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5478-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
8
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 th e radiator or hoses.
The fans operate when the air conditioning 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 your Toyota
dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Toyota dealer.
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Page 549 of 624

5498-2. Steps to take in an emergency
PRIUS v_OM_OM47B23U_(U)
8
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 your Toyota dealer.
If the hybrid system overheat wa rning 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 your Toyota dealer.
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.
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Page 611 of 624

611Alphabetical index
PRIUS v_OM_OM47B23U_(U)
If you have a flat tire ............. 524
If you lose your keys ............. 119
If you think something is wrong .............................. 491
If your vehicle becomes
stuck ................................... 551
If your vehicle has to be stopped in an
emergency.......................... 485
If your vehicle needs to be towed .................................. 486
If your vehicle overheats ....... 546
Energy monitor ................ 102, 108
Engine Accessory mode ................... 177
Compartment ........................ 428
Engine switch........................ 174
Exhaust gas precautions ........ 73
Hood ..................................... 424
How to start the hybrid system ......... ....................... 174
Identification number ............ 556
If the hybrid system will not start .............................. 537
If your vehicle has to be stopped in an
emergency.......................... 485
Ignition switch (power switch) .................... 174
Overheating .......................... 546
Power switch......................... 174 Engine coolant
Capacity................................ 559
Checking............................... 434
Preparing and checking before winter ...................... 265
Engine coolant temperature warning light.......................... 495
Engine oil
Capacity................................ 557
Checking............................... 430
Oil pressure warning light ..... 492
Preparing and checking before winter ...................... 265
Engine switch .......................... 174
Auto power off function ......... 178
Changing the power switch modes ..................... 177
If your vehicle has to be stopped in an
emergency ......................... 485
Starting the hybrid system .... 174
Engine switch light (power switch light) .............. 375
EPS (Electronic Power Steering)Function ................................ 248
Warning light......................... 493
EV indicator ............................... 96
EV drive mode ......................... 181
Event data recorder (EDR)........ 11
Exhaust gas precautions .......... 73
Page 621 of 624

621Alphabetical index
PRIUS v_OM_OM47B23U_(U)
TRAC (Traction Control)Function ................................ 248
VSC OFF switch ................... 250
Trip information ......................... 94
Trip meters ................................. 92
Troubleshooting ...................... 602
Turn signal lights Replacing light bulbs..... 478, 479
Turn signal lever ................... 189
Wattage ................................ 562
USB memory ............................ 304
USB port ................................... 277
Vanity lights Vanity lights .......................... 387
Wattage ................................ 562
Vanity mirrors .......................... 387
Vanity lights .......................... 387
Wattage ................................ 562
Vehicle data recordings ............ 10
Vehicle identification
number ................................... 555
Vehicle proximity notification system ................. 75
Vehicle Stability Control (VSC) ...................................... 248
Voice command system.......... 358
Microphone ........................... 324
Switches ............................... 337
VSC
(Vehicle Stabilit y Control) .... 248 Warning buzzers
Approach warning................. 221
Brake system ....... ................. 492
Downshifting ......................... 185
Driver’s seat belt reminder.... 496
Front passenger’s seat belt reminder ...................... 496
Lane departure ..................... 230
Open door............................. 495
Pre-collision warning ............ 255
Radar cruise control ............. 221
Seat belt reminder ................ 496
Warning lights ABS ...................................... 493
Automatic headlight
leveling system................... 495
Brake system ....... ................. 492
Charging system................... 492
Cruise control ....................... 495
Driver’s seat belt reminder ............................. 496
Electronic engine control system .......... ...................... 493
Electric power steering ......... 493
Front passenger’s seat belt reminder ...................... 496
Go to service ........................ 502
High coolant temperature ..... 495
Hybrid system ...... ................. 492
LED headlight ....................... 494
Low engine oil pressure........ 492
Low fuel level ........................ 496
Low hybrid battery
(traction battery) ................. 495
Maintenance required reminder ............................. 496
Malfunction indicator lamp .... 493
Master warning light ............. 496
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