2006 Lexus GS430 Scheduled Maintenance Guide / LEXUS 2006 GS430/GS300 FROM JAN. 2006 PROD. OWNER'S MANUAL (OM30786U)

MAINTENANCE
505
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 operation of the emission
control system. When the OBD system determines that a
problem exists somewhere in the emission control system, the
malfunction indicator lamp comes on. In this case, your vehicle
may not pass the I/M test and need to be repaired. Contact
your Lexus dealer to service the vehicle.
Even if the malfunction indicator lamp does not come on, your
vehicle may not pass the I/M test as readiness codes have not
been set in the OBD system.
Readiness codes are automatically set during ordinary driving.
However, when the battery is disconnected or run down, the
codes are erased. Also, depending on your driving habits, the
codes may not be completely set.
Also, if the malfunction indicator lamp had come on recently
due to temporary malfunction such as a loose fuel tank cap,
your vehicle may not pass the I/M test.
The malfunction indicator lamp will go off after taking several
driving trips, but the error code in the OBD system will not be
cleared unless about 40 trips or more are taken.
If your vehicle does not pass the I/M test and the malfunction
indicator lamp does not come on, contact your Lexus dealer to
prepare the vehicle for re −testing.

MAINTENANCE
506

SECTION 6 – 1
507
SERVICE PROCEDURES AND
SPECIFICATIONS
Introduction
Vehicle identification508
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Theft prevention labels 509
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Engine compartment overview (GS430) 510
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Engine compartment overview (GS300) 511
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Do−it−yourself service precautions 513
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Positioning the jack 515
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Parts and tools 516
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. . . . .

INTRODUCTION
508
VEHICLE IDENTIFICATION
G61001
The vehicle identification number (VIN) is the legal
identifier for your vehicle. This number is on the left top
of the instrument panel and can be seen through the
windshield from outside.
This is the primary identification number for your Lexus. It is
used in registering the ownership of your vehicle.
G61008
The vehicle identification number (VIN) is also on the
Certification Label.
G61009
GS430 GS300
The engine number is stamped on the engine block as
shown.

INTRODUCTION
509
THEFT PREVENTION LABELS(U.S.A.ONLY)
61l067a
Your new vehicle carries theft prevention labels which are
approximately 47 mm (1.85 in.) by 12 mm (0.47 in.).
The purpose of these labels is to reduce the incidence of
vehicle thefts by facilitating the tracing and recovery of parts
from stolen vehicles. The label is designed so that once it is
applied to a surface, any attempt to remove it will result in
destroying the integrity of the label. Transferring these labels
intact from one part to another will be impossible.
NOTICE
You should not attempt to remove the theft prevention
labels as it may violate certain state or federal laws.

G61002
INTRODUCTION
510
ENGINE COMPARTMENT OVERVIEW (GS430)
1 Engine oil filler cap
2 Engine oil level
dipstick
3 Brake fluid reservoir
4 Fuse box
5 Washer fluid tank
6 Engine coolant
reservoir
7 Electric cooling fans
8 Condenser
9 Radiator
10 Fuse box
11 Battery

G61003
INTRODUCTION
511
ENGINE COMPARTMENT OVERVIEW (GS300)
1 Engine oil level
dipstick
2 Engine oil filler cap
3 Brake fluid reservoir
4 Fuse box
5 Washer fluid tank
6 Engine coolant
reservoir
7 Electric cooling fans
8 Condenser
9 Radiator
10 Fuse box
11 Battery

INTRODUCTION
512
Removing the engine compartment cover
Before checking and replacing the blade type fuses, etc.
in the engine compartment, remove the engine
compartment cover as follows:
G61004
CAUTION
Be sure to turn off the engine before removing the
engine compartment cover. Failure to do so may result
in burns from heated components or serious injury
through becoming caught in moving parts.
You must remove the front cover before removing the side
covers. The location of the plastic clips is the same for all
engine models.
1 Turn the plastic screw until it turns freely. Although it is
turned freely, it cannot be removed from the engine
compartment cover.
2Push the core of the clips and remove the clips.
Remove the cover. Be careful not to lose the removed plastic
clips.