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5
When trouble arises
779
5-2. Steps to take in an emergency
SIENNA_OM_OM45472U_(U)
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. 786)
● 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
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5
When trouble arises
785
5-2. Steps to take in an emergency
SIENNA_OM_OM45472U_(U)
■
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. 709)
■ 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)
■ Changing “ENGINE START STOP” switch modes
Within 10 seconds of the buzzer sounding, release the brake pedal and
press the “ENGINE START STOP” switch.
The engine does not start and modes will be changed each time the switch
is pressed. ( P. 231)
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788 5-2. Steps to take in an emergency
SIENNA_OM_OM45472U_(U)
Start the engine of the second vehicle. Increase the engine
speed slightly and maintain at that level for approximately 5
minutes to recharge the battery of your vehicle.
Vehicles with a smart key system only: Open and close any
of the doors of your vehicle with the “ENGINE START
STOP” switch off.
Maintain the engine speed of the second vehicle and start
the engine of your vehicle by turning the engine switch to
the “ON” position (vehicles without a smart key system) or
turning the “ENGINE START STOP” switch to IGNITION
ON mode (vehicles with a smart key system).
Once the vehicle’s engine has started, remove the jumper
cables in the exact reverse or der from which they were con-
nected.
Vehicles with a 2GR-FE engine only: 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.STEP3
STEP4
STEP5
STEP6
STEP7
Page 863 of 876

863
Alphabetical index
SIENNA_OM_OM45472U_(U)
Electric power steering........... 329
Electronic key
If your electronic key
does not operate
properly .............................. 783
Emergency, in case of
If the back door opener is inoperative ........................... 86
If the electronic key
does not operate
properly .............................. 783
If the engine will not start...... 778
If the shift lever cannot be
shifted ................................ 780
If the vehicle has
discharged battery ............. 786
If the warning buzzer sounds... ........................... 745
If the warning light turns on .............................. 745
If the warning message is displayed ............................ 760
If you have a flat tire .... 761, 763
If you lose your keys............. 782
If you think something is wrong ................................. 743
If your vehicle becomes stuck................................... 794
If your vehicle has to be stopped in an emergency ................ 796
If your vehicle needs to be
towed ................................. 739
If your vehicle overheats ...... 791
Emergency flashers ................ 738 Engine
Accessory mode....................231
Compartment ........................671
Engine switch ................226, 229
Hood......................................667
How to start the engine .........................226, 229
Identification number .............801
If the engine will not start ......778
Ignition switch................226, 229
Overheating...........................791
Engine coolant
Capacity ................................806
Checking ...............................678
Preparing and checking before winter .......................367
Engine coolan t temperature
gauge ......................................244
Engine immobilizer system.....159
Engine oil Capacity ................................804
Checking ...............................673
Preparing and checking before winter .......................367
Engine switch ...................226, 229
EPS ............................................329
Event data recorder ...................27E