2021-2026 Toyota Yaris 4 Door MaintenanceandCare -> Key Battery Replacement User Manual
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MaintenanceandCare -> Key Battery Replacement for Your Toyota Yaris 4 Door Fourth Generation (2021-2026)

410  
5-3. Owner Maintenance  
Key Battery Replacement  
If the buttons on the smart key are inoperable and the operation indi-  
cator light does not flash, the battery may be dead.  
Replace with a new battery before the smart key becomes unusable.  
The following conditions indicate that the battery power is low:  
• The KEY indicator light (green) flashes in the combination meter for  
about 30 seconds after the engine is switched OFF.  
• The system does not operate and the operation indicator light on  
the smart key does not flash when the buttons are pressed.  
• The system’s operational range is reduced.  
Replacing the battery at your Toyota dealer is recommended to pre-  
vent damage to the key. If replacing the battery by yourself, follow the  
instruction below.  
■ Replacing the key battery  
1
Press the knob and pull out  
the auxiliary key.  
Knob  
2
Twist a tape-wrapped flat-  
Cover  
head screwdriver in the  
direction of the arrow and  
open the cover slightly.  
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)  
411  
5-3. Owner Maintenance  
Cover  
3
4
5
6
Insert the tape-wrapped flat-  
head screwdriver into the  
gap and slide it in the direc-  
tion of the arrow.  
Gap  
Twist the flathead screw-  
driver in the direction of the  
arrow and remove the cover.  
Cover  
Remove the battery cap,  
then remove the battery.  
5
Insert a new battery with the  
positive pole facing up, and  
then cover the battery with  
the battery cap.  
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)  
412  
5-3. Owner Maintenance  
7
Close the cover.  
8
Reinsert the auxiliary key.  
NOTICE  
●Make sure the battery is installed correctly. Battery leakage could occur if it  
is not installed correctly.  
●When replacing the battery, be careful not to touch any of the internal cir-  
cuitry and electrical terminals, bend the electrical terminals, or get dirt in  
the smart key as the smart key could be damaged.  
●There is the danger of explosion if the battery is not correctly replaced.  
●Dispose of used batteries according to the following instructions.  
• Insulate the plus and minus terminals of the battery using cellophane or  
equivalent tape.  
• Never disassemble.  
• Never throw the battery into fire or water.  
• Never deform or crush.  
●Replace only with the same type battery (CR2025 or equivalent).  
●Be careful not to allow the rubber ring  
shown in the figure to be scratched or  
Rubber ring  
damaged.  
●If the rubber ring detaches, reattach it  
before inserting a new battery.  
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)  

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