TOYOTA 2010 Sienna - Manual (Page 495)

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4-3. Do-it-yourself maintenance
Wireless remote control battery
Replace the battery with a new one if it is discharged.
■
You will need the following:
Lithium battery (CR2032)
■
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.
STEP 1
STEP 2