If The Hybrid System Will Not Start - Lexus RX450H Manual

5-2. Steps to take in an emergency

If the hybrid system will not start

Reasons for the hybrid system not starting vary depending on the situ-
ation. Check the following and perform the appropriate procedure:

The hybrid system will not start even though the correct start-
ing procedure is being followed. (P. 200)
One of the following may be the cause of the problem:
 The electronic key may not be functioning properly. (P.
610)
 There may be a malfunction in the immobilizer system.
(P. 134)
 There may be a malfunction in the steering lock system.
 The hybrid system may be malfunctioning due to an electri-
cal problem such as an open circuit or a blown fuse. How-
ever, depending on the type of malfunction, an interim
measure is available to start the hybrid system. (P. 607)

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. 613)
 The 12-volt battery terminal connections may be loose or
corroded.

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:
 One or both of the 12-volt battery terminals may be discon-
nected.
 The 12-volt battery may be discharged. (P. 613)
Contact any authorized Lexus dealer or repairer, or another duly
606
RX450h_EE