ignition Lexus IS250C 2010 Service Manual

408
4-3. Do-it-yourself maintenance
10_IS250C/350C_U■
How to initialize the tire pressure warning system
To initialize the system, use the satellite switch. ( →P. 3 4 9 )
Park the vehicle in safe place and turn the “ENGINE START
STOP” switch OFF.
While the vehicle is moving, initialization is not performed.
Adjust the tire inflation pressure to the specified cold tire inflation
pressure level. ( →P. 5 3 6 )
Make sure to adjust the tire pressure to the specified cold tire inflation
pressure level. The tire pressure warning system will operate based on
this pressure level.
Turn the “ENGINE START STOP” switch to IGNITION ON
mode.
The tire inflation pressure initial-
ization setting display
Continue to press “<” or “>” until
the initialization setting display
appears.
Recording tire inflation pressure
settings
Push and hold the “ON/OFF” but-
ton until the tire pressure warning
light blinks slowly three times.
Wait for a few minutes with the IGNITION ON mode, and then
turn the “ENGINE START STOP” switch OFF.
STEP1
STEP2
STEP3
STEP4
STEP5

435
4-3. Do-it-yourself maintenance
4
Maintenance and care
10_IS250C/350C_U
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

468
5-2. Steps to take in an emergency
10_IS250C/350C_U
■The tire pressure warning light may turn on due to natural causes
The tire pressure warning light may turn on due to natural causes such as natural air
leaks or tire inflation pressure changes caused by temperature. In this case, adjust-
ing the tire inflation pressure will turn off the warning light (after a few minutes).
■When a tires is replaced with a spare tire (vehicles with a spare tire)
The compact spare tire is not equipped with the tire pressure warning valve and
transmitter. If a tire goes flat, the tire pressure warning light will not turn off even
though the flat tire is replaced with the spare tire. Replace the spare tire with the
repaired tire and adjust the proper tire inflation pressure. The tire pressure warning
light will turn off after a few minutes.
■If the tire pressure warning system is inoperative
The tire pressure warning system will be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
●If tires not equipped with tire pressure warning valves and transmitters are used
●If the ID code on the tire pressure warning valves and transmitters is not regis-
tered in the tire pressure warning computer
●If a different set of tires has been selected using the satellite switch.
●If the tire inflation pressure is 73 psi (500 kPa, 5.1 kgf/cm2 or bar) or higher
The tire pressure warning system may be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
●If electronic devices or facilities using similar radio wave frequencies are nearby
●If a radio set at similar frequencies is in use in the vehicle
●If there is a lot of snow or ice on the vehicle, in particular around the wheels or
wheel housings
●If non-genuine Lexus wheels are used (Even if you use Lexus wheels, the tire
pressure warning system may not work properly with some types of tires.)
●If tire chains are used
■If the tire pressure warning light comes on after blinking for 1 minute frequently
If the tire pressure warning light comes on after blinking for 1 minute frequently
when the “ENGINE START STOP” switch is turned to IGNITION ON mode, have
it checked by your Lexus dealer.

5
When trouble arises
507
5-2. Steps to take in an emergency
10_IS250C/350C_U
■Avoiding a discharged battery
●Turn off the headlights and the audio system while the engine is off.
●Turn off any unnecessary electrical components when the vehicle is running at a
low speed for an extended period, such as in heavy traffic, etc.
CAUTION
■Avoiding battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flammable
gas that may be emitted from the battery.
●Make sure the jumper cable is connected to the correct terminal and that it is not
unintentionally in contact with any part other than the intended terminal.
●Do not allow the jumper cables to come into contact with the “+” and “-” termi-
nals.
●Do not allow open flame or use matches, cigarette lighters or smoke near the
battery.
Maintain the engine speed of the second vehicle and turn the
“ENGINE START STOP” switch to IGNITION ON mode,
then start the vehicle’s engine.
Once the vehicle’s engine has started, remove the jumper
cables in the exact reverse order in which they were con-
nected.
Once the engine starts, have the vehicle checked at your Lexus dealer
as soon as possible.STEP5
STEP6

532
6-1. Specifications
10_IS250C/350C_U
Ignition system
Electrical system
Spark plug
Make
GapDENSO FK20HBR11
0.043 in. (1.1 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust gap when tuning engine.
Battery
Open voltage* at
68 °F (20 °C):12.6  12.8 V Fully charged
12.2 
12.4 V Half charged
11.8 
12.0 V Discharged
(*: Voltage checked 20 minutes after
the engine and all the lights are turned
off)
Charging rates5 A max.

