2012 TOYOTA PRIUS PLUS battery

418 4-3. Do-it-yourself maintenance
PRIUS +_OM_OM47821E_(EE)
CAUTION
When disconnecting the 12-volt battery
NOTICE
When recharging the 12-volt battery
Never recharge the 12-volt battery while the hybrid system is operating.
Also, be sure all accessories are turned off.
Do not disconnect the negative (-) termi-
nal on the body side as shown. The dis-
connected negative (-) terminal may
touch the positive (+) terminal, which may
cause a short and result in death or seri-
ous injury.

430
4-3. Do-it-yourself maintenance
PRIUS +_OM_OM47821E_(EE)
Electronic key batter y
Replace the battery with a new one if it is depleted.
You will need the following items:
Flathead screwdriver
Lithium battery CR1632
Replacing the battery
Take out the mechanical key.
Remove the cover.
To prevent damage, cover the
tip of the screwdriver with a
rag.
STEP 1
STEP 2

431 4-3. Do-it-yourself maintenance
4
Maintenance and care
PRIUS +_OM_OM47821E_(EE)
Use a CR1632 lithium battery
Batteries can be purchased at any authorized Toyota dealer or repairer,
or another duly qualified and equipped professional, local electrical appli-
ance shops or camera stores.
Replace only with the same or equivalent type recommended by the
manufacturer.
Dispose of used batteries according to local laws.
If the electronic key battery is depleted
The following symptoms may occur:
The smart entry & start system and wireless remote control will not func-
tion properly.
The operational range will be reduced.
Remove the depleted battery.
Insert a new battery with the
“+” terminal facing up.
When installing, reverse the steps listed.
ITO43P194
STEP 3
STEP 4

432 4-3. Do-it-yourself maintenance
PRIUS +_OM_OM47821E_(EE)
CAUTION
Removed battery and other parts
These parts are small and if swallowed by a child, they can cause choking.
Keep away from children. Failure to do so could result in death or serious
injury.
Certification for the smart entry & start system
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT
TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUC-
TIONS.
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 component inside the remote control.
Do not bend either of the battery terminals.

438 4-3. Do-it-yourself maintenance
PRIUS +_OM_OM47821E_(EE)
FUSEAmpereCircuit
12 P CON MAIN 7.5AP position control system, trans-
mission
13 AM2 7.5A Power management system
14 ECU-B2 7.5A Smart entry & start system
15 MAYDAY 10A No circuit
16 ECU-B3 10A Air conditioning system
17 TURN & HAZ 10A Turn signal lights
18 ETCS 10AMultiport fuel injection system/
sequential multiport fuel injection
system
19ABS MAIN
NO.120A Anti-lock brake system
20 P/I 2 40AHorn, right-hand headlight (low
beam), left-hand headlight (low
beam), back-up lights
21 ABS MTR 1 30A Anti-lock brake system
22 ABS MTR 2 30A Anti-lock brake system
23 H-LP HI MAIN 20AH-LP HI RH, H-LP HI LH,
headlight switch, daytime running
light system
24 HV BATT 10AHybrid system, hybrid battery
(traction battery)
25 DRL 7.5A Daytime running light system
26 P/I 1 60A IG2, EFI MAIN, BATT FAN
27 EPS 60A Electric power steering
28 PCU 10A Inverter and converter
29 IGCT NO.2 10AHybrid system, P position control
system, inverter and converter

439 4-3. Do-it-yourself maintenance
4
Maintenance and care
PRIUS +_OM_OM47821E_(EE)
FUSEAmpereCircuit
30 MIR HTR 10A Outside rear view mirror defoggers
31 RAD NO.1 15A Audio system, navigation system
32 DOME 10ADoor courtesy lights, personal
lights, interior lights, front foot
lights, vanity lights, inside rear
view mirror, overhead console
33 ECU-B 7.5ASmart entry & start system, multi-
plex communication system, per-
sonal lights, gauges and meters
34 H-LP LH HI 10A Left-hand headlight (high beam)
35 H-LP RH HI 10A Right-hand headlight (high beam)
36 EFI NO.2 10AMultiport fuel injection system/
sequential multiport fuel injection
system
37 IGCT NO.3 10A Cooling system
38 SPARE 30A Spare fuse
39 SPARE 10A Spare fuse
40 SPARE 7.5A Spare fuse
41 EFI MAIN 20AMultiport fuel injection system/
sequential multiport fuel injection
system, EFI NO.2
42 BATT FAN 10A Battery cooling fan
43 IG2 20AMultiport fuel injection system/
sequential multiport fuel injection
system, MET-IGN, IGN, hybrid
system

5When trouble arises
459
PRIUS +_OM_OM47821E_(EE)
5-1. Essential information
Emergency flashers .......... 460
If your vehicle needs
to be towed ..................... 461
If you think something is
wrong .............................. 468
5-2. Steps to take
in an emergency
If a warning light turns
on or a warning
buzzer sounds ................ 469
If you have a flat tire
(vehicles with
spare tire) ....................... 482
If you have a flat tire
(vehicles without
a spare tire) .................... 494
If the hybrid system
will not start..................... 516
If you lose your keys ......... 518
If the electronic key does not
operate properly ............. 519
If the 12-volt battery is
discharged ...................... 522
If your vehicle
overheats ........................ 528
If the vehicle becomes
stuck ............................... 534
If your vehicle has
to be stopped in
an emergency ................. 536

460
PRIUS +_OM_OM47821E_(EE)
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 the vehicle malfunctions or is
involved in an accident.
Press the switch to flash all
the turn signal lights. To turn
them off, press the switch
once again.