2009 TOYOTA PRIUS battery

When trouble arises5
411
PRIUS_U_(OM47614U)
5-1. Essential informationEmergency flashers ......... 412
If your vehicle needs to be towed ........................ 413
If you think something is wrong ............................. 420
Event data recorder ......... 421
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds... ........................ 423
If you have a flat tire......... 436
If the hybrid system will not start ................................ 446
If you lose your keys ........ 447
If the electronic key does not operate properly....... 448
If the 12 volt battery is discharged ..................... 449
If your vehicle overheats .. 454
If the vehicle becomes stuck .............................. 457

412
PRIUS_U_(OM47614U)
5-1. Essential information
Emergency flashers
NOTICE
■To prevent 12 volt battery discharge
Do not leave the emergency flashers on longer than necessary when the
hybrid system is not operating.
Use the emergency flashers if th e vehicle malfunctions or is
involved in an accident.
Press the switch to flash all
the turn signal lights. To turn
them off, push the switch once
again.

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When trouble arises
427
5-2. Steps to take in an emergency
PRIUS_U_(OM47614U)
*1: This warning light is di
splayed on the touch screen.
*2: Open door warning buzzer:

(U.S.A.)
Engine oil replacement
reminder light
Illuminates for about 3 sec-
onds and then flasher for
about 15 seconds:
Engine oil is scheduled to
be changed. Check and the engine oil,
and change if necessary.
Comes on and remains:
Engine oil should be
changed. Check and change the
engine oil.

*1
Hybrid battery warning
light
The hybrid battery voltage
drops when the transmis-
sion is left in “N” position. Push the “P” position
switch.
The hybrid battery is dis-
charged. If this light comes on with
the “READY” light on in this
case, have the system
checked by your Toyota
dealer.

*1
High coolant temperature
warning light Indicates high engine cool-
ant temperature P. 454
Master warning light A buzzer sounds and the
warning light comes on
and flashes to indicate that
the master warning system
has detected a malfunc-
tion. Take appropriate action in
accordance with the mes-
sage displayed on the touch
screen.
Warning lightWarning light/DetailsCorrection procedure

446
5-2. Steps to take in an emergency
PRIUS_U_(OM47614U)
If the hybrid system will not start
If the hybrid system will not start even though correct starting proce-
dures are being followed (
P. 132), consider each of the following
points.
■ The hybrid system will not start even when the starter motor
operates normally.
One of the following may be the cause of the problem.
●The electronic key battery may be discharged. ( P. 448)
● The hybrid system may be flooded.
Try to restart the hybrid system once more following correct
starting procedures. (P. 132)
● There may be a malfunction in the immobilizer system.
( P. 8 2 )
■ The interior lights and headlight s are dim, or the horn does
not sound or sounds at a low volume
One of the following may be the cause of the problem.
● The 12 volt battery may be discharged. ( P. 449)
● The 12 volt battery terminal c onnections may be loose or cor-
roded.
■ The interior lights and headlights do not turn on, or the horn
does not sound
One of the following may be the cause of the problem.
●One or both of the 12 volt battery terminals may be discon-
nected.
● The 12 volt battery may be discharged. ( P. 449)
Contact your Toyota dealer if the problem cannot be repaired,
or if repair procedures are unknown.

448
5-2. Steps to take in an emergency
PRIUS_U_(OM47614U)
If the electronic key does not operate properly
Locking and unlocking the doorsUsing the mechanical key
( P. 34) in order to perform
the following operations:
Locks all doors
Unlocks the door
Turning the key rearward unlocks
the driver’s door. Turning the key
once again unlocks the other
doors.
Starting the hybrid system
To start the hybrid system, insert
the key into the key slot.
( P. 134)
If the electronic key battery is di scharged, the doors can be opened
by the mechanical key. The hybrid system can be still started by fol-
lowing the procedure.
■ Replacing the key battery
As this procedure is the temporary measure, it is recommended that the
electronic key battery be replaced immediately. ( P. 392)

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When trouble arises
449
5-2. Steps to take in an emergency
PRIUS_U_(OM47614U)
If the 12 volt batter y is discharged
The following procedures may be used to start the hybrid system if
the vehicle’s 12 volt battery is discharged.
You can call your Toyota dealer, or qualified repair shop.
If you have a set of jumper (or boo ster) cables and a second vehi-
cle with a 12 volt battery, you can jump start your Toyota following
the steps below.
Open the hood and fuse block cover.
Open the exclusive jump start-
ing terminal cover.
STEP1
STEP2

450 5-2. Steps to take in an emergency
PRIUS_U_(OM47614U)
Connecting the jumper cables.
Exclusive jump starting terminal on your vehicle.
Positive (+) battery terminal on the second vehicle.
Negative (-) battery terminal on the second vehicle.
Connect the jumper cable to ground on your vehicle as shown in
the illustration.STEP3
ITY52P017

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When trouble arises
451
5-2. Steps to take in an emergency
PRIUS_U_(OM47614U)
■
Starting the hybrid system when the battery is discharged
The hybrid system cannot be started by push-starting.
■ Avoiding a discharged 12 volt battery
● Turn off the headlights and the audio system while the hybrid system is
turned off.
● Turn off any unnecessary electrical components when the vehicle is run-
ning at a low speed for an extended period, such as in heavy traffic, etc.
Start the engine of the second vehicle. Increase the engine
speed slightly and maintain at that level for approximately
five minutes to recharge the 12 volt battery of your vehicle.
Open and close any of the doors with the “POWER” switch
OFF.
Maintain the engine speed on the second vehicle and turn
the “POWER” switch to the ON mode, then start the vehi-
cle’s hybrid system.
Make sure the “READY” light comes on. If the “READY”
light will not come on and the hybrid system will not start
after you recharge the battery, do the following procedure.
Turn the hybrid system off. Open and close the driver’s
door. Then push the “POWER” switch briefly and firmly. If
the light does not come on, contact your Toyota dealer.
Once the vehicle’s hybrid syst em has started, remove the
jumper cables in the exact reverse order in which they were
connected.
Once the hybrid system starts, have the vehicle checked at your
Toyota dealer as soon as possible.STEP4
STEP5
STEP6
STEP7
STEP8