TOYOTA 2011 Yaris Sedan - Manual (Page 332)

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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. 112) or releasing the steering lock (→P. 112), confirm
the following points.
n The engine will not start even when the starter motor oper-
ates normally.
One of the following may be the cause of the problem.
l There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
l The engine may be flooded.
Try to restart the engine once more following correct starting
procedures.
l Vehicles with engine immobilizer system: There may be a
malfunction in the engine immobilizer system.
(
→P. 63)
n 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.
l The battery may be discharged. (
→P. 326)
l The battery terminal connections may be loose or corroded.