2010 TOYOTA PRIUS Owners Manual

5
When trouble arises
513
5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
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
overheating, the
system will become
functional once the
system cools
down.
(Flashing) 
(If equipped) Indicates that the radar cruise
control sensor is dirty or cov-
ered with ice.
Clean the sensor.
(Flashing) 
(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.

514 5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
Warning messageDetailsCorrection procedure
(If equipped) Indicates that there is a high
risk of a collision, or that the
pre-collision brake function is
operating.
Slow the vehicle by
applying the
brakes.
(If equipped) Indicates that there is a high
risk of a collision.
Slow the vehicle by
applying the
brakes.
(If equipped, flash- ing) Your vehicle is nearing the
vehicle ahead (in radar cruise
mode).
Slow the vehicle by
applying the
brakes.
(Flashing) 
(If equipped) Indicates a malfunction the
LKA.
A buzzer also sounds. Restart the LKA
after restarting the
hybrid system.

5
When trouble arises
515
5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
Warning messageDetailsCorrection
procedure
(If equipped) Indicates that the LKA is not
currently functional.
Restart the LKA.
The hybrid system has over-
heated. Stop and check.

( P. 548)
(Flashing) The hybrid battery (traction
battery) is low.
Stop the vehicle
and push the “P”
position switch.
(Flashing) The transmission is out of “P”
when attempting to start the
hybrid system.
Push the “P” posi-
tion switch before
pressing the
“POWER” switch.
(Flashing) The driver’s door is opened
when the transmission is out of
“P” with the hybrid system on.
Push the “P” posi-
tion switch.

516 5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
Warning messageDetailsCorrection procedure
EV-Drive Mode cannot be
switched to. A buzzer also sounds. Use the EV-Drive
Mode when it
becomes available.
The EV-Drive Mode has been
automatically cancelled. A buzzer also sounds. Drive normally for a
short time.
■ After changing the engine oil (U.S.A. only)
Make sure to reset the oil maintenance data. ( P. 428)
■ 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.

5
When trouble arises
517
5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
Have the malfunction repaired immediately.
After taking the specified steps to correct the suspected problem,
check that the warning message and light turn off.
Interior buzzerExterior buzzerWarning messageDetailsCorrection procedure
Once 
(Comes on for 10 seconds.)
(Flashing) The electronic
key is not
detected when
attempting to
start the hybrid
system.
Confirm
the loca-
tion of the
electronic
key.
Once 3 times (Flashing)An open door
other than the
driver’s door is
closed while the
electronic key is
outside the
detection range
and the
“POWER”
switch is in
ACCESSORY
or ON mode.
Confirm
the loca-
tion of the
electronic
key.

518 5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
InteriorbuzzerExterior buzzerWarning messageDetailsCorrection procedure
Once 3 times (Flashing)An open door
other than the
driver’s door is
closed while the
electronic key is
outside the
detection range
and the
“POWER”
switch is in
ACCESSORY
or ON mode
with the shift
position in “P”. Turn the
“POWER”
switch to
OFF or
confirm
the loca-
tion of the
electronic
key.
Contin-
uous 
(Flashing)The driver’s
door has been
opened with the
shift position in
a position other
than “P” and
without first
turning the
“POWER”
switch is OFF. Put the
shift posi-
tion into
“P”.

5
When trouble arises
519
5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
Interior
buzzerExterior buzzerWarning messageDetailsCorrection procedure
Once Contin-
uous
(Displayed alternately)(Flashing) The electronic
key has been
taken outside
the vehicle and
the doors have
been locked
without first
turning the
“POWER”
switch to OFF.
(vehicles with
entry function)
Turn the
“POWER”
switch to
OFF and
lock the
doors
again.

520 5-2. Steps to take in an emergency
PRIUS_U (OM47668U) U.S.A.
InteriorbuzzerExterior buzzerWarning messageDetailsCorrection procedure
Once Contin-
uous
(Flashing)An attempt to
lock the doors
has been made
using the smart
key system
while the elec-
tronic key is
inside the vehi-
cle. (vehicles
with entry func-
tion)
Take the
electronic
key out-
side the
vehicle,
and lock
the doors
again.
With the key
inside the vehi-
cle, a front door
has been
opened, the
lock lever has
been pulled in
the lock direc-
tion, the door
has been
closed while the
door handle is
being pulled,
and an attempt
has been made
to lock the door.