2010 TOYOTA PRIUS light

438 4-3. Do-it-yourself maintenance
PRIUS_U (OM47668U) U.S.A.
■After recharging/reconnecting the 12 volt battery
● Unlocking the doors using the smart key system may not be possible
immediately after disconnecting the 12 volt battery. If this happens, use
the wireless remote control or the mechanical key to lock/unlock the
doors.
● Start the hybrid system with the “POWER” switch in ACCESSORY mode.
The hybrid system may not start with the “POWER” switch turned OFF.
However, the hybrid system will operate normally from the second
attempt.
● The “POWER” switch mode is recorded by the vehicle. If the battery is
reconnected, the vehicle will return the “POWER” switch mode to the sta-
tus it was in before the battery was disconnected. Make sure to turn off
the power before disconnect the battery. Take extra care when connect-
ing the battery if the “POWER” switch mode prior to discharge is
unknown.
If the system will not start even after multiple attempts, contact your Toyota
dealer.
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.

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Maintenance and care
PRIUS_U (OM47668U) U.S.A.
■
How to initialize the tire pressure warning system
Park the vehicle in safe plac e and turn the “POWER” switch
OFF.
While the vehicle is moving, in itialization is not performed.
Adjust the tire inflation pressure to the specified cold tire infla-
tion pressure level. ( P. 565)
Make sure to adjust the tire pressure to the specified cold tire
inflation pressure level. The ti re pressure warning system will
operate based on this pressure level.
Turn the “POWER” switch to ON mode.
Push and hold the tire pressure
warning reset switch until the tire
pressure warning light blinks
slowly 3 times.
Wait for a few minutes with the ON mode, and then turn
“POWER” switch OFF.
STEP1
STEP2
STEP3
STEP4
STEP5

444 4-3. Do-it-yourself maintenance
PRIUS_U (OM47668U) U.S.A.
Registering ID codesThe tire pressure warning valve and transmitter is equipped with a
unique ID code. When replacing a ti re pressure warning valve and
transmitter, it is necessary to regist er the ID code of tire pressure
warning valve and transmitter. Have the ID code registered by your
Toyota dealer.
■ When to replace your vehicle’s tires
Tires should be replaced if:
● You have tire damage such as cuts, splits, cracks deep enough to
expose the fabric or bulges indicating internal damage
● A tire goes flat repeatedly or cannot be properly repaired due to the size
or location of a cut or other damage
If you are not sure, consult with your Toyota dealer.
■ Replacing tires and wheels
If the ID code of the tire pressure warning valve and transmitter is not regis-
tered, the tire pressure warning system will not work properly. After driving
for about 20 minutes, the tire pressure warning light comes on after blinking
for 1 minute to indicate a system malfunction.

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Maintenance and care
PRIUS_U (OM47668U) U.S.A.
■Initializing the tire pressure warning system
Initialize the tires with the tire inflat
ion pressure adjusted to the specified
level.
■If you push the tire pressure warning reset switch accidentally
If initialization is performed, adjust t he tire inflation pressure to the speci-
fied level and initialize the tire pressure warning system again.
■When the initialization of the tire pressure warning system has
failed
Initialization can be completed in a few minutes. However, in the following
cases, the settings have not been recorded and the system will not operate
properly. If repeated attempts to record tire inflation pressure settings are
unsuccessful, have the vehicle inspected by your Toyota dealer.
●
When operating the tire pressure warning reset switch, the tire pres-
sure warning light does not flash 3 times.
●After carrying out the initialization procedure, the tire pressure warn-
ing light blinks for 1 minute then stays on after driving 20 minutes.
■Routine tire inflation pressure checks
The tire pressure warning system doe s not replace routine tire inflation
pressure checks. Ma ke sure to check tire infl ation pressure as part of
your routine of daily vehicle checks.

