2015 TOYOTA SIENNA key battery

5588-2. Steps to take in an emergency
SIENNA_OM_01999-08001_(U)
InteriorbuzzerExterior buzzerWarning messageDetails/Actions

Power was turned off due to the
automatic power off function.
 Next time when starting
the engine, increase the
engine speed slightly and
maintain that level for
approximately 5 minutes
to recharge the battery.
Con-
tinu-
ous  The driver’s door was opened
while any shift position other
than P was selected without
turning off the engine switch.

Shift the shift position to P.
Con-
tinu-
ousContin-
uous
The electronic key was carried
outside the vehicle and the
driver’s door was opened and
closed while any shift position
other than P was selected with-
out turning off the engine
switch.
Shift the shift position to P.
 Bring the electronic key
back into the vehicle.
Once  An attempt was made to start
the engine without the elec-
tronic key being present, or the
electronic key was not function-
ing normally.

Start the engine with the
electronic key present.
An attempt was made to drive
when the regular key was not
inside the vehicle.
 Confirm that the elec-
tronic key is inside the
vehicle.
(Flashes)
(Displayed alternately)
(Flashes)
(Flashes)

5618-2. Steps to take in an emergency
SIENNA_OM_01999-08001_(U)
8
When trouble arises
■Messages displays
The message illustrations used are intended as examples, and may differ
from the image that is actually displayed on the multi-information display.
■ Warning buzzer
P. 542
Once
The driver’s door was opened
and closed with the engine
switch turned off and then the
engine switch was put in
ACCESSORY mode twice with-
out the engine being started.
 Press the engine switch
while depressing the brake
pedal.
During a engine starting proce-
dure in the event that the elec-
tronic key was not functioning
properly ( P. 581), the engine
switch was touched with the
electronic key.
 Press the engine switch
within 10 seconds of the
buzzer sounding.
Once
The steering lock could not be
released within 3 seconds of
the engine switch being
pressed.
Press the engine switch
while depressing the brake
pedal and moving the
steering wheel left and
right.
Once
The electronic key has a low
battery.
Replace the electronic key
battery. ( P. 503)
Interior
buzzerExterior buzzerWarning messageDetails/Actions
(Flashes)
(Flashes)

578
SIENNA_OM_01999-08001_(U)
8-2. Steps to take in an emergency
If the engine will not start
One of the following may be the cause of the problem:
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
● The engine may be flooded.
Try to restart the engine again following correct starting procedures.
( P. 223, 226)
● There may be a malfunction in the engine immobilizer system.
( P. 75)
One of the following may be the cause of the problem:
● The battery may be discharged. ( P. 583)
● The battery terminal connections may be loose or corroded.
The engine starting system may be malfunctioning due to an electrical
problem such as an electronic key battery depletion or a blown fuse.
However, an interim measure is available to start the engine.
(  P. 579)
If the engine will not start even though correct starting proce-
dures are being followed ( P. 223, 226), consider each of the fol-
lowing points:
The engine will not start even though the starter motor operates
normally.
The starter motor turns over slowly, the interior lights and head-
lights are dim, or the horn does not sound or sounds at a low
volume.
The starter motor does not turn over (vehicles with a smart key
system)

5798-2. Steps to take in an emergency
SIENNA_OM_01999-08001_(U)
8
When trouble arises
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. 583)
● There may be a malfunction in the steering lock system (vehicle
with a smart key system).
Contact your Toyota dealer if the problem cannot be repaired, or if repair
procedures are unknown.
When the engine does not start, the following steps can be used as an
interim measure to start the engine if the engine switch is functioning
normally:
Set the parking brake.
Shift the shift lever to P.
Turn the engine switch to ACCESSORY mode.
Press and hold the engine switch for about 15 seconds while
depressing the brake pedal firmly.
Even if the engine can be started using the above steps, the system
may be malfunctioning. Have the v ehicle inspected by your Toyota
dealer.
The starter motor does not turn ov er, the interior lights and head-
lights do not turn on, or the horn does not sound.
Emergency start function (vehicles with a smart key system)
1
2
3
4

