Lexus RX - 2014 Fuse Box Diagram

Lexus RX - 2014 Fuse Box Diagram

61
1-2. 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.
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.
Move the lever.
STEP
1
STEP
2
618
3-7. Other interior features
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 battery discharge
Do not use the power outlets longer than necessary when the engine 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
665
4-3. Do-it-yourself maintenance
4
Maintenance and care
Items
Parts and tools
Engine oil level
(
P. 674)
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel
• Funnel (used only for adding
engine oil)
Fuses
(
P. 703)
Fuse with same amperage rating as
original
Tire inflation pressure
(
P. 693)
• Tire pressure gauge
• Compressed air source
Headlight aim
(
P. 716)
• Phillips-head screwdriver
Radiator and condenser
(
P. 678)
Washer fluid
(
P. 683)
• Water or washer fluid containing
antifreeze (for winter use)
• Funnel (used only for adding water
or washer fluid)
670
4-3. Do-it-yourself maintenance
Engine compartment
Engine oil filler cap
(
P. 675)
Engine oil level dipstick
(
P. 674)
Battery
(
P. 681)
Brake fluid reservoir
(
P. 679)
Fuse box
(
P. 703)
Engine coolant reservoir
(
P. 677)
Condenser
(
P. 678)
Radiator
(
P. 678)
Electric cooling fans
Washer fluid tank
(
P. 683)
703
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. 671)
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. 706)
STEP
1
STEP
2
STEP
3
STEP
4
704
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
705
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.
706
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
HEATER
50 A
Air conditioning system
5
SPARE
30 A
6
SPARE
40 A
7
ABS NO. 2
30 A
Vehicle stability control
8
H-LP CLN
30 A
Headlight cleaner
9
PBD
30 A
Power back door
10
ST
30 A
Starter system
11
PD
50 A
A/F, H-LP RH HI, H-LP LH LO, H-LP
RH LO, H-LP LH HI, HORN, S-
HORN
12
ABS NO. 1
50 A
Vehicle stability control
707
4-3. Do-it-yourself maintenance
4
Maintenance and care
13
EPS
60 A
Electric power steering system
14
ALT
140 A
IG1 MAIN, TOWING BATT,
DEICER, TOWING, STOP, RDI FAN
NO. 1, FILTER, RR DEF, AIR SUS,
HEATER, ABS NO. 2, H-LP CLN,
PBD, ECU-IG1 NO. 1, ECU-IG1 NO.
3, GAUGE NO. 1, ECU-IG1 NO. 2,
EPS, FR WIP, RR WIP, FR WASH, RR
WASH, RH S-HTR, LH S-HTR, TAIL,
PANEL, D/L ALT B, FR FOG, FR
DOOR, FL DOOR, RR DOOR, RL
DOOR, PSB, P-SEAT LH, P-SEAT
RH, TI&TE, FUEL OPN, DR LOCK,
OBD, RR FOG, S/ROOF, 4WD,
INVERTER, ECU-ACC, P/POINT,
CIG, RADIO NO. 2
15
AMP1
30 A
Audio system
16
EFI MAIN
30 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, electronic controlled transmis-
sion, EFI NO. 1, EFI NO. 2, F/PMP
17
AMP2
30 A
Audio system
18
IG2 MAIN
30 A
IGN, GAUGE NO. 2, ECU IG 2
19
IP J/B
25 A
Power door lock system
20
STR LOCK
20 A
Starter system
21
RAD NO. 3
15 A
Meters and gauges, navigation sys-
tem, audio system
22
HAZ
15 A
Emergency flashers
Fuse
Ampere
Circuit
708
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, navigation 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,
audio system, vehicle stability control
system, power windows
27
MAYDAY/TEL
7.5 A
MAYDAY/TEL
28
IMMOBI
7.5 A
IMMOBI
29
ALT-S
7.5 A
Charging system
30
DRL
7.5 A
Daytime running light system
31
IGN
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
32
DOME
10 A
Vanity mirror lights, luggage compart-
ment lights, interior lights, personal
lights, door courtesy lights, footwell
lights, scuff lights
33
ECU-B NO. 1
10 A
Tilt and telescopic steering, multiplex
communication system, meters and
gauges, driving position memory,
power seats, power back door, head-
up display, starter system, outside rear
view mirror, steering sensor, garage
door opener
Fuse
Ampere
Circuit
709
4-3. Do-it-yourself maintenance
4
Maintenance and care
34
EFI NO. 1
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, electronic controlled transmis-
sion
35
WIP-S
7.5 A
Cruise control
36
ECU-IG1 NO. 4
10 A
Air conditioning system, rear window
defogger, vehicle stability control sys-
tem, electric cooling fans
37
BK/UP LP
7.5 A
Back-up lights
38
ECU-IG1 NO. 5