574
Alphabetical index
10_IS250C/350C_U
Cruise controlCruise control ...................................... 183
Dynamic radar crui se control .......187
Cup holder ..............................................343
Customizable features .......................557
Daytime running light system ............174
Defogger
Rear window........................................ 238
Side mirror ............................................ 238
Dimension ................................................526
Dinghy towing .............................225, 226
Display Dynamic radar crui se control .......187
Satellite switch mode ....................... 349
Trip information ....................................169
Warning message..............................472
Do-it-yourself maintenance ............ 386
Door courtesy lights Door courtesy lights.........................338
Wattage....................................................541
Doors
Door lock................................ 28, 40, 43
Door windows ....................................... 78
Side mirrors ............................................. 75
Driver's seat belt reminder light .....465
Driving Correct posture .................................... 98
Procedures ............................................. 132
Driving position memory ...................... 56 Electric power steering...................... 204
Electronic key
If the electronic key does not operate properly..............................501
Emergency, in case of If the engine will not start ................497
If the retractable hardtop does not close ................................... 514
If the shift lever cannot be shifted from P................................... 499
If the vehicle has a discharged battery .................................................506
If the warning buzzer sounds...... 463
If the warning light turns on.......... 463
If the warning message is displayed ............................................. 472
If you have a flat tire ........................ 486
If you lose your keys ........................500
If you think something is wrong .................................................. 459
If the electronic key does not operate properly..............................501
If your vehicle becomes stuck ...... 512
If your vehicle needs to be towed ................................................... 453
If your vehicle overheats................509
Emergency flashers Switch...................................................... 452
Engine Compartment ......................................392
Engine switch ........................................ 142
Hood ....................................................... 389
How to start the engine ................... 142
Identification number .......................527
If the engine will not start ................497
Ignition switch ....................................... 142
Overheating ........................................509
D
E

576
Alphabetical index
10_IS250C/350C_U
Hands-free system for mobile phone ...............................307
Hazard lights Switch ...................................................... 452
Head restraints Adjusting .................................................. 62
Headlight aim .........................................443
Headlight cleaner .................................. 182
Headlights Discharge headlight
precautions .......................................450
Replacing light bulbs........................ 444
Switch ........................................................ 173
Wattage....................................................541
Heaters Seat heaters..........................................355
Side mirror ............................................ 238
Hill-start assist control ......................... 210
Hood ......................................................... 389
Hooks
Cargo ......................................................359
Shopping bag......................................359
Horn ............................................................ 158
I/M test ..................................................... 385
Identification Engine ..................................................... 527
Vehicle .................................................... 527
Ignition switch.......................................... 142
Illuminated entry system ................... 338
Indicator lights......................................... 165
Initialization Items to initialize ................................. 562 Inside rear view mirror ...........................74
Interior lights
Interior lights ........................................ 338
Switch...................................................... 339
Wattage ................................................... 541
Jack Positioning a floor jack ................... 390
Vehicle-equipped jack................... 486
Jack handle ............................................. 486
Keyless entry ............................................. 40
Keys Electronic key ......................................... 24
Engine switch ........................................ 142
If you lose your keys ........................500
If the electronic key does not operate properly..............................501
Key number.............................................. 24
Keyless entry........................................... 40
Keys.............................................................. 24
Mechanical key ......................................25
Wireless remote control key.......... 40H
I
J
K

579
Alphabetical index
10_IS250C/350C_U
Shift leverAutomatic transmission.................... 147
If the shift lever cannot be shifted from P ................................... 499
Manual transmission ..........................154
Shift lever light ....................................... 338
Shift lock system ................................... 499
Shopping bag hooks ........................... 359
Side airbags ............................................. 100
Side marker lights
Switch ........................................................ 173
Side mirror
Adjusting and folding ..........................75
Mirror position memory ................... 56
Smart access system with push-button start
Entry function ......................................... 28
Starting the engine.............................. 142
Spare tire Inflation pressure ................................. 416
Storage location.................................486
Spark plug ............................................... 532
Specifications......................................... 526
Speech command switch..................... 311
Speedometer Speed indicator ....................................159
Speedometer ........................................159 Steering wheel
Adjustment ............................................... 72
Audio switches ................................... 286
Steering wheel position
memory ..................................................56
Storage feature......................................340
Stuck If your vehicle becomes stuck ...... 512
Sun visors .................................................346
Switch ECT switch............................................. 148
Emergency flasher switch .............452
Engine switch .........................................142
ETCS switch .......................................... 155
Fog light switch .....................................176
Hazard light switch ...........................452
Ignition switch ........................................142
Light switches ........................................173
Power door lock switch .................... 43
Power window switch ........................ 78
Roof switch................................................ 81
Satellite switches.................................349
Transmission shift switches ........................................149, 151
Window lock switch............................ 78
Wipers and washer switch ............. 177