Page 544 of 620
5448-2. Steps to take in an emergency
PRIUS v_OM_OM47B12U_(U)
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 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 545 of 620
5458-2. Steps to take in an emergency
PRIUS v_OM_OM47B12U_(U)
8
When trouble arises
■If the hybrid system overheat warning light comes on or the
warning message indicating overheat is shown on the multi-
information display
Stop the vehicle in a safe place.
Stop the hybrid system and carefully lift the hood.
After the hybrid system has cooled down, 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 coolant level is satisfactory if it is between the “F” and “L”
lines on the reservoir.
Reservoir
“F” line
“L” line
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
If water was added in an emer-
gency, have the vehicle
inspected at your Toyota dealer
as soon as possible.
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Page 618 of 620

618Alphabetical index
PRIUS v_OM_OM47B12U_(U)
TRAC (Traction Control)
Function ................................ 246
VSC OFF switch ................... 248
Trip information ......................... 94
Trip meters ................................. 92
Troubleshooting ...................... 600
Turn signal lights
Replacing light bulbs..... 475, 476
Turn signal lever ................... 187
Wattage ................................ 560
USB memory ............................ 303
USB port ................................... 273
Vanity lights
Vanity lights .......................... 385
Wattage ................................ 560
Vanity mirrors .......................... 385
Vanity lights .......................... 385
Wattage ................................ 560
Vehicle data recordings ............ 10
Vehicle identification
number ................................... 553
Vehicle proximity
notification system ................. 74
Vehicle Stability Control
(VSC) ...................................... 246
Voice command system.......... 358
Microphone ........................... 324
Switches ............................... 337
VSC
(Vehicle Stability Control) .... 246Warning buzzers
Approach warning................. 219
Brake system ........................ 490
Downshifting ......................... 183
Driver’s seat belt reminder.... 494
Front passenger’s seat
belt reminder ...................... 494
Lane departure ..................... 228
Open door............................. 493
Pre-collision warning ............ 253
Radar cruise control ............. 219
Seat belt reminder ................ 494
Warning lights
ABS ...................................... 491
Automatic headlight
leveling system................... 493
Brake system ........................ 490
Charging system................... 490
Cruise control ....................... 493
Driver’s seat belt
reminder ............................. 494
Electronic engine control
system ................................ 491
Electric power steering ......... 491
Front passenger’s seat
belt reminder ...................... 494
Go to service ........................ 500
High coolant temperature ..... 493
Hybrid system ....................... 490
LED headlight ....................... 492
Low engine oil pressure........ 490
Low fuel level ........................ 494
Low hybrid battery
(traction battery) ................. 493
Maintenance required
reminder ............................. 494
Malfunction indicator lamp .... 491
Master warning light ............. 494
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