engine LEXUS GS400 2000 Service Repair Manual

SF0N9±04
B01568
Sound Scope
B01569
B01570
Ohmmeter
± SFI (2JZ±GE)INJECTOR
SF±19
1485 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INJECTOR
ON±VEHICLE INSPECTION
1. REMOVE ENGINE COVER
Remove 4 nuts and engine cover.
2. INSPECT INJECTOR OPERATION
Check operation sound from each injector.
(1) With the engine running or cranking, use a sound
scope to check that there is normal operating noise
in proportion to engine speed.
(2) If you have no sound scope, you can check the in-
jector transmission operation with a screwdriver.
If no sound or an unusual sound is heard, check the wiring con-
nector, injector or injection signal from the ECM.
3. INSPECT INJECTOR RESISTANCE
(a) Disconnect the injector connectors.
(b) Using an ohmmeter, measure the resistance between the
terminals.
Resistance: 13.4 ± 14.2 W at 20°C (68°F)
If the resistance is not as specified, replace the injector.
(c) Reconnect the injector connectors.
4. REINSTALL ENGINE COVER
Reinstall the 4 engine cover with the 4 nuts.

SF151±01
B08999
N´m (kgf´cm, ft´lbf) : Specified torque

Non±reusable part
21 (210, 15)
21 (210, 15)
VSV Connector for EVAP
Camshaft Position Sensor Connector
No.2 Vacuum Pipe
Accelerator Cable
EVAP Hose
Noise Filter
Connector
Vacuum
Hose
Throttle Position
Sensor Connector

Gasket
PS Air Hose
Engine Wire Clamp

Gasket
Oil Dipstick and
Guide for A/T
Engine Wire
Clamp
42 (420, 31)
Fuel Pressure Pulsation Damper

Gasket

O±Ring
Fuel Inlet Pipe Delivery Pipe
21 (210, 15)
Spacer
Injector Connector
O±Ring
O±Ring
Injector

Insulator

Grommet
28 (280, 21)
Engine Cover
SF±20
± SFI (2JZ±GE)INJECTOR
1486 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
COMPONENTS

SF0NB±04
B01579
± SFI (2JZ±GE)INJECTOR
SF±21
1487 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE ENGINE COVER
Remove the 4 nuts and engine cover.
2. REMOVE AIR INTAKE CHAMBER (See page SF±46)
3. REMOVE FUEL PRESSURE PULSATION DAMPER
(See page SF±26)
4. REMOVE DELIVERY PIPE AND INJECTORS
NOTICE:

Be careful not to drop the injectors when removing
the delivery pipe.

Pay attention to put any hung load on the injector to
and from the side direction.
(a) Disconnect the 6 injector connectors.
(b) Disconnect the camshaft position sensor connector.
(c) Disconnect the throttle position sensor connector.
(d) Disconnect the VSV connector for EVAP.
(e) Remove the 3 bolts and delivery pipe together with the 6
injectors.
(f) Pull out the 6 injectors from the delivery pipe.
(g) Remove the O±rings, grommet and insulator from each
injector.
(h) Remove the 3 spacers from the intake manifold.

B01578
Injector SST
(Attachment) Fuse Tube
(On Vehicle)
SST
(Hose)
SST
(Adapter)
SST
(Clamp)
SF0NC±03
B01938
SST (Attachment)SST (Hose)
Disconnect
Fuel Inlet Hose
B01576
SST (Hose)
SST (Adapter)
SST
(Clamp)O±Ring
Vinyl Hose
B01982
LEXUS
Hand±Held
Tester SF±22
± SFI (2JZ±GE)INJECTOR
1488 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. INSPECT INJECTOR INJECTION
CAUTION:
Keep injector clear of sparks during the test.
(a) Remove the nut, and disconnect the fuel inlet hose from
the fuel main tube.
(b) Temporarily install SST (attachment) to the fuel main
tube.
SST 09268±41047 (09268±52011)
(c) Tighten the flare nut on the fuel main tube.
(See page SF±1)
(d) Connect SST (hose) to the SST (attachment).
SST 09268±41047
(e) Install the O±ring to the injector.
(f) Connect SST (hose) to the injector with SST (adapter),
and hold the injector and adapter with SST (clamp).
SST 09268±41047 (09268±41110, 09268±41300)
(g) Put the injector into the graduated cylinder.
CAUTION:
Install a suitable vinyl hose onto the injector to prevent
gasoline from splashing out.
(h) Connect the LEXUS hand±held tester to the DLC3.
(i) Connect the battery negative (±) terminal cable to the bat-
tery.
(j) Turn the ignition switch ON and LEXUS hand±held tester
main switch ON.
NOTICE:
Do not start the engine.
(k) Select the ACTIVE TEST mode on the LEXUS hand±held
tester.
(l) Please refer to the LEXUS hand±held tester operator's
manual for further details.
(m) If you have no LEXUS hand±held tester, connect the pos-
itive (+) and negative (±) leads from the battery to the fuel
pump connector. (See page SF±6)

