Lexus RX - 2012 Fuse Box Diagram

Lexus RX - 2012 Fuse Box Diagram

60
1-2. Opening, closing and locking the doors
If the back door opener is inoperative
The back door can be opened from the inside.
Move the lever.
Vehicles with a power back door
Vehicles without a power back door
When reconnecting the battery or changing a fuse while the back door is open:
To enable the power back door to operate properly, initialize the system by com-
pletely closing the back door manually. If the battery is reconnected or a fuse is
changed while the back door is closed, initializing the system is not necessary.
Remove the cover.
STEP
1
STEP
2
435
3-7. Other interior features
3
Interior features
Routing accessory device cables
The power outlets can be used when
12 V
The “ENGINE START STOP” switch is in ACCESSORY or IGNITION ON mode.
120 VAC
The “ENGINE START STOP” switch is in IGNITION ON mode.
NOTICE
To avoid damaging the power outlets
Close the power outlet lid when the power outlet is not in use.
Foreign objects or liquids that enter the power outlet may cause a short circuit.
To prevent the fuse from being blown
12 V
:
Do not use an accessory that uses more than 12 V 10 A.
120 VAC
:
Do not use a 120 VAC appliance that requires more than 100 W.
If a 120 VAC appliance that consumes more than 100 W is used, the protection
circuit will cut the power supply.
To prevent battery discharge
Do not use the power outlets longer than necessary when the engine is not running.
Appliances that may not operate properly (120 VAC)
The following 120 VAC appliances may not operate properly even if their power
consumption is under 100 W:
Appliances with high initial peak wattage
Measuring devices that process precise data
Other appliances that require an extremely stable power supply
When the cover is slide open, accessory
device cables can be pulled through the
opening.
479
4-3. Do-it-yourself maintenance
4
Maintenance and care
Items
Parts and tools
Engine oil level
(
P. 487)
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel
• Funnel (used only for adding
engine oil)
Fuses
(
P. 519)
Fuse with same amperage rating as
original
Tire inflation pressure
(
P. 508)
• Tire pressure gauge
• Compressed air source
Headlight aim
(
P. 530)
• Phillips-head screwdriver
Radiator and condenser (
P. 493)
Washer fluid
(
P. 498)
• Water washer fluid containing anti-
freeze (for winter use)
• Funnel (used only for adding water
or washer fluid)
484
4-3. Do-it-yourself maintenance
Engine compartment
Engine oil filler cap
(
P. 487)
Engine oil level dipstick
(
P. 487)
Battery
(
P. 495)
Brake fluid reservoir
(
P. 493)
Fuse box
(
P. 519)
Engine coolant reservoir
(
P. 491)
Condenser
(
P. 493)
Radiator
(
P. 493)
Electric cooling fans
Washer fluid tank
(
P. 498)
519
4-3. Do-it-yourself maintenance
4
Maintenance and care
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.
Turn the “ENGINE START STOP” switch off.
Remove the engine compartment cover. (
P. 485)
Open the fuse box cover.
Engine compartment
Push the tab in and lift the lid off.
Driver's side instrument panel
Remove the lid.
After a system failure, see “Fuse layout and amperage ratings”
for details about which fuse to check. (
P. 522)
STEP
1
STEP
2
STEP
3
STEP
4
520
4-3. Do-it-yourself maintenance
Remove the fuse with the pull-
out tool.
Check if the fuse has blown.
Type A
Normal fuse
Blown fuse
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 B
Normal fuse
Blown fuse
Replace the blown fuse with a
new
fuse
of
an
appropriate
amperage rating. The amperage
rating can be found on the fuse
box lid.
STEP
5
STEP
6
521
4-3. Do-it-yourself maintenance
4
Maintenance and care
Type C
Normal fuse
Blown fuse
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 D
Normal fuse
Blown fuse
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 E
Normal fuse
Blown fuse
Replace the blown fuse with a
new
fuse
of
an
appropriate
amperage rating. The amperage
rating can be found on the fuse
box lid.
