
3957-2. Steps to take in an emergency
PRIUS +_OM_OM47B16E_(EE)
7
When trouble arises
Insufficient 12-volt battery charge The parking lock mechanism may not function.
The hybrid system may not be able to start.
The power switch may not be able to be turned
off. In this case, the power switch may be
turned off by applying the parking brake.
After charging the 12-volt battery, the message
may continue to be displayed until the shift
position is changed from P.
A buzzer also sounds.
→ When parking, choose a level location and
apply the parking brake securely.
→ Maintain the hybrid system operation state
for approximately 15 minutes or more to
recharge the 12-volt battery.
→ The hybrid system will not start: Start the
hybrid system by following the “If the
12-volt battery is discharged” procedure
(→ P. 439).
→ If the message does not disappear: The
12-volt battery may be deteriorating.
The 12-volt battery may be discharged if
this continues. Have the 12-volt battery
inspected at your Toyota dealer.
Shift control system malfunction
A buzzer also sounds.
→ Have the vehicle inspected by any autho-
rized Toyota dealer or repairer, or another
duly qualified and equipped professional.
• The hybrid system may not be able to start.
• The parking lock mechanism may not func-
tion. When parking, choose a level location
and apply the parking brake securely.
• The power switch may not be able to be turned off. In this case, the power switch
may be turned off by applying the parking
brake.
Shift control system malfunction A buzzer also sounds.
→ Have the vehicle inspected by any autho-
rized Toyota dealer or repairer, or another
duly qualified and equipped professional
immediately. If not inspected, vehicle sys-
tems may stop operating normally.
Warning messageDetails/Actions

4417-2. Steps to take in an emergency
PRIUS +_OM_OM47B16E_(EE)
7
When trouble arises
Start the engine of the second vehicle. Increase the engine speed
slightly and maintain at that level for approximately 5 minutes to
recharge the 12-volt battery of your vehicle.
Maintain the engine speed of the second vehicle and start the
hybrid system of your vehicle by turning the power switch to ON
mode.
Make sure the “READY” indicator comes on. If the indicator light
does not come on, contact any authorized Toyota dealer or repairer,
or another duly qualified and equipped professional.
Once the hybrid system has started, remove the jumper cables in
the exact reverse order from which they were connected.
Close the exclusive jump starting terminal cover, and reinstall the
fuse box cover to its original position.
When installing, first hook the fuse box cover onto the two rear tabs.
Once the hybrid system starts, have the vehicle inspected at any
authorized Toyota dealer or repairer, or another duly qualified and
equipped professional as soon as possible.
■Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
■ To prevent 12-volt battery discharge
●Turn off the headlights and the audio system while the hybrid system is off.
● Turn off any unnecessary electrical components when the vehicle is running
at a low speed for an extended period, such as in heavy traffic.
■ When the 12-volt battery is removed or discharged
●The hybrid system may not start. ( →P. 328)
● If the 12-volt battery discharges while the shift position is in P, it may not be
possible to shift the shift position to other positions. In this case, the vehicle
cannot be towed without lifting both front wheels because the front wheels
will be locked. ( →P. 370)
● When the 12-volt battery is reconnected, start the hybrid system and con-
firm that the shift position can be changed to each position using the shift
position indicator.
● Make sure that the key is not inside the vehicle when recharging or replac-
ing the 12-volt battery. The key may be locked in the vehicle if the alarm is
activated. ( →P. 97)
4
5
6
7
8

4427-2. Steps to take in an emergency
PRIUS +_OM_OM47B16E_(EE)■
Charging the 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even when
the vehicle is not in use, due to natural discharge and the draining effects of
certain electrical appliances. If the vehicle is left for a long time, the 12-volt
battery may discharge, and the hybrid system may be unable to start. (The
12-volt battery recharges automatically while the hybrid system is operating.)
WARNING
■ Avoiding 12-volt battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flam-
mable gas that may be emitted from the 12-volt battery:
● Make sure each jumper cable is connected to the correct terminal and that
it is not unintentionally in contact with any other than the intended terminal.
● Do not allow the other end of the jumper cable connected to the “+” termi-
nal to come into contact with any other parts or metal surfaces in the area,
such as brackets or unpainted metal.
● Do not allow the + and - clamps of the jumper cables to come into contact
with each other.
● Do not smoke, use matches, cigarette lighters or allow open flame near
the 12-volt battery.
■ 12-volt battery precautions
The 12-volt battery contains poisonous and corrosive acidic electrolyte,
while related parts contain lead and lead compounds. Observe the following
precautions when handling the 12-volt battery:
●When working with the 12-volt battery , always wear safety glasses and
take care not to allow any battery fluids (acid) to come into contact with
skin, clothing or the vehicle body.
● Do not lean over the 12-volt battery.
● In the event that battery fluid comes into contact with the skin or eyes,
immediately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention
can be received.
● Always wash your hands after handling the 12-volt battery support, termi-
nals, and other battery-related parts.
● Do not allow children near the 12-volt battery.

