2012 TOYOTA PRIUS warning

5
When trouble arises
509
5-2. Steps to take in an emergency
Have the vehicle inspected immediately.
Failure to investigate the cause of the following warnings may lead to
the system operating abnormally and possibly cause an accident.
Have the vehicle inspected by your Toyota dealer immediately.
Warning messageDetails
(If equipped) Indicates a malfunction in the LED headlight system.
Indicates a malfunction in the P position control sys-
tem.
In this situation, there is a possibility that the parking
lock mechanism will not work.
When parking, park the vehicle on a flat surface and
apply the parking brake securely. Also, it may not be
possible to turn the “POWER” switch off. If this hap-
pens, applying the parking brake will enable the
switch to be turned off.
(Flashes)
(If equipped) Indicates a malfunction in the pre-collision system.
A buzzer also sounds.

510 5-2. Steps to take in an emergency
Warning messageDetails
(Flashes)
(If equipped) Indicates a malfunction in the radar cruise control sys-
tem.
A buzzer also sounds.
Press the “ON-OFF” button once to deactivate the
system, and then press the button again to reacti-
vate the system.
(Flashes)
(If equipped) Indicates a malfunction in the LKA.
A buzzer also sounds.

5
When trouble arises
511
5-2. Steps to take in an emergency
Follow the correction procedures.
After taking the specified steps to correct the suspected problem,
check that the warning message turns off.
*: Refer to the separate “Scheduled Maintenance Guide” or “Owner’s Manual Supplement” for the maintenance interval applicable to your vehicle.
Warning messageDetailsCorrection procedure
(U.S.A. only) Indicates that all maintenance
according to the driven dis-
tance on the maintenance
schedule
* should be per-
formed soon. If necessary, per-
form maintenance.
Comes on approximately 4500
miles (7200 km) after the main-
tenance data has been reset.
(U.S.A. only) Indicates that all maintenance
is required to correspond to
the driven distance on the
maintenance schedule
*.
Perform the neces-
sary maintenance.
Please reset the
maintenance data
after the mainte-
nance is per-
formed. (
P. 403)
Comes on approximately 5000
miles (8000 km) after the main-
tenance data has been reset.
(The indicator will not work
properly unless the mainte-
nance data has been reset.)

512 5-2. Steps to take in an emergency
Warning messageDetailsCorrection procedure
(If equipped) • Indicates that the pre-collision
system is not currently func-
tional because the grille or the
sensor is dirty.
• This message also appears when the pre-collision system
is not functional due to over-
heating. • Check the grille
and the sensor and
clean them if they
are dirty.
• In case of over- heating, the system
will become func-
tional once the sys-
tem cools down.
(Flashes)
(If equipped) Indicates that the radar cruise
control sensor is dirty or cov-
ered with ice.
Clean the sensor.
(Flashes)
(If equipped) Indicates that the radar cruise
control system is unable to
judge vehicle-to-vehicle dis-
tance.
If the windshield
wipers are on, turn
them off or set
them to either the
intermittent or the
slow mode.

5
When trouble arises
513
5-2. Steps to take in an emergency
Warning messageDetailsCorrection
procedure
(Flashes
rapidly)
(If equipped) Indicates that there is a high
possibility of a collision, or that
the pre-collision braking func-
tion is operating.
A buzzer also sounds.
At the same time,
will appear on the
head-up display (the image
flashes). Slow the vehicle by
applying the
brakes.
(If equipped) Indicates that there is a high
possibility of a collision.
Slow the vehicle by
applying the
brakes.
(If equipped, flashes) Indicates that your vehicle is
nearing the vehicle ahead (in
radar cruise mode).
A buzzer also sounds.
At the same time,
will appear on the
head-up display (the image
flashes). Slow the vehicle by
applying the
brakes.

514 5-2. Steps to take in an emergency
Warning messageDetailsCorrection procedure
(If equipped) Indicates that the LKA is not
currently functional. Restart the LKA.
In case of over-
heating, the system
will become func-
tional once the sys-
tem cools down.
Alerts the driver that the vehi-
cle is out of the lanes (while
the LKA system is operating). A buzzer also sounds. The
lane markings and/or the
steering wheel marking flash.
At the same time,
will appear on the
head-up display (the image
flashes). Check around the
vehicle and back to
inside of the lane
markings.
The hybrid system has over-
heated. A buzzer also sounds.
This message may be dis-
played when driving under
severe operating conditions.
(For example, when driving
up a long steep hill.) Stop and check.
(
P. 549)
(Flashes) The hybrid battery (traction
battery) is low.
A buzzer also sounds. When stopping the
vehicle for a long
period of time, shift
the shift position to
P. The hybrid bat-
tery (traction bat-
tery) cannot be
charged with the
shift position in N.

5
When trouble arises
515
5-2. Steps to take in an emergency
Warning messageDetailsCorrection
procedure
(Flashes) The hybrid battery (traction
battery) power has dropped
because a long period of time
has elapsed after shifting the
shift position to N.
A buzzer also sounds. Restart the hybrid
system when start-
ing the vehicle.
(Flashes) The transmission is out of P
when attempting to start the
hybrid system.
Shift the shift posi-
tion to P before
pressing the
“POWER” switch.
(Flashes) The driver’s door is opened
when the transmission is out of
P with the hybrid system on.
Shift the shift posi-
tion to P.
(Flashes) Indicates that the accelerator
pedal is depressed while the
shift position is in N.
A buzzer also sounds. Release the accel-
erator pedal and
shift the shift posi-
tion to D or R.
EV drive mode cannot be
switched to. A buzzer also sounds.
The reason why EV drive
mode cannot be used is
shown on the second line
(may not be shown in some
instances.) Use the EV drive
mode when it
becomes available.

516 5-2. Steps to take in an emergency
Warning messageDetailsCorrection procedure
(Flashes
3times) EV drive mode has been auto-
matically canceled.
A buzzer also sounds.
The reason why EV drive
mode cannot be used is
shown on the second line
(may not be shown in some
instances.) Drive normally for a
short time.
■ Approach warning message
In the following instances, there is the possibility that the approach warning
will not activate even when the vehicle-to-vehicle distance decreases.
●When your vehicle and the vehicle ahead are traveling at the same
speed or the vehicle ahead is traveling more quickly than your vehicle.
● When the vehicle ahead is traveling at very low speed.
● Immediately after cruise control speed is set.
● At the instant the accelerator pedal is depressed.