Page 476 of 596
4768-2. Steps to take in an emergency
PRIUS c_U (OM52J11U)
●Fluid leaks under the vehicle
(Water dripping from the air co nditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● is shown on the multi-information display
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the hybrid system
● Engine missing, stumbling or running roughly
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, spon gy feeling, pedal almost touches
the floor
If you think something is wrong
If you notice any of the follow ing symptoms, your vehicle proba-
bly needs adjustment or repair. Contact your Toyota dealer as
soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms
Page 478 of 596

4788-2. Steps to take in an emergency
PRIUS c_U (OM52J11U)
Warning lightWarning light/Details/Actions
Charging system warning lightIndicates a malfunction in the vehicle's charging system
→ Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.
(U.S.A.)
(Canada)
Malfunction indicator lamp Indicates a malfunction in:
• The hybrid system;
• The electronic engine control system; or
• The electronic throttle control system
→ Have the vehicle inspected by your Toyota dealer
immediately.
SRS warning light
Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system
→ Have the vehicle inspected by your Toyota dealer
immediately.
(U.S.A.)
(Canada)
ABS warning light Indicates a malfunction in:
• The ABS; or
• The brake assist system
→ Have the vehicle inspected by your Toyota dealer
immediately.
Electric power steering system warning light (warning
buzzer)
Indicates a malfunction in the EPS (Electric Power Steer-
ing) system
→ Have the vehicle inspected by your Toyota dealer
immediately.
(U.S.A.)
(Canada)Parking brake warning light (warning buzzer)*2
Indicates that the parking brake is engaged
→ Release the parking brake.
Page 487 of 596

4878-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52J11U)
Warning message and warning buzzer list
Warning messageDetails/Actions
Indicates a malfunction in the hybrid systemA buzzer sounds in accordance with the warn-
ing message that is displayed.
→ Immediately stop the vehicle in a safe place
and contact your Toyota dealer.
Indicates that the high engine coolant tempera-
ture is too high
→ Immediately stop the vehicle in a safe
place. ( →P. 524)
Indicates abnormal engine oil pressure
The warning message is shown if the engine oil
pressure is too low.
A buzzer also sounds.
→ Immediately stop the vehicle in a safe place
and contact your Toyota dealer.
(If equipped)
Indicates a malfunction in the LDA (Lane Depar-
ture Alert) system A buzzer also sounds.
→ Have the vehicle inspect ed by your Toyota
dealer.
(If equipped)
Indicates a malfunction in the PCS (Pre-Collision
System) A buzzer also sounds.
→ Have the vehicle inspect ed by your Toyota
dealer.
(Flashes)
Page 490 of 596

4908-2. Steps to take in an emergency
PRIUS c_U (OM52J11U)
(If equipped)
Indicates that the moon roof is not fully closed
(with the “POWER” switch off and the driver’s
door is open)A buzzer also sounds.
→ Close the moon roof.
Indicates that the parking brake is still engaged If the vehicle reaches a speed of 3 mph (5 km/h),
flashes and a buzzer sounds to indicate
that the parking brake is still engaged.
→ Release the parking brake.
(U.S.A. only)
Indicates that all maintenance according to the
driven distance on the maintenance schedule
*1
should be performed soon.
Comes on approximately 4500 miles (7200 km)
after the message has been reset.
→If necessary, perform maintenance.
(U.S.A. only)
Indicates that all maintenance is required to cor-
respond to the driven distance on the mainte-
nance schedule
*1.
Comes on approximately 5000 miles (8000 km)
after the message has been reset.
(The indicator will not work properly unless the
message has been reset.)
→ Perform the necessary maintenance.
Please reset the message after the mainte-
nance is performed. ( →P. 407)
Indicates that the hybrid system has overheated This message may be displayed when driving
under severe operating conditions. (For exam-
ple, when driving up a long steep hill.)
A buzzer also sounds.
→ Stop and check. ( →P. 524)
Warning messageDetails/Actions
(Flashes)
(Canada) (U.S.A.)
Page 491 of 596

