check engine Lexus IS250 2008 User Guide

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2-1. Driving procedures
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When driving
08_IS350/250_U_(L/O_0708)
Engine (ignition) switch
Modes can be switched by pressing the “ENGINE START STOP” switch
when carrying the electronic key on your person. (The engine can be
started in any mode by operating the switch at the same time as depressing
the brake pedal or clutch pedal.)
■Starting the engine
Automatic transmission
Check that the parking brake is set.
Check that the shift lever is set in P.
Sit in the driver’s seat and firmly depress the brake pedal.
The “ENGINE START STOP” switch indicator turns green.
Press the “ENGINE START
STOP” switch.
STEP1
STEP2
STEP3
STEP4

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2-1. Driving procedures
08_IS350/250_U_(L/O_0708)
Manual transmissionCheck that the parking brake is set.
Check that the shift lever is set in N.
Firmly depress the clutch pedal.
The “ENGINE START STOP” switch indicator turns green.
Press the “ENGINE START
STOP” switch.
STEP1
STEP2
STEP3
STEP4

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2-1. Driving procedures
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When driving
08_IS350/250_U_(L/O_0708)
NOTICE
■To prevent battery discharge
Do not leave the “ENGINE START STOP” switch in ACCESSORY or IGNITION
ON mode for long periods without the engine running.
■When starting the engine
●Do not race a cold engine.
●If the engine becomes difficult to start or stalls frequently, have the engine
checked immediately.

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2-1. Driving procedures
08_IS350/250_U_(L/O_0708)
Turn signal lever
■Turn signals can be operated when
The “ENGINE START STOP” switch is in IGNITION ON mode.
■If the indicators flash faster than usual
Check that a light bulb in the front or rear turn signal lights has not burned out.
Left turn
Right turn
Move and hold the lever part-
way to signal a lane change
The left hand signal will flash
until you release the lever.
Move and hold the lever part-
way to signal a lane change
The right hand signal will flash
until you release the lever.

135
2-2. Instrument cluster
2
When driving
08_IS350/250_U_(L/O_0708)
NOTICE
■To prevent damage to the engine and its components
●Do not let the indicator needle of the tachometer enter the red zone, which indi-
cates the maximum engine speed.
●The engine may be overheating if the temperature gauge is in the red zone (H). In
this case, immediately stop the vehicle in a safe place, and check the engine after
it has cooled completely. (→P. 400)

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2-2. Instrument cluster
08_IS350/250_U_(L/O_0708)
CAUTION
■If a safety system warning light does not come on
Should a safety system light such as the ABS and SRS warning light not come on
when you start the engine, this could mean that these systems are not available to
help protect you in an accident, which could result in death or serious injury. Have
the vehicle inspected by your Lexus dealer immediately if this occurs.
■Warning lights
Warning lights inform the driver of malfunctions in any of the vehi-
cle’s systems. (→P. 360)
*: These lights turn on when the “ENGINE START STOP” switch is turned
to IGNITION ON mode to indicate that a system check is being per-
formed. They will turn off after the engine is started, or after a few sec-
onds. There may be a malfunction in a system if a light does not come on,
or if the lights do not turn off. Have the vehicle inspected by your Lexus
dealer.
(U.S.A.)(Canada)(Canada)(U.S.A.)
(Canada)(U.S.A.)(if equipped)
******
******

