2009 TOYOTA PRIUS battery

360
4-3. Do-it-yourself maintenance
PRIUS_U_(OM47614U)
Engine compar tment
■12 volt battery
 P. 371
Washer fluid tank
( P. 374)
Brake fluid reservoir ( P. 369)
Engine oil filler cap ( P. 363)
Engine coolant reservoir ( P. 367)Inverter coolant reservoir
( P. 367)
Fuse box ( P. 394)
Radiator ( P. 369)
Condenser ( P. 369)
Electric cooling fans
Engine oil level dipstick ( P. 361)

371
4-3. Do-it-yourself maintenance
4
Maintenance and care
PRIUS_U_(OM47614U)
12 volt battery
■ Location
The 12 volt battery is located in
the right-hand side of luggage
compartment.
■ 12 volt battery exterior
Make sure that the 12 volt battery terminals are not corroded and that
there are no loose connections, cracks, or loose clamps.
Te r m i n a l s
Hold-down clamp

372 4-3. Do-it-yourself maintenance
PRIUS_U_(OM47614U)
■Before recharging
When recharging, the 12 volt battery produces hydrogen gas which is flam-
mable and explosive. Therefore, before recharging:
● If recharging with the 12 volt battery installed on the vehicle, be sure to
disconnect the ground cable.
● Make sure the power switch on the charger is off when connecting and
disconnecting the charger cables to the 12 volt battery.
■ After recharging/reconnecting the 12 volt battery
In some cases, the hybrid system may not start. Follow one or both of the
following procedures:
● After opening and closing the driver’s door, wait 10 seconds then attempt
to start the engine. (If the system does not start first time, repeat the pro-
cedure.)
● With the shift lever in “P” and the “POWER” switch in the OFF mode,
open and close any door, then attempt to start the hybrid system.
If the system will not start even after multiple attempts at both methods, con-
tact your Toyota dealer.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
PRIUS_U_(OM47614U)
CAUTION
■
Chemicals in the 12 volt battery
The 12 volt battery contains poisonous and corrosive sulfuric acid and may
produce hydrogen gas which is flammable and explosive. To reduce the risk
of death or serious injury, take the following precautions while working on or
near the 12 volt battery:
● Do not cause sparks by touching the 12 volt battery terminals with tools.
● Do not smoke or light a match near the 12 volt battery.
● Avoid contact with eyes, skin and clothes.
● Never inhale or swallow electrolyte.
● Wear protective safety glasses when working near the 12 volt battery.
● Keep children away from the 12 volt battery.
■ Where to safety charge the 12 volt battery
Always charge the 12 volt battery in an open area. Do not charge the 12 volt
battery in a garage or closed room where there is not sufficient ventilation.
■ How to recharge the 12 volt battery
Only perform a slow charge (3.5 A or less). The 12 volt battery may explode
if charged at a quicker rate.
■ Emergency measures regarding electrolyte
● If electrolyte gets in your eyes
Flush your eyes with clean water for at least 15 minutes and get immedi-
ate medical attention. If possible, continue to apply water with a sponge or
cloth while traveling to the nearest medical facility.
● If electrolyte gets on your skin
Wash the affected area thoroughly. If you feel pain or a burning sensation,
seek medical attention immediately.
● If electrolyte gets on your clothes
It can soak through clothing on to your skin. Immediately take off the cloth-
ing and follow the procedure above if necessary.
● If you accidentally swallow electrolyte
Drink a large quantity of water or milk. Follow with milk of magnesia,
beaten raw egg or vegetable oil. Get emergency medical attention immedi-
ately.

374 4-3. Do-it-yourself maintenance
PRIUS_U_(OM47614U)
Washer fluidIf any washer does not work, the
washer tank may be empty. Add
washer fluid.
NOTICE
■When recharging th e 12 volt battery
Never recharge the 12 volt battery while the hybrid system is operating.
Also, be sure all accessories are turned off.
CAUTION
■ When refilling the washer fluid
Do not refill the washer fluid when the hybrid system is hot or operating, as
the washer fluid contains alcohol and may catch fire if spilled on the hybrid
system etc.
NOTICE
■Do not use any fluid other than washer fluid
Do not use soapy water or engine antifreeze instead of washer fluid.
Doing so may cause streaking on the vehicle’s painted surfaces.
■ Diluting washer fluid
Dilute washer fluid with water as necessary.
Refer to the freezing temperatures listed on the washer fluid tank.

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4-3. Do-it-yourself maintenance
PRIUS_U_(OM47614U)
Electronic key batter y
Replace the battery with a new one if it is discharged.
■You will need the following items:
●Small Phillips-hea d screwdriver
● Lithium battery (CR2032)
■ Replacing the battery
Take out the mechanical key.
Remove the cover.
Remove the battery cover
bolts, the battery cover and
depleted battery.
Insert a new battery with the
“+” terminal facing up.
STEP1
STEP2
STEP3

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4-3. Do-it-yourself maintenance
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Maintenance and care
PRIUS_U_(OM47614U)
■
If the electronic key battery is discharged
The following symptoms may occur.
● The smart key system and wireless remote control will not function prop-
erly.
● The operational range is reduced.
■ Use a CR2032 lithium battery
● Batteries can be purchased at your Toyota dealer, jewelers, or camera
stores.
● Replace only with the same or equivalent type recommended by a Toy-
ota dealer.
● Dispose of used batteries according to the local laws.
CAUTION
■Removed battery and other parts
Keep away from children.
These parts are small and if swallowed by a child they can cause choking.
NOTICE
■For normal operation after replacing the battery
Observe the following precautions to prevent accidents.
● Always work with dry hands.
Moisture may cause the battery to rust.
● Do not touch or move any other components inside the electronic key.
● Do not bend the battery terminals.

400 4-3. Do-it-yourself maintenance
PRIUS_U_(OM47614U)
*1: Vehicles with halogen headlights (low beam)
*2: Vehicles with discharge headlights (low beam)35 ABS-1 25 A Anti-lock brake system
36 ETCS 10 A Electronic throttle control system
37 BATT FAN 10 A Battery cooling fan
38 HAZ 10 A
Turn signal lights, emergency
flasher
39 DOME 15 A Audio system, interior lights, smart
key system, gauge and meter, turn
signal lights, luggage room light,
clock
40 ABS MAIN3 15 A Anti-lock brake system
41 ABS MAIN2 10 A Anti-lock brake system
42 ABS MAIN1 10 A Anti-lock brake system
43 FR FOG 15 A Fog lights
44 CHS W/P 10 A CHS W/P
45 AMP 30 A Audio system
46 PTC HTR2 30 A PTC heater
47 PTC HTR1 30 A PTC heater
48 CDS FAN 30 A Electric cooling fan
FuseAmpereCircuit