522
4-3. Do-it-yourself maintenance
Fuse layout and amperage ratings
Engine compartment
Fuse
Ampere
Circuit
1
RDI FAN NO. 1
80 A
Electric cooling fans
2
RR DEF
50 A
Rear window defogger
3
AIR SUS
50 A
4
HTR
50 A
Air conditioning system
5
SPARE
30 A
6
SPARE
40 A
7
ABS NO. 2
30 A
Anti-lock brake system
8
H-LP CLN
30 A
Headlight cleaner
9
PBD
30 A
Power back door system
10
ST
30 A
Starter system
523
4-3. Do-it-yourself maintenance
4
Maintenance and care
11
PD
50 A
Daytime running light system, A/F,
H-LP RH HI, H-LP LH LO, H-LP RH
LO, H-LP LH HI, HORN, S-HORN,
multiplex communication system,
multiport fuel injection system/
sequential multiport fuel injection sys-
tem
12
ABS NO. 1
50 A
Anti-lock brake system
13
EPS
60 A
Electric power steering system
14
ALT
140 A
FUEL OPN, DR LOCK, OBD, RR
FOG, S/ROOF, 4WD, INVERTER,
ECU IG1 NO. 1, ECU IG1 NO. 2,
PANEL, GAUGE NO. 1
15
AMP1
30 A
Audio system
16
EFI MAIN
30 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, EFI NO. 1, EFI NO. 2
17
AMP2
30 A
Audio system
18
IG2
30 A
Starter system, IGN, GAUGE NO. 2,
ECU IG2
19
IP JB
25 A
Power door lock system
20
STR LOCK
20 A
Starter system
21
RAD NO. 3
15 A
Meters and gauges lights, instrument
panel lights, navigation system, audio
system, rear seat entertainment sys-
tem
22
HAZ
15 A
Emergency flashers
Fuse
Ampere
Circuit
524
4-3. Do-it-yourself maintenance
23
ETCS
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
24
RAD NO. 1
10 A
Audio system
25
AM2
7.5 A
Starting system
26
ECU-B NO. 2
7.5 A
Air conditioning system, front passen-
ger occupant classification system,
starter system
27
MAYDAY/TEL
7.5 A
MAYDAY/TEL
28
IMMOBI
7.5 A
29
ALT-S
7.5 A
Charging system
30
IGN
10 A
Starter system, multiport fuel injection
system/sequential multiport fuel injec-
tion system
31
DOME
10 A
Vanity mirror lights, luggage compart-
ment lights, interior lights, personal
lights
32
ECU-B NO. 1
7.5 A
Interior lights, personal lights, tilt and
telescopic steering, multiplex commu-
nication system, meters and gauges,
power window, driving position mem-
ory system, power seats, power back
door, head-up display, starter system,
air conditioning system, power door
lock system
33
EFI NO. 1
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
34
WIP-S
7.5 A
Windshield wipers and washer
Fuse
Ampere
Circuit
525
4-3. Do-it-yourself maintenance
4
Maintenance and care
35
AFS
7.5 A
Adaptive front-lighting system
36
BK/UP LP
7.5 A
Back-up lights
37
HEATER NO. 2
7.5 A
Air conditioning system, AWD system
38
ECU IG1
10 A
Adaptive front-lighting system, head-
light cleaner, cooling fan, cruise con-
trol, vehicle stability control, vehicle
dynamics integrated management
39
EFI NO. 2
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
40
F/PUMP
15 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
41
DEICER
25 A
Windshield wipers and washer
42
STOP
7.5 A
Vehicle stability control, vehicle
dynamics integrated management,
high mounted stoplight
43
TOWING BATT
20 A
Trailer battery
44
TOWING
30 A
Trailer lights
45
FILTER
10 A
Condenser
46
IG1 MAIN
30 A
ECU IG1, BK/UP LP,
HEATER NO. 2, AFS
47
H-LP RH HI
15 A
Right-hand headlight (high beam)
48
H-LP LH HI
15 A
Left-hand headlight (high beam)
49
BIXENON
10 A
Discharge headlight
50
H-LP RH LO
15 A
Right-hand headlight (low beam)
51
H-LP LH LO
15 A
Left-hand headlight (low beam)
Fuse
Ampere
Circuit
526
4-3. Do-it-yourself maintenance
Driver’s side instrument panel
52
HORN
10 A
Horn
53
A/F
20 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
54
S-HORN
7.5 A
S-HORN
Fuse
Ampere
Circuit
1
P/POINT
15 A
Power outlet
2
ECU-ACC
10 A
Navigation system, outside rear view
mirror, multiplex communication sys-
tem, multi-information display, head-
up display
3
CIG
15 A
Power outlet
4
RADIO NO. 2
7.5 A
Audio system, power outlet
5
GAUGE NO. 1
10 A
Emergency flashers, navigation sys-
tem, head-up display
Fuse
Ampere
Circuit
527
4-3. Do-it-yourself maintenance
4
Maintenance and care
6
ECU-IG1 NO. 3
10 A
