TOYOTA 2010 Prius - Manual (Page 560)

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5-2. Steps to take in an emergency
If the hybrid system will not start
If the hybrid system still does not start after following the correct
starting procedure (
→
P. 164), confirm the following points.
■
The hybrid system will not start even if you are carrying the
correct key.
One of the following may be the cause of the problem.
● There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
● The electronic key battery may be discharged. (→P. 541)
● The hybrid system may be malfunctioning due to an electrical
problem such as an open circuit or a blown fuse. However,
depending on the type of malfunction, an interim measure is
available to start the hybrid system. (
→P. 539)
● There may be a malfunction in the immobilizer system.
(
→P. 108)
■
The interior lights and headlights are dim, or the horn does
not sound or sounds at a low volume.
One of the following may be the cause of the problem.
● The 12 volt battery may be discharged. (→P. 543)
● The 12 volt battery terminal connections may be loose or cor-
roded.