TOYOTA 2011 Avalon - Manual (Page 518)

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5-2. Steps to take in an emergency
AVALON_U (OM41428U)
If the vehicle battery is discharged
The following procedures may be used to start the engine if the vehi-
cle’s battery is discharged.
You can call your Toyota dealer or qualified repair shop.
If you have a set of jumper (or booster) cables and a second vehi-
cle with a 12 volt battery, you can jump start your Toyota following
the steps below.
Connecting the jumper cables.
Positive (+) battery terminal on your vehicle.
Positive (+) battery terminal on the second vehicle.
Negative (-) battery terminal on the second vehicle.
Connect the jumper cable to ground on your vehicle as shown in
the illustration.