Toyota 4runner 2010 Instruction Manual page 525

Replacing the battery (vehicles with a smart key system)
■
STEP 1
STEP 2
STEP 3
4-3. Do-it-yourself maintenance
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.
4
529