For toyota fj cruiser vehicles that are older than ten years there are no codes available.
Toyota fj cruiser key battery replacement.
Slide out the old battery.
Use a screwdriver to pop out the back cover.
You will see the battery housing that you need to open up.
You will need to push inside all the 5 tabs.
They just need to be pushed in slightly to allow the black plastic to release.
My goals were to find a battery that would fit in the current location of the primary battery provide good starting characteristics supply plenty of current to the winch.
However programming is necessary.
With the goal of replacing my primary battery in the toyota fj cruiser with the best possible replacement i spent quite some time researching what battery would work best.
Remove the housing from inside the key shell.
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Install new cr2025 3 volt lithium battery.
Install the battery shell in reverse order.