15 A
Air conditioning system
39
ECU-IG1 NO. 6
10 A
Head light cleaner, cruise control,
vehicle stability control, air condition-
ing system, Blind Spot Monitor
40
EFI NO. 2
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
41
F/PMP
15 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
42
DEICER
25 A
Windshield wipers and washer
43
STOP
7.5 A
Vehicle stability control, vehicle
dynamics integrated management,
stop lights, electronic controlled
transmission, multiport fuel injection
system/sequential multiport fuel injec-
tion system, shift lock control system,
starter system
44
TOWING BATT
20 A
Trailer battery
45
TOWING
30 A
Trailer lights
Fuse
Ampere
Circuit
710
4-3. Do-it-yourself maintenance
46
FILTER
10 A
47
IG1 MAIN
30 A
ECU-IG1 NO. 6, BK/UP LP, ECU-
IG1 NO. 5, ECU-IG1 NO. 4
48
H-LP RH HI
15 A
Right-hand headlight (high beam)
49
H-LP LH HI
15 A
Left-hand headlight (high beam)
50
BIXENON
10 A
51
H-LP RH LO
15 A
Right-hand headlight (low beam)
52
H-LP LH LO
15 A
Left-hand headlight (low beam)
53
HORN
10 A
Horn
54
A/F
20 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
55
S-HORN
7.5 A
S-HORN
Fuse
Ampere
Circuit
711
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, air conditioning
system, audio system, multiplex com-
munication system, multi-information
display, head-up display
3
CIG
15 A
Power outlet
4
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, charging 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
712
4-3. Do-it-yourself maintenance
7
ECU-IG1 NO. 1
10 A
Multiplex communication system,
steering sensor, shift lock control sys-
tem, tilt and telescopic steering, auto-
matic transmission system, power
back door, pre-collision system, vehi-
cle stability control system, tire pres-
sure 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
13
FR FOG
7.5 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
Power outlet
17
RR FOG
7.5 A
18
D/L ALT B
25 A
Multiplex communication system,
power door lock system, power back
door
19
EPS
10 A
Electric power steering system
20
ECU-IG1 NO. 2
10 A
Intuitive parking assist, AWD system,
pre-collision seat belt
Fuse
Ampere
Circuit
713
4-3. Do-it-yourself maintenance
4
Maintenance and care
21
PANEL
10 A
Switch illumination, navigation system,
automatic transmission system, audio
system, multi-information display, air
conditioning system, multiplex com-
munication system
22
TAIL
10 A
Parking lights, front 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), out-
side rear view mirror
27
RR DOOR
25 A
Rear power window (right-side)
28
FL DOOR
25 A
Front power window (left-side), out-
side rear view mirror
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
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, front passenger occupant classi-
fication system, SRS airbag system,
stop lights, electronic controlled
transmission, steering lock system
Fuse
Ampere
Circuit
714
4-3. Do-it-yourself maintenance
35
GAUGE NO. 2
7.5 A
Gauge and meters
36
RH S-HTR
15 A
Seat heater (right-side)
37
LH S-HTR
15 A
Seat heater (left-side)
Fuse
Ampere
Circuit
715
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. 719)
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
789
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. 165), 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. 165)
There may be a malfunction in the engine immobilizer system.
(
P. 110)
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. 796)
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. 790)
848
6-3. Initialization
Items to initialize
Item
When to initialize
Reference
Power back door
• After reconnecting or changing the
battery
• After changing a fuse
P. 56
Maintenance data
(U.S.A. only)
After the maintenance is performed
P. 659
Tire pressure warning
system
• When rotating the tires
• When changing tire pressure (such
as when changing traveling speed,
load weight, etc.)
• When changing the tire size
P. 685
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.
79
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.
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.
Move the lever.
