Performing the following operations when carrying the electronic key on your person starts the engine or changes engine switch modes.
Starting the engine
The smart key system indicator light (green) will turn on. If the indicator light does not turn on, the engine cannot be started.
The engine will crank until it starts or for up to 30 seconds, whichever is less.
Continue depressing the brake pedal until the engine is completely started.
The engine can be started from any engine switch mode.

Stopping the engine
Changing engine switch modes
Modes can be changed by pressing the engine switch with the brake pedal released. (The mode changes each time the switch is pressed.)
Off*
The emergency flashers can be used.
The smart key system indicator light (green) off.
Accessory mode
Some electrical components such as the audio system can be used.
The smart key system indicator light (green) flashes slowly.

Ignition on mode
All electrical components can be used.
The smart key system indicator light (green) flashes slowly.
*: If the shift lever is in a position other than p when turning off the engine, the engine switch will be turned to accessory mode, not to off.
When stopping the engine with the shift lever in a position other than p
If the engine is stopped with the shift lever in a position other than p, the engine switch will not be turned off but instead be turned to accessory mode. Perform the following procedure to turn the switch off:
Auto power off function
If the vehicle is left in accessory or ignition on mode (the engine is not running) for more than an hour with the shift lever in p, the engine switch will automatically turn off. However, this function cannot entirely prevent battery discharge. Do not leave the vehicle with the engine switch in accessory or ignition on mode for long periods of time when the engine is not running.
Electronic key battery depletion
Conditions affecting operation
Notes for the entry function
If the engine does not start
Steering lock
After turning the engine switch off and opening and closing the doors, the steering wheel will be locked due to the steering lock function. Operating the engine switch again automatically cancels the steering lock.
When the steering lock cannot be released
The smart key system indicator light (green) will flash quickly.
Check that the shift lever is set in p. Press
the engine switch while turning the steering
wheel left and right. 
Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, the motor may be suspended if the engine is turned on and off repeatedly in a short period of time.
In this case, refrain from running the engine. After about 10 seconds, the steering lock motor will resume functioning.
When the smart key system indicator light flashes in yellow
The system may be malfunctioning. Have the vehicle inspected by your toyota dealer immediately.
If the electronic key battery is depleted
Operation of the engine switch
When operating the engine switch, one short, firm press is enough. If the switch is pressed improperly, the engine may not start or the engine switch mode may not change. It is not necessary to press and hold the switch.
If the smart key system has been deactivated in a customized setting
Caution
When starting the engine
Always start the engine while sitting in the driver’s seat. Do not depress the accelerator pedal while starting the engine under any circumstances.
Doing so may cause an accident resulting in death or serious injury.
Caution while driving
If engine failure occurs while the vehicle is moving, do not lock or open the doors until the vehicle reaches a safe and complete stop. Activation of the steering lock in this circumstance may lead to an accident, resulting in death or serious injury.
Stopping the engine in an emergency
If you want to stop the engine in an emergency while driving the vehicle, press and hold the engine switch for more than 2 seconds, or press it briefly 3 times or more in succession.
However, do not touch the engine switch while driving except in an emergency.
Turning the engine off while driving will not cause loss of steering or braking control, but the power assist to these systems will be lost. This will make it more difficult to steer and brake, so you should pull over and stop the vehicle as soon as it is safe to do so.
Notice
To prevent battery discharge
When starting the engine
Symptoms indicating a malfunction with the engine switch
If the engine switch seems to be operating somewhat differently than usual, such as the switch sticking slightly, there may be a malfunction. Contact your toyota dealer immediately.
Engine (ignition) switch
(vehicles without a
smart key system)Using the bluetooth® audio/phone
Audio unit
Bluetooth® connection condition
If “bt” is not displayed, the
bluetooth® audio/phone cannot
be used.
Displays set up menu
Selects items such as menu
and number
Turn: selects an item
Press: inputs the selected item
Off-hook switch
Turns the hands-free sy ...
Data list / active test
Read data list
Hint:
Using the intelligent tester's data list allows switch,
sensor, actuator and other item values to be read without
removing any parts. Reading the data list early in
troubleshooting is one way to save time.
Connect the intelligent tester to the dlc3.
Turn the igni ...
Catalyst system efficiency below threshold (bank 1)
Monitor description
The ecm uses sensors mounted in front of and behind the three-way catalytic
converter (twc) to
monitor its efficiency.
The first sensor, the air-fuel ratio (a/f) sensor, sends pre-catalyst
information to the ecm. The second
sensor, the heated oxygen (ho2) sensor, se ...