581
SIENNA_OM_01999-08001_(U)
8
When trouble arises
8-2. Steps to take in an emergency
If the electronic key does not operate
properly (vehicles with a smar t key system)
Using the mechanical key
( P. 106) in order to perform
the following operations.
Locks all the doors
Unlocks the door(s)
Turning the key rearward unlocks
the driver’s door. Turning the key
once again within 3 seconds
unlocks the other doors.
Shift the shift lever to P and apply the brakes.
Touch the Toyota emblem side
of the electronic key to the
engine switch.
An alarm will sound to indicate that
the start function cannot detect the
electronic key that is touched to the
engine switch if any of the doors is
opened and closed while the key is
touched to the switch.
Press the engine switch within 10 seconds after the buzzer sounds,
keeping the brake pedal depressed.
In the event that the engine switch cannot be operated, contact your
Toyota dealer.
If communication between the electronic key and vehicle is
interrupted ( P. 119) or the electronic key cannot be used
because the battery is depleted, the smart key system and wire-
less remote control cannot be used. In such cases, the doors
can be opened or the engine can be started by following the pro-
cedure below.
Locking and unlocking the doors and key linked functions
1
2
Starting the engine
1
2
3

5828-2. Steps to take in an emergency
SIENNA_OM_01999-08001_(U)
■Stopping the engine
Shift the shift lever to P and press the engine 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. 503)
■ 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. 77)
■ Changing engine switch modes
Within 10 seconds of the buzzer sounding, release the brake pedal and press
the engine switch.
The engine does not start and modes will be changed each time the switch is
pressed. ( P. 227)
■ When the electronic key does not work properly
●Check if the battery-saving mode is set. If it is set, cancel the function.
(P. 144)
● Make sure that the smart key system has not been deactivated in the cus-
tomization setting. If it is off, turn the function on.
(Customizable features P. 623)

5848-2. Steps to take in an emergency
SIENNA_OM_01999-08001_(U)
Connect a positive jumper cable clamp to the positive (+) battery
terminal on your vehicle
Connect the clamp on the other end of the positive cable to the
positive (+) battery terminal on the second vehicle
Connect a negative cable clamp to the negative (-) battery termi-
nal on the second vehicle
Connect the clamp at the other end of the negative cable to a
solid, stationary, unpainted metallic point away from the battery
and any moving parts, as shown in the illustration.
Start the engine of the second vehicle. Increase the engine speed
slightly and maintain at that le vel for approximately 5 minutes to
recharge the batter y of your vehicle.
Vehicles with a smart key system only: Open and close any of the
doors of your vehicle with the engine switch off.
Maintain the engine speed of t he second vehicle and start the
engine of your vehicle by turni ng the engine switch to the “ON”
position (vehicles without a smart key system) or turning the engine
switch to IGNITION ON mode (v ehicles with a smart key system).
Once the vehicle’s engine has started, remove the jumper cables in
the exact reverse order from which they were connected.
To install the engine cover, conduct the removal procedure in
reverse. After installing, check that the fixed pins are inserted
securely.
Once the engine starts, have the vehicle inspected at your Toyota
dealer as soon as possible.1
2
3
4
4
5
6
7
8

5858-2. Steps to take in an emergency
SIENNA_OM_01999-08001_(U)
8
When trouble arises
■Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■ To prevent battery discharge
●Turn off the headlights and the audio system while the engine is off.
● Turn off any unnecessary electrical components when the vehicle is running
at a low speed for an extended period, such as in heavy traffic.
■ When the battery is removed or discharged
●The power sliding door (if equipped) must be initialized. ( P. 128)
● The power back door (if equipped) must be initialized. ( P. 137)
● Make sure that the key is not inside the vehicle when recharging or replac-
ing the battery. The key may be locked in the vehicle if the alarm is acti-
vated. ( P. 78)
■ Charging the battery
The electricity stored in the battery will discharge gradually even when the
vehicle is not in use, due to natural discharge and the draining effects of cer-
tain electrical appliances. If the vehicle is left for a long time, the battery may
discharge, and the engine may be unable to start. (The battery recharges
automatically during driving.)