2014 Lexus IS300h fuse

4397-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53C61E)
■12-volt battery
→P. 4 4 7
Engine compartment
Power control unit coolant reser-
voir (→P. 444)
Engine oil level dipstick
(→P. 4 4 0 )
Engine coolant reservoir
(→P. 444)
Engine oil filler cap
(→P. 4 4 1 )Fuse box (→P. 4 74 )
Wa s h e r f l u i d t a n k (→P. 4 4 6 )
Electric cooling fans
Condenser (→P. 4 4 6 )
Power control unit coolant
radiator (→P. 4 4 6 )
Engine coolant radiator
(→P. 4 4 6 )1
2
3
4
5
6
7
8
9
10
IS300h_EE_OM53C61E.book 439 ページ ２０１４年５月２０日　火曜日　午後５時４０分

4747-3. Do-it-yourself maintenance
IS300h_EE(OM53C61E)
Turn the power switch off.
Open the fuse box cover.
XEngine compartment:
Remove the clips.
Push the tabs on either side to
detach the lock and lift the lid off
while pulling the lock plate.
When installing the lid, check that the
lock plate and the tabs on either side
are connected correctly.
Checking and replacing fuses
If any of the electrical components do not operate, a fuse may have blown. If
this happens, check and replace the fuses as necessary.
1
2
IS300h_EE_OM53C61E.book 474 ページ ２０１４年５月２０日　火曜日　午後５時４０分

4757-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53C61E)
XLeft side instrument panel (left-hand drive vehicles)
Remove the lid.
XLeft side instrument panel (right-hand drive vehicles)
Remove the lid.
Remove the fuse with the pullout
tool.
Only type A fuses can be removed
using the pullout tool.
3
IS300h_EE_OM53C61E.book 475 ページ ２０１４年５月２０日　火曜日　午後５時４０分

4767-3. Do-it-yourself maintenance
IS300h_EE(OM53C61E)
Check if the fuse is blown.
Normal fuse
Blown fuse
Ty p e A a n d B :
Replace the blown fuse with a new fuse of an appropriate amperage rating. The
amperage rating can be found on the fuse box lid.
Type C and D:
Contact any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
4
1
2
XTy p e AXTy p e B
XTy p e CXTy p e D
IS300h_EE_OM53C61E.book 476 ページ ２０１４年５月２０日　火曜日　午後５時４０分

4777-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53C61E)
■After a fuse is replaced
●If the lights do not turn on even after the fuse has been replaced, a bulb may need
replacement. (→P. 4 7 8 )
●If the replaced fuse blows again, have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
■If there is an overload in a circuit
The fuses are designed to blow, protecting the wiring harness from damage.
■When replacing light bulbs
Lexus recommends that you use genuine Lexus products designed for this vehicle.
Because certain bulbs are connected to circuits designed to prevent overload, non-gen-
uine parts or parts not designed for this vehicle may be unusable.
CAUTION
■To prevent system breakdowns and vehicle fire
Observe the following precautions.
Failure to do so may cause damage to the vehicle, and possibly a fire or injury.
●Never use a fuse of a higher amperage rating than that indicated, or use any other
object in place of a fuse.
●Always use a genuine Lexus fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix.
●Do not modify the fuses or fuse boxes.
■Fuse box near the power control unit
Never check or replace the fuses as there are high voltage parts and wiring near the
fuse box.
Doing so may cause electric shock, resulting in death or serious injury.
NOTICE
■Before replacing fuses
Have the cause of electrical overload determined and repaired by any authorized
Lexus dealer or repairer, or another duly qualified and equipped professional as soon
as possible.
IS300h_EE_OM53C61E.book 477 ページ ２０１４年５月２０日　火曜日　午後５時４０分

5418-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53C61E)
One of the following may be the cause of the problem:
●The electronic key may not be functioning properly. (→P. 545)
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●There may be a malfunction in the immobilizer system. (→P. 9 0 )
●There may be a malfunction in the steering lock system.
●The hybrid system may be malfunctioning due to an electrical problem such
as electronic key battery depletion or a blown fuse. However, depending on
the type of malfunction, an interim measure is available to start the hybrid sys-
tem. (→P. 5 4 2 )
One of the following may be the cause of the problem:
●The 12-volt battery terminal connections may be loose or corroded.
●The 12-volt battery may be discharged. (→P. 5 4 7 )
If the hybrid system will not start
Reasons for the hybrid system not starting vary depending on the situation.
Check the following and perform the appropriate procedure:
The hybrid system will not start even though the correct starting proce-
dure is being followed. (→P. 209)
The interior lights and headlights are dim, or the horn does not sound or
sounds at a low volume.
IS300h_EE_OM53C61E.book 541 ページ ２０１４年５月２０日　火曜日　午後５時４０分

597Alphabetical index
IS300h_EE(OM53C61E)
Fuel .............................................................. 241
Capacity .................................................562
Fuel gauge.............................................. 109
Information ..............................................571
Refueling .................................................. 241
Type ................................................241, 562
Warning light ...................................... 505
Fuel consumption .................................. 124
Average fuel economy ...................... 116
Current fuel consumption................ 116
Fuel filler door ......................................... 241
If the fuel filler door
cannot be opened ......................... 243
Refueling .................................................. 241
Fuel gauge ................................................ 109
Fuses .......................................................... 474
Gauges ...................................................... 109
Glove box ................................................. 414
Glove box light ....................................... 414Hands-free system
(for cellular phone) ........................... 367
Head restraints ........................................ 173
Headlight cleaner................................. 235
Headlights ............................................... 226
Automatic High Beam
system...................................................229
Discharge headlights
precautions ......................................... 491
Follow me home system................. 227
Light switch............................................226
Replacing light bulbs ....................... 490
Wattage ................................................. 570
Heaters ..................................................... 398
Air conditioning system ................. 398
Heated steering wheel ................... 409
Outside rear view mirrors ............ 404
Seat heaters............................................ 410
Hill-start assist control ........................ 286
High-voltage components .................. 83
Hood .......................................................... 437
Open ........................................................437
Pop Up Hood ........................................ 56
G
H
IS300h_EE_OM53C61E.book 597 ページ ２０１４年５月２０日　火曜日　午後５時４０分

604Alphabetical index
IS300h_EE(OM53C61E)
Rear view mirror
Inside rear view mirror......................178
Outside rear view mirrors.............. 180
Rear view monitor system................. 274
Rear window defogger ..................... 404
Refueling ................................................... 241
Capacity .................................................562
Fuel types ...............................................562
If the fuel filler door cannot
be opened ......................................... 243
Opening the fuel tank cap ............ 243
Regenerative braking ............................. 81
Remote Touch
*
Replacing
Electronic key battery........................ 471
Fuses ........................................................ 474
Light bulbs............................................. 478
Tires ..........................................................459
Rev indicator.............................................. 117
Rev peak ...................................................... 117
Road accident cautions......................... 87
Run-flat tires ............................................540Seat belt reminder light ..................... 505
Seat belts..................................................... 38
Adjusting the seat belt ....................... 39
Child restraint system
installation ..............................................70
Cleaning and maintaining
the seat belt......................................... 431
Emergency Locking
Retractor (ELR) ................................. 40
How to wear your seat belt ............ 38
How your child should wear
the seat belt.......................................... 40
Pregnant women, proper
seat belt use ........................................... 41
Reminder light and
buzzer..................................................505
Seat belt pretensioners...................... 39
SRS warning light .............................. 504
S
IS300h_EE_OM53C61E.book 604 ページ ２０１４年５月２０日　火曜日　午後５時４０分