2000 LEXUS GS400 fuel

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.

A11125
Throttle Body and Intake Air Connector AssemblyWater Bypass Hose
PCV Hose
EVAP Hose
 Gasket
Air Assist Hose
Vacuum
Hose
PS Air Hose
Air Intake Chamber
Engine Wire
Clamp
Drive Belt
TensionerClamp Bracket
Ground StrapFuel Pressure
Pulsation Damper Clamp Bracket
Water Bypass
Outlet
No.1 Water Bypass Pipe
No.3 Timing Belt Cover O±Ring
Oil Filler CapFuel Inlet Pipe
PS Air Hose
Hose
Clamp
Timing Belt
Tensioner
PS Pump Stay
Oil Dipstick
and Guide
for A/T
PS Vane Pump Water Bypass Hose
28 (280, 21)
Engine Wire
 O±Ring
No.2 Timing Belt Cover
GasketGasket
21 (210, 15)
32.5 (325, 24)
 Gasket
 Gasket
Engine Wire
Clamp
 O±Ring  O±RingOil Dipstick and
Guide for Engine
27 (270, 20)
58 (590, 43)39.2 (400, 29)N´m (kgf´cm, ft´lbf) : Specified torque
 Non±reusable Part
Dust BootEngine Wire
Clamp
No.2 Vacuum Pipe
Hose Clamp
Vacuum Control
Valve Set
EM±30
± ENGINE MECHANICAL (2JZ±GE)CYLINDER HEAD
1384 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

EM0D1±05
A11132
Compression Tester
± ENGINE MECHANICAL (2JZ±GE)COMPRESSION
EM±3
1357 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
COMPRESSION
INSPECTION
HINT:
If there is lack of power, excessive oil consumption or poor fuel
economy, measure the compression pressure.
1. WARM UP AND STOP ENGINE
Allow the engine to warm up to normal operating temperature.
2. REMOVE ENGINE COVER
Remove the 4 nuts and engine cover.
3. DISCONNECT IGNITION COILS AND HIGH±TENSION
CORD SET ASSEMBLY (See page IG±7)
4. REMOVE SPARK PLUGS
5. DISCONNECT INJECTOR CONNECTORS
6. CHECK CYLINDER COMPRESSION
(a) Insert a compression tester into the spark plug hole.
(b) While cranking the engine, measure the compression
pressure.
HINT:
Always use a fully charged battery to obtain engine revolutions
of 250 rpm or more.
(c) Repeat steps (a) through (b) for each cylinder.
NOTICE:
This measurement must be done in as short a time as pos-
sible.
Compression:
1,324 kPa (13.5 kgf/cm
2, 192 psi) or more
Minimum pressure:
1,079 kPa (11.0 kgf/cm
2, 156 psi)
Difference between each cylinder:
98 kPa (1.0 kgf/cm
2, 14 psi) or less
(d) If the cylinder compression in 1 or more cylinders is low,
pour a small amount of engine oil into the cylinder through
the spark plug hole and repeat steps (a) through (b) for
the cylinder with low compression.

If adding oil helps the compression, it is likely that
the piston rings and/or cylinder bore are probably
worn or damaged.

If pressure stays low, a valve may be sticking or
seating improper, or there may be leakage past the
gasket.

A02732
(a)
(b) (c)
(d)(d)
(c) (b)
A02811
A02733
Clamp Bracket
A11123
5 mm
Hexagon
Wrench
± ENGINE MECHANICAL (2JZ±GE)CYLINDER HEAD
EM±35
1389 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
20. DISCONNECT ENGINE WIRE FROM CYLINDER HEAD
(a) Disconnect the ground strap from the cylinder head.
(b) Disconnect the 2 water bypass hoses from the hose
clamps on the cylinder head and oil filter bracket.
(c) Remove the 2 bolts and hose clamps.
(d) Disconnect the heated oxygen sensor (bank 2 sensor 1)
connector and engine wire clamp from the hose clamps.
(e) Disconnect the heated oxygen sensor (bank 1 sensor 1)
connector.
(f) Disconnect the crankshaft position sensor connector.
(g) Disconnect the generator connector.
(h) Remove the bolt and clamp bracket, and disconnect the
engine wire from the water pump.
(i) Disconnect the 2 ground terminals from the intake man-
ifold.
(j) Disconnect the 2 engine wire clamps from the No.1 oil
pipe and clamp bracket on the intake manifold.
(k) Remove the bolt and clamp bracket.
(l) Disconnect the ECT sensor connector.
(m) Remove the 2 knock sensor connectors.
(n) Remove the oil pressure switch connector.
(o) Remove the oil level sensor connector.
(p) Remove the starter connector.
(q) Remove the 6 injector connectors.
(r) Remove the camshaft timing oil control valve connector.
(s) Remove the camshaft position sensor connector.
(t) Using a 5 mm hexagon wrench, remove the bolt holding
the engine wire protector to the No.2 cylinder head cover.
(u) Remove the 3 nuts, and disconnect the engine wire pro-
tector from the intake manifold.
21. REMOVE FUEL PRESSURE PULSATION DAMPER
(See page SF±26)

