2012 TOYOTA SIENNA stop start

696
4-3. Do-it-yourself maintenance
SIENNA_U (OM45477U)
Checking and replacing fuses
If any of the electrical components do not operate, a fuse may have
blown. If this happens, check and replace the fuses as necessary.
Vehicles without a smart key system
Turn the engine switch off.
Vehicles with a smart key system
Turn the “ENGINE START STOP” switch OFF.
Open the fuse box cover.
Engine compartment Push the tab in and lift the lid
off.
Driver’s side instrument panel Remove the lid.STEP1
STEP2

When trouble arises5
721
SIENNA_U (OM45477U)
5-1. Essential informationEmergency flashers ......... 722
If your vehicle needs to be towed ............................. 723
If you think something is wrong ............................. 727
Fuel pump shut off system ........................... 728 5-2. Steps to take in an
emergency
If a warning light turns on or a warning buzzer
sounds... ........................ 729
If a warning message is displayed ........................ 744
If you have a flat tire (vehicles with run-flat
tires) ............................... 745
If you have a flat tire (vehicles with standard
tires) ............................... 747
If the engine will not start ................................ 762
If the shift lever cannot be shifted from P ................. 764
If you lose your keys ........ 766
If the electronic key does not operate properly....... 767
If the battery is discharged ..................... 770
If your vehicle overheats .. 775
If the vehicle becomes stuck .............................. 778
If your vehicle has to be stopped in an
emergency ..................... 780

728
5-1. Essential information
SIENNA_U (OM45477U)
Fuel pump shut off system
Follow the procedure below to restart the engine after the system is
activated.
Vehicles without a smart key system
Turn the engine switch to the “ACC” or “LOCK” position.
Restart the engine.
Vehicles with a smart key system Turn the “ENGINE START STOP” switch to ACCESSORY
mode or turn it off.
Restart the engine.
NOTICE
■Before starting the engine
Inspect the ground under the vehicle.
If you find that fuel has leaked onto the ground, the fuel system has been
damaged and is in need of repair. Do not restart the engine.
To minimize the risk of fuel leakage when the engine stalls or when
an airbag inflates upon collision , the fuel pump shut off system
stops the supply of fuel to the engine.
STEP1
STEP2
STEP1
STEP2

740 5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
■If the tire pressure warning light frequently comes on after blinking
for 1 minute
Vehicles without a smart key system
If the tire pressure warning light frequently comes on after blinking 1
minute when the engine switch is turned to the “ON” position, have it
checked by your Toyota dealer.
Vehicles with a smart key system
If the tire pressure warning light frequently comes on after blinking 1
minute when the “ENGINE START STOP” switch is turned to IGNITION
ON mode, have it checked by your Toyota dealer.
■ Customization that can be co nfigured at Toyota dealer
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features P. 815) However, Toyota recommends that the
seat belt reminder buzzer be operational to alert the driver and front passen-
ger when seat belts are not fastened.

5
When trouble arises
763
5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
Emergency start function (vehicles with a smart key system)
When the engine does not start, the following steps can be used as
an interim measure to start the engine if the “ENGINE START STOP”
switch is functioning normally: Set the parking brake.
Shift the shift lever to P.
Turn the “ENGINE START STOP” switch to ACCESSORY
mode.
Press and hold the “ENGINE START STOP” switch for about
15 seconds while depressing the brake pedal firmly.
Even if the engine can be start ed using the above steps, the system
may be malfunctioning. Have the vehicle inspected by your Toyota
dealer.
■ The starter motor does not turn over, the interior lights and
headlights do not turn on, or the horn does not sound.
One of the following may be the cause of the problem:
● One or both of the battery terminals may be disconnected.
● The battery may be discharged. ( P. 770)
● There may be a malfunction in the steering lock system (vehi-
cle with a smart key system).
Contact your Toyota dealer if the problem cannot be repaired, or if
repair procedures are unknown.
STEP1
STEP2
STEP3
STEP4

764
5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
If the shift lever cannot be shifted from P
If the shift lever cannot be shifted with your foot on the brake pedal,
there may be a problem with the shift lock system (a system to pre-
vent accidental operation of the shift lever). Have the vehicle
inspected by your Toyo ta dealer immediately.
The following steps may be used as an emergency measure to
ensure that the shift lever can be shifted:
Set the parking brake.
Vehicles without a smart ke y system: Turn the engine
switch to the “ACC” position.
Vehicles with a smart key system: Turn the “ENGINE
START STOP” switch to ACCESSORY mode.
Depress the brake pedal.
Pry the cover up with a flat-
head screwdriver or equiva-
lent tool.
Press the shift lock override
button.
The shift lever can be shifted
while the button is pressed.
STEP1
STEP2
STEP3
STEP4
STEP5

768 5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
Changing “ENGINE START STOP” switch modes and starting the
engine
Shift the shift lever to P and apply the brakes. Touch the Toyota emblem side of
the electronic key to the
“ENGINE START STOP” switch.
An alarm will sound to indicate
that the start function cannot
detect the electronic key that is
touched to the “ENGINE START
STOP” switch if any of the doors
is opened and closed while the
key is touched to the switch.
To change “ENGINE START STOP” switch modes: Within 10
seconds of the buzzer soundin g, release the brake pedal and
press the “ENGINE START STOP” switch. Modes can be
changed each time the sw itch is pressed. (P. 231)
To start the engine: Press the “ENGINE START STOP” switch
within 10 seconds after the buz zer sounds, keeping the brake
pedal depressed.
In the event that the “ENGINE START STOP” switch cannot be oper-
ated, contact your Toyota dealer.
STEP1
STEP2
STEP3

5
When trouble arises
769
5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
■
Stopping the engine
Shift the shift lever to P and press the “ENGINE START STOP” switch as
you normally do when stopping the engine.
■ Replacing the key battery
As this above procedure is a temporary measure, it is recommended that the
electronic key battery be replaced immediately when the battery depletes.
(P. 693)
■ Alarm (if equipped)
Using the mechanical key to lock the doors will not set the alarm system.
If a door is unlocked using the mechanical key when the alarm system is set,
the alarm may be triggered. ( P. 162)