TOYOTA 2010 Yaris - Manual (Page 347)

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5-2. Steps to take in an emergency
If the engine will not start
If the engine still does not start after following the correct starting
procedure (
→P. 129) or releasing the steering lock (→P. 130), confirm
the following points.
■ The engine will not start even when the starter motor oper-
ates normally.
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 engine may be flooded.
Try to restart the engine once more following correct starting
procedures. (
→P. 129)
● Vehicles with engine immobilizer system: There may be a
malfunction in the engine immobilizer system.
(
→P. 78)
■ The starter motor turns over slowly, 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 battery may be discharged. (→P. 341)
● The battery terminal connections may be loose or corroded.