2010 Lexus HS250h fuse

464
4-3. Do-it-yourself maintenance
11ECU-IG NO.110 A
Rear view mirror, electronically con-
trolled brake system, electric power
steering system, moon roof, rain-sens-
ing windshield wiper, emergency
flashers switch, air conditioning sys-
tem, electric head restraints, driver
monitor, steering switch, seat heaters/
ventilators, electric tilt & telescopic
steering wheel, rear sun shead. AFS
12S/ROOF30 AElectric moon roof
13DOOR RL25 ARear power window (left-side)
14DOOR RR25 ARear power window (right-side)
15SHADE RR10 ARear sun shade
16D FR DOOR25 ADriver’s side power window, outside
rear view mirror
17P FR DOOR25 APassenger’s side power window, out-
side rear view mirror
18TI & TE30 AElectric tilt & telescopic steering
wheel
19STOP10 AStop lights, electronically controlled
brake system
20A/C NO.210 ANo circuit
FuseAmpereCircuit

465
4-3. Do-it-yourself maintenance
4
Maintenance and care
21RR FOG7. 5 ANo circuit
22FUEL OPN7. 5 ATrunk opener switch, fuel filler door
opener switch
23OBD7. 5 AOn-board diagnosis
24PWR SEAT FL30 ADriver’s side power seat
25FR FOG15 AFront fog lights
26PWR SEAT FR30 APassenger’s side power seat
27PSB30 APre-collision seat belts system
28WELCAB30 ANo circuit
29DOOR NO.125 APower door lock system
30SEAT HTR FL10 ADriver’s side seat heater
31SEAT HTR FR10 APassenger’s side seat heater
32RAD NO.27. 5 A
Navigation system, audio system, air
conditioning system, HUD, remote
touch
33PWR OUTLET15 APo w e r o u t l e t
34ECU-ACC10 ARear view mirror, air conditioning sys-
tem, audio system, navigation system
FuseAmpereCircuit

466
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. 4 6 9 )
●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.
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 the fuses or fuse boxes.
■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, re sulting in death or serious injury.
NOTICE
■Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus
dealer as soon as possible.

530
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. 1 4 7 )
One of the following may be the cause of the problem:
● The electr
onic key may not be functioning properly.* (P. 5 3 3 )
● Ther
e may not be sufficient fuel in the vehicle’s tank. 
Refuel the vehicle.
● Ther
e may be a malfunction in the immobilizer system.* (P. 9 6 )
● Ther
e may be a malfunction in the P position control system.* 
( P. 1 5 0 , 502 )
● The hybrid s
ystem may be malfunc tioning due to an electrical
problem such as an open circuit or a blown fuse. However,
depending on the type of malfunc tion, an interim measure is avail-
able to start the hybrid system. ( P. 4 5 5)
*: It may not be possible to shift out of the P position.
■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. 5 3 6 )
● The 12-
volt battery terminal co nnections may be loose or cor-
roded.

536
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 fuse box
co
ver.
Push the tab in and lift the lid off.
Open the exclusive jump start -
ing terminal cover.
Slightly pull the tab to open the
cover.

538
5-2. Steps to take in an emergency
■Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
■To prevent 12-volt battery discharge
●Turn off the headlights and the audio system while the hybrid system is off.
●Turn off any unnecessary electrical components when the vehicle is running at a
low speed for an extended period, such as in heavy traffic.
■When the 12-volt battery is discharged
●The hybrid system may not start. (P. 4 3 4 )
●If the 12-volt battery is depleted with the shift position in P, it will not be possible
to shift out of P. In this case, the vehi cle cannot be towed without lifting both
front wheels because the front wheels are locked by the parking lock. 
(  P. 4 8 3 )
●When the 12-volt battery is reconnected, start the hybrid system, depress the
brake pedal, and confirm that it is poss ible to shift into each shift position.
Close the exclusive jump starting terminal cover and reinstall
the fuse box cover.
Once the hybrid system starts, have the vehicle inspected at your
L
exus dealer as soon as possible.

596
Alphabetical index
Engine oilCapacity ................................................ 550
Checking ............................................... 424
Preparing and checking 
before winter .................................... 244
Engine oil maintenance data............ 426
Engine switch............................................147
Enhanced VSC...................................... 225
EPS ............................................................. 225
EV drive mode switch .......................... 152
Event data recorder ............................490
Floor mat ................................................. 380
Fluid Brake........................................................554
Washer ................................................... 432
Fog lights Replacing light bulbs........................ 469
Switch ........................................................194
Wattage..................................................556
Foot light ...................................................360
Foot well lighting ...................................360
Front fog lights
Replacing light bulbs........................ 469
Switch ........................................................194
Wattage..................................................556
Front passenger occupant 
classification system ............................115
Front passenger's seat belt 
reminder light......................................495 Front seats
Adjustment ...............................................64
Driver’s seat po sition memory ...... 68
Front side marker light Replacing light bulbs ....................... 469
Wattage ................................................. 556
Front turn signal lights Replacing light bulbs ....................... 469
Switch ........................................................ 162
Wattage ................................................. 556
Fuel Capacity ................................................550
Fuel gauge .............................................. 162
Gas station information .................608
Information ........................................... 557
Refueling .................................................... 92
Type ......................................................... 557
Fuel door ..................................................... 92
Fuel filler door ........................................... 92
Fuses .......................................................... 455
Garage door opener .......................... 383
Gas station information .....................608
Gauges .......................................................162
Glove box ................................................ 364
Grocery bag hooks .............................. 381
F
G

599
Alphabetical index
Outer foot lightsOuter foot lights................................. 360
Wattage ................................................. 556
Outside rear view mirrors Adjusting and folding ......................... 83
Driving position memory ................. 68
Mirror position memory ................... 68
Outside temperature display ............ 169
Overhead console .............................. 370
Overheating, Engine ............................ 541
Overheating, Hybrid system............. 541
Parking brake .......................................... 163
Parking lights Replacing light bulbs ....................... 469
Switch ........................................................183
Wattage ................................................. 556
PCS.............................................................232
Personal lights Personal lights ....................................... 361
Switch ........................................................ 361
Wattage ................................................. 556
Power outlet ............................................374
Power switch............................................ 147
Power windows........................................ 86
Pre-collision system .............................232 Radar cruise control ............................205
Radiator ....................................................430
Radio ......................................................... 265
Radio data system ................................ 267
RDS ............................................................ 267
Rear side marker lights
Replacing light bulbs ........................ 479
Wattage ................................................. 556
Rear sunshade ....................................... 378
Rear turn signal lights Replacing light bulbs ........................470
Wattage ................................................. 556
Rear view mirror Compass................................................. 391
Rear window defogger ......................260
Replacing Electronic key battery ......................453
Fuses........................................................ 455
Light bulbs ............................................ 469
Tires ........................................................... 521
Reporting safety defects for 
U.S. owners ......................................... 586
Safety connect .......................................395
Scuff lighting ...........................................360
P
R
S