power steering Lexus IS250 2007 Basic Functions / LEXUS 2007 IS350/250 (OM53578U) User Guide

308
4-3. Do-it-yourself maintenance
Fuse layout and amperage ratings
■Engine compartment (type A)
FuseAmpereCircuit
1ABS NO.325AVDIM
2PWR HTR25A
3TURN-HAZ15AEmergency flashers, turn signals
4IG2 MAIN20AIG2, IGN, GAUGE
5RAD NO.230AAudio
6D/C CUT20ADOME, MPX-B
7RAD NO.130AAudio
8MPX-B10A
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
9DOME10AInterior lights, meter

309
4-3. Do-it-yourself maintenance
4
Maintenance and care
FuseAmpereCircuit
10E/G-B60 AFR CTRL-B, ETCS, ALT-S, steering
lock system, exhaust system
11DIESEL GLW80 A
12ABS150 AVSC, VDIM
13RH J/B-B30APower door lock system, smart access
system with push-button start
14MAIN30AHeadlight low beams
15STARTER30ASmart access system with push-button
start
16LH J/B-B30APower 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
22ABS230AVSC
23DEFOG50 ARear window defogger
24FA N 240 AElectric cooling fans
25FA N 140 AElectric cooling fans
26HEATER50 AAir conditioning system

313
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Driver’s side instrument panel
FuseAmpereCircuit
1FR P/SEAT LH30APo w e r s e a t
2A/C7. 5 AAir conditioning system
3MIR HTR15AOutside rear view mirror defoggers
4TV NO.110ADisplay
5FUEL OPEN10AFuel filler door opener
6TV NO.27. 5 A
7PSB30APre-collision seat belt
8S/ROOF25AElectric moon roof
9TA I L10ATail lights, license plate lights, parking
lights
10PA N E L7. 5 ASwitch illumination, air conditioning
system, display
11RR FOG7. 5 A
12ECU-IG LH10A
Cruise control, air conditioning sys-
tem, power steering, rain sensor, anti-
glare inside rear view mirror, shift lock
system, moon roof, tire inflation pres-
sure warning system
13FR S/HTR LH15ASeat heaters and ventilators

316
4-3. Do-it-yourself maintenance
FuseAmpereCircuit
13FR DOOR RH20APower windows, outside rear view
mirrors
14AM215ASmart access system with push-button
start
15RH-IG7. 5 A
Seat belts, Lexus parking assist-sen-
sor, automatic transmission, seat
heater and ventilator
16FR S/HTR RH15ASeat heaters and ventilators
17ECU-IG RH10A
Power seats, smart access system with
push-button start, AWD system, out-
side rear view mirrors, VDIM, VSC,
air conditioning system, pre-collision
seat belt, electric tilt and telescopic
steering, power windows, navigation
system
■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. 3 1 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 before the entire wiring harness is damaged.

5
When trouble arises
329
5-1. Essential information
■Emergency towing procedure
Release the parking brake.
Put the transmission in N.
Put the engine switch in ACC mode (engine off ) or IG-ON mode (engine
running).
CAUTION
■Caution while towing
●Use extreme caution when towing the vehicle.
Avoid sudden starts or erratic driving maneuvers which place excessive stress on
the emergency towing eyelets and the cables or chains.
●If the engine is not running, the power assist for the brakes and steering will not
function, making steering and braking more difficult.
NOTICE
■To prevent causing serious damage to the transmission
(for vehicles with an automatic transmission)
Never tow this vehicle from the front with the rear wheels on the ground.
This may cause serious damage to the transmission.
■When towing a vehicle without using a towing dolly
(for vehicles with a manual transmission)
The engine switch must not be OFF.
STEP1
STEP2
STEP3

5
When trouble arises
341
5-2. Steps to take in an emergency
Follow the correction procedures.
After taking the specified steps to correct 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 light
• Indicates 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 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.

403
6-1. Specifications
6
Vehicle specifications
Warning: The temperature grades for this tire are established for a tire that
is properly inflated and not overloaded.
Excessive speed, underinflation, or excessive loading, either separately or in
combination, can cause heat buildup and possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic transmis-
sion, power steering, power brakes, power windows,
power seats, radio and heater, to the extent that these
items are available as factory-installed equipment
(whether installed or not)
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil and
coolant, and if so equipped, air conditioning and
additional weight optional engine
Maximum inflation pres-
sureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight150 lb. (68 kg) times the number of occupants speci-
fied in the second column of Table 1
* that follows

