Page 380 of 520
380 4-3. Do-it-yourself maintenance
NOTICE
■Replacing tire pressure warning valves and transmitters
●Because tire repair or replacement may affect the tire pressure
warning valves and transmitters, make sure to have tires serviced by
your Toyota dealer or other qualified service shop. In addition, make
sure to purchase your tire pressure warning valves and transmitters at
your Toyota dealer.
●Ensure that only genuine Toyota wheels are used on your vehicle.
Tire pressure warning valves and transmitters may not work properly
with non-genuine wheels.
Page 396 of 520
396 4-3. Do-it-yourself maintenance
17 WASHER15 AWindshield washer, rear window
washer
18 ECU-IG1 1 10 A Electronically controlled brake sys-
tem, tire pressure warning system,
air conditioning system, main body
ECU, anti-glare inside rear view
mirror, Vehicle Proximity Notifica-
tion System, navigation system
19 ECU-IG1 2 10 A Emergency flashers, rear window
defogger, air conditioning system
20 OBD 7.5 A On-board diagnosis system
21 STOP 10 AStop/tail lights, high mounted stop-
light
22 CHRG IND 7.5 A Charging indicator
23 DOOR 25 A Power windows
24 ACC-MAIN 25 A ACC-B, P/OUT, DCM
FuseAmpereCircuit
Page 411 of 520
When trouble arises5
411
5-1. Essential informationEmergency flashers ......... 412
If your vehicle needs to be towed ........................ 413
If you think something is wrong ......................... 416
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds... ....................... 417
If a warning message is displayed........................ 427
If you have a flat tire......... 447
If the EV (Electric Vehicle) system will not start ....... 465
If you lose your keys ........ 467
If the electronic key does not operate
properly .......................... 468
If the vehicle 12-volt battery is discharged ...... 470
If your vehicle overheats ....................... 475
If the vehicle becomes stuck .............................. 477
If your vehicle has to be stopped in an
emergency ..................... 479
Page 417 of 520

5
When trouble arises
417
5-2. Steps to take in an emergency
If a war ning light turns on or a war ning buzzer sounds...
Stop the vehicle immediately. Continuing to drive the vehicle
may be dangerous.The following warning indicates a possible problem in the brake sys-
tem. Immediately stop the vehicle in a safe place and contact your
Toyota dealer.
*: Brake system warning buzzer:
When there is a possible problem that could affect braking performance, the
warning light will come on and a warning buzzer may sound.
Parking brake engaged warning buzzer:
P. 433
Warning lightWarning light/Details
(Red) Brake system warning light (warning buzzer)*
• Low brake fluid
• Malfunction in the brake system
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released the system is operating normally.
■ Brake system warning light operation
Although depressing the brake pedal repeatedly may cause the red brake
system warning light to turn on and the buzzer to sound, this does not indi-
cate a malfunction.
Calmly perform the following actio ns if any of the warning lights
comes on or flashes. If a light comes on or flashes, but then goes
off, this does not necessarily indicate a malfunction in the system.
However, if this continues to o ccur, have the vehicle inspected by
your Toyota dealer.
Page 418 of 520

418 5-2. Steps to take in an emergency
Stop the vehicle immediately.The following warning indicates the possibility of damage to the vehi-
cle that may lead to an accident. Immediately stop the vehicle in a
safe place and contact your Toyota dealer.
Have the vehicle inspected by your Toyota dealer immediately.Failure to investigate the cause of the following warnings may lead to
the system operating abnormally and possibly cause an accident.
Have the vehicle inspected by your Toyota dealer immediately.
Warning lightWarning light/Details
12-volt battery chargi ng system warning light
Indicates a malfunction in the vehicle’s 12-volt battery
charging system.
Warning lightWarning light/Details
SRS warning light
Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system.
“ABS” warning light
Indicates a malfunction in:
• The ABS;
• The brake assist system.
Electric power steering system warning light (warning
buzzer) Indicates a malfunction in the EPS (Electric Power Steer-
ing) system
Slip indicator light
Indicates a malfunction in:
• The VSC;
• The TRAC;
• The hill-start assist control
Page 419 of 520

5
When trouble arises
419
5-2. Steps to take in an emergency
Follow the correction procedures.
After taking the specified steps to correct the suspected problem,
check that the warning light goes off.
(Yellow) Brake system warning light
Indicates a malfunction in:
• The regenerative brake system; or
• The electronically controlled brake system
(Flashing) Cruise control indicator light
Indicates a malfunction in the cruise control system
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)*
1
Indicates that a door is
not fully closed Check that all the doors
are closed.
SOC (State of Charge)
warning light The amount of charge
remaining in the traction
battery has fallen to the
SOC gauge’s 2 lowest
segments Charge the vehicle.
(Yellow) Plug-in indicator
Indicates a malfunction
with the charging cable. Reconnect the charging
cable.
If the warning light
does not go off even
after reconnecting the
charging cable, contact
your Toyota dealer.
Warning lightWarning light/Details
Page 420 of 520
420 5-2. Steps to take in an emergency
(Flash quickly)Charging indicator
Indicates a malfunction in
the charging system
P. 5 9
Output control warning
light (warning buzzer) EV system power avail-
able is low (due to the
amount of charge remain-
ing in the traction battery
being low, or low temper-
ature or high tempera-
ture) Charge the vehicle.
Seat belt reminder light
(warning buzzer)*
2
Warns the driver/front
passenger to fasten his/
her seat belt. Fasten the seat belt.
Master warning light A buzzer sounds and the
warning light comes on
and flashes to indicate
that the master warning
system has detected a
malfunction.
P. 4 2 7
Warning lightWarning light/DetailsCorrection procedure
Page 421 of 520

5
When trouble arises
421
5-2. Steps to take in an emergency
*1: Open door warning buzzer
P. 433
*
2: Driver's and front passenger’s seat belt warning buzzers The driver’s and front passenger’s seat belt warning buzzers sound to alert
the driver and front passenger that his or her seat belt is not fastened. The
buzzer sounds intermittently for 10 seconds after the vehicle has reached a
speed of 12 mph (20 km/h). Then, if the seat belt is still unfastened, the
buzzer will sound at a different tone for 20 more seconds.
Tire pressure warning
light
When the light comes on:
Low tire inflation pressure
such as
• Natural causes ( P. 422)
• Flat tire ( P. 447) Adjust the tire inflation
pressure (including the
spare tire) to the speci-
fied level.
The light will turn off
after a few minutes. In
case the light does
not turn off even if the
tire inflation pressure
is adjusted, have the
system checked by
your Toyota dealer.
When the light comes on
after blinking for 1 minute:
Malfunction in the tire
pressure warning system
( P. 423) Have the system
checked by your
Toyota dealer.
Warning lightWarning light/DetailsCorrection procedure