Lexus 2012 RX450h Owner's Manual page 919

Changing "ENGINE START STOP" switch modes and starting the
engine (RX350)
Ensure that the shift lever is in P and depress the brake pedal.
STEP 1
STEP 2
To change "ENGINE START STOP" switch modes: Within 10
STEP 3
seconds of the buzzer sounding, release the brake pedal and
press the "ENGINE START STOP" switch. Modes can be
changed each time the switch is pressed. (P. 206)
To start the engine: Press the "ENGINE START STOP" switch
within 10 seconds of the buzzer sounding, keeping the brake
pedal depressed.
In the event that the "ENGINE START STOP" switch still cannot be oper-
ated, contact your Lexus dealer.
5-2. Steps to take in an emergency
Touch the Lexus emblem side of
the electronic
"ENGINE START STOP" switch.
If any of the doors is opened or
closed while the key is being
touched to the switch, an alarm will
sound to indicate that the start
function cannot detect the elec-
tronic key.
key to the
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