2000 LEXUS GS400 Service Repair Manual

SF0NU±02
B08998
N´m (kgf´cm, ft´lbf) : Specified torque

Non±reusable part
21 (210, 15)
21 (210, 15)
Accelerator Cable Clamp EVAP Hose
Clamp Air Intake Chamber
(with Intake Air Control Valve)
Vacuum Hose (from
No.2 Vacuum Pipe)
Vacuum Hose

Gasket
Bracket and Noise Filter
PS Air Hose
Noise Filter
Connector
Engine Wire Clamp
Gasket
VSVVacuum Control Valve Set
Engine Wire Clamp
Vacuum Tank
Vacuum Hose
VSV Connector
Oil Dipstick and Guide for A/T
O±Ring
28 (280, 21)
Engine Cover
± SFI (2JZ±GE)ACOUSTIC CONTROL INDUCTION SYSTEM (ACIS)
SF±45
1511 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
COMPONENTS

SF0NV±03
B01629
B01631
(f)
(g)(e)
B09508
B09509
SF±46
± SFI (2JZ±GE)ACOUSTIC CONTROL INDUCTION SYSTEM (ACIS)
1512 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE ENGINE COVER
Remove the engine cover and 4 nuts.
2. REMOVE OIL DIPSTICK AND GUIDE FOR A/T
(See page EM±62)
3. REMOVE AIR INTAKE CHAMBER (WITH INTAKE AIR
CONTROL VALVE)
(a) Disconnect the noise filter connector.
(b) Disconnect the engine wire clamp from the bracket.
(c) Remove the bolt, bracket and noise filter.
(d) Remove the 4 bolts and 2 nuts holding the intake air con-
nector to the air intake chamber,
Torque: 28 N´m (280 kgf´cm, 21 ft´lbf)
(e) Disconnect the PS air hose from the air intake chamber.
(f) Disconnect the vacuum hose (from No.2 vacuum pipe)
from the air intake chamber.
(g) Disconnect the vacuum hose (from actuator for ACIS)
from the No.1 vacuum pipe.
(h) Disconnect the accelerator cable, and remove the bolt
and accelerator cable clamp.
(i) Disconnect the EVAP hose, and remove the bolt and
clamp.
(j) Remove the 5 bolts, 2 nuts, air intake chamber and 2 gas-
kets.
Torque: 28 N´m (280 kgf´cm, 21 ft´lbf)
4. REMOVE VACUUM CONTROL VALVE SET
(See page SF±54)

B01585
A
± SFI (2JZ±GE)ACOUSTIC CONTROL INDUCTION SYSTEM (ACIS)
SF±47
1513 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
5. REMOVE VSV FROM VACUUM TANK
(a) Disconnect the vacuum hose from port A of the vacuum
tank.
(b) Remove the screw and VSV.

SF0NW±01
P10938
Close
Vacuum
P11994
Adjusting Screw
Vacuum
B01586
ABAB
AirAir
B01587
Vacuum AB
SF±48
± SFI (2JZ±GE)ACOUSTIC CONTROL INDUCTION SYSTEM (ACIS)
1514 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. INSPECT INTAKE AIR CONTROL VALVE
(a) With 53.3 kPa (400 mmHg, 15.75 in.Hg) of vacuum ap-
plied to the actuator, check that the actuator rod moves.
If operation is not as specified, turn the adjusting screw.
(b) 1 minute after applying the vacuum in (a), check that the
actuator rod does not return.
2. INSPECT VACUUM TANK
(a) Check that air flows from ports A to B.
(b) Check that air does not flow ports B to A.
(c) Plug port B with your finger, and apply 53.3 kPa (400
mmHg, 15.75 in.Hg) of vacuum to port A, and check that
there is no change in vacuum after 1 minute.
If operation is not as specified, replace the vacuum tank.
3. INSPECT VSV (See page SF±54)

SF0NX±01
± SFI (2JZ±GE)ACOUSTIC CONTROL INDUCTION SYSTEM (ACIS)
SF±49
1515 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
Installation is in the reverse order of removal. (See page SF±46)

B01374
EFI Main
Relay
SF0NY±01
A00968
Ohmmeter
No Continuity5 Ohmmeter
Continuity
32
1
A00969
5 Ohmmeter
Continuity32 1
Battery SF±50
± SFI (2JZ±GE)EFI MAIN RELAY
1516 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
EFI MAIN RELAY
INSPECTION
1. REMOVE RELAY BOX COVER
2. REMOVE EFI MAIN RELAY (Marking:EFI)
3. INSPECT EFI MAIN RELAY
(a) Inspect the relay continuity.
(1) Using an ohmmeter, check that there is continuity
between terminals 1 and 2.
If there is no continuity, replace the relay.
(2) Check that there is no continuity between terminals
3 and 5.
If there is continuity, replace the relay.
(b) Inspect the relay operation.
(1) Apply battery positive voltage across terminals 1
and 2.
(2) Using an ohmmeter, check that there is continuity
between terminals 3 and 5.
If there is no continuity, replace the relay.
4. REINSTALL EFI MAIN RELAY
5. REINSTALL RELAY BOX COVER

SF0NZ±03
B08977
VSV Connector
VSV
EVAP Hose
EVAP HoseEngine Cover
± SFI (2JZ±GE)VSV FOR EVAPORATIVE EMISSION (EVAP)
SF±51
1517 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
VSV FOR EVAPORATIVE EMISSION (EVAP)
COMPONENTS

SF0O0±04
B01604
Ohmmeter
Continuity
B01605
No ContinuityOhmmeter
B01606
Air
B01607
Air
Battery SF±52
± SFI (2JZ±GE)VSV FOR EVAPORATIVE EMISSION (EVAP)
1518 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. REMOVE ENGINE COVER
Remove the 4 nuts and engine cover.
2. REMOVE VSV
3. INSPECT VSV
(a) Inspect the VSV for open circuit.
Using an ohmmeter, check that there is continuity be-
tween the terminals.
Resistance: 27 ± 33 W at 20°C (68°F)
If there is no continuity, replace the VSV.
(b) Inspect the VSV for ground.
Using an ohmmeter, check that there is no continuity be-
tween each terminal and the body.
If there is continuity, replace the VSV.
(c) Inspect the VSV operation.
(1) Check that air does not flows from the ports.
(2) Apply battery positive voltage across the terminals.
(3) Check that air flows from the ports.
If operation is not specified, replace the VSV.
4. REINSTALL VSV
5. REINSTALL ENGINE COVER
Reinstall the engine cover with the 4 nuts.