4918-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52J11U)
(If equipped)
Indicates that the Automatic High Beam switch is
pressed while the headlights are in low beam.
→Turn the high beam on.
(If equipped)
Indicates that, since the VSC (Vehicle Stability
Control) system was turned off, the pre-collision
braking and pre-collision brake assist are dis-
abled (The pre-collision warning function will be
operational)
→Turn the VSC on. ( →P. 239, 265)
(If equipped)
Indicates that the pre-collision system is disabled.
→ Have the vehicle inspect ed by your Toyota
dealer.
Indicates that the hybrid battery (traction battery)
is low A buzzer also sounds.
→ When stopping the vehicle for a long
period of time, shift the shift lever to P. The
hybrid battery (traction battery) cannot be
charged with the shift position in N.
Indicates that the hybrid battery (traction battery)
power has dropped because a long period of time
has elapsed after shifting the shift lever to N A buzzer also sounds.
→ Shift the shift lever to P and restart the
hybrid system when starting the vehicle.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)
Page 495 of 596
4958-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52J11U)
Carrying out the corresponding action turns the message off.
After taking the specified steps to correct the suspected problem,
check that the warning message and light go off.
Other displayed message
Displayed messageDetails/Actions
Maintenance of the hybrid battery (traction battery)
cooling component is required The filter may be clogged, the air intake vent
may be blocked or there may be a gap in the
duct.
→ Have maintenance performed on the hybrid
battery (traction batter y) cooling component
at your Toyota dealer.
Have the malfunction repaired immediately. (vehicles with a
smart key system)
Interior
buzzerExterior buzzerWarning messageDetails/Actions
Once ⎯ The electronic key is not
detected when an attempt is
made to start the hybrid sys-
tem.
→
Start the hybrid system
with the electronic key
present.
(Flashes)
Page 497 of 596
4978-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52J11U)
9 times⎯
An attempt was made to start
the hybrid system without the
electronic key being present, or
the electronic key was not func-
tioning normally.
An attempt was made to drive
when the regular key was not
inside the vehicle.
→Confirm that the elec-
tronic key is inside the
vehicle.
Contin-
uous⎯
The driver’s door was opened
while a shift lever position other
than P was selected without
turning off the “POWER”
switch.
→ Shift the shift lever to P.
Contin-
uousContin-uous
The electronic key was carried
outside the vehicle and the
driver’s door was opened and
closed while a shift lever posi-
tion other than P was selected
without turning off the
“POWER” switch.
→ Shift the shift lever to P.
→ Bring the electronic key
back into the vehicle.
Interior
buzzerExterior buzzerWarning messageDetails/Actions
(Flashes)
(Flashes)
(Displayed alternately)
(Flashes)
Page 498 of 596

4988-2. Steps to take in an emergency
PRIUS c_U (OM52J11U)
⎯
Contin-uous
(5 sec-
onds)
An attempt was made to lock
the doors using the smart key
system while the electronic key
was still inside the vehicle.
→ Retrieve the electronic key
from the vehicle and lock
the doors again.
Once
Contin-
uous
(5 sec- onds)
An attempt was made to lock
either front door by opening a
door and putting the inside door
lock button into the lock posi-
tion, and then closing the door
while pulling on the outside
door handle with the electronic
key still inside the vehicle.
→ Retrieve the electronic key
from the vehicle and lock
the doors again.
Once⎯
• The electronic key could not
be detected when the
“POWER” switch was
pressed after the doors were
unlocked with the mechanical
key.
• The electronic key could not
be detected two consecutive
times when the “POWER”
switch was pressed.
→ Touch the electronic key to
the “POWER” switch while
depressing the brake
pedal.
Contin-
uous⎯
An attempt was made to start
the hybrid system with the shift
lever in a position other than P.
→ Shift the shift lever to P
and start the hybrid sys-
tem.
Interior
buzzerExterior buzzerWarning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)
(Flashes)