2010 Lexus IS250C Do-It-Yourself Maintenance / LEXUS 2010 IS350C/250C OWNERS MANUAL (OM53A20U)

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4-3. Do-it-yourself maintenance
4
Maintenance and care
14IG210 A
Ignition system, multiport fuel injec-
tion system/sequential multiport fuel
injection system
15EFI NO.210 AFuel system, exhaust system
16H-LP R LWR15 AHeadlight low beam (right)
17H-LP L LWR15 AHeadlight low beam (left)
18F/ P M P25 AFuel system
19EFI25 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, EFI NO. 2
20INJ20 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
21H-LP UPR15 AHeadlight high beams
22HORN10 AHorns
23WA S H E R20 AWindshield washer
24FR TAIL10 AParking lights, front side marker lights
25FR FOG15 AFront fog lights
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
■Driver’s side instrument panel
FuseAmpereCircuit
1FR P/SEAT LH30 APo w e r s e a t
2A/C7. 5 AAir conditioning system
3MIR HTR15 AOutside rear view mirror defoggers
4TV NO.110 ADisplay
5FUEL OPN10 AFuel filler door opener
6TV NO.27. 5 A
7TA I L10 ATail lights, license plate lights, parking
lights, side marker lights
8PA N E L7. 5 A
Air conditioning system, display,
clock, cigarette lighter, power steer-
ing, headlight cleaner, retractable
hardtop, ECT, ETCS, seat heaters and
ventilators, trunk opener, outside rear
view mirrors, shift lever light, traction
control, audio, instrument panel light
control
9RR FOG7. 5 A

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4-3. Do-it-yourself maintenance
4
Maintenance and care
10ECU-IG LH10 A
Cruise control, air conditioning sys-
tem, power steering, rain sensor, anti-
glare inside rear view mirror, shift lock
system, tire inflation pressure warning
system, vehicle stability control
11FR S/HTR LH15 ASeat heaters and ventilators, air condi-
tioning system
12FR DOOR LH20 APower windows, outside rear view
mirrors
13SECURITY7. 5 ASmart access system with push-button
start
14H-LP LVL7. 5 AAFS
15LH-IG10 A
Charging system, headlight cleaner,
rear window defogger, electric cool-
ing fans, emergency flashers, turn sig-
nal lights, back-up lights, stop lights,
mirror heaters, seat belt pretensioner,
intuitive parking assist, cruise control,
PTC heater, exhaust system, smart
access system with push-button start
16FR WIP30 AWindshield wipers
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
■Passenger’s side instrument panel
FuseAmpereCircuit
1FR P/SEAT RH30 APo w e r s e a t
2DOOR DL15 A
3OBD7. 5 AOn-board diagnosis system
4STOP SW7. 5 A
Stop lights, multipor t fuel injection sys-
tem/sequential multip ort fuel injection
system, VDIM, shift lock system
5TI & TE20 AElectric tilt and telescopic steering
column
6RAD NO.310 AAudio
7GAUGE7. 5 AMeter
8IGN10 A
SRS airbag system, steering lock sys-
tem, multiport fuel injection system/
sequential multiport fuel injection sys-
tem, stop lights, smart access system
with push-button start, occupant
detection system
9ACC7. 5 A
Audio, clock, air conditioning system,
navigation system, outside rear view
mirrors, smart access system with
push-button start, glove box light,
console box light

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4-3. Do-it-yourself maintenance
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Maintenance and care
10CIG15 ACigarette lighter
11PWR OUTLET15 APo w e r o u t l e t
12FR DOOR RH20 APower windows, outside rear view
mirrors
13AM27. 5 AStarting system
14RH-IG7. 5 A
Seat belt pretensioner, intuitive park-
ing assist, automatic transmission, seat
heater and ventilator
15FR S/HTR RH15 ASeat heaters and ventilators, air condi-
tioning system
16ECU-IG RH10 A
Power seats, headlights, front fog
lights, parking lights, license plate
lights, front side marker lights, wind-
shield washer, outside rear view mir-
rors, VDIM, air conditioning system,
pre-collision seat belt, electric tilt and
telescopic steering, power windows,
navigation system, vehicle stability
control, retractable hardtop, clock
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
■ Trunk
FuseAmpereCircuit
1DEFOG30 ARear window defogger
2ROOF RH30 ARetractable hardtop
3ROOF LH30 ARetractable hardtop
4LGG RH30 ARetractable hardtop
5LGG LH30 ARetractable hardtop
6LGG LCK RH30 ARetractable hardtop
7LGG LCK LH30 ARetractable hardtop
8P-T R AY M A I N30 ARetractable hardtop
9P-T R AY S I D E7. 5 ARetractable hardtop
10PSB30 APre-collision seat belt
■After a fuse is replaced
●If the lights do not turn on even afte r the fuse has been replaced, a bulb may
need replacement. ( P. 4 5 0 )
●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.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
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.

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4-3. Do-it-yourself maintenance
Headlight aim
■Removing the engine compartment cover
 P. 4 0 0
■ Vertical movement adjusting bolts
Adjustment bolt A
Adjustment bolt B
■ Before checking the headlight aim
Make sure the vehicle has a full tank of gas and the area around
the headlight is not deformed.
Park the vehicle on level ground.
Sit in the driver’s seat.
Bounce the vehicle several times.
STEP1
STEP2
STEP3
STEP4