Lexus GS300/400 (2000 year). Manual — part 153

EM0DO–03

A09756

Before installing oxygen sensor, twist

sensor wire counterclockwise 3 and 1/2
turns.

After installing oxygen sensor, check that

sensor wire is not twisted. If it is twisted,
remove oxygen sensor and reinstall it.

HINT:

Ring

Ring

Ring

Bracket

Heat Insulator

RH Tailpipe

Heat
Insulator

Ring

Bracket

Ring

Tailpipe
Baffle

Gasket

Center Exhaust PIpe

Gasket

Ring

Heat Insulator

LH Tailpipe

Tailpipe
Baffle

44 (440, 32)

44 (440, 32)

Front Floor
Center Brace

Heated Oxygen Sensor

Heated Oxygen Sensor
(Bank 2 Sensor 2)

Heat Insulator

Heat Insulator

45 (450, 33)

44 (440, 32)

Gasket

N·m (kgf·cm, ft·lbf)

: Specified torque

Non–reusable part

Pipe Support Bracket

Front Exhaust Pipe

Gasket

Heat
Insulator

44 (440, 32)

–

ENGINE MECHANICAL (2JZ–GE)

EXHAUST SYSTEM

EM–97

1451

EXHAUST SYSTEM

COMPONENTS

IN00U–35

N17080

Filler Cap

Float

Reservoir Tank

Grommet

Clip

Slotted Spring Pin

: Specified torque

Non–reusable part

Cylinder

Piston

Push Rod

Washer

Snap Ring

Boot

Gasket

Lock Nut

Clevis Pin

Clevis

N·m (kgf·cm, ft·lbf)

12 (120, 9)

15 (155, 11)

–

INTRODUCTION

HOW TO USE THIS MANUAL

IN–1

1

HOW TO USE THIS MANUAL

GENERAL INFORMATION

1.

INDEX

An INDEX is provided on the first page of each section to guide you to the item to be repaired. To assist you
in finding your way through the manual, the section title and major heading are given at the top of every page.
2.

PRECAUTION

At the beginning of each section, a PRECAUTION is given that pertains to all repair operations contained
in that section.
Read these precautions before starting any repair task.
3.

TROUBLESHOOTING

TROUBLESHOOTING tables are included for each system to help you diagnose the problem and find the
cause. The fundamentals of how to proceed with troubleshooting are described on page

IN–21

.

Be sure to read this before performing troubleshooting.
4.

PREPARATION

Preparation lists the SST (Special Service Tools), recommended tools, equipment, lubricant and SSM (Spe-
cial Service Materials) which should be prepared before beginning the operation and explains the purpose
of each one.
5.

REPAIR PROCEDURES

Most repair operations begin with an overview illustration. It identifies the components and shows how the
parts fit together.
Example:

Illustration:

what to do and where

21. CHECK PISTON STROKE OF OVERDRIVE BRAKE

(a)

Task heading : what to do

SST 09350–30020 (09350–06120)

Set part No.

Component part No.

Detailed text :

how to do task

(b)

Piston stroke: 1.40

1.70 mm (0.0551

0.0669 in.)

Specification

Place SST and a dial indicator onto the overdrive brake pis-
ton as shown in the illustration.

Measure the stroke applying and releasing the compressed
air (392

785 kPa, 4 8

kgf/cm

2

or 57

114 psi) as shown

in the illustration.

IN–2

–

INTRODUCTION

HOW TO USE THIS MANUAL

2

The procedures are presented in a step–by–step format:

The illustration shows what to do and where to do it.

The task heading tells what to do.

The detailed text tells how to perform the task and gives other information such as specifications
and warnings.

Example:

This format provides the experienced technician with a FAST TRACK to the information needed. The upper
case task heading can be read at a glance when necessary, and the text below it provides detailed informa-
tion. Important specifications and warnings always stand out in bold type.
6.

REFERENCES

References have been kept to a minimum. However, when they are required you are given the page to refer
to.
7.

SPECIFICATIONS

Specifications are presented in bold type throughout the text where needed. You never have to leave the
procedure to look up your specifications. They are also found in Service Specifications section for quick ref-
erence.
8.

CAUTIONS, NOTICES, HINTS:

CAUTIONS are presented in bold type, and indicate there is a possibility of injury to you or other
people.

NOTICES are also presented in bold type, and indicate the possibility of damage to the components
being repaired.

HINTS are separated from the text but do not appear in bold. They provide additional information to
help you perform the repair efficiently.

9.

SI UNIT

The UNITS given in this manual are primarily expressed according to the SI UNIT (International System of
Unit), and alternately expressed in the metric system and in the English System.

Example:

Torque: 30 N·m (310 kgf·cm, 22 ft·lbf)

IN0EI–01

BO4111

Negative Cable

IN–10

–

INTRODUCTION

FOR ALL OF VEHICLES

10

FOR ALL OF VEHICLES

PRECAUTION

1.

FOR VEHICLES EQUIPPED WITH SRS AIRBAG AND
SEAT BELT PRETENSIONER

(a)

The LEXUS GS400/GS300 is equipped with an SRS
(Supplemental Restraint System), such as the driver air-
bag, front passenger airbag assembly, side airbag as-
sembly and seat belt pretensioners.
Failure to carry out service operations in the correct se-
quence could cause the supplemental restraint system to
unexpectedly deploy during servicing, possibly leading to
a serious accident.
Further, if a mistake is made in servicing the supplemental
restraint system, it is possible the SRS may fail to operate
when required. Before servicing (including removal or
installation of parts, inspection or replacement), be sure
to read the following items carefully, then follow the cor-
rect procedure described in this manual.

(b)

GENERAL NOTICE
(1)

Malfunction symptoms of the supplemental re-
straint system are difficult to confirm, so the diag-
nostic trouble codes become the most important
source of information when troubleshooting. When
troubleshooting the supplemental restraint system,
always inspect the diagnostic trouble codes before
disconnecting the battery (See page

DI–552

).

(2)

Work must be started after 90 seconds from the
time the ignition switch is turned to the ”LOCK” posi-
tion and the negative (–) terminal cable is discon-
nected from the battery.
(The supplemental restraint system is equipped
with a back–up power source so that if work is
started within 90 seconds of disconnecting the neg-
ative (–) terminal cable from the battery, the SRS
may deploy.)
When the negative (–) terminal cable is discon-
nected from the battery, memory of the clock and
audio systems will be cancelled. So before starting
work, make a record of the contents memorized by
the each memory system. Then when work is fin-
ished, reset the clock and audio systems as before.
This vehicle has power tilt and power telescopic
steering, power seat and power outside rear view
mirror, which are all equipped with memory function,
it is not possible to make a record of the memory
contents. So when the work is finished, therefore it
will be necessary to explain this fact to the custom-
er, and ask the customer to adjust the features and