2008 Toyota Prius Owners Manual - Page 474

5 -2 . St e ps t o t a k e in a n e m e rge nc y I f t he hybrid syst e m w ill not st a r t If the engine will not start even though correct starting procedures are being followed (→P. 130), consider each of the following points. n The hybrid system will not start even when the starter motor operates normally. One of the following may be the cause of the problem. l The electronic key battery may be discharged. (→P. 450) l The engine may be flooded. Try to restart the hybrid system once more following correct starting procedures. (P. 130) l There may be a malfunction in the immobilizer system. (→P. 81) n 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 12 volt battery may be discharged. (→P. 451) l The 12 volt battery terminal connections may be loose or corroded. n The interior lights and headlights do not turn on, or the horn does not sound One of the following may be the cause of the problem. l One or both of the 12 volt battery terminals may be disconnected. l The 12 volt battery may be discharged. (→P. 451) Contact your Toyota dealer if the problem cannot be repaired, or if repair procedures are unknown. 448 PRIUS_U_(L/O_0802)