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Maintenance and care
PRIUS_U (OM47668U) U.S.A.
CAUTION
■When inspecting or replacing tires
Observe the following precautions to
prevent accidents. Failure to do so
may cause damage to parts of the drive train, as well as dangerous han-
dling characteristics, which may lead to an accident resulting in death or
serious injury.
●Do not mix tires of different ma kes, models or tread patterns.
Also, do not mix tires of remarkably different treadwear.
●Do not use tire sizes other than those recommended by Toyota.
●Do not mix differently constructed tire s (radial, bias-belted or bias-ply
tires).
●Do not mix summer, all season and winter tires.
●Do not use tires that have been used on another vehicle. 
Do not use tires if you do not know how they were used previously.
■When initializing the tire pressure warning system
Do not push the tire pressure warnin g reset switch without first adjusting
the tire inflation pressure to the spec ified level. Otherwise, the tire pres-
sure warning light may not come on even if the tire inflation pressure is
low, or it may come on when the tire inflation pressure is actually normal.

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Maintenance and care
PRIUS_U (OM47668U) U.S.A.
Fuse layout and amperage ratings
■ Engine compartment
FUSEAmpereCircuit
1 HTR 50A Air conditioning system
2 RDI 30A Electric cooling fans
3 CDS 30A Electric cooling fans
4 S-HORN 10A No circuit
5 ENG W/P 30A Cooling system
6 ABS MAIN
NO.2 7.5A Anti-lock brake system
7 H-LP CLN 30A Headlight cleaner
8 AMP 30A Audio system
9 IGCT 30A PCU, IGCT NO.2, IGCT NO.3
10 DC/DC-S 5A Inverter and converter
11 P CON MAIN 7.5A Parking control system, transmis-
sion
ITO43P132
1
2
3
456 7
891011 12
13 14
15 16
17 18
19 20 21 22
2324
25 26 27 28 29 30 31 32 33 34
35 36 37 38 39 40

466 4-3. Do-it-yourself maintenance
PRIUS_U (OM47668U) U.S.A.
FUSEAmpereCircuit
12 AM2 7.5A Power windows
13 ECU-B2 7.5A Smart key system
14 MAYDAY 10A No circuit
15 ECU-B3 10A Air conditioning system
16 TURN & HAZ 10A Turn signal lights
17 ETCS 10AMultiport fuel injection system/
sequential multiport fuel injection
system
18 ABS MAIN
NO.1 20A Anti-lock brake system
19 P/I 2 40AParking control system, horn,
right-hand headlight (low beam),
left-hand headlight (low beam),
back-up lights
20 ABS MTR 1 30A Anti-lock brake system
21 ABS MTR 2 30A Anti-lock brake system
22 H-LP HI MAIN 20A H-LP HI RH, H-LP HI LH,
headlight switch, daytime running
light system
23 P/I 1 60A IG2, EFI MAIN, BATT FAN
24 EPS 60A Electric power steering
25 PCU 10A Inverter and converter
26 IGCT NO.2 10A Hybrid system, parking control
system, power windows, inverter
and converter

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Maintenance and care
PRIUS_U (OM47668U) U.S.A.
FUSEAmpereCircuit
27 MIR HTR 10A Outside rear view mirror defoggers
28 RAD NO.1 15A Audio system, navigation system
29 DOME 10ADoor courtesy lights, personal
lights, interior lights, front foot
lights, vanity lights, inside rear
view mirror, garage door opener,
electric power steering
30 ECU-B 7.5ASmart key system, multiplex com-
munication system, personal
lights, gauges and meters
31 H-LP LH HI 10A Left-hand headlight (high beam)
32 H-LP RH HI 10A Right-hand headlight (high beam)
33 EFI NO.2 10AMultiport fuel injection system/
sequential multiport fuel injection
system
34 IGCT NO.3 10A Cooling system
35 SPARE 30A Spare fuses
36 SPARE 15A Spare fuses
37 SPARE 7.5A Spare fuses
38 EFI MAIN 20AMultiport fuel injection system/
sequential multiport fuel injection
system, EFI NO.2
39 BATT FAN 10A Battery cooling fan
40 IG2 20AMultiport fuel injection system/
sequential multiport fuel injection
system, MET-IGN, IGN, power
windows