SF0ND±04
B01220
New Insulator
New O±Ring
New Grommet New O±Ring
B01571
Turn
Outward
Connector
B01580
RotateUpward SF±24
± SFI (2JZ±GE)INJECTOR
1490 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
1. INSTALL INJECTORS AND DELIVERY PIPE
(a) Install new insulator and grommet to each injector.
(b) Apply a light coat of spindle oil or gasoline to 2 new O±
rings and install them to each injector.
(c) Apply a light coat of spindle oil or gasoline on the place
where a delivery pipe touches an O±ring of the injector.
(d) While turning the injector clockwise and counterclock-
wise, push it to the delivery pipe. Install the 6 injectors.
(e) Position the injector connector outward.
(f) Place the 3 spacers in position on the intake manifold.
(g) Apply a light coat of spindle oil or gasoline on the place
where a intake manifold touches an O±ring of the injector.
(h) Place the 6 injectors together with the delivery pipe and
3 bolts in position on the intake manifold.
(i) Temporarily install the 3 bolts holding the delivery pipe to
the intake manifold.
(j) Check that the injectors rotate smoothly.
HINT:
If injectors do not rotate smoothly, the probable cause is incor-
rect installation of O±rings. Replace the O±rings.
(k) Position the injector connector upward.
(l) 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.
(m) Tighten the 3 bolts holding the delivery pipe to the intake
manifold.
Torque: 21 N´m (210 kgf´cm, 15 ft´lbf)
(n) Connect the camshaft position sensor connector.
(o) Connect the throttle position sensor connector.
(p) Connect the VSV connector for EVAP.
2. INSTALL FUEL PRESSURE PULSATION DAMPER
(See page SF±27)
3. INSTALL AIR INTAKE CHAMBER
(See page SF±49)
4. INSTALL ENGINE COVER
Install the engine cover with the 4 nuts.

SF0NE±05
B08978
N´m (kgf´cm, ft´lbf) : Specified torque

Non±reusable partVSV Connector for EVAP
Cover
EVAP Hose
EVAP Pipe
32 .5 (325, 24)
Fuel Pressure
Pulsation Damper
Vacuum Hose

Gasket
Fuel Inlet Pipe
No.2 Vacuum Pipe
Engine Cover
± SFI (2JZ±GE)FUEL PRESSURE PULSATION DAMPER
SF±25
1491 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
FUEL PRESSURE PULSATION DAMPER
COMPONENTS

SF0NF±03
B09504
B01582
B09505
SST
SF±26
± SFI (2JZ±GE)FUEL PRESSURE PULSATION DAMPER
1492 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE ENGINE COVER
Remove the 4 nuts and engine cover.
2. DISCONNECT CONNECTOR AND HOSES
(a) Disconnect the VSV connector for the EVAP.
(b) Disconnect the EVAP hose from the EVAP pipe.
(c) Disconnect the vacuum hose (from No.2 vacuum pipe)
from the air intake chamber.
3. REMOVE FUEL PRESSURE PULSATION DAMPER
(a) Remove the nut holding the No.2 vacuum pipe to the in-
take manifold.
(b) Remove the bolt holding the fuel inlet pipe to the intake
manifold.
(c) Using SST, remove the pulsation damper and 2 gaskets.
SST 09612±24014 (09617±24011)
CAUTION:

Put a shop towel under the delivery pipe.

Slowly loosen the pulsation damper.

