TOYOTA PRIUS C 2018 Owners Manual (in English)

4918-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52G95U)
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 A buzzer also sounds.
→ Immediately stop the vehicle in a safe
place. ( →P. 531)
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.
Indicates a malfunction in the LDA (Lane Depar-
ture Alert) system A buzzer also sounds.
→ Have the vehicle inspect ed by your Toyota
dealer.
Indicates a malfunction in the PCS (Pre-Collision
System)
A buzzer also sounds.
→ Have the vehicle inspect ed by your Toyota
dealer.
(Flashes)

4928-2. Steps to take in an emergency
PRIUS c_U (OM52G95U)
Indicates a malfunction in:
• The Automatic High Beam system
• The LED headlight systemA buzzer also sounds.
→ Have the vehicle inspect ed by your Toyota
dealer.
Indicates that:
• There is a high possibility of a frontal collision;
or
• The pre-collision braking function is operating A buzzer also sounds.
→ Check the vehicle's surroundings and take
evasive action if necessary.
(If equipped)
• Indicates a malfunction in the smart key system
• Indicates a malfunction in the steering lock sys-
tem
A buzzer also sounds.
→ Have the vehicle inspect ed by your Toyota
dealer.
(If equipped)
Indicates a malfunction in the cruise control sys-
tem A buzzer also sounds.
→ Have the vehicle inspect ed by your Toyota
dealer.
Indicates a malfunction in the Brake Override
System
A buzzer also sounds.
→ Have the vehicle inspect ed by your Toyota
dealer immediately.
Warning messageDetails/Actions
(Flashes)

4938-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52G95U)
Indicates a malfunction in the Drive-Start ControlA buzzer also sounds.
→ Have the vehicle inspect ed by your Toyota
dealer immediately.
Alerts the driver that the vehicle has deviated
from the lane (while the LDA [Lane Departure
Alert] system is operating) The lane line on the side the vehicle has devi-
ated from flashes in yellow.
The warning buzzer sounds continuously.
→ Check around the vehicle and back to
inside of the lane lines.
Indicates that one or more of the side doors is not
fully closed The system also indicates which doors are not
fully closed.
If the vehicle reaches a speed of 3 mph (5
km/h), flashes and a buzzer sounds
to indicate that the door(s) are not yet fully
closed.
→ Make sure that all the side doors are
closed.
Indicates that the back door is not fully closed If the vehicle reaches a speed of 3 mph (5
km/h), flashes and a buzzer sounds
to indicate that the back door is not yet fully
closed.
→ Close the back door.
Warning messageDetails/Actions

4948-2. Steps to take in an emergency
PRIUS c_U (OM52G95U)
(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. 412)
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. 531)
Warning messageDetails/Actions
(Flashes)
(U.S.A.) (Canada)

4958-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52G95U)
Indicates that the Automatic High Beam switch is
pressed while the headlights are in low beam.
→Turn the high beam on.
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. 241, 268)
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)

4968-2. Steps to take in an emergency
PRIUS c_U (OM52G95U)Indicates that the driver’s door was opened with
the shift position in N, D or B
A buzzer also sounds.
→ Shift the shift lever to P.
Indicates that the accelerator pedal is depressed
while the shift position is in N A buzzer also sounds.
→ Release the accelerator pedal and shift the
shift lever to D, B or R.
Indicates that the power switch is turned to the
“ACC” or “LOCK” position (vehicles without a
smart key system) or the power switch is turned
to ACCESSORY mode or turned off (vehicles
with a smart key system) and the driver’s door is
opened while the lights are turned on A buzzer also sounds.
→ Turn the lights off.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)

4978-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52G95U)Indicates that the EV drive mode is not avail-
able
*2
The reason the EV drive mode is not available
(the vehicle is idling, battery charge is low,
speed is higher than the EV drive mode operat-
ing speed range, accelerator pedal is
depressed too much) may be displayed.
A buzzer also sounds.
→ Use the EV drive mode when it becomes
available.
Warning messageDetails/Actions

4988-2. Steps to take in an emergency
PRIUS c_U (OM52G95U)Indicates that the EV drive mode has been auto-
matically canceled
*2
The reason the EV drive mode is not available
(the battery charge is low, speed is higher than
the EV drive mode speed range, accelerator
pedal is depressed too much) may be dis-
played.
A buzzer also sounds.
→ Drive the vehicle for a while.
Indicates a malfunction in the vehicle’s charging
system A buzzer also sounds.
→ Immediately stop the vehicle in a safe place
and contact your Toyota dealer.
Indicates that the TRAC (Traction Control) sys-
tem has been deactivated
→ Turn the TRAC on. ( →P. 267)
Warning messageDetails/Actions
(Flashes 3
times)

4998-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52G95U)
Indicates that the accelerator and brake pedals
are being depressed simultaneously, and the
Brake Override System is operating. (→P. 171)
→ Release the accelerator pedal and depress
the brake pedal.
Indicates that, as the shift lever was shifted while
the accelerator pedal was depressed, Drive-Start
Control was activated. ( →P. 171)
A buzzer also sounds.
→ Release the accelerator pedal immediately.
Indicates that the accelerator pedal is depressed
with the shift lever in P
→ Release the accelerator pedal.
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)
• LDA (Lane Departure Alert)
• Automatic High Beam
→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.
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)
• LDA (Lane Departure Alert)
• Automatic High Beam
→ Turn the system off, clear the windshield of
dirt, fog, ice, etc. then turn the system back
on. (→P. 227)
Warning messageDetails/Actions
(Flashes)
(Flashes)

5008-2. Steps to take in an emergency
PRIUS c_U (OM52G95U)
*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. 198
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.
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.
Warning messageDetails/Actions