Lexus LS - 2008 Fuse Box Diagram

Lexus LS - 2008 Fuse Box Diagram

486
3-8. Other interior features
NOTICE
To avoid damaging the power outlet
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.
115 VAC
Do not use a 115 VAC appliance that requires more than 100 W.
If a 115 VAC appliance that consumes more than 100 W is used, the protection
circuit will cut the power supply.
To prevent the battery from being discharged
Do not use the power outlet longer than necessary when the engine is not running.
Appliances that may not operate properly (115 VAC)
The following 115 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
549
4-3. Do-it-yourself maintenance
4
Maintenance and care
CAUTION
The engine compartment contains many mechanisms and fluids that may move sud-
denly, become hot, or become electrically energized. To avoid death or serious injury,
observe the following precaution:
When working on the engine compartment
Keep hands, clothing, and tools away from the moving fans and engine drive belt.
Be careful not to touch the engine, radiator, exhaust manifold, etc. right after driv-
ing as they may be hot. Oil and other fluids may also be hot.
Do not leave anything that may burn easily, such as paper or rags, in the engine
compartment.
Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel
and battery fumes are flammable.
Be extremely cautious when working on the battery. It contains poisonous and
corrosive sulfuric acid.
Items
Parts and tools
Engine oil level
(
P. 558)
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel, funnel (used
only for adding engine oil)
Fuses
(
P. 589)
Fuse with same amperage rating as
original
Tire inflation pressure
(
P. 578)
• Tire pressure gauge
• Compressed air source
Headlight aim
(
P. 606)
• Phillips-head screwdriver
Radiator and condenser
(
P. 564)
Washer fluid
(
P. 569)
• Water washer fluid containing anti-
freeze (for winter use)
• Funnel
554
4-3. Do-it-yourself maintenance
Engine compartment
Battery
(
P. 566)
Engine oil level dipstick
(
P. 558)
Engine oil filler cap
(
P. 558)
Brake fluid reservoir
(
P. 564)
Washer fluid tank
(
P. 569)
Electric cooling fans
Condenser
(
P. 564)
Radiator
(
P. 564)
Engine coolant reservoir
(
P. 562)
Fuse boxes
(
P. 589)
589
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. 555)
Open the fuse box cover.
Engine compartment (type A fuse box)
Push the tabs in and lift the lid
off.
Engine compartment (type B fuse box)
Push the tabs in and lift the lid
off.
Driver's side instrument panel
Remove the lid.
STEP
1
STEP
2
STEP
3
590
4-3. Do-it-yourself maintenance
Passenger's side instrument panel
Remove the lid.
Trunk
Remove the lid.
After a system failure, see “Fuse layout and amperage ratings”
for details about which fuse to check. (
P. 593)
STEP
4
591
4-3. Do-it-yourself maintenance
4
Maintenance and care
Remove the fuse with the pull-
out tool.
Check if the fuse has blown.
Type A and B
Normal fuse
Blown fuse
Replace it with one of an appro-
priate
amperage
rating.
The
amperage rating can be found
on the fuse box lid.
STEP
5
STEP
6
Type A
Type B
592
4-3. Do-it-yourself maintenance
Type C and D
Normal fuse
Blown fuse
Contact your Lexus dealer.