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2-2. Instrument cluster
08_IS350/250_U_(L/O_0708)■
Gear position display
(vehicles with an automatic transmission only)
Indicates the current gear, and the range of gears
that is available when the shift lever is in the S or D
position. the gear range is shown by the number of
dots ( •) and the current gear is shown as a number.
The transmission automatically selects the gears
within the driver selected gear range.
In the illustration to the left, a range of 6 available gears
(1 through 6) has been selected by the driver. (The shift
lever is in the D or S position with 6 ranges enabled) It is
possible for the transmission to automatically select
between all 6 of the gears. In this case, the transmission
has selected third gear.
■System check display
After switching the “ENGINE START ST OP” switch to IGNITION ON mode,
“CHECK” is displayed while system operation is checked. When the system check
is complete, “COMPLETED” is displayed before returning to the normal screen.
CAUTION
■The information display at low temperatures
Allow the interior of the vehicle to warm up before using the liquid crystal informa-
tion display. At extremely low temperatures, the information display monitor may
respond slowly, and display changes may be delayed.
For example, there is a lag between the driver's shifting and the new gear number
appearing on the display. This lag could cause the driver to downshift again, causing
rapid and excessive engine braking and possibly an accident resulting in personal
death or injury.

149
2-3. Operating the lights and windshield wipers
2
When driving
08_IS350/250_U_(L/O_0708)
■Rain drop sensor (vehicles equipped with the rain-sensing windshield wipers)
If the wiper switch is turned to “AUTO” position while the “ENGINE START STOP”
switch is in IGNITION ON mode, the wiper operate once to show that “AUTO”
mode is activated.
■Outside rear view mirror defogger activation linked to windshield wiper opera-
tion
The outside rear view mirror defogger automatically turns on when you operate the
windshield wipers.
■If no windshield washer fluid sprays
Check that the washer nozzles are not blocked if there is washer fluid in the wind-
shield washer fluid reservoir.
■Customization that can be configured at Lexus dealer
Settings (e.g. drip prevention function) can be changed. (Customizable features
→ P. 4 3 6 )
CAUTION
■Caution regarding the use of windshield wipers in “AUTO” mode
The windshield wipers may operate unexpectedly if the sensor is touched or the
windshield is subject to vibration in “AUTO” mode. Take care that your fingers or
anything else do not become caught in the windshield wipers.
The sensor judges the amount of raindrops.

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2-5. Driving information
2
When driving
08_IS350/250_U_(L/O_0708)
Winter driving tips
Carry out the necessary preparations and inspections before driving the
vehicle in winter. Always drive the vehicle in a manner appropriate to the
prevailing weather conditions.
■Pre-winter preparations
● Use fluids that are appropriate to the prevailing outside tempera-
tures.
• Engine oil
• Engine coolant
• Washer fluid
• Have a service technician inspect the level and specific gravity
of battery electrolyte.
● Have the vehicle fitted with four snow tires or purchase a set of
tire chains for the rear tires.
Ensure that all tires are the specified size and the same brand, and that
chains match the size of the tires.
■Before driving the vehicle
Perform the following according to the driving conditions.
● Do not try to forcibly open a window or move a wiper that is fro-
zen. Pour warm water over the frozen area to melt the ice. Wipe
away the water immediately to prevent it from freezing.
● To ensure proper operation of the climate control system fan,
remove any snow that has accumulated on the air inlet vents in
front of the windshield.
● Remove any ice that has accumulated on the vehicle chassis.
● Periodically check for and remove any excess ice or snow that
may have accumulated in the wheel well or on the brakes.

Maintenance and care4
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08_IS350/250_U_(L/O_0708)
4-1. Maintenance and care ............................... 274
Cleaning and protecting the vehicle exterior.............. 274
Cleaning and protecting the vehicle interior .............. 277
4-2. Maintenance .................. 280 Maintenance requirements ....................... 280
General maintenance ......... 282
Emission inspection and maintenance (I/M)
programs............................... 285
4-3. Do-it-yourself maintenance ................ 286
Do-it-yourself service precautions ........................... 286
Hood ......................................... 289
Positioning a floor jack ......... 290
Engine compartment ............ 292
Tires ............................................ 306
Tire inflation pressure ............ 316 Wheels ...................................... 320
Air conditioning filter ........... 322
Electronic key battery.......... 325
Checking and replacing
fuses ........................................ 327
Headlight aim .......................... 341
Light bulbs................................ 342