Vehicles With Smart Entry And Start System - Toyota IQ 2012 Owner's Manual

4-3. Do-it-yourself maintenance
Vehicles with smart entry & start system
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iQ_WE_74014E
Open the case cover using a
coin protected with tape etc.
and remove the depleted bat-
tery.
Insert a new battery with the
"+" terminal facing up.
Push the release button and
take out the mechanical key.
Remove the cover.