Outside rear view mirror, windshield
wipers and washer, seat heaters,
starter system, power outlet, moon
roof, Automatic High Beam
7
ECU-IG1 NO. 1
10 A
Multiplex communication system,
electric power steering system, shift
lock control system, tilt and telescopic
steering, starter system, automatic
transmission system, power back
door, tire pressure warning system
8
S/ROOF
30 A
Moon roof
9
FUEL OPN
7.5 A
Fuel filler door opener
10
PSB
30 A
Pre-collision seat belt
11
TI & TE
30 A
Tilt and telescopic steering system
12
DR LOCK
10 A
Power door lock system
13
FR FOG
15 A
Front fog lights
14
P-SEAT LH
30 A
Power seat (left-side)
15
4WD
7.5 A
AWD system
16
INVERTER
20 A
17
RR FOG
7.5 A
18
D/L ALT B
25 A
Multiplex communication system
19
HEATER
10 A
Air conditioning system
20
ECU-IG1 NO. 2
10 A
Air conditioning system, multiport fuel
injection system/sequential multiport
fuel injection system, SRS airbag sys-
tem, multi-information display
Fuse
Ampere
Circuit
528
4-3. Do-it-yourself maintenance
21
PANEL
10 A
Switch illumination, navigation system,
headlight cleaner, windshield wiper
de-icer, seat heater, power back door,
audio system, multi-information dis-
play, air conditioning system
22
TAIL
10 A
Parking lights, side marker lights, tail
lights, license plate lights, front fog
lights, towing converter
23
AIR SUS
20 A
24
P-SEAT RH
30 A
Power seat (right-side)
25
OBD
7.5 A
On-Board diagnosis
26
FR DOOR
25 A
Front power window (right-side)
27
RR DOOR
25 A
Rear power window (right-side)
28
FL DOOR
25 A
Front power window (left-side)
29
RL DOOR
25 A
Rear power window (left-side)
30
FR WASH
25 A
Windshield wipers and washer
31
RR WIP
15 A
Windshield wipers and washer
32
RR WASH
20 A
Windshield wipers and washer
33
FR WIP
30 A
Windshield wipers and washer
34
ECU IG2
10 A
Starter system, intuitive parking assist,
AWD system
35
GAUGE NO. 2
7.5 A
Starter system
36
RH S-HTR
15 A
Seat heater (right-side)
37
LH S-HTR
15 A
Seat heater (left-side)
Fuse
Ampere
Circuit
529
4-3. Do-it-yourself maintenance
4
Maintenance and care
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. 532)
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.
Failing to do so may cause damage, and possibly a fire or injury.
Never use a fuse of a higher amperage rating than 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.
This can cause extensive damage or even fire.
Do not modify fuse or fuse boxes.
NOTICE
Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus
dealer.
5
When trouble arises
601
5-2. Steps to take in an emergency
If the engine will not start
If the engine will not start even though correct starting procedures are
being followed (
P. 159), consider each of the following points.
The engine will not start, even though the starter motor operates
normally.
One of the following may be the cause of the problem:
There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
The engine may be flooded.
Try to restart the engine again following correct starting proce-
dures. (
P. 159)
There may be a malfunction in the engine immobilizer system.
(
P. 108)
The starter motor turns over slowly, the interior lights and head-
lights are dim, or the horn does not sound or sounds at a low vol-
ume.
One of the following may be the cause of the problem:
The battery may be discharged. (
P. 608)
The battery terminal connections may be loose or corroded.
The starter motor does not turn over.
The engine starting system may be malfunctioning due to an electri-
cal problem such as an open circuit or a blown fuse. However, an
interim measure is available to start the engine. (
P. 602)
654
6-3. Initialization
Items to initialize
Item
When to initialize
Reference
Power back door
(if equipped)
• After reconnecting or changing the
battery
• After changing a fuse
P. 55
Maintenance data
(U.S.A. only)
After the maintenance is performed
P. 471
Tire pressure warning
system
• When changing tire pressure (such
as when changing traveling speed,
load weight, etc.)
