663
4-3. Do-it-yourself maintenance
4
Maintenance and care
GX460_OM_OM60J63U_(U)Under the instrument panel
FuseAmpereCircuit
1P/O U T L E T15 APo w e r o u t l e t
2ACC7. 5 A
Outside rear view mirror motor,
BODY ECU, air conditioning system,
audio system, navigation system,
parking assist system, back up relay,
DSS#2 ECU, AT indicator, EFI ECU,
shift lock ECU, DCM, MAYDAY
ECU
3BKUP LP10 A
Back-up lights, audio system, multi
information display, DSS#2 ECU,
parking assist sensor
4TOW I N G B K L P10 ATo w i n g
5AV S20 AAir suspension system
6KDSS10 AKDSS ECU
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664
4-3. Do-it-yourself maintenance
GX460_OM_OM60J63U_(U)
74WD20 A4WD system, rear differential lock
8P/ S E AT F L30 AFront power seat (left)
9D/ L N O. 225 ADoor lock motor, glass hatch
opener, BODY ECU
10PSB30 APSB ECU
11TI & TE15 ATilt and telescopic steering
12FOG FR15 AFront fog lights
13OBD7. 5 ADLC 3
14A/C7. 5 AAir conditioning system
15AM17. 5 AStarting system
16DOOR RL25 ARear power window (left)
17ECU-IG NO.110 A
Shift lock ECU, VSC ECU, steering
sensor, yaw rate sensor, sequential
switch, auto wiper ECU, back up
relay, tilt & telescopic steering, PSB
ECU, DSS#1 ECU, front radar sensor,
AFS ECU, TIRE PRESS ECU,
DRIVER MON ECU
18IG17. 5 A
Front turn signal light, rear turn signal
light, side turn signal light, meter turn
signal light, trailer light, ALT, VSC, C/
C switch
FuseAmpereCircuit
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665
4-3. Do-it-yourself maintenance
4
Maintenance and care
GX460_OM_OM60J63U_(U)
19ECU-IG NO.210 A
Rear window defogger, outside rear
view mirror memory, seat heater/ven-
tilator switch, inverter relay, air condi-
tioning system, EC mirror, BODY
ECU, exhaust gas sensor, parking
assist sensor, navigation system,
DSS#2 ECU, meter switch, accessory
meter, folding seat ECU, O/H IG,
head light cleaner, rear air condition-
ing system, deicer, D-module, rain
sensor, air suspension, RR VLV ECU,
steering heater, LKA, P/SEAT IND
20S/HTR FR20 ASeat heater and ventilator
21P/ S E AT F R30 AFront power seat (right)
22DOOR P30 A
Front power window (passenger’s
side), outside rear view mirror mem-
ory
23DOOR10 APo w e r w i n d o w
24DOOR D25 AFront power window (driver’s side)
25DOOR RR25 ARear power window (right)
26S/ROOF25 AMoon roof
27WIP30 AWindshield wipers and washer
28WA S H E R20 AWindshield wipers and washer, rear
window wipers and washer
29COOLING10 ACool box
FuseAmpereCircuit
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666
4-3. Do-it-yourself maintenance
GX460_OM_OM60J63U_(U)
30IGN10 A
EFI ECU, C/OPN RLY, VSC ECU, air
bag ECU, smart entry & start system,
steering lock ECU, CAN gateway
ECU
31GAUGE7. 5 AMeter
32PA N E L7. 5 A
Switch illumination, glove box light,
cup holder lights, auxiliary box light,
navigation system, audio system, air
conditioning system, outside rear view
mirror switch, folding seat switch,
multi-information display, P/SEAT
IND, SHIFT, COOL BOX
33TA I L10 A
Front position lights, tail lights, license
plate lights, EFI ECU, rear fog lights,
towing, front fog lights
FuseAmpereCircuit
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667
4-3. Do-it-yourself maintenance
4
Maintenance and care
GX460_OM_OM60J63U_(U)
■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. 6 7 0 )
●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, 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 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 as soon as possible.
