ABS Lexus IS250 2010 User Guide

408
4-3. Do-it-yourself maintenance
IS350/250_U
Radiator and condenserCheck the radiator and condenser and clear any foreign objects.
If either of the above parts are extremely dirty or you are not sure of their
condition, have your vehicle checked by your Lexus dealer.
Brake fluid■ Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN”
lines on the tank.
Make sure to check the fluid type and prepare the necessary items.
■ Adding fluid
CAUTION
■When the engine is hot
Do not touch the radiator or condenser, as they may be hot and you may be burned.
Fluid typeFMVSS No.116 DOT 3 or SAE J1703 brake fluid
ItemsClean funnel
■Brake fluid can absorb moisture from the air
Excess moisture in the fluid can cause a dangerous loss of braking efficiency. Use
only newly opened brake fluid.

436
4-3. Do-it-yourself maintenance
IS350/250_U
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.
Engine compartment (type B fuse box): Remove the engine
compartment cover. ( →P. 4 0 2 )
Open the fuse box cover.
Engine compartment (type A fuse box)
Push the tabs in and lift the lid
off.
Engine compartment (type B fuse box) Push the tabs in and lift the lid
off.STEP1
STEP2
STEP3

439
4-3. Do-it-yourself maintenance
4
Maintenance and care
IS350/250_U
Removing the front controller (engine compartment: type B fuse box)
Lift the lid off while pushing the
tabs on either side.
Ty p e D Normal fuse
Blown fuse
Contact your Lexus dealer.

441
4-3. Do-it-yourself maintenance
4
Maintenance and care
IS350/250_U
FuseAmpereCircuit
10E/G-B60 AFR CTRL-B, ETCS, ALT-S, steering
lock system, exhaust system
11DIESEL GLW80 A
12ABS150 AVDIM
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,
HEATER, FAN1, FAN2, DEFOG,
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 AVDIM
23DEFOG50 ARear window defogger
24FA N 240 AElectric cooling fans
25FA N 140 AElectric cooling fans
26HEATER50 AAir conditioning system

5
When trouble arises
473
5-2. Steps to take in an emergency
IS350/250_U
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 the
trunk is not fully closed.
Check that all doors and the
trunk are closed.
Low fuel level warning light
Remaining 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
499
5-2. Steps to take in an emergency
IS350/250_U
CAUTION
■When using the 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 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 spare tire is attached
The vehicle speed may not be correctly detected, and the following systems may
not operate correctly:
●ABS & brake assist
●VSC
●TRAC
●EPS
●VDIM
●Navigation system (if equipped)
●Intuitive parking assist (if equipped)
●Dynamic radar cruise control (if equipped)
●Cruise control (if equipped)
●PCS (if equipped)
●AFS (if equipped)
Also, not only can the following system not be utilized fully, it may actually negatively
effect the drive-train components:
●AWD system (if equipped)

562
IS350/250_U
Abbreviation list
Abbreviation/Acronym list
ABBREVIATIONSMEANING
ABSAnti-lock Brake System
AFSAdaptive Front-lighting System
AI-SHIFTArtificial Intelligence Shift
ALRAutomatic Locking Retractor
AW DAll Wheel Drive
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
LATCHLower Anchors and Tethers for Children
LEDLight Emitting Diode
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

564
IS350/250_U
Alphabetical index
Alphabetical index
A/C ............................................................220
ABS.............................................................. 196
AFS .............................................................. 166
Adaptive front lighting system ......... 166
Air conditioning filter ........................... 431
Air conditioning systemAir conditioning filter ......................... 431
Automatic air conditioning system .................................................. 220
Airbags
Airbag operating conditions........... 96
Airbag precautions for your child.......................................................... 99
Airbag warning light .........................472
Curtain shield airbag operating conditions.............................................. 96
Curtain shield airbag precautions .......................................... 99
Front passenger occupant classification system....................... 104
General airbag precautions ........... 99
Locations of airbags............................ 93
Modification and disposal of airbags .................................................. 103
Proper driving posture ............... 91, 99
Side airbag operating conditions.............................................. 96
Side airbag precautions .................... 99
SRS airbags ............................................. 93
Alarm ........................................................... 88
Antenna ....................................................238
Anti-lock brake system ....................... 196
Armrest .....................................................354
Ashtrays ....................................................345
Audio input .............................................. 275 Audio system
Antenna.................................................. 238
AUX adapter .......................................275
Bluetooth
® audio ............................. 280
CD player/changer ........................... 241
iPod
®...................................................... 256
MP3/WMA disc............................... 248
Optimal use .......................................... 273
Portable music player ......................275
Radio ........................................................233
Steering wheel audio switch......... 277
USB memory .......................................264
Automatic air conditioning system .................................................... 220
Automatic headlight leveling system ...................................................... 167
Automatic light control system.........165
Automatic transmission Automatic transmission ................... 139
If the shift lever cannot be shifted from P................................... 503
S mode ..................................................... 142
AUX adapter ......................................... 275
Back-up lights Wattage ................................................. 533
Battery Checking................................................. 410
If the vehicle has a discharged battery .................................................509
Preparing and checking before winter...................................... 210
Bottle holders .........................................338
Bluetooth
® audio .................................280
Bluetooth® phone ............................... 298
A
B

575
What to do if...
IS350/250_U
A warning light or indicator
light comes onP. 4 7 1If a warning light turns on or a warning
buzzer sounds...
■Warning lights
or or
P. 4 7 1P. 4 7 2
P. 4 7 3
or
P. 4 7 2P. 4 7 3
P. 4 7 3P. 4 7 3
P. 4 7 2P. 4 7 2
P. 4 7 3P. 4 7 2
P. 4 7 2P. 4 7 3
Brake system warning lightMalfunction indicator lamp
ABS warning lightDriver’s seat belt reminder
light
Front passenger’s seat belt
reminder light
Low fuel level warning lightMaster warning light
SRS warning lightElectric power steering warning
light
Open door warning lightPre-collision system warn-
ing light
Charging system warning
lightTire pressure warning light
A warning message is dis-
playedP. 4 8 0If a warning message is displayed