2008 Lexus IS250 service indicator

285
4-2. Maintenance
4
Maintenance and care
08_IS350/250_U_(L/O_0708)
Emission inspection and maintenance (I/M) programs
Some states have vehicle emission inspection programs which include
OBD (On Board Diagnostics) checks. The OBD system monitors the oper-
ation of the emission control system.
■If the malfunction indicator lamp comes on
The OBD system determines that a problem exists somewhere in
the emission control system. Your vehicle may not pass the I/M test
and may need to be repaired. Cont act your Lexus dealer to service
the vehicle.
■ Your vehicle may not pass the I/M test:
●When the battery is disconnected or discharged
Readiness codes that are set du ring ordinary driving are erased.
Also, depending on your driving habits, the readiness codes may
not be completely set.
● When the fuel tank cap is loose
The malfunction indicator lamp comes on as a temporary mal-
function and your vehicle may not pass the I/M test.
■ When the malfunction indicator la mp goes off after several driv-
ing trips
The error code in the OBD system will not be cleared unless the
vehicle is driven 40 or more times.
■ If your vehicle does not pass the I/M test
Contact your Lexus dealer to prepare the vehicle for re-testing.

422
6-1. Specifications
08_IS350/250_U_(L/O_0708)
■Gasoline quality standards
●Automotive manufacturers in the US, Europe and Japan have developed a
specification for fuel quality called World-Wide Fuel Charter (WWFC) that is
expected to be applied worldwide.
●The WWFC consists of four categories that are based on required emission
levels. In the US, category 4 has been adopted.
●The WWFC improves air quality by lowering emissions in vehicle fleets, and
customer satisfaction through better performance.
■Lexus recommends the use of gasoline containing detergent additives
●Lexus recommends the use of gasoline that contains detergent additives to
avoid build-up of engine deposits.
●All gasoline sold in the US contains detergent additives to clean and/or keep
clean intake systems.
■Lexus recommends the use of cleaner burning gasoline
Cleaner burning gasoline, including reformulated gasoline that contains oxygen-
ates such as ethanol or MTBE (Methyl Tertiary Butyl Ether) is available in many
areas.
Lexus recommends the use of cleaner burning gasoline and appropriately blended
reformulated gasoline. These types of gasoline provide excellent vehicle perfor-
mance, reduce vehicle emissions and improve air quality.
■Lexus does not recommend blended gasoline
●Lexus allows the use of oxygenate blended gasoline where the oxygenate con-
tent is up to 10% ethanol or 15% MTBE.
●If you use gasohol in your Lexus, be sure that it has an octane rating no lower
than 87.
●Lexus DOES NOT recommend the use of gasoline containing methanol.
■Lexus does not recommend gasoline containing MMT
Some gasoline contains octane enhancing additive called MMT (Methylcyclopen-
tadienyl Manganese Tricarbonyl).
Lexus DOES NOT recommend the use of gasoline that contains MMT. If fuel con-
taining MMT is used, your emission control system may be adversely affected.
The malfunction indicator lamp on the instrument cluster may come on. If this hap-
pens, contact your Lexus dealer for service.

454
Alphabetical index
08_IS350/250_U_(L/O_0708)
Scuff lighting ............................................ 231
Seat beltsAdjusting the seat belt........................ 53
Automatic locking retractor............ 54
Child restraint system installation ............................................. 98
Cleaning and maintaining the seat belts ..................................... 278
Emergency locking retractor ......... 54
How to wear your seat belt............. 52
How your child should wear the seat belt .......................................... 55
Pregnant women, proper seat belt use ......................... 54
Reminder light ..................................... 362
Seat belt extenders .............................. 55
Seat belt pretensioners...................... 53
Seat heaters ..................................251, 253
Seat position memory ............................ 49
Seat ventilators ......................................253
Seating capacity ..................................... 182
Seats
Adjustment............................................... 44
Adjustment precautions.................... 45
Child seats/child restraint system installation ............................. 98
Cleaning..................................................277
Driver’s seat position memory....... 46
Front passenger seat position memory.................................................. 49
Head restraint........................................... 51
Properly sitting in the seat ................. 77
Seat heaters ................................251, 253
Ventilated seats .................................. 253 Service reminder indicators .............136
Shift lever
Automatic transmission ....................122
If the shift lever cannot be shifted from P....................................392
Manual transmission.......................... 126
Shift lever lighting ...................................231
Shift lock system.................................... 392
Shopping bag hooks ............................. 261
Side airbags ............................................... 79
Side marker lights Switch ........................................................ 143
Side mirror Adjusting and folding ........................... 61
Mirror position memory ....................46
Smart access system with
push-button startEntry function .......................................... 22
Starting the engine................................ 117
Spare tire
Inflation pressure ................................. 316
Spare tire ............................................... 382
Spark plug .................................................. 411
Specifications ......................................... 406
Speech command switch*
Speedometer Speed indicator....................................130
Speedometer ........................................ 130
Steering wheel Audio switches ....................................229
Manual adjustment .............................. 58
Power adjustment................................ 59
Steering wheel positionmemory ..................................................46
Storage feature ..................................... 236
Stuck If your vehicle becomes stuck .... 402S