fuse LEXUS RX400H 2008 User Guide

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4-3. Do-it-yourself maintenance
4
Maintenance and care
RX400h_U
24RDI FAN NO.240Electric cooling fan
25HAZ15Turn signal lights, emergency flashers
26MPX-B17. 5Electric power steering system
27AM2 NO.130“GAUGE NO.2”, “IGN”, “INJ” and
“ST” fuses
28HORN10Horns
29MAIN40
“H-LP L LWR”, “H-LP L UPR”, “H-LP
R LWR”, “H-LP R UPR” and “DRL”
fuses
30IGCT NO.150
“INV W/P”, “IGCT NO.2”, “IGCT
NO.3”, “IGCT NO.4” and “IGCT
NO.5” fuses
31RADIO NO.115Audio system
32ECU-B NO.17. 5
Theft deterrent system, air condition-
ing system, gauges and meters, moon
roof, multiplex communication system
33DOME7. 5
Personal lights, interior lights, vanity
lights, engine switch light, gauges and
meters, navigation system
34ECU-B NO.27. 5Wireless remote control
35AMP30Audio system
36DOOR NO.1 25Power door lock system
37A/F25Air/fuel control system
38CRT7. 5Navigation system screen, rear seat
entertainment system
39H-LP R LWR15Right-hand headlight (low beam)
40INV W/P15Hybrid system
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
RX400h_U■
Engine compartment (type C)
41IGCT NO.510Hybrid system
FuseAmpereCircuit
42WAT E R P U M P10Air conditioning system
43SEAT HTR20Seat heaters
44IGCT NO.2 10Hybrid system
45IGCT NO.310Hybrid system, fuel pump
46IGCT NO.410Emission control system, transaxle
control system, air/fuel control system
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
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Maintenance and care
RX400h_U■
Driver’s side instrument panel
FuseAmpereCircuit
47RR DOOR RH20Rear right side power window
48RR DOOR LH20Rear left side power window
49FUEL OPN7. 5Fuel filler door opener
50FR FOG15Front fog lights
51OBD7. 5On-board diagnosis system
52FR DEF25Windshield wiper de-icer and all com-
ponents in “MIR HTR” fuses
53STOP10
Tail lights, high mounted stoplight,
vehicle dynamics integrated manage-
ment, shift lock control system,
multiport fuel injection system/
sequential multiport fuel injection sys-
tem
54TI&TE30Tilt and telescopic steering
55MPX-B7. 5Engine immobilizer system
56AM1 7. 5Starter system

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57RR FOG 7. 5No circuit
58AIR SUS7. 5No circuit
59DOOR NO.225Multiplex communication system
60S/ROOF 30Moon roof
61TA I L10
Front fog lights, instrument cluster
lights, instrument panel lights, front
side marker lights, tail lights, license
plate lights, towing converter
62PA N E L7. 5
Glove box light, instrument cluster
lights, instrument panel lights, console
box light, audio system, power outlet,
garage door opener switch, transmis-
sion system, headlight cleaner, seat
heaters, steering switches, power
back door
63ECU-IG NO.17. 5
Power rear view mirror control, moon
roof, multiplex communication system,
shift lock control system, multiplex
communication system (power door
lock system, wireless remote control
system), driving position memory sys-
tem, vehicle dynamics integrated
management, windshield wipers,
transmission, seat heaters, power
seats, tilt and telescopic steering,
power back door
64ECU-IG NO.210
Automatic headlight leveling system,
vehicle dynamics integrated manage-
ment, dynamic laser cruise control,
headlight cleaner, adaptive front-light-
ing system
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
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Maintenance and care
RX400h_U
65HEATER7. 5
Electric cooling fan, air conditioning
system, rear window defogger, engine
switch, windshield wiper de-icer
66WA S H E R20Windshield washer
67SEAT HTR20No circuit
68GAUGE NO.17. 5
Instrument cluster lights, instrument
panel lights, emergency flashers, seat
belt, power outlet, multiport fuel injec-
tion system/sequential multiport fuel
injection system, back-up lights
69FR WIP30Windshield wipers
70RR WIP15Rear window wiper
71INJ 20
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
72IGN10
SRS airbag system, multiport fuel
injection system/sequential multiport
fuel injection system, front passenger
occupant classification system, stop
lights, hybrid vehicle immobilizer sys-
tem
73GAUGE NO.27. 5Gauge and meters
74ECU-ACC7. 5
Navigation system display, power rear
view mirror control, shift lock control
system, multiplex communication sys-
tem
75CIG15Po w e r o u t l e t
76PWR OUTLET
NO.115Po w e r o u t l e t
FuseAmpereCircuit

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RX400h_U
77RADIO NO.27. 5
Instrument cluster lights, instrument
panel lights, navigation system, audio
system
78MIR HTR10Outside rear view mirror defogger
79PWR30
Power window, multiplex communica-
tion system (power door lock system,
wireless remote control system), out-
side rear view mirror
80P/ S E AT30Po w e r s e a t s
■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. 3 6 5 )
●If the replaced fuse blows again, have the vehicle inspected by your Lexus dealer.
■If there is an overload in the circuits
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.
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
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Maintenance and care
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NOTICE
■Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus
dealer.

