battery TOYOTA 86 2020 Service Manual

342 4-3. Do-it-yourself maintenance
WARNING
■Chemicals in the battery
A 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
battery:
● Do not cause sparks by touching the battery terminals with tool s.
● Do not smoke or light a match near the battery.
● Avoid contact with eyes, skin and clothes.
● Never inhale or swallow electrolyte.
● Wear protective safety glasses when working near the battery.
● Keep children away from the battery.
■ Where to safely charge the battery
Always charge the battery in an open area. Do not charge the ba ttery in a
garage or closed room where there is not sufficient ventilation.
■ 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.

343
4-3. Do-it-yourself maintenance
4
Maintenance and care
Washer fluid
If the washer fluid level is at
“LOW”, add washer fluid.
NOTICE
■When recharging the battery
Never recharge the battery while the engine is running. Also, b e sure all
accessories are turned off.
■ When adding distilled water
Avoid overfilling. Water spilled during battery recharging may cause corro-
sion.
■ Using the gauge
The washer fluid level can be checked by
observing the position of the level on the
liquid-covered holes in the gauge.
If the level falls below the second hole
from the bottom (the “LOW” position),
refill the washer fluid.
CTH43AS134
Current
fluid level

363
4-3. Do-it-yourself maintenance
4
Maintenance and care
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 CR2032 (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.
To prevent the buttons from
being disassembled, face the
button surface downward.
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

364 4-3. Do-it-yourself maintenance
■Replacing the battery (vehicl es 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

365
4-3. Do-it-yourself maintenance
4
Maintenance and care
■
Use a CR2016 (vehicles without a smart key system) or CR2032 (v ehi-
cles with a smart key system) lithium battery
● Batteries can be purchased at your Toyota dealer, local electri cal appli-
ance shops or camera stores.
● Replace only with the same or equivalent type recommended by th e
manufacturer.
● Dispose of used batteries according to local laws.
■ If the key battery is depleted
The following symptoms may occur:
●The smart key system (if equipped) and wireless remote control will not
function properly.
● The operational range will be reduced.
■ When putting the module back ( vehicles without a smart key syst em)
WARNING
■Removed battery and other parts
These parts are small and if swallowed by a child, they can cau se choking.
Keep away from children. Failure to do so could result in death or serious
injury.
Insert the module from directly above.
Inserting it on an angle may prevent the
key buttons from operating properly.

366 4-3. Do-it-yourself maintenance
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 cont rol.
● Do not bend either of the battery terminals.

When trouble arises5
383
5-1. Essential informationEmergency flashers ......... 384
If your vehicle needs to be towed ........................ 385
If you think something is wrong ......................... 393
Fuel pump shut off system ........................... 394
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds... ........................ 395
If a warning message is displayed........................ 407
If you have a flat tire......... 424 If the engine will
not start .......................... 435
If the shift lever cannot be shifted from P................. 438
If you lose your keys ........ 439
If the electronic key does not operate properly....... 440
If the battery is discharged ..................... 444
If your vehicle overheats ....................... 449
If the vehicle becomes stuck .............................. 452
If your vehicle has to be stopped in an
emergency ..................... 454

384
5-1. Essential information
Emergency flashers
■Emergency flashers
If the emergency flashers are used for a long time while the en gine is not
operating, the battery may discharge.
The emergency flashers are used to warn other drivers when the
vehicle has to be stopped in the road due to a breakdown, etc.
Press the switch.
All the turn signal lights will
flash. To turn them off, press
the switch once again.

5
When trouble arises
421
5-2. Steps to take in an emergency

Power was
turned off due to
the automatic
power off func-
tion.Next time
when
starting
the
engine,
increase
the engine
speed
slightly
and main-
tain that
level for
approxi-
mately 5
minutes to
recharge
the bat-
tery.
Once 
(Flashes in yellow)
Indicates that the
electronic key
battery is low. Replace
the bat-
tery.
(
P. 363)
Interior
buzzerExterior
buzzerWarning messageDetailsCorrection procedure

436
5-2. Steps to take in an emergency
If the engine will not start
If the engine will not start even though correct starting procedures
are being followed ( P. 166, 175), consider each of the following
points.
■ The engine will not start even when the starter motor oper-
ates normally.
One of the following may be the cause of the problem.
● There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
● The engine may be flooded.
Try to restart the engine once more following correct starting
procedures. ( P. 166, 175)
● There may be a malfunction in t he engine immobilizer system.
(  P. 7 9 )
■ The starter motor turns over slowly, the interior lights and
headlights 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 battery may be discharged. ( P. 445)
● The battery terminal connections may be loose or corroded.
■ The starter motor does not turn over. (vehicles with a smart
key system)
The engine starting system may be malfunctioning due to an
electrical problem such as an open circuit or a blown fuse. How -
ever, an interim measure is a vailable to start the engine.
(  P. 4 3 7 )