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740
5-2. Steps to take in an emergency
GX460_OM_OM60J63U_(U)
If the engine will not start
If the engine will not start even though correct starting procedures are
being followed (
→P. 183), 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. 183)
● There may be a malfunction in the engine immobilizer system.
(→ P. 1 1 9 )
■ The starter motor turns over slowly, 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 battery may be discharged. ( →P. 74 6 )
● 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. 744)
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830
Alphabetical index
GX460_OM_OM60J63U_(U)
Floor mats ................................................563
FluidBrake........................................................ 627
Power steering.................................... 629
Washer ................................................... 635
Fog lights
Replacing light bulbs........................ 674
Switch ...................................................... 237
Wattage.................................................. 769
Footwell light...........................................525
Four-wheel drive system ...................326
Front passenger occupant
classification system .......................... 143
Front passenger’s seat belt
reminder light...................................... 697
Front seats
Adjustment............................................... 67
Driving position memory.................. 82
Front side marker light Replacing light bulbs........................ 675
Wattage.................................................. 769
Front turn signal lights
Replacing light bulbs........................ 676
Switch ........................................................196
Wattage.................................................. 769
Fuel
Capacity................................................. 760
Fuel gauge ..............................................199
Fuel pump shut off system ............ 692
Gas station information..................844
Information............................................ 770
Refueling ....................................................113 Fuel door ..................................................... 113
Fuel filler door ........................................... 113
Fuel pump shut off system................. 692
Fuses .......................................................... 655
Garage door opener .......................... 574
Gas station information ..................... 844
Gauges .......................................................199
Glove box ................................................. 531
Glove box light ....................................... 531
Hands-free system for cellular
phones
*..................................................491
Hazard lights
Switch ...................................................... 684
Head restraints
Adjustment .............................................. 86
Headlights cleaner............................... 249
Headlights Adaptive front lighting
system................................................... 227
Discharge headlights
precautions ....................................... 682
Replacing light bulbs ......................... 671
Switch .......................................................223
Wattage ................................................. 769
Heaters Seat heaters ......................................... 557
Side mirror.............................................. 417
Heated steering ................................. 555
Height control Rear height control air
suspension ........................................ 320
F
G
H
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833
Alphabetical index
GX460_OM_OM60J63U_(U)
Personal lightsPersonal lights..................................... 525
Switch .......................................................527
Wattage ................................................. 769
Power steering Fluid .......................................................... 629
Power outlet ............................... 548, 550
Power windows.......................................105
Pre-Collision System...........................347
Radar cruise control ............................254
Radiator.....................................................626
Radio ........................................................... 421
RDS (Radio Date System).................423
Rear height control air suspension ..................................... 320
Rear seat Adjustment .................................................71
Folding down the second seatbacks ...................................... 73, 74
Folding down the third seats ...........76
Rear side marker lights
Replacing light bulbs ........................677
Wattage ................................................. 769
Rear step bumper ................................... 58
Rear turn signal lights Replacing light bulbs ........................677
Wattage ................................................. 769
Rear view mirror Compass ............................................... 582
Rear view monitor system ................ 285
Rear window defogger
*..................... 417
Rear window wiper and washer .....246 Replacing
Electronic key battery ......................652
Fuses........................................................ 655
Light bulbs ............................................ 670
Tires .......................................................... 726
Reporting safety defects for
U.S. owners ........................................... 810
Scuff lighting ...........................................525
Seat belts Adjusting the seat belt ........................90
Automatic Locking Retractor...........91
Child restraint system installation............................................ 155
Cleaning and maintaining the seat belts .................................... 602
Emergency Locking Retractor ..................................................91
How to wear your seat belt .............89
How your child should wear the seat belt .......................................... 92
Pre-collision seat belts .........................91
Pregnant women, proper seat belt use ......................... 92
Reminder light .....................................697
Seat belt extenders .............................. 93
Seat belt pretensioners ...................... 94
Seat heaters ............................................ 557
Seat position memory ............................ 82
Seat ventilator ........................................ 557
Seating capacity .................................... 369
R
S
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.
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