A02698
Seal Packing
A11122
A11123
± ENGINE MECHANICAL (2JZ±GE)CYLINDER HEAD
EM±55
1409 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(b) Install the VV±i (intake camshaft timing) pulley.
(See page EM±23)
7. CONNECT TIMING BELT TO CAMSHAFT TIMING
PULLEYS (See page EM±23)
8. INSTALL NO.1 AND NO.2 CYLINDER HEAD COVERS
(a) Remove the any old packing (FIPG) material.
(b) Apply seal packing to the cylinder head as shown in the
illustration.
Seal packing: Part No. 08826±00080 or equivalent
(c) Install the gaskets to the cylinder head covers.
(d) Install the cylinder head covers with the 12 bolts and 4
nuts.
Torque: 8.5 N´m (85 kgf´cm, 75 in.´lbf)
9. INSTALL INTAKE MANIFOLD ASSEMBLY
(a) Install a new gasket and the intake manifold and delivery
pipe assembly with the 7 bolts and 2 nuts.
Torque: 28 N´m (280 kgf´cm, 21 ft´lbf)
(b) Pass the water bypass hose between the No.2, No.3 in-
take ports of the manifold and delivery pipe.
(c) Install the manifold stay with the 2 bolts.
Torque: 40 N´m (400 kgf´cm, 30 ft´lbf)
(d) Install the starter wire to the manifold stay.
10. INSTALL FUEL PRESSURE PULSATION DAMPER
(See page SF±27)
11. CONNECT ENGINE WIRE TO CYLINDER HEAD
(a) Install the engine wire protector with the 3 nuts.
(b) Using a 5 mm hexagon wrench, install the bolt holding the
engine wire protector to the No.2 cylinder head cover.
(c) Connect the 6 injector connectors.
HINT:
The Nos.1, 3, 5 injector connectors and dark gray, and the
Nos.2, 4, 6 injector connectors are brown.
(d) Connect the camshaft timing oil control valve connector.
(e) Connect the camshaft position sensor connector.
(f) Connect the ECT sensor connector.

A09753
Transmission Control Rod
13 (130, 9)
13 (130, 9)
Rear Engine Mounting Member
Fuel Inlet
 Gasket
29 (300, 22)
13.5 (135, 10)25.5 (260, 19)
70 (714, 52)
Hole Plug PS Vane Pump Assembly
PS Pump Rear Stay57.9 (590, 43)
39.2 (400, 29)
65 (660, 48)
65 (660, 48)
35 (360, 26)
26 (265, 19)
52 (530, 38)
57.9 (590, 43)
A/C Compressor
52 (530, 38)
52 (530, 38)
Adjusting Washer
PS Gear Housing
Propeller Shaft
79 (805, 58)
37 (375, 27)
Heat Insulator
Heat Insulator
Adjusting Nut
69 (700, 51)
79 (805, 58)
44 (440, 32)
 Gasket Gasket
Ring
Ring
Center Exhaust Pipe
Front Floor Center Brace
 Gasket
Front Exhaust Pipe
(with Rear TWC)
44 (440, 32)
 Gasket
45 (450, 32)
Heated Oxygen Sensor
(Bank 2 Sensor 2)
44 (440, 32)
N´m (kgf´cm, ft´lbf) : Specified torque
 Non±reusable part
44 (440, 32)Pipe Support
Bracket
Hose
EM±60
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
1414 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

A02793
Ground Wire
Fuel Inlet Hose
Starter Wire
A02788
Ground Strap
Heater Hose
A02787
Clamp
A02785
A02786
± ENGINE MECHANICAL (2JZ±GE)ENGINE UNIT
EM±63
1417 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
12. DISCONNECT WIRES, CABLE, STRAP, CONNEC-
TORS, HOSES AND CLAMPS
(a) Disconnect the ground wire from the floor.
(b) Disconnect the starter wire from the terminal and manifold
stay.
(c) Disconnect the fuel inlet hose from the fuel pipe support.
(d) Disconnect the ground strap from the dash panel.
(e) Disconnect the heater hose from the heater pipe.
(f) Disconnect the heater hose from the water bypass pipe.
(g) Disconnect the EVAP hose from the pipe (from charcoal
canister).
(h) Disconnect the heater oxygen sensor (bank 1 sensor 1)
connector.
(i) Disconnect the heater oxygen sensor (bank 1 sensor 2)
connector.
(j) Disconnect the generator wire.
(k) Disconnect the engine wire clamp from the wire clip of
generator.
(l) Disconnect the ground cable from the bracket on the cyl-
inder block.
(m) Disconnect the igniter connector.
(n) Disconnect the DLC1.
(o) Disconnect the 2 engine wire clamps from the clamp
brackets.
13. DISCONNECT ENGINE WIRE FROM ECM BOX
(a) Remove the ECM hood and ECM cover.
(b) Disconnect the 3 ECM connectors.
(c) Disconnect the 4 wire harness connectors.
(d) Disconnect the 2 junction connectors.
(e) Disconnect the grommet and engine wire from the ECM
box.