STEP
1
STEP
2
603
3-7. Other interior features
3
Interior features
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
649
4-3. Do-it-yourself maintenance
4
Maintenance and care
Items
Parts and tools
Engine oil level
(
P. 656)
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel
• Funnel (used only for adding
engine oil)
Fuses
(
P. 689)
Fuse with same amperage rating as
original
Tire inflation pressure
(
P. 679)
• Tire pressure gauge
• Compressed air source
Headlight aim
(
P. 705)
• Phillips-head screwdriver
Radiator and condenser
(
P. 661)
Washer fluid
(
P. 663)
• Water or washer fluid containing
antifreeze (for winter use)
• Funnel (used only for adding water
or washer fluid)
654
4-3. Do-it-yourself maintenance
Engine compartment
Brake fluid reservoir
(
P. 662)
Engine oil filler cap
(
P. 657)
Engine oil level dipstick
(
P. 656)
Power
control
unit
coolant
reservoir
(
P. 659)
Fuse boxes
(
P. 689)
Engine coolant reservoir
(
P. 659)
Condenser
(
P. 661)
Radiator
(
P. 661)
Electric cooling fans
Power
control
unit
coolant
radiator
(
P. 661)
Washer fluid tank
(
P. 663)
689
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 “POWER” switch off.
Remove the engine compartment cover. (
P. 655)
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
690
4-3. Do-it-yourself maintenance
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)
691
4-3. Do-it-yourself maintenance
4
Maintenance and care
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. 694)
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
692
4-3. Do-it-yourself maintenance
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.
693
4-3. Do-it-yourself maintenance
4
Maintenance and care
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.
694
4-3. Do-it-yourself maintenance
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
695
4-3. Do-it-yourself maintenance
4
Maintenance and care
Engine compartment (type B fuse box)
Fuse
Ampere
Circuit
1
RR DEF
50 A
Rear window defogger
2
AIR SUS
50 A
3
HEATER
50 A
Air conditioning system
4
ABS NO. 1
50 A
Electronically controlled brake system
5
RDI FAN NO. 1
40 A
Electric cooling fans
6
RDI FAN NO. 2
40 A
Electric cooling fans
7
H-LP CLN
30 A
Headlight cleaner
8
PBD
30 A
Power back door
9
HV R/B NO. 1
30 A
PCU, IGCT NO. 2, IGCT NO. 3,
INV W/P
10
PD
50 A
A/F, H-LP RH HI, H-LP LH LO, H-LP
RH LO, H-LP LH HI, HORN, S-
HORN
11
ABS NO. 2
50 A
Electronically controlled brake system
12
HV R/B NO. 2
80 A
ABS MAIN NO. 1, ABS MAIN NO.
2, A/C W/P, BATT FAN, OIL PMP
696
4-3. Do-it-yourself maintenance
13
DCDC
150 A
IG1 MAIN, TOWING BATT,
DEICER, TOWING, STOP, RDI FAN
NO. 1, ABS NO. 1, RR DEF, AIR SUS,
HEATER, RDI FAN NO. 2, H-LP
CLN, PBD, ECU-IG1 NO. 1, ECU-
IG1 NO. 3, GAUGE NO. 1, ECU-IG1
NO. 2, EPS, FR WIP, RR WIP, FR
WASH, RR WASH, RH S-HTR, LH S-
HTR, TAIL, PANEL, D/L ALT B, FR
FOG, FR DOOR, FL DOOR, RR
DOOR, RL DOOR, PSB, P-SEAT LH,
P-SEAT RH, TI&TE, FUEL OPN, DR
LOCK, OBD, RR FOG, S/ROOF,
4WD, INVERTER, ECU-ACC, P/
POINT, CIG, RADIO NO. 2
14
AMP1
30 A
Audio system
15
EFI MAIN
30 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, EFI NO. 1, EFI NO. 2, F/PMP
16
AMP2
30 A
Audio system
17
IG2 MAIN
30 A
IGN, GAUGE NO. 2, ECU IG2
18
IP J/B
25 A
Power door lock system
19
STR LOCK
20 A
Starter system
20
RAD NO. 3
15 A
Meters and gauges, navigation sys-
tem, audio system
21
HAZ
15 A
Emergency flashers
22
ETCS
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
23
RAD NO. 1
10 A
Audio system, navigation system
Fuse
Ampere
Circuit
697
4-3. Do-it-yourself maintenance
4
Maintenance and care
24
AM2
7.5 A
Starter system
25
ECU-B NO. 2
7.5 A
Air conditioning system, front passen-
ger occupant classification system,
audio system, vehicle dynamics inte-
grated management, power windows,
electric power steering system
26
MAYDAY/TEL
7.5 A
MAYDAY/TEL
27
IMMOBI
7.5 A
IMMOBI
28
ABS MAIN
NO. 3
15 A
Brake system
29
DRL
7.5 A
Daytime running light system
30
IGN
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
31
DOME
10 A
Vanity mirror lights, luggage compart-
ment lights, interior lights, personal
lights, door courtesy lights, footwell
lights, scuff lights
32
ECU-B NO. 1
10 A
Tilt and telescopic steering, multiplex
communication system, meters and
gauges, driving position memory,
power seats, power back door, head-
up display, starter system, outside rear
