TOYOTA 2012 Tacoma - Manual (Page 444)

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4-3. Do-it-yourself maintenance
Wireless remote control battery
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∗
: If equipped
Replace the battery with a new one if it is discharged.
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You will need the following items:
Lithium battery CR2032
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Replacing the battery
Remove the cover using a
coin protected with tape etc.
Remove the discharged trans-
mitter battery.
Insert a new battery with the
“+” terminal facing up.