If The Vehicle Battery Is Discharged - Toyota Yaris Owner's Manual

If the vehicle battery is discharged

The following procedures may be used to start the engine if the
vehicle's battery is discharged.
You can also call any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional.
If you have a set of jumper (or booster) cables and a second vehicle
with a 12-volt battery, you can jump start your vehicle by following the
steps below.
1
Open the hood. (P. 328)
2
Connect the jumper cables according to the following procedure:
1KR-FE engine
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8-2. Steps to take in an emergency
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8