2021 TOYOTA C-HR key battery

3976-3. Do-it-yourself maintenance
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Maintenance and care
C-HR_OM_USA_OM10684U
Wireless remote control/electronic key bat-
ter y
●Flathead screwdriver
● Small flathead screwdriver
● Lithium battery CR2032
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 battery cover.
If the battery cover is difficult to
remove, lift the edge to remove it.
Remove the depleted battery
using a small flathead screw-
driver.
Insert a new battery with the “+”
terminal facing up.
Replace the battery with a n ew one if it is depleted.
You will need the following items:
Replacing the battery
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3986-3. Do-it-yourself maintenance
C-HR_OM_USA_OM10684U
Install the battery cover with the
tab facing up.
Push the entire edge of the battery
cover into the key.
Install the key cover.
Align the key cover with the key
and then press it straight into the
key.
Make sure that the key cover is
securely installed without any gaps
between it and the key.
Vehicles with a smart key system
Release the lock and take out
the mechanical key.
Remove the cover.
Use an appropriate sized flathead
screwdriver. Forceful prying may
deform the cover.
To prevent damage to the key,
cover the tip of the screwdriver with
a rag.
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3996-3. Do-it-yourself maintenance
6
Maintenance and care
C-HR_OM_USA_OM10684U
Remove the depleted battery.
When removing the cover, if the
battery cannot be seen due to the
electronic key module attaching to
the upper cover, remove the elec-
tronic key module from the cover
so that the battery is visible as
shown in the illustration.
Use an appropriate sized flathead
screwdriver when removing the
battery.
Insert a new battery with the “+” terminal facing up.
When installing, reverse the steps listed.
■Use a CR2032 lithium battery
●Batteries can be purchased at your Toyota dealer, local electri cal appliance
shops or camera stores.
● Replace only with the same or equivalent type recommended by the manu-
facturer.
● 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.
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421
7When trouble arises
C-HR_OM_USA_OM10684U7-1. Essential information
Emergency flashers .......... 422
If your vehicle has to be stopped in
an emergency ................. 423
If the vehicle is trapped in rising water..... 425 7-2. Steps to
take in an emergency
If your vehicle needs to be towed .............................. 426
If you think something is wrong ......... 432
Fuel pump shut off system ............................ 433
If a warning light turns on or a warning buzzer
sounds ............................ 434
If a warning message is displayed......................... 444
If you have a flat tire.......... 449
If the engine will not start ................................. 460
If the electronic key does not operate properly
(vehicles with a
smart key system) ........... 462
If the vehicle battery is discharged ...................... 465
If your vehicle overheats ... 470
If the vehicle becomes stuck ............................... 473

4607-2. Steps to take in an emergency
C-HR_OM_USA_OM10684U
If the engine will not star t
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 again following correct starting proc edures.
(  P. 180, 183)
● There may be a malf unction in the engine immobilizer system.
(  P. 84)
One of the following may be the cause of the problem:
● The battery may be discharged. ( P. 465)
● The battery terminal connecti ons may be loose or corroded.
The engine starting system may be malfunctioning due to an elec trical
problem such as electronic key battery depletion or a blown fus e.
However, an interim measure is a vailable to start the engine.
(  P. 461)
If the engine will not start eve n though correct starting proce -
dures are being followed ( P. 180, 183), consider each of the fol-
lowing points:
The engine will not start even t hough the starter motor operates
normally.
The starter motor turns over slowly, the interior lights and he ad-
lights are dim, or the horn does not sound or sounds at a low
volume.
The starter motor does not turn over (vehicles with a smart key
system)

4617-2. Steps to take in an emergency
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When trouble arises
C-HR_OM_USA_OM10684U
One of the following may be the cause of the problem:
● One or both of the battery t erminals may be disconnected.
● The battery may be discharged. ( P. 465)
● There may be a malfunction in the steering lock system. (vehicl es
with a smart key system)
Contact your Toyota dealer if the problem cannot be repaired, o r if repair
procedures are unknown.
When the engine does not start, the following steps can be used as an
interim measure to start the engine if the engine switch is fun ctioning
normally:
Set the parking brake.
Shift the shift lever to P.
Turn the engine switch to ACCESSORY mode.
Press and hold the engine switch for about 15 seconds while
depressing the brake pedal firmly.
Even if the engine can be started using the above steps, the sy stem
may be malfunctioning. Have the vehicle inspected by your Toyot a
dealer.
The starter motor does not turn over, the interior lights and h ead-
lights do not turn on, o r the horn does not sound.
Emergency start function (vehicles with a smart key system)
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4627-2. Steps to take in an emergency
C-HR_OM_USA_OM10684U
If the electronic key does not operate
properly (vehicles with a smar t key system)
Use the mechanical key (P. 114) in order to perform the following
operations:
Locks all the doors
Closes the windows (turn and
hold)
*
Unlocks the door
Turning the key rearward unlocks
the driver’s door. Turning the key
once again within 3 seconds
unlocks the other doors.
Opens the windows (turn and
hold)
*
*
: These settings must be customized at your Toyota dealer. ( P. 506)
If communication between the electronic key and vehicle is
interrupted ( P. 136) or the electronic key cannot be used
because the battery is depleted, the smart key system and
wireless remote control can not be used. In such cases, the
doors can be opened and the engine can be started by follow-
ing the procedure below.
Locking and unlocking the doors

4647-2. Steps to take in an emergency
C-HR_OM_USA_OM10684U
■Stopping the engine
Set the parking brake, shift the shift lever to P and press the engine switch as
you normally do when stopping the engine.
■ Replacing the key battery
As the above procedure is a temporary measure, it is recommende d that the
electronic key battery be replaced immediately when the battery is depleted.
( P. 397)
■ Changing engine switch modes
Release the brake pedal and press the engine switch in step ab ove. The
engine does not start and modes will be changed each time the s witch is
pressed. ( P. 184)
■ When the electronic key does not work properly
●Make sure that the smart key system and push button start has n ot been
deactivated in the customization setting. If it is off, turn th e function on.
(Customizable features: P. 500)
● Check if battery-saving mode is set. If it is set, cancel the f unction.
( P. 135)
WARNING
■ When using the mechanical key and operating the power windows
Operate the power window after checking to make sure that there is no pos-
sibility of any passenger having any of their body parts caught in the side
window.
Also, do not allow children to operate the mechanical key. It is possible for
children and other passengers to get caught in the power window .
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