Type C
Type D
593
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
PTC HTR 3
25 A
PTC heater
2
PTC HTR 1
25 A
PTC heater
3
VSSR
5 A
Electric power control system
4
ALT
180 A
AIR SUS, HTR, DEFOG, FAN NO.1,
H-LP CLN, PTC HTR 2, PTC HTR,
RR A/C, E/G RM1, D-J/B ALT,
P-J/B ALT, LUG-J/B ALT
5
P-J/B ALT
60 A
P P/SEAT 1, P P/SEAT 2, A/C,
RR SEAT, P-IG1-1, P-IG1-2, P-IG1-3,
P-IG1-4, P-ACC, P-CIG, AIR SUS,
climate control seat system
6
FAN NO.1
80 A
Electric cooling fans
7
E/G RM1
80 A
DEICER, WIP, E/G RM-IG1-1,
E/G RM-IG1-2, NV-IR, FR FOG,
FR CTRL ALT, ABS MTR1
594
4-3. Do-it-yourself maintenance
Fuse
Ampere
Circuit
8
D-J/B ALT
80 A
OBD, D P/SEAT, TI&TE, AM1,
S/ROOF, D-IG1-1, D-IG1-2, D-IG1-3,
D-IG1-4, D-ACC, PWR OUTLET,
PANEL, climate control seat system
9
PTC HTR
60 A
PTC HTR 1, PTC HTR 3
10
LUG-J/B ALT
50 A
PTL, RL SEAT, B/ANC, FUEL OPN,
RR S/SHADE, PSB, RR-IG1-1,
RR-IG1-2, RR-IG1-3, RR-ACC,
RR-CIG
11
RR A/C
30 A
Air conditioning system
12
AIR SUS
40 A
Electronically modulated air suspen-
sion system
13
HTR
50 A
Air conditioning system
14
NOISE FILTER
40 A
Condenser
15
DEFOG
40 A
Rear window defogger
16
PTC HTR 2
50 A
PTC heater
17
H-LP CLN
30 A
Headlight cleaner
18
EPS
80 A
EPS
19
EFI
80 A
VVT, ETCS, ABS MAIN 1, EDU1,
EDU2, A/F, ECU-IG, IGN, INJ, P-J/B
20
E/G RM B
80 A
D/C CUT 1, FR CTRL BAT, EPS ECU,
ABS MAIN 2, ABS MTR2, ST,
H-LP RL, H-LP LL
21
EFI NO.1
40 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
22
E/G RM B2
30 A
ABS MAIN 3, EPS ECU, D/C CUT 2
595
4-3. Do-it-yourself maintenance
4
Maintenance and care
Engine compartment (type B fuse box)
Fuse
Ampere
Circuit
23
D-J/B B
40 A
D-DOOR 1, HAZ, D-DOOR 2,
STR LOCK, STOP, SECURITY
24
LUG J/B B
40 A
STOP LP 1, STOP LP 2, TAIL, E-PKB,
capacitor
25
P-J/B B
40 A
P DOOR 1, P RR DOOR, AM2,
RADIO NO.1, P-D/C CUT,
P DOOR 2, PMG, AMP
26
VGRS
40 A
VGRS
27
BAT VB
30 A
VSSR
Fuse
Ampere
Circuit
1
DEICER
25 A
Windshield wiper de-icer
2
WIP
30 A
Windshield wiper
3
ABS MAIN 2
10 A
ABS, VSC, VDIM
4
IGCT 1
25 A
Smart access system with push-button
start
5
EPS ECU
10 A
EPS
6
FR CTRL BAT
30 A
Headlight high beams, horns
596
4-3. Do-it-yourself maintenance
7
E/G RM-IG1-2
10 A
AFS, headlight high beams, parking
lights, side marker lights, horns, alarm,
windshield washer, exhaust system,
headlight cleaner
8
E/G RM-IG1-1
10 A
Charging system, EPS, electric cool-
ing fans, AFS
9
H-LP LL
15 A
Headlight low beams
10
ABS MAIN 1
10 A
Brake system, pre-collision seat belt
11
H-LP RL
15 A
Headlight low beams
12
ETCS
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
13
NV IR
10 A
Cruise control system
14
IGN
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, brake system, airbag system
15
ECU-IG
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, stop lights, pre-collision seat belt,
charging system
16
D/C CUT 1
30 A
ECU-B, D MPX-B 1, D MPX-B 2,
P MPX-B, RR MPX-B 1, RR MPX-B 2,
DOME
17
ECU-B
10 A
Headlight high beams, parking lights,
horns, alarm, windshield washer, pre-
collision seat belt, headlight cleaner
18
A/F
15 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, exhaust system
Fuse
Ampere
Circuit
597
4-3. Do-it-yourself maintenance
4
Maintenance and care
19
EDU2
25 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
20
FR CTRL ALT
20 A
Windshield washer, alarm, headlight
cleaner, parking lights, side maker
lights
21
EDU1
25 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
22
RELIEF VLV
10 A
Fuel system
23
FR FOG
15 A
Front fog lights
24
A/C W/P
10 A
Air conditioning system, electric cool-
ing fans
25
H-LP LVL
10 A
Discharge headlights, headlight high
beams, parking lights, side marker
lights, horns, alarm, windshield washer
26
P-J/B
10 A
P IG2, P RR-IG2
27
INJ
