Page 461 of 584
4616-3. Do-it-yourself maintenance
6
Maintenance and care
●Flathead screwdriver
● Small flathead screwdriver
● Lithium battery CR2032
Release the lock and remove
the mechanical key.
Remove the key cover.
To prevent damage to the key,
cover the tip of the flathead screw-
driver with a rag.
Remove the depleted battery
using a small flathead screw-
driver.
When removing the cover, the
electronic key module may stick to
the cover and the battery may not
be visible. In this case, remove the
electronic key module in order to
remove the battery.
Insert a new battery with the “+” terminal facing up.
Electronic key batter y
Replace the battery with a n ew one if it is depleted.
You will need the following items:
Replacing the battery
1
2
3
Page 462 of 584

4626-3. Do-it-yourself maintenance
When installing the key cover and mechanical key, install by con-
ducting and with the directions reversed.
Operate the or switch and check that the doors can
be locked/unlocked.
■When replacing the key battery
Be careful not to lose the battery or any other small parts.
■ Use a CR2032 lithium battery
●Batteries can be purchased at your Toyota dealer, local electrical appliance
shops or camera stores.
● Replace only with the same or equivalent type recommended by the manu-
facturer.
● Dispose of used batteries according to local laws.
■ If the key battery is depleted
The following symptoms may occur:
●The smart key system and wireless remote control will not funct ion properly.
● The operational range will be reduced.
WARNING
■ Battery precautions
Observe the following precautions.
Failure to do so may result in death or serious injury.
● Do not swallow the battery. Doing so may cause chemical burns.
● A coin battery or button battery is used in the electronic key. If a battery is
swallowed, it may cause severe chemical burns in as little as 2 hours and
may result in death or serious injury.
● Keep away new and removed batteries from children.
● If the cover cannot be firmly closed, stop using the electronic key and stow
the key in the place where children cannot reach, and then contact your
Toyota dealer.
● If you accidentally swallow a battery or put a battery into a part of your
body, get emergency medical attention immediately.
■ To prevent battery explosion or leakage of flammable liquid or gas
● Replace the battery with a new battery of the same type. If a w rong type of
battery is used, it may explode.
● Do not expose batteries to extremely low pressure due to high altitude or
extremely high temperatures.
● Do not burn, break or cut a battery.
4
21
5
Page 469 of 584
469
7When trouble arises
7-1. Essential informationEmergency flashers .......... 470
If your vehicle has to be stopped in
an emergency ................. 471
If the vehicle is submerged or water on the road is
rising ............................... 472
7-2. Steps to take in an emergency
If your vehicle needs to be towed ..................... 474
If you think something is wrong .......................... 477
If a warning light turns on or a warning
buzzer sounds ................ 478
If a warning message is displayed ..................... 488
If you have a flat tire.......... 494
If the hybrid system will not start ........................... 505
If the electronic key does not operate
properly ........................... 507
If the 12-volt battery is discharged ................... 510
If your vehicle overheats ........................ 517
If the vehicle becomes stuck ............................... 521
Page 490 of 584

4907-2. Steps to take in an emergency
■Warning messages
The warning messages explained below may differ from the actual messages
according to operation conditions and vehicle specifications.
■ System warning lights
The master warning light does not come on or flash in the following cases.
Instead, a separate system warning light will come on along wit h a message
shown on the multi-information display.
● Malfunction in the ABS
The ABS warning light comes on. ( P. 479)
● Malfunction in the brake system
The brake system warning light (yellow) comes on. ( P. 478)
● Malfunction in the tire pressure warning system
The tire pressure warning light comes on. ( P. 482)
● Remaining fuel level is low
The low fuel level warning light comes on. ( P. 481)
■ If a message instructing to refer to the Owner’s Manual is disp layed
● If the following messages are shown, there may be a malfunction .
Immediately stop the vehicle in a safe place and contact your T oyota dealer.
Continuing to drive the vehicle may be dangerous.
• “Low Braking Power Stop in a Safe Place See Owner’s Manual”
• “Oil Pressure Low Stop in a Safe Place See Owner’s Manual”
• “Charging System Malfunction Stop in a Safe Place See Owner’s Man-
ual”
● If the following message is shown, there may be a malfunction.
Immediately have the vehicle inspected by your Toyota dealer.
• “Hybrid System Malfunction”
• “Check Engine”
• “Hybrid Battery System Malfunction”
• “Accelerator System Malfunction”
• “Smart Key System Malfunction”
● If “Engine Coolant Temp High Stop in a Safe Place See Owner’s Manual” is
displayed, follow the instructions accordingly. ( P. 517)
● If “Maintenance Required for Traction Battery Cooling Parts See Owner’s
Manual” is displayed, follow the instructions accordingly. ( P. 456)
Page 492 of 584

