Toyota Prius Owner's Manual page 570

5-2. Steps to take in an emergency
Starting the hybrid system
STEP 1
Depress the brake pedal.
STEP 2
STEP 3
Press the "POWER" switch within 10 seconds of the buzzer
sounding, keeping the brake pedal depressed.
In the event that the hybrid system still cannot be operated, contact
any authorized Toyota dealer or repairer, or another duly qualified
and equipped professional.
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Touch the Toyota emblem side of
the electronic key
"POWER" 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.
to the