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
28
D/C CUT 2
30 A
P MPX-B, RR ECU-B
29
ECU-B 2
5 A
Brake system
30
ABS MAIN 3
10 A
Brake system, pre-collision seat belt
31
EFI MAIN 2
25 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, exhaust system
32
EFI MAIN
25 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, fuel system
Fuse
Ampere
Circuit
598
4-3. Do-it-yourself maintenance
33
EFI
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, fuel system
34
EFI-B
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
35
ST
30 A
Starter system
36
ABS MTR1
50 A
Brake system
37
ABS MTR2
50 A
Brake system
38
VVT
40 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
Fuse
Ampere
Circuit
599
4-3. Do-it-yourself maintenance
4
Maintenance and care
Driver’s side instrument panel
Fuse
Ampere
Circuit
1
D-IG1-3
10 A
Automatic transmission, power door
lock system, cruise control system,
brake system, rear window defogger,
moon roof, pre-collision seat belt,
head restraints, power outlet, turn sig-
nal lights, climate control seat system,
audio system
2
D-IG1-2
5 A
Cruise control system
3
D-IG1-4
15 A
Starter system, climate control seat
system
4
D-IG1-1
5 A
Main body ECU, pre-collision seat
belt, tilt and telescopic steering,
starter system
5
PWR OUTLET
15 A
Power outlet
6
D-ACC
5 A
Power door lock system
7
S/ROOF
30 A
Moon roof
8
TI&TE
30 A
Tilt and telescopic steering
600
4-3. Do-it-yourself maintenance
9
AM1
5 A
Power door lock system
10
OBD
10 A
On-board diagnosis system
11
D P/SEAT
30 A
Front seat adjustment
12
D S/HTR
20 A
Climate control seat system
13
D RR S/HTR
30 A
Climate control seat system
14
D MPX-B 1
10 A
Meters and gauges, front seat adjust-
ment, rear seat adjustment, tilt and
telescopic steering, power door lock
system, cruise control system
15
DOME
10 A
Interior lights, clock
16
D MPX-B 2
10 A
Audio system
17
PANEL
10 A
Fuel filler door opener, interior lights,
audio system
18
SECURITY
5 A
Smart access system with push-button
start, theft deterrent system
19
STR LOCK
20 A
Tilt and telescopic steering
20
D DOOR 2
10 A
Power door lock system
21
HAZ
10 A
Turn signal lights
22
D RR DOOR
25 A
Interior lights, power door lock sys-
tem, power windows
23
D DOOR 1
25 A
Interior lights, outside rear view mir-
ror, power door lock system, power
windows, outside rear view mirror
defogger
24
STOP
5 A
Stop lights
25
AMP
30 A
Audio system
Fuse
Ampere
Circuit
601
4-3. Do-it-yourself maintenance
4
Maintenance and care
Passenger’s side instrument panel
Fuse
Ampere
Circuit
1
P-IG1-2
5 A
Audio system
2
P-IG1-3
5 A
VGRS
3
P-IG1-1
10 A
Audio system, navigation system,
power door lock system, VGRS, air
conditioning system, head restraints,
pre-collision seat belt, intuitive park-
ing assist, tire pressure warning sys-
tem
4
P-IG1-4
10 A
Climate control seat system
5
P-CIG
15 A
Cigarette lighter
6
P-ACC
5 A
Audio system, navigation system,
clock, Lexus link system, cruise con-
trol system
7
A/C
10 A
Air conditioning system
8
P S/HTR
20 A
Climate control seat system
9
P P/SEAT 2
30 A
Front seat adjustment
10
RR SEAT
30 A
Rear seat adjustment
602
4-3. Do-it-yourself maintenance
11
P P/SEAT 1
30 A
Front seat adjustment
12
P RR S/HTR
30 A
Climate control seat system
13
P IG2
5 A
Tilt and telescopic steering, smart
access system with push-button start,
meters and gauges, electric power
control system, Lexus link system
14
P RR-IG2
5 A
On-board diagnosis system, Lexus
link system
15
P MPX-B
10 A
Power door lock system, front seat
adjustment, rear seat adjustment,
VGRS, smart access system with
push-button start, starter system, intu-
itive parking assist
16
AIR SUS
20 A
Electronically modulated air suspen-
sion system
17
AM2
10 A