4927-2. Steps to take in an emergency
■If “Auto Power Off to Con serve Battery” is displayed
Power was turned off due to the automatic power off function.
Next time when starting the hybrid system, operate the hybrid s ystem for
approximately 5 minutes to recharge the 12-volt battery.
■ If “A New Key has been Registered Contact Your Dealer for Detai ls” is
displayed
This message will be displayed each time the driver’s door is opened when
the doors are unlocked from the outside for approximately one week after a
new electronic key has been registered.
If this message is displayed but you have not had a new electro nic key regis-
tered, ask your Toyota dealer to check if an unknown electronic key (other
than those in your possession) has been registered.
■ When “Headlight System Malfunction Visit Your Dealer” is displa yed
The following systems may be malfunctioning. Have the vehicle i nspected by
your Toyota dealer immediately.
● The LED headlight system
● AHB (Automatic High Beam)
■ If “Radar Cruise Control Unavailable See Owner's Manual” is sho wn
The dynamic radar cruise control with full-speed range system is suspended
temporarily or until the problem shown in the message is resolv ed. (causes
and coping methods: P. 244)
■ If “Radar Cruise Control Unavailable” is shown
The dynamic radar cruise control with full-speed range system c annot be
used temporarily. Use the system when it becomes available agai n.
■ If a message that indicates the mal function of front camera is displayed
The following systems may be suspended until the problem shown in the
message is resolved.
● PCS (Pre-Collision System)
● LTA (Lane Tracing Assist)
● AHB (Automatic High Beam)
● RSA (Road Sign Assist) (if equipped)
● Dynamic radar cruise control with full-speed range
■ If a message that indicates the malfunction of radar sensor is displayed
The following systems may be suspended until the problem shown in the
message is resolved. ( P. 244, 478)
● PCS (Pre-Collision System)
● LTA (Lane Tracing Assist)
● Dynamic radar cruise control with full-speed range (if equipped )
Page 505 of 584

5057-2. Steps to take in an emergency
7
When trouble arises
One of the following may be the cause of the problem:
● The electronic key may not be functioning properly. (P. 508)
● There may not be sufficient f uel in the vehicle’s tank.
Refuel the vehicle.
● There may be a mal function in the immobilizer system.
( P. 86)
● There may be a malfunction i n the steering lock system.
● The hybrid system may be malfunc tioning due to an electrical prob-
lem such as electronic key battery depletion or a blown fuse. H ow-
ever, depending on the type of malfunction, an interim measure is
available to start the hybrid system. ( P. 506)
● The temperature of the hybrid battery (traction battery) may be
extremely low (below appro ximately -22°F [-30°C]). (P. 81, 202)
One of the following may be the cause of the problem:
● The 12-volt battery may be discharged. ( P. 510)
● The 12-volt battery terminal conn ections may be loose or corroded.
( P. 433)
If the hybrid system will not start
Reasons for the hybrid system not starting vary depending on
the situation. Check the followi ng and perform the appropriate
procedure:
The hybrid system will not start even though the correct starting
procedure is being followed. ( P. 200)
The interior lights and headlights are dim, or the horn does no t
sound or sounds at a low volume.
Page 507 of 584
5077-2. Steps to take in an emergency
7
When trouble arises
■Doors
Using the mechanical key (P.
139) in order to perform the fol-
lowing operations (driver’s door
only):
Locks all doors
Closes the windows and the
moon roof
*1 (turn and
hold)
*2
Unlocks the door
Turning the key rearward unlocks the driver's door. Turning the key once
again unlocks the other doors.
Opens the windows and the moon roof*1 (turn and hold)*2
*1: If equipped
*2: This setting must be customized at your Toyota dealer.
If the electronic key does not operate
properly
If communication between the electronic key and vehicle is
interrupted (P. 155) 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
and trunk can be opened and the hybrid system can be started
by following the procedure below.
Locking and unlocking the doors, unlocking the trunk and key
linked functions
1
2
3
4
Page 508 of 584
5087-2. Steps to take in an emergency
■Tr u n k
Turn the mechanical key clock-
wise to open.
Ensure that the shift lever is in P and firmly depress the brake
pedal.
Touch the Toyota emblem side
of the electronic key to the
power switch.
When the electronic key is
detected, a buzzer sounds and the
power switch will turn to ON mode.
When the smart key system is
deactivated in customization set-
ting, the power switch will turn to
ACCESSORY mode.
Firmly depress the brake pedal and check that is displayed
on the multi-information display.
Press the power switc h shortly and firmly.
In the event that the power swi tch still cannot be started, contact your
Toyota dealer.
Starting the hybrid system
1
2
3
4