• When changing the tire size
P. 500
The following items must be initialized for normal system operation in cases
such as after the battery is reconnected, or maintenance is performed on
the vehicle.
75
1-3. Opening, closing and locking the doors
1
Before driving
If the back door opener is inoperative
The back door can be opened from the inside.
Move the lever.
Vehicles with a power back door
Vehicles without a power back door
When reconnecting the 12-volt battery or changing a fuse while the back door is
open:
To enable the power back door to operate properly, initialize the system by com-
pletely closing the back door manually. If the 12-volt battery is reconnected or a
fuse is changed while the back door is closed, initializing the system is not neces-
sary.
Remove the cover.
STEP
1
STEP
2
464
3-7. Other interior features
The power outlets can be used when
12 V
The “POWER” switch is in ACCESSORY or ON mode.
120 VAC
The “POWER” switch is in ON mode.
NOTICE
To avoid damaging the power outlets
Close the power outlet lid when the power outlet is not in use.
Foreign objects or liquids that enter the power outlet may cause a short circuit.
To prevent the fuse from being blown
Close the power outlet lid when the power outlet is not in use.
Foreign objects or liquids that enter the power outlet may cause a short circuit.
12 V
:
Do not use an accessory that uses more than 12 V 10 A.
120 VAC
:
Do not use a 120 VAC appliance that requires more than 100 W.
If a 120 VAC appliance that consumes more than 100 W is used, the protection cir-
cuit will cut the power supply.
To prevent 12-volt battery discharge
Do not use the power outlets longer than necessary when the hybrid system is off.
Appliances that may not operate properly (120 VAC)
The following 120 VAC appliances may not operate properly even if their power
consumption is under 100 W:
Appliances with high initial peak wattage
Measuring devices that process precise data
Other appliances that require an extremely stable power supply
507
4-3. Do-it-yourself maintenance
4
Maintenance and care
Items
Parts and tools
Engine oil level
(
P. 515)
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel
• Funnel (used only for adding
engine oil)
Fuses
(
P. 552)
Fuse with same amperage rating as
original
Tire inflation pressure
(
P. 541)
• Tire pressure gauge
• Compressed air source
Headlight aim
(
P. 568)
• Phillips-head screwdriver
Radiator and condenser
(
P. 521)
Washer fluid
(
P. 523)
• Water or washer fluid containing
antifreeze (for winter use)
• Funnel (used only for adding water
or washer fluid)
512
4-3. Do-it-yourself maintenance
Engine compartment
Brake fluid reservoir
(
P. 522)
Engine oil filler cap
(
P. 515)
Engine oil level dipstick
(
P. 515)
Power
control
unit
coolant
reservoir
(
P. 519)
Fuse boxes
(
P. 552)
Engine coolant reservoir
(
P. 519)
Radiator
(
P. 521)
Condenser
(
P. 521)
Electric cooling fans
Power
control
unit
coolant
radiator
(
P. 521)
Washer fluid tank
(
P. 523)
552
4-3. Do-it-yourself maintenance
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.
Turn the “POWER” switch off.
Remove the engine compartment cover. (
P. 513)
Open the fuse box cover.
Engine compartment (type A fuse box)
Push the tab in and lift the lid off.
Engine compartment (type B fuse box)
Push the tab in and lift the lid off.
STEP
1
STEP
2
STEP
3
553
4-3. Do-it-yourself maintenance
4
Maintenance and care
Engine compartment (type C fuse box)
Push the tab in and lift the lid off.
Driver's side instrument panel
Remove the lid.
Luggage compartment (type A fuse box)
554
4-3. Do-it-yourself maintenance
Luggage compartment (type B fuse box)
Remove the terminal cover.
After a system failure, see “Fuse layout and amperage ratings”
for details about which fuse to check. (
P. 557)
Remove the fuse with the pull-
out tool.
Check if the fuse has blown.
Type A
Normal fuse
Blown fuse
Replace the blown fuse with a
new
fuse
of
an
appropriate
amperage rating. The amperage
rating can be found on the fuse
box lid.