Power door lock system
18
RADIO NO.1
20 A
Air conditioning system, navigation
system, Lexus link system
19
PMG
5 A
Electric power control system
20
P-D/C CUT
5 A
Headlight switch, windshield wiper
and washer, horn, tilt and telescopic
steering, power windows, power door
lock system, door sunshade, rear sun-
shade, rear seat adjustment, steering
wheel switches
21
P DOOR 2
10 A
Power door lock system
22
P RR DOOR
25 A
Interior lights, power door lock sys-
tem, power windows
Fuse
Ampere
Circuit
603
4-3. Do-it-yourself maintenance
4
Maintenance and care
Trunk
23
P DOOR 1
25 A
Interior lights, outside rear view mir-
ror, power door lock system, power
windows, outside rear view mirror
defogger
24
AMP
30 A
Audio system
Fuse
Ampere
Circuit
1
RR-IG1-3
10 A
Climate control seat system
2
RR-IG1-4
10 A
Rear seat adjustment
3
RR-IG1-2
10 A
Power door lock system, cool box, air
conditioning system
4
RR-IG1-1
5 A
Capacitor, brake system, rear seat
adjustment
5
RR-ACC
5 A
Audio system, rear seat entertainment
system
6
RR-CIG
15 A
Cigarette lighter
7
AC100/115V
15 A
Power outlet
Fuse
Ampere
Circuit
604
4-3. Do-it-yourself maintenance
8
RL SEAT
30 A
Rear seat adjustment
9
B/ANC
10 A
Shoulder anchor
10
RR S/SHADE
10 A
Rear sunshade
11
PSB
30 A
Pre-collision seat belt
12
PTL
30 A
Power trunk opener and closer
13
FUEL OPN
15 A
Fuel filler door opener, power trunk
opener and closer
14
RR MPX-B 1
10 A
Audio system, rear seat entertainment
system, power trunk opener and
closer
15
RR MPX-B 2
5 A
Power door lock system, rear seat
adjustment, interior lights, power
trunk opener and closer, alarm
16
IGCT 3
5 A
17
BATT FAN
20 A
Electric cooling fan
18
B-FAN RLY
5 A
Electric cooling fan
19
RR ECU-B
5 A
Seat belt buckle lights, trunk light
20
ABS MAIN 4
10 A
Capacitor
21
STOP LP 1
10 A
Stop lights, back-up lights
22
STOP LP 2
10 A
Stop lights, high-mounted stoplights
23
TAIL
5 A
Tail lights, license plate lights
24
E-PKB
30 A
Brake system
Fuse
Ampere
Circuit
605
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. 608)
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 before the entire wiring harness is damaged.
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 fuses or the fuse box.
NOTICE
Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus
dealer.
610
4-3. Do-it-yourself maintenance
Right side
Remove the securing bolts and
nut, and move the fuse block.
Turn the cover counterclockwise
and remove it.
Turn the bulb base counterclock-
wise.
Unplug
the
connector
while
depressing the lock release.
STEP
2
STEP
3
STEP
4
612
4-3. Do-it-yourself maintenance
Install the bolt and clips.
Front turn signal lights
When replacing the bulbs:
Left side
Remove the securing bolt and
move the washer fluid filler open-
ing.
Right side
Remove the securing bolts and
nut, and move the fuse block.
STEP
4
STEP
1
650
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. 146), consider each of the following points.
The engine will not start, even when 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 once more following correct starting
procedures. (
P. 146)
There may be a malfunction in the engine immobilizer system.
(
P. 97)
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. 660)
The battery terminal connections may be loose or corroded.
The starter motor does not turn over.
The following may be the cause of the problem:
The engine starting system may be malfunctioning due to an elec-
trical problem such as an open circuit or a blown fuse. However,
an interim measure is available to start the engine. (
P. 651)
457
3-8. Other interior features
3
Interior features
NOTICE
To avoid damaging the power outlet
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.
