2012 TOYOTA 4RUNNER battery

534 4-3. Do-it-yourself maintenance
4RUNNER_U
CAUTION
■Where to safely charge the battery
Always charge the battery in an open area. Do not charge the battery in a
garage or closed room where there is insufficient ventilation.
■ How to recharge the battery
Only perform a slow charge (5 A or less). The 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 burning, get 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. Get emergency medical attention
immediately.
NOTICE
■When recharging the battery
Never recharge the battery while the engine is running. Also, be sure all
accessories are turned off.

552
4-3. Do-it-yourself maintenance
4RUNNER_U
Wireless remote control/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 CR2016 (vehicles without a smart key sys-
tem), or CR1632 (vehicles with a smart key system)
■ Replacing the battery (vehicles without a smart key system)
Remove the cover.
To prevent damage to the key,
cover the tip of the screwdriver
with a rag.
Remove the module.
Open the case cover using a
coin protected with tape etc.
and remove the depleted bat-
tery.
Insert a new battery with the
“+” terminal facing up.
STEP 1
STEP 2
STEP 3

553
4-3. Do-it-yourself maintenance
4
Maintenance and care
4RUNNER_U
■
Replacing the battery (vehicles with a smart key system)
Take out the mechanical key.
Remove the cover.
To prevent damage to the key,
cover the tip of the screwdriver
with a rag.
Remove the depleted battery.
Insert a new battery with the
“+” terminal facing up.
STEP 1
STEP 2
STEP 3

554 4-3. Do-it-yourself maintenance
4RUNNER_U
■Use a CR2016 (vehicles without a smart key system) or CR1632 (vehi-
cles with a smart key system) lithium battery
● Batteries can be purchased at your Toyota dealer, 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 key battery is depleted
The following symptoms may occur:
● The smart key system and wireless remote control will not function prop-
erly.
● The operational range will be reduced.
CAUTION
■Removed battery and other parts
Keep away from children. These parts are small and if swallowed by a child,
they can cause choking. Failure to do so could result in death or serious
injury.
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.

559
4-3. Do-it-yourself maintenance
4
Maintenance and care
4RUNNER_U
Fuse layout and amperage ratings
■ Engine compartment
FuseAmpereCircuit
1PTC HTR NO.330 A
PTC heater
2DEF30 ARear window defogger
3DEICER 20 A
Windshield wiper de-icer
4PTC HTR NO.230 APTC heater
5SUB BATT30 ATrailer sub battery
6PTC HTR NO.150 A
PTC heater
7MIR HTR10 AOutside rear view mirror defog-
gers
8TOWING TAIL30 A
Trailer tail light
9A/C COMP10 AAir conditioning system
10STOP10 A
Stop/tail lights
11IG220 AINJ, IGN, GAUGE fuses
12HORN10 AHorn(s)
13EFI 25 AMultiport fuel injection system/
sequential multiport fuel injec-
tion system
14A/F20 A
A/F sensor
CTH43AS139

When trouble arises5
577
4RUNNER_U
5-1. Essential informationEmergency flashers ......... 578
If your vehicle needs to be towed ........................ 579
If you think something is wrong ............................. 585
Fuel pump shut off system ........................... 586
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds ........................... 587
If you have a flat tire......... 603
If the engine will not start ................................ 616
If the shift lever cannot be shifted from P ............ 618
If you lose your keys ........ 619
If you cannot operate back door opener ........... 620
If the electronic key does not operate properly....... 621
If the vehicle battery is discharged ..................... 623
If your vehicle overheats ....................... 627
If the vehicle becomes stuck .............................. 630
If your vehicle has to be stopped in an
emergency ..................... 631

578
4RUNNER_U
5-1. Essential information
Emergency flashers
NOTICE
■To prevent battery discharge
Do not leave the emergency flashers on longer than necessary when the
engine is not running.
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, press the switch
once again.
CTH51AS005

596 5-2. Steps to take in an emergency
4RUNNER_U*: If the engine does not start when the electronic key is inside the vehi-
cle, the electronic key battery may be depleted or there may be diffi-
culties receiving the si gnal from the key. (
P. 4 3)
ContinuousContinuous
Smart key system warning
light
Indicates that the driver’s
door has been opened and
closed with the shift lever not
in P, the “ENGINE START
STOP” switch in any mode
other than off and the elec-
tronic key has been taken out
of the detection area • Shift the shift
lever to P.
• Confirm the location of the
electronic
key.
Once
Sounds
for 10
seconds
(Remains on for 60
seconds) Smart key system warning
light
Indicates that the electronic
key has been taken out of
the vehicle and an attempt
was made to lock the doors
with the “ENGINE START
STOP” switch in any mode
other than off Turn the
“ENGINE
START
STOP” switch
off and lock
the doors
again.
Once
Smart key system warning
light
Indicates that an attempt was
made to drive when the elec-
tronic key was not present Confirm the
location of the
electronic
key.
Interior
buzzerExterior
buzzerWarning
lightWarning light/DetailsCorrection procedure