Page 489 of 588

4898-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52F96U)Indicates that the TRAC (Traction Control) sys-
tem has been deactivated
Turn the TRAC on. ( P. 262)
Indicates that the accelerator and brake pedals
are being depressed simultaneously, and the
Brake Override System is operating. ( P. 167)
Release the accelerator or brake pedal.
Indicates that the shift lever is shifted while the
accelerator pedal is being depressed
A buzzer also sounds.
Release the accelerator pedal.
(If equipped)
The system is temporarily canceled because the
operating conditions of the front sensor (tempera-
ture, etc.) are not met.
The following systems may be suspended:
• PCS (Pre-Collision system) (if equipped)
• LDA (Lane Departure Alert) (if equipped)
• Automatic High Beam (if equipped)
The system can be operated when the
operating conditions of the front sensor
(temperature, etc.) are met. Turn the system
off, wait for a while, and then turn the sys-
tem back on.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)
Page 490 of 588

4908-2. Steps to take in an emergency
PRIUS c_U (OM52F96U)
*1: Refer to the separate “Scheduled Maintenance Guide” or “Owner’s ManualSupplement” for the maintenance interval applicable to your vehicle.
*2: For the EV drive mode operating conditions:P. 194
Carrying out the corresponding ac tion turns the message off.
(If equipped)
The area of the windshield in front of the front
sensor is fogged up or covered with dirt, rain, ice,
snow, etc.
The following systems may be suspended:
• PCS (Pre-Collision system) (if equipped)
• LDA (Lane Departure Alert) (if equipped)
• Automatic High Beam (if equipped)
Turn the system off, clear the windshield of
dirt, fog, ice, etc. then turn the system back
on. ( P. 222)
(If equipped)
Indicates that the LDA (Lane Departure Alert)
system cannot be used because the vehicle
speed is lower than approximately 32 mph (50
km/h)
Drive the vehicle at 32 mph (50 km/h) or
higher.
(If equipped)
Indicates that the LDA (Lane Departure Alert)
system is suspended (The vehicle speed is too
high for the system to operate.)
Reduce the vehicle speed.
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.
Warning messageDetails/Actions
(Flashes)
Page 491 of 588
4918-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52F96U)
After taking the specified steps to correct the suspected problem,
check that the warning message and light go off.
Have the malfunction repaired immediately. (vehicles with a
smart key system)
InteriorbuzzerExterior 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.
Once3 times
The electronic key was carried
outside the vehicle and the
driver’s door was opened and
closed while the shift lever was
in P without turning off the
“POWER” switch.
Turn the “POWER” switch
off or bring the electronic
key back into the vehicle.
The electronic key was carried
outside the vehicle and a door
other than the driver's door was
opened and closed while the
“POWER” switch was in a
mode other than off.
Bring the electronic key
back into the vehicle.
(Flashes)
(Flashes)
Page 492 of 588
4928-2. Steps to take in an emergency
PRIUS c_U (OM52F96U)
Once
Contin-uous
(For 5 sec-
onds)
An attempt was made to lock
the doors using the entry func-
tion after the electronic key was
carried outside the vehicle with-
out turning off the “POWER”
switch.
Turn the “POWER” switch
off and lock the doors
again.
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.
Interior
buzzerExterior buzzerWarning messageDetails/Actions
(Displayed alternately)
(Flashes)
(Flashes)
(Flashes)
Page 493 of 588

4938-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52F96U)
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.
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.
Interior
buzzerExterior buzzerWarning messageDetails/Actions
(Displayed alternately)
(Flashes)
(Flashes)
(Flashes)
Page 494 of 588
4948-2. Steps to take in an emergency
PRIUS c_U (OM52F96U)
Once
• The electronic key could notbe 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.
Power was turned off due to the
automatic power off function.
Next time when starting
the hybrid system,
increase the engine speed
slightly and maintain that
level for approximately 5
minutes to recharge the
12-volt-battery.
Once
The electronic key has a low
battery.
Replace the electronic key
battery. ( P. 444)
Interior
buzzerExterior buzzerWarning messageDetails/Actions
(Flashes)
(Flashes)
Page 495 of 588

4958-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52F96U)
Once
The driver's door was opened
and closed with the “POWER”
switch turned off and then the
“POWER” switch was put in
ACCESSORY mode twice with-
out the hybrid system being
started.
Press the “POWER”
switch while depressing
the brake pedal.
During a hybrid system starting
procedure in the event that the
electronic key was not function-
ing properly
(P. 511), the “POWER” switch
was touched with the electronic
key.
Press the “POWER”
switch within 10 seconds
of the buzzer sounding.
Once
The steering lock could not be
released within 3 seconds of
the “POWER” switch being
pressed.
Press the “POWER”
switch while depressing
the brake pedal and mov-
ing the steering wheel left
and right.
Once
The “POWER” switch has been
turned off with the shift lever in
a position other than P.
Shift the shift lever to P.
Interior
buzzerExterior buzzerWarning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)
Page 496 of 588
4968-2. Steps to take in an emergency
PRIUS c_U (OM52F96U)
■Warning buzzer
In some cases, the buzzer may not be heard because of noisy place or an
audio sound. Once
After the “POWER” switch has
been turned off with the shift
lever in a position other than P,
the shift lever has been shifted
to P.
Turn the “POWER” switch
off.
Interior
buzzerExterior buzzerWarning messageDetails/Actions
(Flashes)