115 VAC
Do not use a 115 VAC appliance that requires more than 100 W.
If a 115 VAC appliance that consumes more than 100 W is used, the protection
circuit will cut the power supply.
To prevent the 12-volt battery from being discharged
Do not use the power outlet longer than necessary when the hybrid system is off.
Appliances that may not operate properly (115 VAC)
The following 115 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
513
4-3. Do-it-yourself maintenance
4
Maintenance and care
CAUTION
The engine compartment contains many mechanisms and fluids that may move sud-
denly, become hot, or become electrically energized. To avoid death or serious injury,
observe the following precautions:
When working on the engine compartment
Make sure that the indicator on the “POWER” switch and the “READY” indicator
are both off.
Keep hands, clothing, and tools away from the moving fans and engine drive belt.
Be careful not to touch the engine, power control unit, radiator, exhaust manifold,
etc. right after driving as they may be hot. Oil and other fluids may also be hot.
Do not leave anything that may burn easily, such as paper or rags, in the engine
compartment.
Do not smoke, cause sparks or expose an open flame to fuel. Fuel fumes are flam-
mable.
Items
Parts and tools
Engine oil level
(
P. 521)
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel, funnel (used
only for adding engine oil)
Fuses
(
P. 554)
Fuse with same amperage rating as
original
Tire inflation pressure
(
P. 543)
• Tire pressure gauge
• Compressed air source
Headlight aim
(
P. 574)
• Phillips-head screwdriver
Radiator and condenser
(
P. 528)
Washer fluid
(
P. 530)
• Water or washer fluid containing
antifreeze (for winter use)
• Funnel
518
4-3. Do-it-yourself maintenance
Engine compartment
Power
control
unit
coolant
reservoir
(
P. 526)
Engine oil level dipstick
(
P. 521)
Engine oil filler cap
(
P. 521)
Brake fluid reservoir
(
P. 529)
Fuse boxes
(
P. 554)
Washer fluid tank
(
P. 530)
Power
control
unit
coolant
radiator
(
P. 528)
Electric cooling fans
Condenser
(
P. 528)
Engine coolant radiator
(
P. 528)
Engine coolant reservoir
(
P. 526)
554
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. 519) and the 12-
volt battery cover (
P. 531).
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
555
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.
Passenger's side instrument panel
Remove the lid.
556
4-3. Do-it-yourself maintenance
Trunk (type A fuse box)
Remove the lid.
Trunk (type B fuse box)
Remove the cover.
Trunk (type C fuse box)
Remove the terminal cover.
After a system failure, see “Fuse layout and amperage ratings”
for details about which fuse to check. (
P. 559)
STEP
4
557
4-3. Do-it-yourself maintenance
4
Maintenance and care
Remove the fuse with the pull-
out tool.
Check if the fuse has blown.
Type A and B
Normal fuse
Blown fuse
Replace it with one of an appro-
priate
amperage
rating.
The
amperage rating can be found
on the fuse box lid.
STEP
5
STEP
6
Type A
Type B
558
4-3. Do-it-yourself maintenance
Type C and D
Normal fuse
Blown fuse
Contact your Lexus dealer.