STEP
4
STEP
5
STEP
6
555
4-3. Do-it-yourself maintenance
4
Maintenance and care
Type B
Normal fuse
Blown fuse
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
Normal fuse
Blown fuse
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 D
Normal fuse
Blown fuse
Replace the blown fuse with a
new
fuse
of
an
appropriate
amperage rating. The amperage
rating can be found on the fuse
box lid.
556
4-3. Do-it-yourself maintenance
Type E
Normal fuse
Blown fuse
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 F
Normal fuse
Blown fuse
Contact your Lexus dealer.
557
4-3. Do-it-yourself maintenance
4
Maintenance and care
Fuse layout and amperage ratings
Engine compartment (type A fuse box)
Fuse
Ampere
Circuit
1
PCU
15 A
Hybrid system
2
IGCT NO. 2
10 A
Hybrid system
3
IGCT NO. 3
10 A
Hybrid system
4
INV W/P
10 A
Hybrid system
558
4-3. Do-it-yourself maintenance
Engine compartment (type B fuse box)
Fuse
Ampere
Circuit
1
SPARE
120 A
2
RR DEF
50 A
Rear window defogger
3
AIR SUS
50 A
Electronically modulated air suspen-
sion system
4
HTR
50 A
Air conditioning system
5
ECB NO. 1
50 A
Brake system, vehicle stability control,
vehicle dynamics integrated manage-
ment, meters and gauges
6
RDI FAN NO. 1
40 A
Electric cooling fans
7
RDI FAN NO. 2
40 A
Electric cooling fans
8
H-LP CLN
30 A
Headlight cleaner
9
PBD
30 A
Power back door system
10
HV R/B NO. 1
30 A
PCU, IGCT NO. 2, IGCT NO. 3,
INV W/P
559
4-3. Do-it-yourself maintenance
4
Maintenance and care
11
PD
50 A
Daytime running light system, A/F,
H-LP RH HI, H-LP LH LO, H-LP RH
LO, H-LP LH HI, HORN, S-HORN,
multiplex communication system,
multiport fuel injection system/
sequential multiport fuel injection sys-
tem
12
ECB NO. 2
50 A
Brake system
13
HV R/B NO. 2
80 A
ECB MAIN 1, ECB MAIN 2,
A/C W/P, BATT FAN, OIL PMP
14
DCDC
150 A
FUEL OPN, DR LOCK, OBD, RR
FOG, S/ROOF, INVERTER, ECU-
IG1 NO. 1, ECU-IG1 NO. 2, PANEL,
GAUGE NO. 1
15
AMP1
30 A
Audio system
16
EFI MAIN
30 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, EFI NO. 2
17
AMP2
30 A
Audio system
18
IG2 MAIN
30 A
Starter system, IGN, GAUGE NO. 2,
ECU IG2
19
IP JB
25 A
Power door lock system
20
STR LOCK
20 A
Starter system
21
RAD NO. 3
15 A
Meters and gauges, instrument panel
lights, navigation system, audio system
22
HAZ
15 A
Emergency flashers
23
ETCS
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
Fuse
Ampere
Circuit
560
4-3. Do-it-yourself maintenance
24
RAD NO. 1
10 A
Audio system
25
AM2
7.5 A
Starter system
26
ECU-B NO. 2
7.5 A
Air conditioning system, front passen-
ger occupant classification system,
starter system, electric power steering
system
27
MAYDAY/TEL
7.5 A
MAYDAY/TEL
28
IMMOBI
7.5 A
29
ECB MAIN
NO. 3
15 A
Brake system
30
IGN
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, brake system, SRS airbag system
31
DOME
10 A
Vanity mirror lights, luggage compart-
ment lights, interior lights, personal
lights
32
ECU-B NO. 1
10 A
Interior lights, personal lights, tilt and
telescopic steering, multiplex commu-
nication system, meters and gauges,
power windows, driving position
memory system, power seats, power
back door, head-up display, starter
system, air conditioning system,
power door lock system
33
EFI NO. 1
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
34
WIP-S
7.5 A
Windshield wipers and washer
35
AFS
7.5 A
Adaptive front-lighting system
Fuse
Ampere
Circuit
561
4-3. Do-it-yourself maintenance
4
Maintenance and care
36
BK/UP LP
7.5 A
Back-up lights
37
HEATER NO. 2
7.5 A
Air conditioning system, AWD system
38
ECU IG1
10 A
Adaptive front-lighting system,
headlight cleaner, cooling fan, cruise
control, electronically modulated air
suspension system, vehicle stability
control, vehicle dynamics integrated
management, brake system
39
EFI NO. 2
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
40
F/PMP
15 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
41
DEICER
25 A
