2011 Lexus IS250 maintenance

434
4-3. Do-it-yourself maintenance
IS350/250_U■
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, multiport fuel injection sys-
tem/sequential multiport fuel injection
system, VDIM, shift lock system, high
mounted stop light
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, Lexus Enform

435
4-3. Do-it-yourself maintenance
4
Maintenance and care
IS350/250_U
9ACC7. 5 A
Lexus Enform, clock, air conditioning
system, audio, navigation system, out-
side rear view mirrors, Lexus parking
assist monitor, glove box light, console
box light, multiplex communication
system, display, smart access system
with push-button start
10CIG15 ACigarette lighter
11PWR OUTLET15 APo w e r o u t l e t
12RR DOOR RH20 APo w e r w i n d o w s
13FR DOOR RH20 A
Po w e r w i n d o w s , o u t s i d e r e a r v i e w
mirrors, multiplex communication sys-
tem
14AM27. 5 AStarting system
15RH-IG7. 5 A
Seat belts, intuitive parking assist,
automatic transmission, seat heater
and ventilator, windshield wiper de-
icer
16FR S/HTR RH15 ASeat heaters and ventilators
17ECU-IG RH10 A
Power seats, smart access system with
push-button start, AWD system, out-
side rear view mirrors, VDIM, air con-
ditioning system, electric tilt and
telescopic steering, power windows,
navigation system, multiplex commu-
nication system
FuseAmpereCircuit

436
4-3. Do-it-yourself maintenance
IS350/250_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. 4 3 9 )
●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, protecting the wiring harness from damage.
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 the fuses or the fuse box.
NOTICE
■Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus
dealer.

437
4-3. Do-it-yourself maintenance
4
Maintenance and care
IS350/250_U
Headlight aim
■Removing the engine compartment cover
→ P. 388
■ 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

438
4-3. Do-it-yourself maintenance
IS350/250_U
■Adjusting the headlight aim
Turn bolt A in either direction
using a Phillips-head screw-
driver.
Remember the turning direction
and the number of turns.
Turn bolt B the same number of
turns and in the same direction
as step 1 using a Phillips-head
screwdriver.
If the headlight cannot be
adjusted using this procedure,
take the vehicle to your Lexus
dealer to adjust the headlight
aim.
STEP1
STEP2

439
4-3. Do-it-yourself maintenance
4
Maintenance and care
IS350/250_U
Light bulbs
You may replace the following bulbs yourself. For more information about
replacing other light bulbs, contact your Lexus dealer.
■Preparing a replacement light bulb
Check the wattage of the light bulb being replaced. ( →P. 5 2 4 )
■ Removing the engine compartment cover
→ P. 388
■ Front bulb locations
Parking lights (vehicles with
halogen headlights)
Headlight high beam and daytimerunning lights (vehicles with halogen headlights)
Headlight high beam
(vehicles with discharge
headlights)

440
4-3. Do-it-yourself maintenance
IS350/250_U
■Rear bulb locations
Rear turn signal light
Back-up light

441
4-3. Do-it-yourself maintenance
4
Maintenance and care
IS350/250_U
Replacing light bulbs■ Headlight high beams and daytime ru nning lights (vehicles with halo-
gen headlights)
Release the lock and remove the
cover.
Turn the bulb base counterclock-
wise.
Unplug the connector while
depressing the lock release.
STEP1
STEP2
STEP3