2008 Lexus IS250 ABS

327
4-3. Do-it-yourself maintenance
4
Maintenance and care
Checking and replacing fuses
If any of the electrical components do not operate, a fuse may have blown.
If this happens, check and replace the fuses as necessary.
Turn the “ENGINE START STOP” switch OFF.
Remove the engine compartment cover. ( P. 2 9 4 )
Open the fuse box cover.
Engine compartment (type A)
Push the tabs in and lift the lid
off.
Engine compartment (type B) Push the tabs in and lift the lid
off.STEP1
STEP2
STEP3

330
4-3. Do-it-yourself maintenance
Removing the front controller (engine compartment: type B)Lift the lid off while pushing the
tabs on either side.
Type DNormal fuse
Blown fuse
Contact your Lexus dealer.

331
4-3. Do-it-yourself maintenance
4
Maintenance and care
Fuse layout and amperage ratings■ Engine compartment (type A)
FuseAmpereCircuit
1ABS NO.325 AVDIM
2PWR HTR25 A
3TURN-HAZ15 AEmergency flashers, turn signals
4IG2 MAIN20 AIG2, IGN, GAUGE
5RAD NO.230 AAudio
6D/C CUT20 ADOME, MPX-B
7RAD NO.130 AAudio
8MPX-B10 A
Headlights, front fog lights, parking
lights, license plate lights, windshield
washer, horn, power door lock system,
power windows, power seats, electric
tilt and telescopic steering column,
meter, smart access system with push-
button start, outside rear view mirrors,
air conditioning system, security sys-
tem
9DOME10 AInterior lights, meter

332
4-3. Do-it-yourself maintenance
FuseAmpereCircuit
10E/G-B60 AFR CTRL-B, ETCS, ALT-S, steering
lock system, exhaust system
11DIESEL GLW80 A
12ABS150 AVSC, VDIM
13RH J/B-B30 APower door lock system, smart access
system with push-button start
14MAIN30 AHeadlight low beams
15STARTER30 ASmart access system with push-button
start
16LH J/B-B30 APower door lock system, SECURITY
17P/I-B60 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
18EPS80 APower steering
19ALT150 A
LH J/B-AM, E/G-AM, GLW PLG2,
H E AT E R , FA N 1 , FA N 2 , D E F O G,
ABS2, RH J/B-AM, GLW PLG1,
LH J/B-B, RH J/B-B
20GLW PLG150 APTC heater
21RH J/B-AM80 A
OBD, STOP SW, TI&TE, FR P/SEAT
RH, RAD NO.3, ECU-IG RH,
RH-IG, FR S/HTR RH, ACC, CIG,
PWR OUTLET
22ABS230 AVSC
23DEFOG50 ARear window defogger
24FA N 240 AElectric cooling fans
25FA N 140 AElectric cooling fans
26HEATER50 AAir conditioning system

362
5-2. Steps to take in an emergency
Follow the correction procedures.After taking the specified steps to co rrect the suspected problem, check
that the warning light turns off.
Warning lightWarning light/Details
(U.S.A.)

(Canada)
“ABS” warning light
Indicates a malfunction in:
•The ABS;
• The brake assist system.
Electric power steering system warning lightIndicates a malfunction in the EPS (Electric Power Steering)
system.
Pre-collision system warning light (if equipped)Indicates a malfunction in the pre-collision system.
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)
*1
Indicates that a door or a
trunk is not fully closed.
Check that all doors and the
trunk are closed.
Low fuel level warning lightRemaining fuel
(Approximately 2.9 gal. [11 L,
2.4 Imp.gal.] or less)
Refuel the vehicle.
(On the instru-ment cluster)
Driver’s seat belt reminder
light (warning buzzer)
*2
Warns the driver to fasten
his/her seat belt.Fasten the seat belt.

5
When trouble arises
389
5-2. Steps to take in an emergency
CAUTION
■When using the compact spare tire
●Remember that your compact spare tire is specifically designed for use with your
vehicle. Do not use your compact spare tire on another vehicle.
●Do not use two compact spare tires simultaneously.
●Replace the compact spare tire with a standard tire as soon as possible.
●Avoid sudden acceleration, deceleration and braking, as well as sharp cornering.
■Speed limit when using the compact spare tire
Do not drive at speeds in excess of 50 mph (80 km/h) when a compact spare tire is
installed on the vehicle.
The compact spare tire is not designed for driving at high speeds. Failing to observe
this precaution may lead to an accident causing death or serious injury.
■When the compact spare tire attached
The vehicle speed may not be correctly detected, and the following systems may
not operate correctly:
●ABS & brake assist
●VSC
●TRAC
●Navigation system (if equipped)
Also, not only can the following system not be utilized fully, it may actually negatively
effect the drive-train components:
●AW D s y s t e m

448
Abbreviation list
Abbreviation/Acronym list
ABBREVIATIONSMEANING
ABSAnti-Lock Brake System
AFSAdaptive Front-lighting System
AI-SHIFTArtificial Intelligence Shift
ALRAutomatic Locking Retractor
CALCalibration
CRSChild Restraint System
DISPDisplay
ECTElectronic Controlled Transmission
ECUElectronic Control Unit
EDREvent data recorder
ELREmergency Locking Retractor
EPSElectric Power Steering
ETCSElectronic Throttle Control System
GAWRGross Axle Weight Rating
I/MEmission inspection and maintenance
INTIntermittent
MMTMethylcyclopentadienyl Manganese Tricarbonyl
M + SMud and Snow
MTBEMethyl Tertiary Butyl Ether
OBDOn Board Diagnostics
PCSPre-Collision System
SRSSupplemental Restraint System
TINTire Identification Number
TPMSTire Pressure Warning System
TRACTraction Control

450
Alphabetical index
Alphabetical index
A/C ............................................................. 192
ABS.............................................................. 170
AFS .............................................................. 144
Adaptive front lighting system ......... 144
Air conditioning filter .......................... 322
Air conditioning systemAir conditioning filter ....................... 322
Automatic air conditioning system .................................................... 192
Airbags Airbag operating conditions.............81
Airbag precautions for your child.......................................................... 85
Airbag warning light ..........................361
Curtain shield airbag operating
conditions.............................................. 82
Curtain shield airbag precautions .......................................... 85
Front passenger occupant classification system......................... 90
General airbag precautions ........... 85
Locations of airbags............................ 79
Modification and disposal of airbags .................................................... 89
Proper driving po sture ............. 77, 85
Side airbag operating conditions.............................................. 82
Side airbag precautions .................... 85
SRS airbags ............................................. 79 Alarm .............................................................74
Antenna ....................................................208
Anti-lock brake system ........................170
Armrest .................................................... 255
Ashtrays.................................................... 248
Audio input.............................................. 228
Audio system
Antenna.................................................. 208
Audio input ........................................... 228
AUX adapter ...................................... 228
CD player/changer ............................. 211
MP3/WMA disc..................................217
Optimal use ..........................................225
Portable music player ..................... 228
Radio ....................................................... 204
Steering wheel audio switch.........229
Automatic air conditioning system ......................................................192
Automatic headlight leveling system ......................................................145
Automatic light control system.........143
Automatic transmission Automatic transmission ....................122
If the shift lever cannot be shifted from P....................................392
S mode ..................................................... 124
AUX adapter ......................................... 228A