2014 TOYOTA PRIUS PLUG-IN HYBRID coolant temperature

263
2-2. Instrument cluster
PRIUS PHV_OM_OM47856U_(U)
2
When driving
CAUTION
■
To prevent an accident
NOTICE
■To prevent damage to the engine and its components
The engine may be overheating if the high coolant temperature warning light
comes on or flashes. In this case, immediately stop the vehicle in a safe
place, and check the engine after it has cooled completely. ( P. 603)
Do not place anything or attach a sticker
in front of the instrument cluster. The item
may obscure or obstruct the display, or
could reflect off the display, possibly
causing an accident.Instrument cluster

468 4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47856U_(U)
■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% cool- ant and 50% deionized water. (Minimum temperature: -31 F
[-35 C])
Canada: “Toyota Super Long Life Coolant” is a mixture of 55% cool- ant and 45% deionized water. (Minimum temperature: -44 F
[-42 C])
For more details about coolant, contact your Toyota dealer.
■ If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine/power control unit coolant reser-
voir caps, drain cock and water pump.
If you cannot find a leak, have your Toyota dealer test the cap and check for
leaks in the cooling system.
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 serious injuries, such as burns.

536 5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47856U_(U)
Stop the vehicle immediately.The following warning indicates the possibility of damage to the vehi-
cle that may lead to an accident. Immediately stop the vehicle in a
safe place and contact your Toyota dealer.
Warning lightWarning light/Details
Charging system warning light Indicates a malfunction in the vehicle’s charging system
High coolant temperature warning light Indicates that the coolant temperature is too high
Changes from a flashing to a solid light when the engine
coolant temperature increases.

5
When trouble arises
603
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47856U_(U)
If your vehicle overheats
Correction procedures■ If the high coolant temperatur e warning light comes on or
flashes
Stop the vehicle in a safe place and turn off the air condition-
ing 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 your Toyota
dealer.
The following may indicate that your vehicle is overheating.
●The high coolant temperature warning light ( P. 536) comes on
or flashes, or a loss of hybrid system power is experienced. (For
example, the vehicle s peed does not increase.)
● “HYBRID SYSTEM OVERHEAT” ( P. 554) is shown on the
multi-informat ion display.
● Steam comes out from under the hood.
1 ÉTAPE
2 ÉTAPE
STEP 3

604 5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47856U_(U)
The coolant level is satisfactory if
it is between the “FULL” and
“LOW ” lines on the reservoir.Reservoir
“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 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 hybrid system im mediately and contact your
Toyota dealer.
If the fans are operating: Have the vehicle inspected at the nearest Toyota dealer.
ITO43P111
STEP 4
ITO52P130
STEP 5
6 ÉTAPE
STEP7

682 Alphabetical index
PRIUS PHV_OM_OM47856U_(U)
Tonneau cover ......................... 406
Tools ......................................... 451
Total load capacity................... 350
Touch tracer display ................260
TowingDinghy towing........................ 357
Emergency towing................. 528
Trailer towing......................... 356
TRAC ......................................... 330
Traction control........................ 330
Trailer towing ........................... 356
Transmission
Hybrid transmission............... 247
P position switch ................... 250
Trip information ....................... 276
Trip meter ................................. 259
Turn signal lights Replacing light bulbs ............. 510
Switch.................................... 256
Wattage ................................. 624
USB port
*................................. 383
Vanity lights Vanity lights ........................... 395
Wattage ................................. 624
Vanity mirrors........................... 395
Vehicle data recordings ............24
Vehicle identification number ................................... 615
Vehicle proximity notification system ......................................38
Vehicle stability control........... 330
VSC............................................ 330 Warning buzzers
Brake system ........................ 535
Open door ............................ 539
Seat belt reminder................. 539
Warning lights Anti-lock brake system
(ABS) .................................. 537
Automatic headlight leveling system ................................ 538
Brake system ................ 535, 538
Charging system .... ............... 536
Cruise control ........................ 538
Electric power steering
system ................................ 537
High coolant temperature...... 536
Hybrid system ....................... 537
Low fuel level ........................ 539
Low tire pressure .................. 540
Malfunction indicator lamp .... 537
Open door ............................. 539
Pre-collision system .............. 538
Radar cruise control. ............. 538
Seat belt warning light........... 539
Slip indicator ......................... 538
SRS airbags .......................... 537
Tire pressure warning light.... 540U
V
W

684
PRIUS PHV_OM_OM47856U_(U)
What to do if...
What to do if...
A tire puncturesP. 569If you have a flat tire
The hybrid system does not start
P. 591If the hybrid system will not start
P. 183Immobilizer system
P. 597If the 12-volt battery is
discharged
The high coolant temperature
warning light flashes or comes on
“HYBRID SYSTEM OVERHEAT”
is displayed
Steam can be seen coming
from under the hood
P. 603If your vehicle overheats
The key is lostP. 593If you lose your keys
The 12-volt battery runs outP. 597If the 12-volt battery is
discharged
The doors cannot be lockedP. 138Side doors
P. 144Back door
The vehicle is stuck in mud or
sandP. 608If the vehicle becomes stuck
A warning light or indicator
light comes onP. 535If a warning light turns on or a
warning buzzer sounds

685
What to do if...
PRIUS PHV_OM_OM47856U_(U)
■
Warning lights
P. 540
or
P. 537
or
P. 535P. 537
P. 536P. 538
P. 536P. 538
P. 538
or
P. 537P. 538
P. 537P. 538
Master warning light ABS warning light
Brake system warning
light (red indicatorF
Electric power steering
system warning light
Charging system
warning lightPre-collision system
warning light
G
High coolant
temperature warning
lightSlip indicator light
Brake system warning
light (yellow indicator)Malfunction indicator
lamp
Automatic headlight
leveling system
warning light
SRS warning lightCruise control indicator
light
G