fuse LEXUS RX450h 2015 Owner's Manual

6984-3. Do-it-yourself maintenance
35
ECU-IG1 NO. 4 10 A Air conditioning system, rear window
defogger, electronically controlled
brake system, electric cooling fans36
BK/UP LP 7. 5 A Back-up lights37
ECU-IG1 NO. 5 15 A Air conditioning system38
ECU-IG1 NO. 6 10 A Head light cleaner, cruise control, air
conditioning system, Blind Spot Moni-
tor39
EFI NO. 2 10 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem40
F/ P M P 15 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem41
DEICER 25 A Windshield wipers and washer
42
STOP 7. 5 A Vehicle Proximity Notification System,
vehicle dynamics integrated manage-
ment, stop lights, multiport fuel injec-
tion system/sequential multiport fuel
injection system, shift lock control sys-
tem, starter system, cruise control43
TOW I N G BAT T 20 A44
TOW I N G 30 A Trailer lights45
FILTER 10 A
46
IG1 MAIN 30 A ECU-IG1 NO. 6, BK/UP LP, ECU-
IG1 NO. 5, ECU-IG1 NO. 4
47
H-LP RH HI 15 A Right-hand headlight (high beam)
48
H-LP LH HI 15 A Left-hand headlight (high beam)Fuse Ampere Circuit

6994-3. Do-it-yourself maintenance
4
Maintenance and care
■ Engine compartment (type C fuse box) 49
BIXENON 10 A50
H-LP RH LO 15 A Right-hand headlight (low beam)51
H-LP LH LO 15 A Left-hand headlight (low beam)52
HORN 10 A Horn53
A/F 20 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem54
S-HORN 7. 5 A S-HORN
Fuse Ampere Circuit1
ABS MAIN NO. 1 10 A Brake system
2
ABS MAIN
NO. 2 10 A Brake system
3
BATT FAN 15 A Battery cooling fan
4
OIL PMP 10 A Hybrid system
5
A/C W/P 10 A Air conditioning systemFuse Ampere Circuit

7004-3. Do-it-yourself maintenance
■ Driver’s side instrument panel
Fuse Ampere Circuit1
P/ P O I N T 15 A Po w e r o u t l e t2
ECU-ACC 10 A Navigation system, air conditioning
system, audio system, multiplex com-
munication system, multi-information
display, head-up display3
CIG 15 A Po w e r o u t l e t4
RADIO NO. 2 7. 5 A Audio system, navigation system
5
GAUGE NO. 1 10 A Emergency flashers, navigation sys-
tem, head-up display, air conditioning
system, Vehicle Proximity Notification
System, audio system
6
ECU-IG1 NO. 3 10 A Outside rear view mirror, windshield
wipers and washer, seat heaters,
starter system, power outlet, moon
roof, air conditioning system

7014-3. Do-it-yourself maintenance
4
Maintenance and care 7
ECU-IG1 NO. 1 10 A Multiplex communication system,
steering sensor, shift lock control sys-
tem, tilt and telescopic steering,
power back door, pre-collision sys-
tem, vehicle dynamics integrated
management, tire pressure warning
system8
S/ROOF 30 A Moon roof9
FUEL OPN 7. 5 A Fuel filler door opener10
PSB 30 A Pre-collision seat belt11
TI & TE 30 A Tilt and telescopic steering system12
DR LOCK 10 A13
FR FOG 7. 5 A Front fog lights14
P-S E AT L H 30 A Po w e r s e a t ( l e f t - s i d e )15
4WD 7. 5 A AW D s y s t e m16
INVERTER 20 A Po w e r o u t l e t17
RR FOG 7. 5 A18
D/L ALT B 25 A Multiplex communication system,
power door lock system, power back
door19
EPS 10 A Electric power steering system20
ECU-IG1 NO. 2 10 A Intuitive parking assist, pre-collision
seat belt, capacitor
21
PA N E L 10 A Switch illumination, navigation system,
hybrid transmission system, audio sys-
tem, multi-information display, air con-
ditioning system, multiplex
communication systemFuse Ampere Circuit