4437-2. Steps to take in an emergency
PRIUS +_OM_OM47B16E_(EE)
7
When trouble arises
WARNING
■ After recharging the 12-volt battery
Have the 12-volt battery inspected at any authorized Toyota dealer or
repairer, or another duly qualified and equipped professional as soon as
possible.
If the 12-volt battery is deteriorating, continued use may cause the 12-volt
battery to emit a malodorous gas, which may be detrimental to the health of
passengers.
■ When replacing the 12-volt battery
→ P. 330
NOTICE
■ When handling jumper cables
When connecting the jumper cables, ensure that they do not become entan-
gled in the cooling fans, etc.
■ To prevent damaging the vehicle
The exclusive jump starting terminal is to be used when charging the 12-volt
battery from another vehicle in an emergency. It cannot be used to jump
start another vehicle.

4598-1. Specifications
PRIUS +_OM_OM47B16E_(EE)
8
Vehicle specifications
*: The fluid capacity is the quantity of reference.If replacement is necessary, contact any authorized Toyota dealer or
repairer, or another duly qualified and equipped professional.
Electrical system
12-volt battery
Open voltage at 20 °C (68 °F):
12.5 V or higher: Fully charged
11.0 — 12.4 V: Half charged
10.9 V or lower: Discharged
(Voltage is checked 30 seconds after the
hybrid system and all lights are turned off.)
Charging rates4.2 A max.
Transmission
Fluid capacity*3.4 L (3.6 qt., 3.0 Imp.qt.)
Fluid typeToyota Genuine ATF WS
NOTICE
■ Transmission fluid type
Using transmission fluid other than “Toyota Genuine ATF WS” may cause
deterioration in shift quality, locking up of your transmission accompanied
by vibration, and ultimately damage the transmission of your vehicle.

492Alphabetical index
PRIUS +_OM_OM47B16E_(EE)
USB memory*
USB port*
Vanity lightsVanity lights........................... 292
Wattage................................. 462
Vanity mirrors .......................... 292 Vanity lights........................... 292
Wattage................................. 462
Vehicle identification number ................................... 453
Vehicle Stability Control (VSC)....................................... 248
VSC (Vehicle Stability Control) .................................. 248
Warning buzzers Approach warning ................. 238
Brake system ........................ 376
Downshifting ......................... 210
Driver’s seat belt reminder .... 381
Front passenger’s seat belt reminder ............................. 381
Open door ............................. 380
Pre-crash warning ................. 254
Radar cruise control .............. 238
Seat belt reminder................. 381 Warning lights
ABS....................................... 377
Automatic headlight leveling system ................................ 380
Brake system ........................ 376
Charging system ................... 376
Cruise control........................ 380
Driver’s seat belt reminder .... 381
Electronic engine control
system ................................ 377
Electric power steering ......... 377
Front passenger’s seat belt reminder ............................. 381
Go to service......................... 382
High coolant temperature ..... 380
Hybrid battery indicator ......... 379
Hybrid system ....................... 377
Hybrid system overheat ........ 380
LED headlight ....................... 379
Low engine oil pressure ........ 377
Low fuel level ........................ 380
Low hybrid battery (traction battery) ................. 380
Malfunction indicator lamp .... 377
Master warning light.............. 381
Open door ............................. 380
Parking lock system ...... 378, 379
P position request
indicator.............................. 379
PCS ...................................... 378
Rear passenger’s seat belt
reminder ............................. 381
Seat belt reminder light ......... 381
Slip indicator ......................... 378
SRS ...................................... 377
Tire pressure......................... 381
U
V
W