Line pressure LEXUS GS400 2000 Service User Guide

EC04V±06
B08612
PCV Valve VSV for EVAP
Front TWC
EVAP Service Port
Fill Check LineCutoff ValveCharcoal Canister
Air Inlet Line
Vapor Pressure Sensor
Fuel Tank Cap
VSV for Vapor
Pressure Sensor
Purge Line
EVAP Line
Vent Line
Air Drain Hose
Rear TWC
EC±2
± EMISSION CONTROL (2JZ±GE)PARTS LAYOUT AND SCHEMATIC DRAWING
1453 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
PARTS LAYOUT AND SCHEMATIC DRAWING
LOCATION

EC04W±06
B08613
VSV for Vapor Pressure Sensor
Purge Line
Air Inlet LineAir Drain Hose
EVAP Line
Fuel Tank Charcoal Canister VSV for EVAPVapor Pressure Sensor
PCV Valve
Front TWC Front TWC
Vent Line
Fuel Tank
Cap
EVAP
Service
Port
Rear TWC
± EMISSION CONTROL (2JZ±GE)PARTS LAYOUT AND SCHEMATIC DRAWING
EC±3
1454 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DRAWING

EC053±05
B06731
RH Rear Drive Shaft
Rear Suspension
Member Brace
Charcoal Canister AssemblyVapor Pressure
Sensor Connector
EVAP HoseVSV Connector
for Vapor Pressure
Sensor
Air Inlet Hose
83 (850, 61)
50 (510, 37)
Purge Hose
N´m (kgf´cm, ft´lbf) : Specified torque
Air Drain Hose
Vent Line Hose Canister Tank
EC±6
± EMISSION CONTROL (2JZ±GE)EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
1457 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
COMPONENTS

EC0BD±02
B02709
Gasket
Vacuum
Valve Pressure
Valve
B06544
Vacuum
Gauge
B01982
LEXUS Hand±Held Tester
DLC 3
B06548Battery
± EMISSION CONTROL (2JZ±GE)EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
EC±7
1458 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. INSPECT LINES AND CONNECTORS
Visually check for loose connections, sharp bends or damage.
2. INSPECT FUEL TANK FILLER PIPE
Visually check for deformation, cracks or fuel leakage.
3. VISUALLY INSPECT FUEL TANK CAP
Check if the cap and/or gasket are deformed or damaged.
If necessary, repair or replace the cap.
4. INSPECT EVAP SYSTEM LINE
(a) Warm up the engine and stop the engine.
Allow the engine to warm up to normal operating tempera-
ture.
(b) Install a vacuum gauge (EVAP control system test equip-
ment vacuum gauge) to the EVAP service port on the
purge line.
(c) LEXUS Hand±Held Tester:
Forced driving of the VSV for the EVAP.
(1) Connect a LEXUS hand±held tester to the DLC3.
(2) Start the engine.
(3) Push the LEXUS hand±held tester main switch ON.
(4) Use the ACTIVE TEST mode on the LEXUS hand±
held tester to operate the VSV for the EVAP.
(d) If you have no LEXUS Hand±Held Tester:
Forced driving of the VSV for the EVAP.
(1) Disconnect the VSV connector for the EVAP.
(2) Connect the positive (+) and negative (±) leads from
the battery to the VSV terminals for the EVAP.
(3) Start the engine.

B06545
B06743Hose ClipperAir Drain Hose
B06546
Pressure
Gauge
Pressure EC±8
± EMISSION CONTROL (2JZ±GE)EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
1459 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(e) Check the vacuum at idle.
Vacuum:
Maintain at 0.368 ± 19.713 in.Hg (5 ± 268 in.Aq) for over
5 seconds
HINT:
If the vacuum does not change, you can conclude that the hose
connecting the VSV to the service port has come loose or is
blocked, or the VSV is malfunctioning.
(f) LEXUS Hand±Held Tester:
Conclude forced driving of the VSV for the EVAP.
(1) Stop the engine.
(2) Disconnect the LEXUS hand±held tester from the
DLC3.
(g) If you have no LEXUS Hand±Held Tester:
Conclude forced driving of the VSV for the EVAP.
(1) Stop the engine.
(2) Disconnect the positive (+) and negative (±) leads
from the battery from the VSV terminals for the
EVAP.
(3) Connect the VSV connector for the EVAP.
(h) Disconnect the vacuum gauge from the EVAP service
port on the purge line.
(i) Connect a pressure gauge to the EVAP service port on
the purge line.
(j) Check the pressure.
(1) Close off the air drain hose at the marked position
of the canister with a hose clipper or similar instru-
ment.
(2) Add the pressure (13.5 ± 15.5 in.Aq) from the EVAP
service port.
Pressure:
2 minutes after the pressure is added, the gauge
should be over 7.7 ± 8.8 in.Aq.
HINT:
If you can't add pressure, you can conclude that the hose con-
necting the VSV
canister
fuel tank has slipped off or the
VSV is open.

