2011 TOYOTA COROLLA key battery

366 4-3. Do-it-yourself maintenance
BatteryCheck the battery as follows.
■ Battery exterior
Make sure that the 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
Ground cable
■Before recharging
When recharging, the battery produces hydrogen gas which is flammable
and explosive. Therefore, before recharging:
●If recharging with the battery installed on the vehicle, be sure to discon-
nect the ground cable.
● Make sure the power switch on the charger is off when connecting and
disconnecting the charger cables to the battery.
■ After recharging the battery (vehicles with smart key system)
The engine may not start. Follow the procedure below to initialize the sys-
tem.
Shift the shift lever to P.
Open and close any of the doors.
Restart the engine.
STEP 1
STEP 2
STEP 3

386
4-3. Do-it-yourself maintenance
Key batter y
Replace the battery with a new one if it is discharged.
■You will need the following items:
●Flathead screwdriver (To prevent damage to the key, cover
the tip of the screwdriver with a rag.)
● Small Phillips-hea d screwdriver
● Lithium battery
Vehicles with smart key system: CR1632
Vehicles without smart ke y system: CR2025 (Type A)
CR2016 (Type B)
■ Replacing the battery (vehicles with smart key system)
Take out the mechanical key.
Remove the cover.
STEP 1
STEP 2

387
4-3. Do-it-yourself maintenance
4
Maintenance and care
Remove the depleted battery.
Insert a new battery with the
“+” terminal facing up.
■
Replacing the battery (vehicles without smart key system)
Remove the cover.
Remove the module.
STEP 3
STEP 1
STEP 2

389
4-3. Do-it-yourself maintenance
4
Maintenance and care
■
If the 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 the following types of lithium battery
Vehicles with smart key system: CR1632
Vehicles without smart key system: CR2025 (Type A), CR2016 (Type B)
●Batteries can be purchased at your Toyota dealer, jewelers, or camera
stores.
● Replace only with the same or equivalent type recommended by your
Toyota 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. 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 components inside the remote control.
● Do not bend either of the battery terminals.

When trouble arises5
413
5-1. Essential informationEmergency flashers ......... 414
If your vehicle needs to be towed ........................ 415
If you think something is wrong ............................. 420
Fuel pump shut off system ........................... 421
Event data recorder ......... 422 5-2. Steps to take in an
emergency
If a warning light turns on or a warning buzzer
sounds... ....................... 424
If you have a flat tire......... 436
If the engine will not start ................................ 448
If the shift lever cannot be shifted from P................. 450
If you lose your keys ........ 451
If the electronic key does not operate properly....... 452
If the battery is discharged ..................... 454
If your vehicle overheats ....................... 460
If the vehicle becomes stuck .............................. 463
If your vehicle has to be stopped in an
emergency ..................... 465

5
When trouble arises
435
5-2. Steps to take in an emergency
*: 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. 2 7 )
Interior
buzzerExterior
buzzerWarning
lightWarning light/DetailsCorrection procedure
ContinuousContinuous
Smart key system warning
light
Indicates that the driver’s door
has been opened or closed
with the shift lever not in P, the
“ENGINE START STOP”
switch in any mode other than
OFF and the electronic key
outside of the detection area. • Shift the shift
lever to P.
• Confirm the location of the
electronic
key.

448
5-2. Steps to take in an emergency
If the engine will not star t
If the engine still does not start after following the correct starting
procedure (P. 129, 133) or releasing the steering lock ( P. 131,
135), confirm the fo llowing 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. 129, 133)
● There may be a malfunction in the 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. 454)
● The battery terminal connec tions may be loose or corroded.
■ The starter motor does not turn over (vehicles with smart
key system).
One of the following may be the cause of the problem.
●The engine starting system may be malfunctioning due to an
electrical problem such as an open circuit or a blown fuse.
However, an interim measure is available to start the engine.
(  P. 449)
● The electronic key battery is depleted. However, an interim
measure is available to start the engine. ( P. 453)

5
When trouble arises
449
5-2. Steps to take in an emergency
Emergency start function (vehicles with smart key system)
When the engine does not start, the following steps can be used as
an interim measure to start the engine if the “ENGINE START STOP”
switch is functioning normally.
Set the parking brake.
Shift the shift lever to P.
Set the “ENGINE START ST OP” switch to ACCESSORY
mode.
Press and hold the “ENGINE START STOP” switch for about
15 seconds while depressing the brake pedal firmly.
Even if the engine can be start ed using the above steps, the system
may be malfunctioning. Have the vehicle checked by your Toyota
dealer.
■ The starter motor does not turn over, the interior lights and
headlights do not turn on, or the horn does not sound.
One of the following may be the cause of the problem.
● One or both of the battery terminals may be disconnected.
● The battery may be discharged. ( P. 454)
● There may be a malfunction in the steering lock system (vehi-
cles with smart key system).
Contact your Toyota dealer if the problem cannot be repaired, or if
repair procedures are unknown.
STEP 1
STEP 2
STEP 3
STEP 4