Type C
Type D
559
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
DEICER
25 A
Windshield wiper de-icer
2
WIP
30 A
Windshield wiper
3
ABS MAIN 2
10 A
Brake system
4
IGCT 1
25 A
INV W/P
5
EPS ECU
10 A
EPS
6
FR CTRL BAT
30 A
Headlight high beams, horns
7
E/G RM-IG1-2
10 A
AFS, multiport fuel injection system/
sequential multiport fuel injection sys-
tem, headlight cleaner, pre-collision
system
8
E/G RM-IG1-1
10 A
Air conditioning system, EPS, electric
cooling fans, AFS
9
H-LP LL
15 A
Headlight low beams
10
ABS MAIN 1
10 A
Brake system
11
H-LP RL
15 A
Headlight low beams
12
ETCS
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
560
4-3. Do-it-yourself maintenance
13
NV IR
10 A
Pre-collision system
14
IGN
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, brake system, airbag system
15
ECU-IG
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, stop lights, hybrid system
16
D/C CUT 1
30 A
ECU-B, D MPX-B 1, DOME, D MPX-
B 2
17
ECU-B
10 A
Headlight low beams
18
A/F
15 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
19
EDU2
25 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
20
FR CTRL ALT
20 A
Windshield washer, alarm, headlight
cleaner, parking lights, side marker
lights
21
EDU1
25 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
22
RELIEF VLV
10 A
Fuel system
23
FR FOG
15 A
Front fog lights
24
A/C W/P
10 A
Air conditioning system
25
H-LP LVL
10 A
Discharge headlights, headlight high
beams
26
P-J/B
10 A
P IG2, P RR-IG2
Fuse
Ampere
Circuit
561
4-3. Do-it-yourself maintenance
4
Maintenance and care
27
INJ
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
28
D/C CUT 2
30 A
P MPX-B, RR MPX-B 1, RR MPX-B 2
29
IGCT2
25 A
IGCT2 NO.2, hybrid system
30
ABS MAIN3
10 A
Brake system
31
EFI MAIN2
25 A
EFI, EFI-B, multiport fuel injection sys-
tem/sequential multiport fuel injection
system
32
EFI MAIN
25 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, fuel system
33
EFI
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, fuel system
34
EFI-B
10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, fuel system
35
INV W/P
10 A
Hybrid system
36
ST
30 A
37
ABS MTR1
50 A
Brake system
38
ABS MTR2
50 A
Brake system
39
VVT
40 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
Fuse
Ampere
Circuit
562
4-3. Do-it-yourself maintenance
Engine compartment (type B fuse box and C fuse box)
Fuse
Ampere
Circuit
1
IGCT2 NO.2
10 A
IGCT 3, hybrid system
2
PTC HTR 3
25 A
PTC heater
3
PTC HTR 1
25 A
PTC heater
Type B fuse box
Type C fuse box
563
4-3. Do-it-yourself maintenance
4
Maintenance and care
Driver’s side instrument panel
Fuse
Ampere
Circuit
1
D-IG1-3
10 A
Transmission, power door lock system,
air conditioning system, brake system,
rear window defogger, moon roof,
main body ECU, pre-collision seat
belt, electric parking brake, power
outlet, climate control seat system,
turn signal lights, active stabilizer sus-
pension system
2
D-IG1-2
5 A
Cruise control system
3
D-IG1-4
15 A
Heated steering wheel
4
D-IG1-1
5 A
Front seat adjustment, tilt and tele-
scopic steering, pre-collision system,
hybrid system
5
PWR OUTLET
15 A
Power outlet
6
D-ACC
5 A
Main body ECU
7
S/ROOF
30 A
Moon roof
8
TI&TE
30 A
Tilt and telescopic steering
9
AM1
5 A
Main body ECU
10
OBD
10 A
On-board diagnosis system
11
D P/SEAT
30 A
Front seat adjustment
564
4-3. Do-it-yourself maintenance
12
D S/HTR
20 A
Climate control seat system
13
D RR S/HTR
30 A
Climate control seat system
14
D MPX-B 1
10 A
Gauges and meters, front seat adjust-
ment, tilt and telescopic steering,
power door lock system
15
DOME
10 A
Interior lights, clock