B06547
Fuel Tank Cap
B06840
AirDisconnect
EVAP Line Hose
B06841Air
Disconnect
Plug
Disconnect
EVAP Line Hose
Purge Line
Hose
Purge Port
± EMISSION CONTROL (2JZ±GE)EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
EC±9
1460 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(3) Check if the pressure decreases when the fuel tank
cap is removed while adding pressure.
HINT:
If the pressure does not decrease when the filler cap is re-
moved, then you can conclude that the hose connecting the
service port to the fuel tank is blocked, etc.
(k) Disconnect the pressure gauge from the EVAP service
port on the purge line.
5. CHECK AIRTIGHTNESS IN FUEL TANK AND FILLER
PIPE
(a) Disconnect the EVAP line hose from the charcoal canister
side and then pressurize and make the internal pressure
in the fuel tank 4 kPa (41 gf/cm
2, 0.58 psi).
(b) Check that the internal pressure of the fuel tank can be
hold for 1 minute.
(c) Check the connected portions of each hose and pipe.
(d) Check the installed parts on the fuel tank.
If there is no abnormality, replace the fuel tank and filler pipe.
(e) Reconnect the EVAP line hose to the charcoal canister.
6. INSPECT FUEL CUTOFF VALVE AND FILL CHECK
VA LV E
(a) Disconnect the purge line hose and EVAP line hose from
the charcoal canister.
(b) Disconnect the air drain hose from the canister tank, and
plug its.
(c) Pressurize 4 kPa (41 gf/cm
2, 0.58 psi) to the purge port
and check that there is ventilation through the EVAP line
hose.
HINT:
In the condition that the fuel fuel is full, as the float value of the
fill check valve is closed and has no ventilation, it is necessary
to check the fuel amount (volume).
(d) Check if there is any struck in the vent line hose and EVAP
line hose.
If there is no stuck in hoses, replace the fuel cutoff valve and fill
check valve.
(e) Reconnect the purge line hose and EVAP line hose to the
charcoal canister.
(f) Reconnect the air drain hose to the canister tank.

B06842
Air
Air Inlet Line Hose
B06803
Push
PinchPinch
A A
B06791
B06792Air
Purge Port
Air Drain Port
EVAP Port
Cap
Vent Port
EC±10
± EMISSION CONTROL (2JZ±GE)EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
1461 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
7. CHECK AIR INLET LINE
(a) Disconnect the air inlet line hose from the charcoal canis-
ter.
(b) Check that there is ventilation in the air inlet line.
(c) Reconnect the air inlet line hose to the charcoal canister.
8. REMOVE CHARCOAL CANISTER ASSEMBLY
(a) Disconnect the RH rear drive shaft from the differential.
(See page SA±52)
(b) Remove the charcoal canister assembly.
(1) Disconnect the vapor pressure sensor connector.
(2) Disconnect the VSV connector for vapor pressure
sensor.
(3) Disconnect the purge line hose, EVAP line hose
and air inlet line from the charcoal canister.
(4) Disconnect the vent line hose from the charcoal
canister.
Push the connector deep inside, pinch portion A,
and pull out the connector.
(5) Disconnect the air drain hose from the chanister
tank.
(6) Remove the 3 nuts and the charcoal canister as-
sembly.
9. INSPECT CHARCOAL CANISTER
(a) Visually check the charcoal canister for cracks or dam-
age.
(b) Inspect the charcoal canister operation.
(1) Plug the vent port with a cap.
(2) While holding the purge port closed, blow air (1.76
kPa, 18 gf/cm
2, 0.26 psi) into the EVAP port and
check that air flows from the air drain port.