418
Alphabetical index
Door courtesy lights
Door courtesy lights.........................209
Wattage.................................................. 394
Door pockets........................................... 218
Doors
Door glasses ........................................... 45
Door lock.................................................... 19
Side mirrors ............................................. 43
Driver's seat belt reminder light ...... 341
Driving
Correct posture .................................... 59
Procedures .............................................. 90
Driving position memory ......................28
Electric power steering (EPS) .......... 148
Electronic key
If your electronic key battery
is discharged .................................... 369
Emergency, in case of
If the engine will not start ............... 366
If the shift lever cannot be
shifted from P ................................... 367
If the vehicle has discharged
battery .................................................. 372
If the warning buzzer sounds ...... 339
If the warning light turns on .......... 339
If the warning message is
displayed ............................................ 344
If you have a flat tire .........................358
If you lose your keys.........................368
If you think something is
wrong ................................................... 335
If your electronic key battery
is discharged .................................... 369
If your vehicle becomes stuck......377If your vehicle needs to be
towed ................................................... 328
If your vehicle overheats.................375
Engine
Compartment ..................................... 269
Engine switch ......................................... 98
Hood ....................................................... 266
How to start the engine .................... 98
Identification number ........................ 381
If the engine will not start ............... 366
Overheating .........................................375
Engine compartment cover ............... 271
Engine coolant
Capacity ................................................ 385
Checking................................................276
Preparing and checking
before winter........................................ 161
Engine coolant temperature
gauge ...................................................... 109
Engine immobilizer system ................. 54
Engine oil
Capacity ................................................ 384
Checking................................................ 272
Preparing and checking
before winter........................................ 161
Engine oil maintenance data ........... 275
EPS (Electric power steering) ......... 148
Event data recorder ............................ 337
First-aid kit storage belt ..................... 238
Floor mat .................................................. 237
Fluid
Brake ........................................................278
Washer................................................... 282
E
F

422
Alphabetical index
Shift lever lighting .................................209
Shift lock system .................................... 367
Shopping bag hooks............................238
Side airbags................................................. 61
Side marker lights
Switch ........................................................ 122
Side mirror
Adjusting and folding ......................... 43
Driving position memory.................. 28
Smart access system with
push-button start
Entry function..............................................4
Starting the engine ............................... 98
Spare tire
Inflation pressure................................ 293
Spare tire................................................358
Spark plug ............................................... 385
Specifications ........................................ 380
Speedometer
Speed indicator ................................... 109
Speedometer........................................ 109
Steering wheel
Audio switches ................................... 207
Driving position memory.................. 28
Manual adjustment .............................. 40
Power adjustment .................................. 41
Storage feature....................................... 213
Stuck
If your vehicle becomes stuck......377
Sun visors .................................................. 219
Sunshade
Rear .......................................................... 233
Roof ............................................................. 49
Switch
ECT switch .............................................102
Engine switch.......................................... 98
ETCS switch.......................................... 105Fog light switch .................................... 125
Light switches.........................................122
Power door lock switch...................... 19
Power window switch ........................45
Satellite switches................................. 222
Transmission shift switches ............ 103
Window lock switch ............................45
Wipers and washer switch............. 126
Tachometer
Tacho indicator ....................................109
Tachometer............................................ 109
Tail lights
Switch .........................................................122
Theft deterrent system
Alarm.......................................................... 56
Engine immobilizer system ..............54
Theft prevention labels.......................... 58
Tire inflation pressure ......................... 293
Tire information
Glossary ................................................ 403
Size ........................................................... 400
Tire identification number ............. 399
Uniform tire quality grading........... 401
Tires
Chains......................................................... 161
Checking............................................... 283
If you have a flat tire ......................... 358
Inflation pressure ................................293
Inflation pressure sensor ............... 284
Information ........................................... 398
Replacing .............................................. 358
Rotating tires........................................ 283
Size ........................................................... 389
Snow tires.................................................. 161
Tools...........................................................358
T

423
Alphabetical index
Total load capacity................................. 160
Towing
Dinghy towing.............................166, 167
Emergency towing ........................... 328
Trailer towing.........................................165
TRAC (Traction control) .................... 148
Traction control (TRAC) .................... 148
Transmission shift switches..................103
Trip meter..................................................109
Trunk
Extending a space ............................ 235
Opener.......................................................23
Trunk light
Trunk light ................................................. 24
Wattage ................................................. 394
Turn signal lights
Replacing light bulbs ......................... 319
Switch ........................................................ 107
Wattage ................................................. 394
Vanity lights
Vanity lights .......................................... 220
Wattage ................................................. 394
Vanity mirrors........................................... 220
VDIM (Vehicle dynamics
integrated management)................. 148
Vehicle dynamics integrated
management (VDIM) ....................... 148
Vehicle identification number ..........381
Vehicle stability control (VSC) ........ 148
Ventilators............................................... 230
VSC (Vehicle stability control) ........ 148Warning buzzers
Brake system........................................339
Open door ............................................ 341
Seat belt reminder ............................ 340
Warning lights
Anti-lock brake system (ABS) ... 340
Brake assist system .......................... 340
Brake system........................................339
Charging system............................... 340
Electric power steering
warning light .................................... 340
Electronic engine control
system ................................................. 340
Low fuel level ........................................ 341
Low tire pressure warning
light ......................................................... 341
Master warning light.......................... 341
Open door ............................................. 341
Pre-collision system......................... 340
Pretensioners ...................................... 340
Seat belt reminder light.................... 341
SRS airbags.......................................... 340
Warning messages
AWD system .......................................345
Dynamic radar
cruise control....................... 345, 349
Engine oil level ....................................349
Engine oil maintenance ..................349
Engine oil pressure ...........................344
Hill-start assist control .................... 348
Hood ........................................................349
Lexus parking assist
sensor ...................................... 345, 349
Moon roof .............................................349
Open door ............................................349
Parking brake ......................................349
Pre-collision system............. 345, 349
V
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