Windshield wipers and washer
42
STOP
7.5 A
Vehicle stability control, vehicle
dynamics integrated management,
high mounted stoplight
43
TOWING BATT
20 A
Trailer battery
44
TOWING
30 A
Trailer lights
45
FILTER
10 A
Condenser
46
IG1 MAIN
30 A
ECU IG1, BK/UP LP,
HEATER NO. 2, AFS
47
H-LP RH HI
15 A
Right-hand headlight (high beam)
48
H-LP LH HI
15 A
Left-hand headlight (high beam)
49
BIXENON
10 A
Discharge headlight
50
H-LP RH LO
15 A
Right-hand headlight (low beam)
51
H-LP LH LO
15 A
Left-hand headlight (low beam)
Fuse
Ampere
Circuit
562
4-3. Do-it-yourself maintenance
Engine compartment (type C fuse box)
52
HORN
10 A
Horn
53
A/F
20 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
54
S-HORN
7.5 A
S-HORN
Fuse
Ampere
Circuit
1
ECB MAIN NO. 1
10 A
Brake system
2
ECB 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 system
Fuse
Ampere
Circuit
563
4-3. Do-it-yourself maintenance
4
Maintenance and care
Driver’s side instrument panel
Fuse
Ampere
Circuit
1
P/POINT
15 A
Power outlet
2
ECU-ACC
10 A
Navigation system, outside rear view
mirror, multiplex communication sys-
tem, multi-information display, head-
up display
3
CIG
15 A
Power outlet
4
RADIO NO. 2
7.5 A
Audio system, power outlet
5
GAUGE NO. 1
10 A
Emergency flashers, navigation sys-
tem, head-up display
6
ECU-IG1 NO. 3
10 A
Outside rear view mirror, windshield
wipers and washer, seat heaters,
starter system, power outlet, moon
roof
564
4-3. Do-it-yourself maintenance
7
ECU-IG1 NO. 1
10 A
Multiplex communication system,
electric power steering system, shift
lock control system, tilt and telescopic
steering, starter system, hybrid trans-
mission system, power back door,
hybrid system, tire pressure warning
system
8
S/ROOF
30 A
Moon roof
9
FUEL OPN
7.5 A
Fuel filler door opener
10
PSB
30 A
Pre-collision seat belt
11
TI & TE
30 A
Tilt and telescopic steering system
12
DR LOCK
10 A
Power door lock system
13
FR FOG
15 A
14
P-SEAT LH
30 A
Power seat (left-side)
15
INVERTER
20 A
16
RR FOG
7.5 A
17
D/L ALT B
25 A
Multiplex communication system
18
HEATER
10 A
Air conditioning system
19
ECU-IG1 NO. 2
10 A
Air conditioning system, multiport fuel
injection system/sequential multiport
fuel injection system, SRS airbag sys-
tem, multi-information display, capaci-
tor
20
PANEL
10 A
Switch illumination, navigation system,
height control system, headlight
cleaner, windshield wiper de-icer, seat
heater, power back door, audio sys-
tem, multi-information display, air con-
ditioning system
Fuse
Ampere
Circuit
565
4-3. Do-it-yourself maintenance
4
Maintenance and care
21
TAIL
10 A
Position lights, tail lights, license plate
lights, towing converter
22
AIR SUS
20 A
Electronically modulated air suspen-
sion system
23
P-SEAT RH
30 A
Power seat (right-side)
24
OBD
7.5 A
On-board diagnosis
25
FR DOOR
25 A
Front power window (right-side)
26
RR DOOR
25 A
Rear power window (right-side)
27
FL DOOR
25 A
Front power window (left-side)
28
RL DOOR
25 A
Rear power window (left-side)
29
FR WASH
25 A
Windshield wipers and washer
30
RR WIP
15 A
Windshield wipers and washer
31
RR WASH
20 A
Windshield wipers and washer
32
FR WIP
30 A
Windshield wipers and washer
33
ECU IG2
10 A
Starter system, intuitive parking assist,
AWD system
34
GAUGE NO. 2
7.5 A
Starter system
35
RH S-HTR
15 A
Seat heater (right-side)
36
LH S-HTR
15 A
Seat heater (left-side)
Fuse
Ampere
Circuit
566
4-3. Do-it-yourself maintenance
Luggage compartment (type A fuse box)
Luggage compartment (type B fuse box)
Fuse
Ampere
Circuit
1
DCDC-S
7.5 A
Hybrid system
2
CAPACITOR
10 A
Hybrid system
Fuse
Ampere
Circuit
1
MAIN
180 A
All electrical components
2
RR-B
50 A
CAPACITOR, DCDC-S
3
EPS
80 A
Electric power steering system
567
4-3. Do-it-yourself maintenance
4
Maintenance and care
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. 571)
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, 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.