± INTRODUCTIONTERMS
IN±37
37 Author: Date:
2000 LEXUS GS300/GS400 (RM718U) CW
Curb Weight
DCDirect Current
DEFDefogger
DFLDeflector
DIFF.Differential
DIFF. LOCKDifferential Lock
D/INJDirect Injection
DLIDistributorless Ignition
DOHCDouble Over Head Cam
DPDash Pot
DSDead Soak
DSPDigital Signal Processor
EBDElectronic Brake Force Distribution
ECAMEngine Control And Measurement System
ECDElectronic Controlled Diesel
ECDYEddy Current Dynamometer
ECUElectronic Control Unit
EDElectro±Deposited Coating
EDICElectric Diesel Injection Control
EDUElectronic Driving Unit
EFIElectronic Fuel Injection
E/GEngine
EGR±VMEgr±Vacuum Modulator
ELREmergency Locking Retractor
ENGEngine
ESAElectronic Spark Advance
ETCSElectronic Throttle Control System
EVPEvaporator
E±VRVElectric Vacuum Regulating Valve
EXHExhaust
FEFuel Economy
FFFront±Engine Front±Wheel±Drive
F/GFuel Gage
FIPGFormed In Place Gasket
FLFusible Link
F/PFuel Pump
FPUFuel Pressure Up
FrFront
FRFront±Engine Rear±Wheel±Drive
F/WFlywheel
FW/DFlywheel Damper
FWDFront±Wheel±Drive
GASGasoline
GNDGround
HACHigh Altitude Compensator
H/BHatchback

MA001±07
± MAINTENANCEOUTSIDE VEHICLE
MA±1
44 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
OUTSIDE VEHICLE
GENERAL MAINTENANCE
These are maintenance and inspection items which are considered to be the owner's responsibility.
They can be done by the owner or they can have them done at a service shop.
These items include those which should be checked on a daily basis, those which, in most cases, do not
require (special) tools and those which are considered to be reasonable for the owner to do.
Items and procedures for general maintenance are as follows.
1. GENERAL NOTES

Maintenance items may vary from country to country. Check the owner's manual supplement in which
the maintenance schedule is shown.

Every service item in the periodic maintenance schedule must be performed.

Periodic maintenance service must be performed according to whichever interval in the periodic main-
tenance schedule occurs first, the odometer reading (miles) or the time interval (months).

Maintenance service after the last period should be performed at the same interval as before unless
otherwise noted.

Failure to do even one item an cause the engine to run poorly and increase exhaust emissions.
2. TIRES
(a) Check the pressure with a gauge. If necessary, adjust.
(b) Check for cuts, damage or excessive wear.
3. WHEEL NUTS
When checking the tires, check the nuts for looseness or for missing nuts. If necessary, tighten them.
4. TIRE ROTATION
Check the owner's manual supplement in which the maintenance schedule is shown.
5. WINDSHIELD WIPER BLADES
Check for wear or cracks whenever they do not wipe clean. If necessary, replace.
6. FLUID LEAKS
(a) Check underneath for leaking fuel, oil, water or other fluid.
(b) If you smell gasoline fumes or notice any leak, have the cause found and corrected.
7. DOORS AND ENGINE HOOD
(a) Check that all doors and the tailgate operate smoothly, and that all latches lock securely.
(b) Check that the engine hood secondary latch secures the hood from opening when the primary latch
is released.

PP0UD±01
± PREPARATIONSFI (2JZ±GE)
PP±9
61 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
SFI (2JZ±GE)
SST (Special Service Tools)
09205±76030Cylinder Head Setting Bolt
Tightening AdaptorECT sensor
09268±41047Injection Measuring Tool Set
(09268±41110)Adaptor
(09268±41300)Clamp
(09268±52011)Injection Measuring Attachment
09268±45014EFI Fuel Pressure Gauge
(09268±41190)Adaptor
(90405±06167)I Union
09612±24014Steering Gear Housing Overhaul
Tool Set
(09617±24011)Steering Rack WrenchFuel pressure pulsation damper
09631±22020Power Steering Hose Nut
14 x 17 mm Wrench SetFuel line flare nut
09816±30010Oil Pressure Switch SocketKnock sensor