7024-3. Do-it-yourself maintenance
22
TA I L 10 A Parking lights, front side marker lights,
tail lights, license pl ate lights, front fog
lights, towing converter23
AIR SUS 20 A24
P-S E AT R H 30 A Power seat (right-side)25
OBD 7. 5 A On-board diagnosis26
FR DOOR 25 A Front power window (right-side), out-
side rear view mirror27
RR DOOR 25 A Rear power window (right-side)28
FL DOOR 25 A Front power window (left-side), out-
side rear view mirror29
RL DOOR 25 A Rear power window (left-side)30
FR WASH 25 A Windshield wipers and washer31
RR WIP 15 A Windshield wipers and washer32
RR WASH 20 A Windshield wipers and washer33
FR WIP 30 A Windshield wipers and washer
34
ECU IG2 10 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, front passenger occupant classi-
fication system, SRS airbag system,
stop lights, electronically controlled
brake system, steering lock system,
hybrid system35
GAUGE NO. 2 7. 5 A Gauge and meters36
RH S-HTR 15 A Seat heater (right-side)
37
LH S-HTR 15 A Seat heater (left-side)Fuse Ampere Circuit

7034-3. Do-it-yourself maintenance
4
Maintenance and care ■ Luggage compartment (type A fuse box)
■ Luggage compartment (type B fuse box) Fuse Ampere Circuit1
DCDC-S 7. 5 A Hybrid system2
CAPACITOR 10 A Capacitor
Fuse Ampere Circuit1
MAIN 180 A All electrical components2
RR-B 50 A CAPACITOR, DCDC-S3
EPS 80 A Hybrid system

7044-3. Do-it-yourself maintenance
■
After a fuse is replaced ●
If the lights do not turn on even afte r the fuse has been replaced, a bulb may
need replacement. (  P. 7 0 8 )●
If the replaced fuse blows again, have the vehicle inspected by your Lexus
dealer.■
If there is an overload in the circuit
The fuses are designed to blow, protecting the wiring harness from damage.
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 in dicated, 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.
NOTICE■
Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus
dealer as soon as possible.

7154-3. Do-it-yourself maintenance
4
Maintenance and care ■ Front turn signal light (left side)
Move the fuse box.
Vehicles with LED headlights:
Unplug the connector while
depressing the lock release.
Turn the bulb base counterclock-
wise.
Remove the light bulb.STEP 1
STEP 2
STEP 3
STEP 4

5
When trouble arises
7775-2. 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 and perform the appropriate procedure:
■ The hybrid system will not start even though the correct starting
procedure is being followed. (  P. 1 7 7 )
One of the following may be the cause of the problem:
● The electronic key may not be functioning properly. (  P. 7 8 2 )
● There may be a malfunction in the immobilizer system. (  P. 1 2 4 )
● There may be a malfunction in the steering lock system.
● The hybrid system may be malfunc tioning due to an electrical
problem such as an open circ uit or a blown fuse. However,
depending on the type of malfunc tion, an interim measure is avail-
able to start the hybrid system. (  P. 7 7 8 )
■ The interior lights and headlights 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. 7 8 4 )
● The 12-volt battery terminal co nnections may be loose or cor-
roded.
■ 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 12-volt battery terminals may be discon-
nected.
● The 12-volt battery may be discharged. (  P. 7 8 4 )
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.

7845-2. Steps to take in an emergency
If the vehicle 12-volt battery is discharged The following procedures may be used to start the hybrid system if the vehi-
cle’s 12-volt battery is discharged.
You can also call your Lexus dealer or a qualified repair shop.
If you have a set of jumper (or booster) cables and a second vehicle
with a 12-volt battery, you can jump start your vehicle by following the
steps below.
Open the hood and remove the engine compartment covers.
(  P. 655)
Remove the fuse box cover and open the exclusive jump start-
ing terminal cover.
Connect the jumper cables according to the following procedure:
Connect a positive jumper cable clam p to the exclusive jump start-
ing terminal on your vehicle
Connect a positive jumper cable cl amp to the positive (+) battery
terminal on the second vehicle
Connect a negative cable clamp to the negative (-) battery terminal
on the second vehicle
Connect the clamp at the other end of the negative cable to a solid,
stationary, unpainted metallic point away from the exclusive jump
starting terminal and any moving part s, as shown in the illustration.STEP 1
STEP 2
STEP 3