16
D MPX-B 2
10 A
Audio system
17
PANEL
10 A
Fuel filler door opener, power trunk
lid, console box light, interior lights,
coin holder light, glove box light, turn
signal lights, electric parking brake,
navigation system, power outlet, cli-
mate control seat system, odometer,
trip meter, audio system, cool box,
rear seat relaxation system
18
SECURITY
5 A
Smart access system with push-button
start, theft deterrent system
19
STR LOCK
20 A
Tilt and telescopic steering
20
D DOOR 2
10 A
Power door lock system
21
HAZ
10 A
Emergency flashers
22
D RR DOOR
25 A
Interior lights, door closer, power
door lock system, power windows
23
D DOOR 1
25 A
Interior lights, theft deterrent system,
outside rear view mirror, power door
lock system, door closer, power win-
dows, outside rear view mirror defog-
ger
24
STOP
5 A
Stop lights
25
AMP
30 A
Fuse
Ampere
Circuit
565
4-3. Do-it-yourself maintenance
4
Maintenance and care
Passenger’s side instrument panel
Fuse
Ampere
Circuit
1
P-IG1-2
5 A
Pre-collision system
2
P-IG1-3
5 A
VGRS
3
P-IG1-1
10 A
Navigation system, power door lock
system, VDIM, air conditioning sys-
tem, pre-collision seat belt, intuitive
parking assist, tire pressure warning
system
4
P-IG1-4
10 A
Climate control seat system, air con-
ditioning system
5
P-CIG
15 A
Cigarette lighter
6
P-ACC
5 A
Navigation system, clock, intuitive
parking assist
7
A/C
10 A
Air conditioning system
8
P S/HTR
20 A
Climate control seat system
9
P P/SEAT 2
30 A
Front seat adjustment
10
RR SEAT
30 A
Rear seat adjustment
11
P P/SEAT 1
30 A
Front seat adjustment
12
P RR S/HTR
30 A
Climate control seat system
566
4-3. Do-it-yourself maintenance
13
P IG2
5 A
Tilt and telescopic steering, smart
access system with push-button start,
gauges and meters
14
P RR-IG2
5 A
Lexus link system
15
P MPX-B
10 A
Power door lock system, front seat
adjustment, VDIM, smart access sys-
tem with push-button start, VGRS,
hybrid system, intuitive parking assist,
rear seat adjustment
16
AIR SUS
20 A
Electronically modulated air suspen-
sion system
17
AM2
10 A
Main body ECU
18
RADIO NO.1
20 A
Navigation system, Lexus link system
19
PMG
5 A
20
P-D/C CUT
5 A
Power windows, steering wheel
switches
21
P DOOR 2
10 A
Power door lock system
22
P RR DOOR
25 A
Interior lights, power door lock sys-
tem, door closer, power windows
23
P DOOR 1
25 A
Interior lights, outside rear view mir-
ror, power door lock system, door
closer, power windows, outside rear
view mirror defogger
24
AMP
30 A
Audio system
Fuse
Ampere
Circuit
567
4-3. Do-it-yourself maintenance
4
Maintenance and care
Trunk (type A fuse box)
Fuse
Ampere
Circuit
1
RR-IG1-3
10 A
Climate control seat system
2
RR-IG1-4
10 A
Rear seat relaxation system
3
RR-IG1-2
10 A
Power door lock system, power trunk
lid, cool box, air conditioning system
4
RR-IG1-1
5 A
Capacitor, electric parking brake,
pre-collision seat belt, rear seat relax-
ation system, active stabilizer suspen-
sion system, hybrid system
5
RR-ACC
5 A
Audio system, rear seat entertainment
system
6
RR-CIG
15 A
Cigarette lighter
7
AC100/115V
15 A
Power outlet
8
RL SEAT
30 A
Rear seat adjustment
9
B/ANC
10 A
Shoulder anchor
10
RR S/SHADE
10 A
Rear sunshade
11
PSB
30 A
Pre-collision seat belt
12
PTL
30 A
Power trunk lid
13
FUEL OPN
15 A
Fuel filler door opener, power trunk lid
568
4-3. Do-it-yourself maintenance
Trunk (type B fuse box)
14
RR MPX-B 1
10 A
Power trunk lid, rear seat entertain-
ment system
15
RR MPX-B 2
5 A
Power door lock system, rear seat
adjustment, interior lights, trunk light,
power trunk lid
16
IGCT 3
5 A
Hybrid system
17
BATT FAN
20 A
Battery cooling fan
