot.
High temperature steam or coolant could spray out.
6

556Alphabetical index
PRIUS +_OM_OM47D30E_(EE)
Emergency, in case of
If a warning buzzer sounds ... 444
If a warning light turns on ...... 444
If a warning message is
displayed ............................ 458
If the 12-volt battery is
discharged .......................... 513
If the electronic key does not
operate properly ................. 511
If the hybrid system will not
start..................................... 509
If the vehicle is trapped in
rising water ......................... 436
If you have a flat tire...... 478, 492
If you lose your keys ............. 143
If you think something is
wrong .................................. 443
If your vehicle becomes
stuck ................................... 523
If your vehicle has to be
stopped in an emergency ... 435
If your vehicle needs to be
towed .................................. 437
If your vehicle overheats ....... 518
Energy monitor ........................ 134Engine
Accessory mode ................... 227
Compartment ........................ 379
Engine switch........................ 224
Exhaust gas precautions ........ 80
Hood ..................................... 375
How to start the hybrid
system ................................ 224
Identification number ............ 528
If the hybrid system will not
start .................................... 509
If your vehicle has to be
stopped in an emergency ... 435
Ignition switch
(power switch) .................... 224
Overheating .......................... 518
Power switch......................... 224
Engine coolant
Capacity ................................ 532
Checking ............................... 385
Preparing and checking
before winter....................... 327
Engine coolant temperature
warning light .......................... 449

561Alphabetical index
PRIUS +_OM_OM47D30E_(EE)
Navigation system*
Odometer .................................. 119
Oil
Engine oil .............................. 529
Opener
Fuel filler door ....................... 258
Hood ..................................... 375
Outside rear view mirrors ....... 206
Adjustment ............................ 206
Folding .................................. 206
Outside rear view mirror
defoggers............................ 335
Outside temperature
display .................................... 337
Overhead console.................... 349
Overheating .............................. 518
Overheating, Engine ................ 518
P position switch ..................... 234
Parking brake
Operation .............................. 240
Parking brake engaged
warning buzzer ................... 451
Parking lock ............................. 234
PCS (Pre-Crash Safety system)
Function ................................ 271
Warning light ......................... 446
Warning message ......... 463, 465Personal lights ......................... 342
Switch ................................... 343
Wattage ................................ 536
Pollen removal mode .............. 335
Power control unit coolant
Capacity ................................ 532
Checking ............................... 385
Preparing and checking
before winter....................... 327
Radiator ................................ 386
Power outlets ........................... 356
Power steering (Electric
Power Steering system) ....... 318
Warning light ......................... 445
Power switch............................ 224
Auto power off function ......... 228
Changing the power
switch modes...................... 227
If your vehicle has to be
stopped in an emergency ... 435
Starting the hybrid
system ................................ 224
Power switch light ................... 342
Power windows
Jam protection function......... 208
Operation .............................. 208
Window lock switch............... 208
Pre-Crash Safety system (PCS)
Function ................................ 271
Warning light ......................... 446
Warning message ......... 463, 465
N
O
P
*: Refer to the “Navigation and multimedia system Owner’s Manual”.

566Alphabetical index
PRIUS +_OM_OM47D30E_(EE)
Warning lights
ABS ....................................... 445
Automatic headlight leveling
system ................................ 449
Brake Override System ......... 213
Brake system ........................ 444
Charging system ................... 444
Cruise control ........................ 449
Drive-Start Control ................ 213
Driver’s seat belt reminder .... 450
Electronic engine control
system ................................ 445
Electric power steering.......... 445
Front passenger’s seat belt
reminder ............................. 450
Go to service ......................... 451
High coolant temperature...... 449
Hybrid battery indicator ......... 448
Hybrid system ....................... 445
Hybrid system overheat ........ 449
LED headlight ....................... 448
Low engine oil pressure ........ 445
Low fuel level ........................ 449
Low hybrid battery
(traction battery) ................. 449
Malfunction indicator lamp .... 445
Master warning light .............. 450
Open door ............................. 449
Parking lock system ...... 447, 448
P position request
indicator .............................. 448
PCS....................................... 446
Rear passenger’s seat belt
reminder ............................. 450
Seat belt reminder light ......... 450
Slip indicator ......................... 446
SRS....................................... 445
Tire pressure ......................... 450Warning messages .................. 458
Washer
Checking ............................... 387
Preparing and checking
before winter....................... 327
Switch ........................... 251, 255
Washing and waxing ............... 362
What to do if...
(Troubleshooting) ................. 548
Wheels ...................................... 411
Replacing wheels.................. 478
Size ....................................... 535
Window glasses....................... 208
Window lock switch ................ 208
Windows
Power windows ..................... 208
Rear window defogger .......... 335
Washer ......................... 251, 255
Windshield wipers ................... 251
Winter driving tips ................... 327
Wireless communication
*
Wireless remote control
key .......................................... 140
Locking/Unlocking................. 140
Replacing the battery ............ 417
WMA disc
*