2012 TOYOTA SIENNA engine

228 2-1. Driving procedures
SIENNA_U (OM45477U)
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 when driving
Do not turn the engine switch to the “LOCK” position while driving. If, in an
emergency, you must turn the engine off while the vehicle is moving, turn the
engine switch only to the “ACC” position to stop the engine. An accident may
result if the engine is stopped while driving.
NOTICE
■To prevent battery discharge
Do not leave the engine switch in the “ACC” or “ON” position for long periods
of time without the engine running.
■ When starting the engine
● Do not crank the engine for more than 30 seconds at a time. This may
overheat the starter and wiring system.
● Do not race a cold engine.
● If the engine becomes difficult to start or stalls frequently, have the engine
checked immediately.

229
2-1. Driving procedures
2
When driving
SIENNA_U (OM45477U)
Engine (ignition) switch (vehicles with smar t key system)
Performing the following operations when carrying the electronic
key on your person starts the engine or changes “ENGINE START
STOP” switch modes.
■ Starting the engine
Check that the parking brake is set.
Check that the shift lever is set in P.
Firmly depress the brake pedal.
The “ENGINE START STOP” switch indicator will turn green. If
the indicator does not turn green, the engine cannot be started.
Press the “ENGINE START
STOP” switch.
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 com-
pletely started.
The engine can be started
from any “ENGINE START
STOP” switch mode.
STEP1
STEP2
STEP3
STEP4

230 2-1. Driving procedures
SIENNA_U (OM45477U)
■Stopping the engine
Stop the vehicle.
Shift the shift lever to P.
Set the parking brake. ( P. 242)
Press the “ENGINE START STOP” switch.
Release the brake pedal and check that the indicator on the
“ENGINE START STOP” switch is off.
STEP1
STEP2
STEP3
STEP4
STEP5

231
2-1. Driving procedures
2
When driving
SIENNA_U (OM45477U)
■
Changing “ENGINE START STOP” switch modes
Modes can be changed by pressing the “ENGINE START
STOP” switch with the brake pedal released. (The mode
changes each time the switch is pressed.)
Off
*
Emergency flashers can be
used.
ACCESSORY mode
Some electrical components
such as the audio system can
be used.
The “ENGINE START STOP”
switch indicator turns amber.
IGNITION ON mode
All electrical components can
be used.
The “ENGINE START STOP”
switch indicator turns amber.
*: If the shift lever is in a positionother than P when turning off
the engine, the “ENGINE
START STOP” switch will be
turned to ACCESSORY mode,
not to OFF.

232 2-1. Driving procedures
SIENNA_U (OM45477U)
When stopping the engine with the shift lever in a position other
than PIf the engine is stopped with the sh ift lever in a position other than P,
the “ENGINE START STOP” switch will not be turned off but instead
be turned to ACCESSORY mode. Perform the following procedure to
turn the switch off:
Check that the parking brake is set.
Shift the shift lever to P.
Check that the indicator on the “ENGINE START STOP”
switch is illuminated in amber and then press the “ENGINE
START STOP” switch once.
Check that the indicator on the “ENGINE START STOP”
switch is 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
START STOP” switch will automatically turn off. However, this function can-
not entirely prevent battery discharge. Do not leave the vehicle with the
“ENGINE START STOP” switch in ACCESSORY or IGNITION ON mode for
long periods of time when the engine is not running.
■ Operation of the “ENG INE START STOP” switch
When operating the “ENGINE START STOP” switch, one short, firm press is
enough. If the switch is pressed improperly, the engine may not start or the
“ENGINE START STOP” switch mode may not change. It is not necessary to
press and hold the switch.
STEP1
STEP2
STEP3
STEP4

233
2-1. Driving procedures
2
When driving
SIENNA_U (OM45477U)
■
Electronic key battery depletion
 P. 5 0
■ Conditions aff ecting operation
 P. 4 6
■ Note for the entry function
 P. 4 7
■ If the engine does not start
The engine immobilizer system may not have been deactivated. ( P. 159)
■ Steering lock
After turning the “ENGINE START STOP” switch off and opening and closing
the doors, the steering wheel will be locked due to the steering lock function.
Operating the “ENGINE START STOP” switch again automatically cancels
the steering lock.
■ When the steering lock cannot be released
■ Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, the motor may be sus-
pended if the engine is turned on and off repeatedly in a short period of time.
In this case, refrain from operating the engine. After about 10 seconds, the
steering lock motor will resume functioning.
The green indicator light on the “ENGINE
START STOP” switch will flash and a
message will be shown on the multi-infor-
mation display. Press the “ENGINE
START STOP” switch while turning the
steering wheel left and right.

234 2-1. Driving procedures
SIENNA_U (OM45477U)
■When the “ENGINE START STOP” switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by your
Toyota dealer immediately.
■ If the electronic key battery is depleted
 P. 693
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 the vehicle begins to slide due to engine failure or other circumstances, 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 acci-
dent, 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,
push and hold the “ENGINE START STOP” switch for more than 3 seconds.
However, do not touch the “ENGINE START STOP” 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.

235
2-1. Driving procedures
2
When driving
SIENNA_U (OM45477U)
NOTICE
■
To prevent battery discharge
● Do not leave the “ENGINE START STOP” switch in ACCESSORY or IGNI-
TION ON mode for long periods of time without the engine running.
● If the indicator on the “ENGINE START STOP” switch is illuminated, the
“ENGINE START STOP” switch is not off. When exiting the vehicle,
always check that the “ENGINE START STOP” switch is off.
● Do not stop the engine when the shift lever is in a position other than P. If
the engine is stopped in another shift lever position, the “ENGINE START
STOP” switch will not be turned off but instead be turned to ACCESSORY
mode. If the vehicle is left in ACCESSORY mode, battery discharge may
occur.
■ When starting the engine
● Do not race a cold engine.
● If the engine becomes difficult to start or stalls frequently, have the engine
checked immediately.
■ Symptoms indicating a malfunctio n with the “ENGINE START STOP”
switch
If the “ENGINE START STOP” seems to be operating somewhat differently
than usual, such as the switch sticking slightly, there may be a malfunction.
Contact your Toyota dealer immediately.