check engine Lexus GS350 2008 Do-it-yourself maintenance / LEXUS 2008 GS460/350 (OM30A87U) User Guide

130
2-1. Driving procedures
GS_G_U
May 13, 2008 5:14 pm
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.

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2-2. Instrument cluster
2
When driving
GS_G_U
May 13, 2008 5:14 pm
NOTICE
■To prevent damage to the engine and its components
●The engine may be overheating if the engine coolant temperature gauge is in the
red zone (“H”). In this case, immediately stop the vehicle in a safe place. Check
the engine after it has cooled completely. (P. 5 3 3 )
●Do not let the indicator needle of the tachometer enter the red zone, which indi-
cates the maximum engine speed.
■To activate the light sensitivity function properly
Do not affix a sticker or window tint to the rear window glass, or put an object
behind the rear seat.

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2-2. Instrument cluster
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May 13, 2008 5:14 pm
CAUTION
■If a safety system warning light does not come on
Should a safety system light such as ABS and the SRS airbag warning light not
come on when you turn to IGNITION ON mode, this could mean that these sys-
tems 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 the indicated
vehicle’s systems. ( P. 4 8 8 )
*: 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 en gine is on, or after a few seconds.
There may be a malfunction in a system if the lights do not come on, or
turn off. Have the vehicle inspected by your Lexus dealer.
(U.S.A.)(Canada)(U.S.A.)(Canada)
(U.S.A.)(Canada)(if equipped)
*******
*****
*

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2-2. Instrument cluster
2
When driving
GS_G_U
May 13, 2008 5:14 pm
■System check display
After switching the “ENGINE START STOP” 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.
NOTICE
■The multi-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.

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2-5. Driving information
2
When driving
GS_G_U
May 13, 2008 5:14 pm
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 appropria te to the prevailing outside tempera-
tures.
• Engine oil
• Engine coolant
• Washer fluid
● Have a service technician inspect th e 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 same si ze and 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 w indow 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 accumul ated 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
387
GS_G_U
May 13, 2008 5:14 pm
4-1. Maintenance and 
care .............................. 388
Cleaning and protecting 
the vehicle exterior............ 388
Cleaning and protecting 
the vehicle interior ............... 391 4-2. Maintenance .................. 394
Maintenance 
requirements........................ 394
General maintenance .......... 396
Emission inspection and 
maintenance (I/M) 
programs ............................... 399
4-3. Do-it-yourself 
maintenance ................ 400
Do-it-yourself service 
precautions ........................... 400
Hood .......................................... 403
Positioning a floor jack ......... 404
Engine compartment ........... 406
Tires............................................. 421
Tire inflation pressure............ 431
Wheels ...................................... 435
Air conditioning filter ........... 437
Electronic key battery.......... 440
Checking and replacing 
fuses ........................................ 442
Headlight aim .......................... 467
Light bulbs ................................ 470

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4-2. Maintenance
GS_G_U
May 13, 2008 5:14 pm
General maintenance
Engine compartment
ItemsCheck points
Brake fluid• At the correct level? (P. 4 1 6 )
Engine coolant• At the correct level? ( P. 4 1 4 )
Engine oil• At the correct level? ( P. 4 0 9 )
Exhaust system• No fumes or strange sounds?
Radiator/condenser/hoses• Not blocked with foreign matter? 
( P. 4 1 5 )
Wa s h e r f l u i d• At the correct level? ( P. 4 2 0 )
12 volt battery• Maintenance-free ( P. 4 1 7 )
Listed below are the general maintenance items that should be performed
at the intervals specified in the “Warranty and Services Guide/Owner’s
Manual Supplement”. It is recommend ed that any problem you notice
should be brought to the attention of your Lexus dealer or qualified service
shop for advice.

398
4-2. Maintenance
GS_G_U
May 13, 2008 5:14 pm
Vehicle exterior
ItemsCheck points
Doors/trunk• Operate smoothly?
Engine hood• The lock system works properly?
Fluid leaks• Is there any leakage after parking?
Ti r e
• Inflation pressure is correct?
• Tire surfaces not worn or dam-aged?
• Tires rotated according to the
maintenance schedule?
• Wheel nuts are not loose?
CAUTION
■If the engine is running
Turn off the engine and ensure that there is adequate ventilation before performing
maintenance checks.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
GS_G_U
May 13, 2008 5:14 pm
■Installing the clips
Push up center portion
Insert
Press
Engine oil
With the engine at operating temperat ure and turned off, check the oil
level on the dipstick.
■ Checking the engine oil
Park the vehicle on level ground. After turning off the engine, wait
a few minutes for the oil to drain back into the bottom of the
engine.
Hold a rag under the end and pull
the dipstick out.
Wipe the dipstick clean.
Reinsert the dipstick fully.
Holding a rag under the end, pull the dipstick out and check the
oil level.
STEP1
STEP2
STEP3
STEP4
STEP5

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4-3. Do-it-yourself maintenance
GS_G_U
May 13, 2008 5:14 pm
Wipe the dipstick and reinsert it fully.Low
Full
■ Adding engine oil
If the oil level is below or near the
low level mark, add engine oil of
the same type as already in the
engine.
Make sure to check the oil type and prepare the items needed before
adding oil.
Remove the oil filler cap.
Add engine oil slowly, checking the dipstick.
Install the filler cap, turning it clockwise.STEP6
Oil gradeILSAC multigrade engine oil
Oil quantity
(Low  Full)1.6 qt. (1.5 L, 1.3 Imp. qt.)
ItemsClean funnel
STEP1
STEP2
STEP3