2010 Lexus IS250 immobilizer

TABLE OF CONTENTSIndex
IS350/250_U
2
1-1. Key informationKeys ...................................................... 24
1-2. Opening, closing and locking the doors and trunk
Smart access system with push-button start .......................... 28
Wireless remote control .............. 40
Doors.................................................... 43
Trunk..................................................... 47
1-3. Adjustable components (seats, mirrors,
steering wheel)
Front seats ........................................... 51
Driving position memory (driver’s seat) ................................. 53
Seat position memory (front passenger’s seat) ............. 57
Head restraints................................. 59
Seat belts ............................................ 62
Steering wheel (manually adjustable type)............................. 69
Steering wheel (power-adjustable type)............ 70
Anti-glare inside rear view mirror ................................................ 72
Outside rear view mirrors ........... 73 1-4. Opening and closing the
windows and moon roof
Power windows................................ 76
Moon roof .......................................... 79
1-5. Refueling Opening the fuel tank cap........... 83
1-6. Theft deterrent system Engine immobilizer system ......... 86
Alarm................................................... 88
Theft prevention labels (U.S.A.) ............................................. 90
1-7. Safety information Correct driving posture ................ 91
SRS airbags ....................................... 93
Front passenger occupant classification system .................. 104
Child restraint systems ............... 109
Installing child restraints ............... 113
1Before driving

Before driving1
23
IS350/250_U
1-1. Key informationKeys ............................................... 24
1-2. Opening, closing and locking the doors and
trunk
Smart access system with push-button start ................... 28
Wireless remote control ........ 40
Doors ............................................ 43
Trunk ............................................. 47
1-3. Adjustable components (seats, mirrors,
steering wheel)
Front seats .................................... 51
Driving position memory (driver’s seat) ........................... 53
Seat position memory (front passenger’s seat) ........ 57
Head restraints .......................... 59
Seat belts ..................................... 62
Steering wheel (manually adjustable type) ...................... 69
Steering wheel (power-adjustable type) ....... 70 Anti-glare inside rear view
mirror......................................... 72
Outside rear view mirrors...... 73
1-4. Opening and closing the windows and moon roof
Power windows ........................... 76
Moon roof ................................... 79
1-5. Refueling Opening the fuel tank cap ..... 83
1-6. Theft deterrent system Engine immobilizer system ........................................ 86
Alarm............................................ 88
Theft prevention labels (U.S.A.)...................................... 90
1-7. Safety information Correct driving posture .......... 91
SRS airbags ................................ 93
Front passenger occupant classification system............ 104
Child restraint systems ......... 109
Installing child restraints........ 113

86
IS350/250_U
1-6. Theft deterrent system
Engine immobilizer system
The vehicle's keys have built-in transponder chips that prevent the engine
from starting if the key has not been previously registered in the vehicle's
on-board computer.
Never leave the keys inside the vehicle when you leave the vehicle.
The indicator light flashes after
the “ENGINE START STOP”
switch has been turned OFF to
indicate that the system is oper-
ating.
The indicator light stops flashing
after the “ENGINE START
STOP” switch has been turned
to ACCESSORY or IGNITION
ON mode to indicate that the
system has been canceled.

87
1-6. Theft deterrent system
1
Before driving
IS350/250_U
■System maintenance
The vehicle has a maintenance-free type of engine immobilizer system.
■Conditions that may cause the system to malfunction
●If the grip portion of the key is in contact with a metallic object
●If the key is in close proximity to or touching a key to the security system (key
with a built-in transponder chip) of another vehicle
■Certifications for the engine immobilizer system For vehicles sold in the U.S.A.
FCC ID: NI4TMIMB-1
This device complies with Part 15 of the FCC Rules. Operation is subject to the fol-
lowing two conditions: (1) this device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation. For vehicles sold in Canada
Operation is subject to the following two conditions: (1) this device may not cause
interference, and (2) this device must accept any interference, including interfer-
ence that may cause undesired operation of the device.
CAUTION
Changes or modifications not expressly approved by the party responsible for com-
pliance could void the user’s authority to operate the equipment.
NOTICE
■To ensure the system correctly
Do not modify and remove the system. If modified or removed, the proper opera-
tion of the system cannot be guaranteed.

137
2-1. Driving procedures
2
When driving
IS350/250_U
■If the engine does not start
The engine immobilizer system may not have been deactivated. (→P. 8 6 )
■When the steering lock cannot be released
■When the “ENGINE START STOP” switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by your Lexus
dealer immediately.
■Auto power off function
If the vehicle is left in ACCESSORY mode for more than an hour with the shift lever
in P (vehicles with an automatic transmission), the “ENGINE START STOP” switch
will automatically turn OFF.
■Electronic key battery depletion
→P. 3 4
■When the electronic key battery is fully discharged
→P. 4 3 4
■Conditions affecting operation
→P. 3 2
■Note for the entry function
→P. 3 5 The “ENGINE START STOP” switch indica-
tor will flash in green and a message will be
shown on the multi-information display. Press
the “ENGINE START STOP” switch again
while turning the steering wheel left and right.

