2009 TOYOTA PRIUS Light

5
When trouble arises
437
5-2. Steps to take in an emergency
PRIUS_U_(OM47614U)
■The compact spare tire
●The compact spare tire is identifi
ed by the label “TEMPORARY USE
ONLY” on the tire sidewall.
Use the compact spare tire temporarily only in an emergency.
●Make sure to check the tire inflation pressure of the compact spare
tire. ( P. 468)
■Tread life
The compact spare tire can be used many times, if necessary. It has
tread life of up to 3000 miles (4800 km) depending on road conditions
and your driving habits. When treadwear indicators appear on the tire,
replace the tire. ( P. 375)
■When using the compact spare tire
As the compact spare tire is not equipped with the tire pressure warning
valve and transmitter, low inflation pressure of the spare tire will not be
warned. Also, if you replace the compac t spare tire after the tire pressure
warning light comes on, the light remains on.
■ Compact spare tire
The compact spare tire saves space in your luggage compart-
ment, and its lighter weight helps to enhance fuel economy and
permits easier installation in case of a flat tire.
The compact spare tire is
designed for temporary emer-
gency use only.

440 5-2. Steps to take in an emergency
PRIUS_U_(OM47614U)Slightly loosen the wheel nuts
(one turn).
Turn the tire jack portion “A” by
hand until the notch of the jack is
in contact with the jack point.
Raise the vehicle until the tire is
slightly raised off the ground.
Remove all the wheel nuts and
the tire.
When resting the tire on the
ground, place the tire so that the
wheel design faces up to avoid
scratching the wheel surface.
ITY52P006
STEP2
STEP3
ITY52P008
STEP4
ITY52P009
STEP5

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.

5
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

452 5-2. Steps to take in an emergency
PRIUS_U_(OM47614U)
■When the 12 volt battery is removed or discharged
The following systems must be initialized.
● Power windows (
P. 76)
● The hybrid system may not start. ( P. 446)
CAUTION
■Avoiding 12 volt battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flam-
mable gas that may be emitted from the 12 volt battery.
● Make sure the jumper cable is connected to the correct terminal and that it
is not unintentionally in contact with any part other than the intended termi-
nal.
● Do not allow the jumper cables to come into contact with the “+” and “-” ter-
minals.
● Do not allow open flame or use matc hes, cigarette lighters or smoke near
the 12 volt battery.
■ 12 volt battery precautions
The 12 volt battery contains poisonous and corrosive acidic electrolyte, while
related parts contain lead and lead compounds. Observe the following pre-
cautions when handling the 12 volt battery:
● When working with the 12 volt battery, always wear safety glasses and
take care not to allow any battery fluids (acid) to come into contact with
skin, clothing or the vehicle body.
● Do not lean over the 12 volt battery.
● In the event that battery fluid comes into contact with the skin or eyes,
immediately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention
can be received.
● Always wash your hands after handling the battery support, terminals, and
other battery-related parts.
● Do not allow children near the 12 volt battery.

454
5-2. Steps to take in an emergency
PRIUS_U_(OM47614U)
If your vehicle overheats
Correction proceduresStop the vehicle in a safe place and turn off the automatic air
conditioning system.
Check to see if steam is coming out from under the hood.
If you see steam: Stop the hybrid system. Carefully lift the hood after the
steam subsides and then restart the hybrid system.
If you do not see steam: Leave the hybrid system operating and carefully lift the
hood.
Remove the engine compartment cover. ( P. 361)
Check to see if the cooling fan is operating.
If the fan is operating: Wait until the engine coolant temperature gauge begins to
fall and then stop the hybrid system.
If the fan is not operating: Stop the hybrid system immediately and call your local Toy-
ota dealer.
The following may indicate that your vehicle is overheating:
The high engine coolant temperature warning light comes on:
The hybrid system may be overheating.
Follow the correction procedure as described blow.
STEP1
STEP2
STEP3
STEP4

5
When trouble arises
455
5-2. Steps to take in an emergency
PRIUS_U_(OM47614U)
After the hybrid system has
cooled down sufficiently, check
the coolant level and inspect the
radiator core (radiator) for any
leaks.
Add coolant if required.
Water can be used in an emer-
gency measure if coolant is
unavailable. (
P. 465)
Have the vehicle checked at your nearest Toyota dealer as soon as
possible.
ITY52P018
STEP5
ITY52P019
STEP6
■Overheating
In the following situations, your vehicle may be overheating.
● High coolant temperature warning light is displayed on the touch screen.
● Steam is coming from under the hood.

466 6-1. Specifications
PRIUS_U_(OM47614U)
Electrical system
Transmission
12 volt battery
Open voltage at
68F (20 C): 12.6 
12.8 V Fully charged
12.2  12.4 V Half charged
11 . 5  11.9 V Discharged
(Voltage is checked 20 minutes after
the hybrid system and all lights are
turned off.)
Charging rates 3.5 A max.
Fluid capacity
Drain and refill3.8 qt. (3.6 L, 3.2 lmp.qt.)
Fluid type Toyota Genuine ATF WS
NOTICE
■Transmission fluid type
Using transmission fluid other than “Toyota Genuine ATF WS” may cause
deterioration in shift quality, locking up of your transmission accompanied by
vibration, and ultimately damage the transmission of your vehicle.