SF0NG±04
B02000
New Gasket
(Large)
(Small)
New Gasket
B01582
B09504
± SFI (2JZ±GE)FUEL PRESSURE PULSATION DAMPER
SF±27
1493 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
1. INSTALL FUEL PRESSURE PULSATION DAMPER
(a) Install the fuel inlet pipe and pulsation damper with 2 new
gaskets.
HINT:
Different the gaskets are used for the upper (large side) and
lower (small side).
(b) Using SST, tighten the pulsation damper.
SST 09612 ± 24014 (09617 ± 24011)
Torque: 32.5 N´m (325 kgf´cm, 24 ft´lbf)
(c) Install the bolt holding the fuel inlet pipe to the intake man-
ifold.
Torque: 9.0 N´m (90 kgf´cm, 80 in.´lbf)
(d) Install the nut holding the No. 2 vacuum pipe to the intake
manifold.
Torque: 21 N´m (210 kgf´cm, 15 ft´lbf)
2. CONNECT CONNECTOR AND HOSES
(a) Connect the vacuum hose (from No.2 vacuum pipe) to the
air intake chamber.
(b) Connect the EVAP hose to the EVAP pipe.
(c) Connect the VSV connector for the EVAP.
3. INSTALL ENGINE COVER
Install the engine cover with the 4 nuts.

SF0NL±05
B09506
B01608
B01982
LEXUS
Hand±Held
Tester SF±32
± SFI (2JZ±GE)THROTTLE BODY
1498 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
THROTTLE BODY
ON±VEHICLE INSPECTION
1. REMOVE ENGINE COVER
Remove the 4 nuts and engine cover.
2. INSPECT SYSTEM OPERATION
(a) Check that the throttle linkage moves smoothly.
(b) Inspect the throttle control motor for operating sound.
(1) Turn the ignition switch ON.
(2) When turning the accelerator pedal position sensor
lever, check the running sound of the motor. Also,
check that there is no friction sound.
If operation is not as specified, check the throttle control motor,
wiring and ECM.
(c) Inspect the throttle position sensor and accelerator pedal
position sensor function.
(1) Connect the LEXUS hand±held tester to the DLC3.
(2) When turning the accelerator pedal position sensor
lever to the full±open position, check that the
throttle valve opening percentage (THROTTLE
POS) of the CURRENT DATA showns the standard
value.
Throttle valve opening percentage: 60 % or more
If operation is not as specified, check that the throttle position
sensor, accelerator pedal position sensor, wiring and ECM.
(d) Start the engine, and check that the Malfunction Indicator
Lamp (MIL) does not light up.
(e) Inspect the air assist system.
(1) Allow the engine to warm up to normal operating
temperature.

B09507
B01620
Ohmmeter3 (CL±)
4 (CL+)
1 (M+)
2 (M±)
B01942VCOhmmeter
E2
B01943
VC Ohmmeter
E2
± SFI (2JZ±GE)THROTTLE BODY
SF±33
1499 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(2) Turn the A/C switch ON and OFF, and check the idle
speed.
Idle speed (Transmission in neutral):
700 ± 50 rpm (A/C OFF)
750 ± 50 rpm (A/C ON)
NOTICE:
Perform inspection under condition without electrical load.
(3) With engine idling, pinch the air assist hose and
check that engine speed drops, and then returns
back up to idle speed.
If operation is not as specified, check the throttle body, wiring
and ECM.
(f) After checking the above (b) to (e), perform the diving test
and check that there is no sense of incongruity.
3. INSPECT THROTTLE CONTROL MOTOR
(a) Disconnect the throttle control motor connector.
(b) Using an ohmmeter, measure the resistance between ter-
minal 3 (CL±) and 4 (CL+).
Resistance: 4.2 ± 5.2 W at 20°C (68°F)
(c) Using an ohmmeter, measure the resistance between ter-
minal 1 (M+) and 2 (M±).
Resistance: 0.3 ± 100 W at 20°C (68°F)
If the resistance is not as specified, replace the throttle control
motor. (See page SF±37)
(d) Reconnect the throttle control motor connector.
4. INSPECT THROTTLE POSITION SENSOR
(a) Disconnect the throttle position sensor connector.
(b) Using an ohmmeter, measure the resistance between ter-
minals VC and E2.
Resistance: 1.2 ± 3.2 kW at 20°C (68°F)
If the resistance is not as specified, replace the throttle position
sensor. (See page SF±37)
(c) Reconnect the throttle position sensor connector.
5. INSPECT ACCELERATOR PEDAL POSITION SEN-
SOR
(a) Disconnect the accelerator pedal position sensor con-
nector.
(b) Using an ohmmeter, measure the resistance between ter-
minals VC and E2.
Resistance: 1.2 ± 3.2 kW at 20°C (68°F)
If the resistance is not as specified, replace the accelerator ped-
al position sensor. (See page SF±37)