5
When trouble arises
501
5-2. Steps to take in an emergency
IS350/250_U
If the engine will not start
If the engine will not start even though correct starting procedures are
being followed (
→P. 134), consider each of the following points.
■The engine will not start even when the starter motor operates
normally.
One of the following may be the cause of the problem.
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
● The engine may be flooded.
Try to restart the engine once more following correct starting
procedures. ( →P. 1 3 4 )
● There may be a malfunction in the engine immobilizer system.
(→ P. 8 6 )
■ The starter motor turns over slowly, the interior lights and head-
lights are dim, or the horn does not sound or sounds at a low vol-
ume.
One of the following may be the cause of the problem.
● The battery may be discharged. ( →P. 509)
● The battery terminal connections may be loose or corroded.
■ The starter motor does not turn ov er, the interior lights and head-
lights do not turn on, or the horn does not sound.
One of the following may be the cause of the problem.
● One or both of the battery terminals may be disconnected.
● The battery may be discharged. ( →P. 509)
● There may be a malfunction in the steering lock system.
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.

567
Alphabetical index
IS350/250_U
Engine compartment cover............. 402
Engine coolantCapacity................................................. 524
Checking ............................................... 406
Preparing and checking before winter ...................................... 210
Engine coolant temperature gauge ........................................................ 151
Engine immobilizer system ................. 86
Engine oil Capacity................................................. 522
Checking ............................................... 403
Preparing and checking before winter ...................................... 210
Engine oil maintenance data ........... 405
EPS............................................................... 196
Event data recorder.............................469
First-aid kit storage belt..................... 360
Floor mat.................................................. 359
Fluid Brake .......................................................408
Washer ..................................................... 413
Fog lights
Switch ........................................................168
Wattage ................................................. 533
Footwell lights........................................ 329
Front fog lights Switch ........................................................168
Wattage ................................................. 533 Front passenger occupant
classification system .......................... 104
Front passenger's seat belt reminder light...................................... 473
Front seats Adjustment .................................................51
Driving position memory ..................53
Seat position memory ........................ 57
Front turn signal lights Switch.........................................................147
Wattage ................................................. 533
Fuel
Capacity .................................................. 521
Fuel gauge................................................ 151
Fuel pump shut off system............ 468
Gas station information ..................576
Information ............................................534
Refueling....................................................83
Fuel door .....................................................83
Fuel filler door ...........................................83
Fuel pump shut off system.................468
Fuses .......................................................... 436
Garage door opener ..........................363
Gas station information...................... 576
Gauges ........................................................151
Glove box ................................................333
Glove box light ...................................... 334
F
G

572
Alphabetical index
IS350/250_U
TachometerTacho indicator...................................... 151
Tachometer ............................................. 151
Tail lights
Switch ....................................................... 165
Talk switch .............................................. 303
Telephone switch ..................................302
Theft deterrent system
Alarm ..........................................................88
Engine immobilizer system ............. 86
Theft prevention labels ..........................90
Tire inflation pressure .........................425
Tire information Glossary................................................. 542
Size ...........................................................539
Tire identification number .............539
Uniform tire quality grading .........540
Tires
Chains .......................................................210
Checking ................................................. 414
If you have a flat tire.......................... 492
Inflation pressure................................ 425
Inflation pressure sensor..................416
Information............................................ 537
Replacing............................................... 492
Rotating tires .......................................... 414
Size ...........................................................528
Snow tires ................................................210
Tools ........................................................... 492
Total load capacity ...............................209 Towing
Dinghy towing ............................ 215, 216
Emergency towing ............................. 461
Trailer towing ........................................ 214
TRAC ..........................................................196
Traction control.......................................196
Transmission shift switches.................142
Trip meter ................................................... 151
Trunk Extending trunk space.....................357
Opener ...................................................... 47
Trunk light
Trunk light ................................................ 48
Wattage ................................................. 533
Turn signal lights Replacing light bulbs ....................... 452
Switch........................................................ 147
Wattage ................................................. 533
Vanity lights Vanity lights.......................................... 340
Wattage ................................................. 533
Vanity mirrors ........................................ 340
VDIM...........................................................196
Vehicle dynamics integrated management .........................................196
Vehicle identification number .......... 519
Vehicle stability control .......................196
Ventilators ................................................ 351
Voice command switch ..................... 302
VSC .............................................................196T
V