18
B-FAN RLY
5 A
Battery cooling fan
19
RR ECU-B
5 A
Electric parking brake
20
ABS MAIN 4
10 A
Capacitor
21
STOP LP 1
10 A
Stop lights, back-up lights
22
STOP LP 2
10 A
High mounted stop light, stop lights
23
TAIL
5 A
Tail lights, license plate lights
24
E-PKB
30 A
Electric parking brake
Fuse
Ampere
Circuit
1
E/G R/B DC/DC
160 A
AIR SUS, HTR, DEFOG, FAN NO.1,
H-LP CLN, PTC HTR, E/G RM 1, P-J/
B DC/DC
Fuse
Ampere
Circuit
569
4-3. Do-it-yourself maintenance
4
Maintenance and care
2
LUG-J/B DC/DC
80 A
PTL, RL SEAT, B/ANC, FUEL OPN,
RR S/SHADE, PSB, RR-IG1-1, RR-
IG1-2, RR-IG1-3, RR-IG1-4, RR-
ACC, RR-CIG, AC100/115V, BATT
FAN
3
LH-J/B DC/DC
80 A
OBD, D P/SEAT, TI&TE, AM1, D S/
HTR, S/ROOF, D RR S/HTR, D-IG1-1,
D-IG1-2, D-IG1-3, D-IG1-4, D-ACC,
PWR OUTLET, PANEL
4
RR A/C
30 A
Air conditioning system
5
DC/DC
180 A
Hybrid system
6
E/G R/B BATT
160 A
VGRS, OIL PMP, EFI NO.1, EFI, E/G
RM B, P-J/B B, E/G RM B2
7
EPS
80 A
EPS, active stabilizer suspension sys-
tem
8
LH-J/B BATT
40 A
D DOOR 1, D RR DOOR, HAZ, D
DOOR 2, STR LOCK, STOP, SECU-
RITY
9
LUG-J/B BATT
40 A
STOP LP 1, STOP LP 2, TAIL, B-FAN
RLY, ABS MAIN 4, RR ECU-B, E-
PKB
Fuse
Ampere
Circuit
570
4-3. Do-it-yourself maintenance
Trunk (type C fuse box)
Fuse box near the power control unit
There are high voltage parts and
wiring
near
the
fuse
box.
For
inspection and replacement of the
fuses, contact your Lexus dealer.
Fuse
Ampere
Circuit
1
MAIN
200 A
All electrical components
571
4-3. Do-it-yourself maintenance
4
Maintenance and care
Fuse layout and amperage ratings
Fuse
Ampere
Circuit
1
P-J/B DC/DC
100 A
P P/SEAT 1, A/C, RR SEAT, P P/SEAT
2, P S/HTR, P RR S/HTR, P-IG1-1, P-
IG1-2, P-IG1-3, P-IG1-4, P-ACC, P-
CIG, AIR SUS
2
E/G RM1
80 A
DEICER, WIP, E/G RM-IG1-1, E/G
RM-IG1-2, NV IR, FR FOG, FR CTRL
ALT, ABS MTR1, A/C W/P, front fog
lights
3
FAN NO.1
80 A
Electric cooling fans
4
PTC HTR
50 A
PTC HTR 1, PTC HTR 3
5
AIR SUS
40 A
Electronically modulated air suspen-
sion system
6
HTR
50 A
Air conditioning system
7
DEFOG
40 A
Rear window defogger
8
H-LP CLN
30 A
Headlight cleaner
9
E/G RM B
80 A
D/C CUT 1, FR CTRL BAT, EPS ECU,
ABS MAIN 2, ABS MTR2, IGCT1, H-
LP RL, H-LP LL, H-LP LVL, headlight
low beams
572
4-3. Do-it-yourself maintenance
10
EFI
80 A
VVT, ETCS, ABS MAIN 1, EDU1,
EDU2, A/F, RELIEF VLV, ECU-IG,
IGN, INJ, P-J/B
11
OIL PMP
60 A
Transmission
12
EFI NO.1
40 A
EFI MAIN, EFI MAIN NO. 2
13
VGRS
40 A
VGRS
14
P-J/B B
40 A
P DOOR 1, P RR DOOR, AM2,
RADIO NO.1, P-D/C CUT, P DOOR
2, AMP
15
E/G RM B2
40 A
ABS MAIN 3, IGCT2, D/C CUT 2
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. 577)
If the replaced fuse blows again, have the vehicle inspected by your Lexus
dealer.
If there is an overload in a circuit
The fuses are designed to blow before the entire wiring harness is damaged.
Fuse
Ampere
Circuit
573
4-3. Do-it-yourself maintenance
4
Maintenance and care
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 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 fuses or the fuse box.
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 your Lexus
dealer.
5
When trouble arises
619
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. 163)
One of the following may be the cause of the problem:
The electronic key may not be functioning properly. (
P. 625)
There may be a malfunction in the immobilizer system. (
P. 113)
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. 620)
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. 628)
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. 628)
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.