Lexus 2012 RX450h Owner's Manual page 214

2-1. Driving procedures
Note for the entry function
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P. 70
If the hybrid system does not start
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The immobilizer system may not have been deactivated. (P. 147)
Contact your Lexus dealer.
Steering lock
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After turning the "POWER" switch off and opening and closing the doors, the
steering wheel will be locked due to the steering lock function. Operating the
"POWER" switch again automatically cancels the steering lock.
When the steering lock cannot be released
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Steering lock motor overheating prevention
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To prevent the steering lock motor from overheating, the motor may be suspended
if the hybrid system is turned on and off repeatedly in a short period of time. In this
case, refrain from operating the hybrid system. After about 2 seconds, the steering
lock motor will resume functioning.
When the "POWER" switch indicator flashes in amber
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The system may be malfunctioning. Have the vehicle inspected by your Lexus
dealer immediately.
If the "READY" indicator does not come on
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If the "READY" indicator does not come on when you press the "POWER" switch
with the shift lever in P and the brake pedal depressed, contact your Lexus dealer
immediately.
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The green indicator light on the "POWER"
switch will flash and a message will be shown
on the multi-information display. Press the
"POWER" switch again while turning the
steering wheel left and right.