view mirror, steering sensor, garage
door opener
33
EFI NO. 1
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
34
WIP-S
7.5 A
Cruise control
Fuse
Ampere
Circuit
698
4-3. Do-it-yourself maintenance
35
ECU-IG1 NO. 4
10 A
Air conditioning system, rear window
defogger, electronically controlled
brake system, electric cooling fans
36
BK/UP LP
7.5 A
Back-up lights
37
ECU-IG1 NO. 5
15 A
Air conditioning system
38
ECU-IG1 NO. 6
10 A
Head light cleaner, cruise control, air
conditioning system, Blind Spot Moni-
tor
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 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 control
43
TOWING BATT
20 A
44
TOWING
30 A
Trailer lights
45
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
699
4-3. Do-it-yourself maintenance
4
Maintenance and care
Engine compartment (type C fuse box)
49
BIXENON
10 A
50
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
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
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 system
Fuse
Ampere
Circuit
700
4-3. Do-it-yourself maintenance
Driver’s side instrument panel
Fuse
Ampere
Circuit
1
P/POINT
15 A
Power outlet
2
ECU-ACC
10 A
Navigation system, air conditioning
system, audio system, multiplex com-
munication system, multi-information
display, head-up display
3
CIG
15 A
Power outlet
4
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
701
4-3. 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
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
13
FR FOG
7.5 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
Power outlet
17
RR FOG
7.5 A
18
D/L ALT B
25 A
Multiplex communication system,
power door lock system, power back
door
19
EPS
10 A
Electric power steering system
20
ECU-IG1 NO. 2
10 A
Intuitive parking assist, pre-collision
seat belt, capacitor
21
PANEL
10 A
Switch illumination, navigation system,
hybrid transmission system, audio sys-
tem, multi-information display, air con-
ditioning system, multiplex
communication system
Fuse
Ampere
Circuit
702
4-3. Do-it-yourself maintenance
22
TAIL
10 A
Parking lights, front 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), out-
side rear view mirror
27
RR DOOR
25 A
Rear power window (right-side)
28
FL DOOR
25 A
Front power window (left-side), out-
side rear view mirror
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
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 system
35
GAUGE NO. 2
7.5 A
Gauge and meters
36
RH S-HTR
15 A
Seat heater (right-side)
37
LH S-HTR
15 A
Seat heater (left-side)
Fuse
Ampere
Circuit
703
4-3. Do-it-yourself maintenance
4
Maintenance and care
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
Capacitor
Fuse
Ampere
Circuit
1
MAIN
180 A
All electrical components
2
RR-B
50 A
CAPACITOR, DCDC-S
3
EPS
80 A
Hybrid system
704
4-3. Do-it-yourself maintenance
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. 708)
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 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.
NOTICE
Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus
dealer as soon as possible.
715
4-3. 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
777
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. 177)
One of the following may be the cause of the problem:
The electronic key may not be functioning properly. (
P. 782)
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. 778)
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. 784)
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. 784)
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.
784
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. 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 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
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 parts, as shown in the illustration.
STEP
1
STEP
2
STEP
3
837
6
Vehicle specifications
6-3. Initialization
Items to initialize
Item
When to initialize
Reference
Power back door
• After reconnecting or changing the
12-volt battery
• After changing a fuse
P. 75
Maintenance data
(U.S.A. only)
After the maintenance is performed
P. 643
Tire pressure warning
system
• When rotating the tires
• When changing tire pressure (such
as when changing traveling speed,
load weight, etc.)
• When changing the tire size
P. 671
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.