Page 330 of 444
330 4-3. Do-it-yourself maintenance
20 EFI NO.310 AFuel tank system, multiport fuel
injection system/sequential multi-
port fuel injection system
21 IGCT No.2 10 A Hybrid system ECU, motor genera-
tor ECU
22 INV W/P 15 AHybrid system ECU, hybrid battery
(traction battery), DC/DC converter,
multiport fuel injection system/
sequential multiport fuel injection
system
23 S-HORN 7.5 A No circuit
24 A/F 20 A No circuit
25 MPX-B 10 A Gauges and meters
26 EFI NO.1 10 A Smart key system
27 HORN 10 A Horns
28 H-LP(RL) 15 A Right-hand headlight (low beam)
29 H-LP(LL) 15 A Left-hand headlight (low beam)
30 H-LP(RH) 15 A Right-hand headlight (high beam)
31 H-LP(LH) 15 A Left-hand headlight (high beam)
32 HTR 50 A Air conditioning system
33 HTR SUB2 50 A PTC heater
34 HTR SUB1 50 A PTC heater
35 RR DEF 50 ARear window defogger, “MIR HTR”
fuse
36 CDS FAN 40 A Electric cooling fan
37 RDI FAN 40 A Electric cooling fan
FuseAmpereCircuit
Page 334 of 444

334 4-3. Do-it-yourself maintenance
25 IGN10 AMultiport fuel injection system/
sequential multiport fuel injection
system, SRS airbag system, steer-
ing lock system, front passenger
occupant classification system,
smart key system, electronic throt-
tle control system
26 GAUGE NO.2 7.5 A Gauges and meters, clock
27 ECU-ACC 7.5 A Clock, main body ECU, shift lock
control system, outside rear view
mirrors, smart key system, starting
system
28 CIG 20 A No circuit
29 PWR OUTLET 20 A Power outlet
30 RADIO NO.2 7.5 A Audio system, navigation system
31 MIR HTR 10 A Outside rear view mirror defoggers
32 POWER 30 A Power windows
33 P/SEAT 30 A Power seat
■ After a fuse is replaced
●If the lights do not turn on even after the fuse has been replaced, a bulb
may need replacing. ( →P. 336)
● If the replaced fuse blows again, have the vehicle inspected by your
Toyota dealer.
■ If there is an overload in the circuits
The fuses are designed to blow before the entire wiring harness is damaged.
FuseAmpereCircuit
Page 341 of 444
When trouble arises5
341
5-1. Essential information .... 342If your vehicle needs to be towed ........................ 342
If you think something is wrong ............................. 345
Event data recorder ......... 346 5-2. Steps to take in an
emergency .................... 348
If a warning light turns on or a warning buzzer
sounds... ....................... 348
If a warning message is displayed........................ 357
If you have a flat tire......... 368
If the hybrid system will not start .......................... 378
If the shift lever cannot be shifted from P................. 380
If you lose your keys ........ 381
If the electronic key does not operate properly....... 382
If the vehicle’s 12-volt battery is discharged ...... 385
If your vehicle overheats ....................... 389
If the vehicle becomes stuck .............................. 393
Page 365 of 444
5
When trouble arises
365
5-2. Steps to take in an emergency
Follow the correction procedures.
After taking the specif ied steps to correct the suspected problem,
check that the warning light turns off.
Interior
buzzerExterior
buzzerWarning messageDetailsCorrection procedure
Once⎯ (Comes on for 8
seconds)
Indicates that
the electronic
key is not pres-
ent when the
“POWER”
switch is
pressed.
Confirm the
location of the
electronic key.
Once3 times
Indicates that a
door other than
the driver’s door
has been
opened and
closed with the
“POWER”
switch in any
mode other
than OFF and
the electronic
key outside of
the detection
area.
Confirm the
location of the
electronic key.
Page 366 of 444
366 5-2. Steps to take in an emergency
Once3 times
Indicates that
the driver’s door
has been
opened or
closed with the
shift lever in P,
the “POWER”
switch in any
mode other
than OFF and
the electronic
key outside of
the detection
area. Turn the
“POWER”
switch OFF or
confirm the
location of the
electronic key.
OnceContinuous
(Displayed alternately)
Indicates that
the driver’s door
has been
opened or
closed (with the
shift lever not in
P, the “POWER”
switch in any
mode other
than OFF and
the electronic
key outside of
the detection
area).
• Shift the shift
lever to P.
• Confirm the location of the
electronic key.
Once⎯
Indicates that
the key battery
is low.
Replace the
battery.
(
→P. 322)
Interior
buzzerExterior
buzzerWarning messageDetailsCorrection
procedure
Page 378 of 444

378
5-2. Steps to take in an emergency
If the hybrid system will not start
Reasons for the hybrid system not starting vary depending on the
situation. Check the following a nd perform the appropriate proce-
dure:
■ The hybrid system will not start, even though the correct
starting procedure is being followed. ( →P. 131)
One of the following may be the cause of the problem.
● The electronic key may not be functioning properly. ( →P. 382)
● There may be a malfunction in the immobilizer system.
(→ P. 8 3 )
● There may be a malfunction in the steering lock system.
● The hybrid system may be malfun ctioning due to an electrical
problem such as an open circuit or a blown fuse. However,
depending on the type of malf unction, an interim measure is
available to start the hybrid system. ( →P. 379)
■ The interior lights and headlight s are dim, or the horn does
not sound or sounds at a low volume.
One of the following may be the cause of the problem.
● The 12-volt battery may be discharged. ( →P. 385)
● The 12-volt battery terminal c onnections may be loose or cor-
roded.
Page 381 of 444
5
When trouble arises
381
5-2. Steps to take in an emergency
If you lose your keys
New genuine Toyota keys can be made by your Toyota dealer using
the other key and the key number stamped on your key number
plate.
Page 382 of 444
382
5-2. Steps to take in an emergency
If the electronic key does not operate properly
Locking and unlocking the doors and opening the trunk with the mechanical key
Doors
Locks all doors
Unlocks all doors
Turning the key rearward unlocks
the driver's door. Turning the key
once again unlocks the other
doors.
If communication between the elect ronic key and the vehicle is inter-
rupted ( →P. 40) or the electronic key cannot be used because the
battery is depleted, the smart key system and wireless remote con-
trol cannot be used. In such cases, the doors and trunk can be
opened or the hybrid system can be started by following the proce-
dure below.