Toyota 2015 Corolla Owner's Manual page 436

Wireless remote control/electronic key bat-
tery
Replace the battery with a new one if it is depleted.
You will need the following items:
● Flathead screwdriver
● Small flathead screwdriver
● Lithium battery CR2016 (vehicles without a smart key system), or
CR2032 (vehicles with a smart key system)
Replacing the battery
Vehicles without a smart key system
Remove the cover.
1
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 sur-
face downward.
Remove the module.
2
COROLLA_TMMMS_TMMC_U (OM12F00U)
7-3. Do-it-yourself maintenance
463
7
: If equipped