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RX400h_U
6-3. Initialization
Items to initialize
ItemWhen to initializeReference
Power window
• After reconnecting or changing the battery
• After changing a fuse
P. 7 2
Power back door
• After reconnecting or changing the battery
• After changing a fuse
P. 4 4
Engine oil maintenance
dataAfter changing engine oilP. 3 1 8
Ti r e p r e s s u r e w a r n i n g
system
• When changing the tire inflation pressure by changing traveling speed
or load weight, etc.
•When changing the tire size.
P. 3 3 1
After reconnecting or performing maintenance on the 12-volt battery, the
hybrid system may not start. (
→P. 328) Also, the following items must be
initialized for normal system operation.

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Alphabetical index
RX400h_U
Preparing and checking before winter ...................................... 182
Engine oil maintenance data ............. 321
Engine switch............................................ 131
Engine switch light ............................... 260
EPS............................................................... 169
Event data recorder............................ 386
Floor mat.................................................. 283
Fluid Brake ....................................................... 325
Washer ................................................... 329
Fog lights Replacing light bulbs ....................... 365
Switch ..........................................................151
Wattage ................................................... 441
Foot well lighting .................................. 260
Front fog lights Replacing light bulbs ....................... 365
Switch ..........................................................151
Wattage ................................................... 441
Front passenger's seat belt
reminder light ....................................... 391
Front seats
Adjustment ...............................................49
Driving position memory ................. 55
Flattening seatbacks ........................... 50
Front side marker light
Replacing light bulbs ....................... 365
Wattage ................................................... 441
Front turn signal lights Replacing light bulbs ....................... 365
Wattage ................................................... 441 Fuel
Capacity .................................................433
Fuel gauge.............................................. 138
Gas station information ................. 484
Information ............................................ 442
Refueling.................................................... 78
Type .......................................................... 442
Fuel door ..................................................... 78
Fuel filler door ........................................... 78
Fuses ..........................................................352
Garage door opener .......................... 287
Gas station information......................484
Gauges ...................................................... 138
Glove box ................................................ 265
Glove box light ...................................... 266
Head restraints
Adjusting .................................................. 57
Headlight aim ......................................... 364
Headlight cleaner .................................. 156
Headlights
Discharge headlights precautions........................................375
Replacing light bulbs ....................... 365
Switch........................................................ 148
Wattage ....................................................441
Heaters
Seat heaters ......................................... 280
Side mirror.............................................204
Hood ........................................................... 313
Hooks Cargo hook ..........................................284
Shopping bag hook..........................284
F
G
H

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Alphabetical index
RX400h_U
Rear side marker lightsWattage.................................................... 441
Rear turn signal lights Replacing light bulbs........................365
Wattage.................................................... 441
Rear window de fogger.......................204
Rear window wiper ............................... 155
Replacing Fuses ........................................................ 352
Light bulbs.............................................365
Rear seat entertainment system controller battery............................350
Tires ......................................................... 408
Wireless remote control battery ..................................................348
Reporting safety defects for
U.S.A. owners ..................................... 464
RSE
Replacing controller battery ........350
RSE ........................................................... 233
Road accident cautions......................... 32
Roof luggage carrier .............................. 70
Scuff lighting ...........................................260
Seat belts Adjusting the seat belt........................ 59
Automatic Locking Retractor .......... 61
Child restraint system
installation ..............................................112
Cleaning and maintaining
the seat belts ..................................... 302
Emergency Locking Retractor........ 61
How to wear your seat belt............. 58
How your child should wear
the seat belt .......................................... 62 Pregnant women,
proper seat belt use .......................... 61
Reminder light....................................... 391
Seat belt extenders...............................62
Seat belt pretensioners ..................... 60
Seat heaters ............................................280
Seating capacity....................................... 181
Seats
Adjustment ...................................... 49, 52
Adjustment precautions ............ 51, 54
Child seats/child restraint system installation .............................. 112
Cleaning .................................................. 301
Driver's seat position memory ...... 55
Flattening seatbacks ........................... 50
Head restraint .........................................57
Properly sitting in the seat................ 89
Seat heaters ......................................... 280
Service reminder indicators ............ 140
Shift lever Transmission.......................................... 135
If the shift lever cannot be shifted from P..................................... 419
Shopping bag hooks ........................... 284
Side airbags ................................................. 91
Side marker lights
Replacing light bulbs ....................... 365
Switch........................................................ 148
Wattage ................................................... 441
Side mirror
Adjusting and folding ......................... 68
Mirror position memory ................... 55
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