This can cause extensive damage or even fire.
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.
574
4-3. Do-it-yourself maintenance
Unplug
the
connector
while
depressing the lock release.
Headlight high beams and daytime running lights (halogen head-
lights)
Before replacing the bulbs:
Left side
Move the fuse box.
Right side
Move the washer fluid filler open-
ing.
STEP
2
STEP
1
577
4-3. Do-it-yourself maintenance
4
Maintenance and care
Parking lights (vehicles without LED headlights)
Before replacing the bulbs:
Left side
Move the fuse box.
Right side
Move the washer fluid filler open-
ing.
Turn the bulb base counterclock-
wise.
STEP
1
STEP
2
578
4-3. Do-it-yourself maintenance
Remove the light bulb.
Parking lights (vehicles with LED headlights)
Before replacing the bulbs:
Left side
Move the fuse box.
Right side
Move the washer fluid filler open-
ing.
STEP
3
STEP
1
579
4-3. Do-it-yourself maintenance
4
Maintenance and care
Turn the bulb base counterclock-
wise.
Remove the light bulb.
Front turn signal lights
Before replacing the bulbs:
Left side
Move the fuse box.
STEP
2
STEP
3
STEP
1
581
4-3. Do-it-yourself maintenance
4
Maintenance and care
Front side marker lights (vehicles without LED headlights)
Before replacing the bulbs:
Left side
Move the fuse box.
Right side
Move the washer fluid filler open-
ing.
Turn the bulb base counterclock-
wise.
STEP
1
STEP
2
582
4-3. Do-it-yourself maintenance
Remove the light bulb.
Front side marker lights (vehicles with LED headlights)
Before replacing the bulbs:
Left side
Move the fuse box.
Right side
Move the washer fluid filler open-
ing.
STEP
3
STEP
1
5
When trouble arises
643
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 and perform the appropriate procedure:
The hybrid system will not start even though the correct starting
procedure is being followed. (
P. 176)
One of the following may be the cause of the problem:
The electronic key may not be functioning properly. (
P. 648)
There may be a malfunction in the immobilizer system. (
P. 124)
There may be a malfunction in the steering lock system.
The hybrid system may be malfunctioning due to an electrical
problem such as an open circuit or a blown fuse. However,
depending on the type of malfunction, an interim measure is avail-
able to start the hybrid system. (
P. 644)
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. 650)
The 12-volt battery terminal connections 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. 650)
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.
650
5-2. 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. 513)
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 clamp to the exclusive jump start-
ing terminal on your vehicle
Connect a positive jumper cable clamp to the positive (+) battery
terminal on the second vehicle
Connect a negative cable clamp to the negative (-) battery terminal
on the second vehicle
STEP
1
STEP
2
STEP
3
702
6-3. Initialization
Items to initialize
Item
When to initialize
Reference
Power back door
(if equipped)
• After reconnecting or changing the
12-volt battery
• After changing a fuse
P. 70
Maintenance data
(U.S.A. only)
After the maintenance is performed
P. 501
Tire pressure warning
system
• When changing tire pressure (such
as when changing traveling speed,
load weight, etc.)
• When changing the tire size
P. 533
The following items must be initialized for normal system operation in cases
such as after the 12-volt battery is reconnected, or maintenance is per-
formed on the vehicle.