1991 LEXUS SC400 VSV

3. INSTALL NO.2 VACUUM PIPEInstall the vacuum pipe with the two nuts.
Torque: 21 N Vm (210 kgf Vcm, 15 ft Vlbf)
4. INSTALL OIL DIPSTICK FOR ENGINE
5. INSTALL VACUUM TANK AND VSV
(a) Install the VSV with the screw on the vacuum tank.
Torque: 8.8 N Vm (90 kgf Vcm, 78 in. Vlbf)
(b) Install the vacuum hose.
6. INSTALL VACUUM CONTROL VALVE SET (a) Install the vacuum control valve set with the two nuts.
Torque: 21 N Vm (210 kgf Vcm, 15 ft Vlbf)
(b) Connect the following hoses:
(1) Vacuum hose to VSV
(2) Vacuum hose to vacuum pipe
(c) Connect the connector to the VSV.
7. (A/T) INSTALL DIPSTICK GUIDE FOR TRANSMISSION
(a) Install a new O±ring on the dipstick guide.
(b) Apply soapy on the O±ring.
(c) Connect the dipstick guide end to the tube of the oil pan,
and install the dipstick guide with the bolt.
(d) Install the dipstick.
8. CONNECT CABLE TO NEGATIVE TERMINAL OF BATTERY
FI±62
±
EFI SYSTEM
Air Induction System (Acoustic Control Induction System (ACIS)
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INSTALLATION OF FUEL PRESSURE
PULSATION DAMPER
(See Components on page FI±58)
1. INSTALL FUEL PRESSURE PULSATION DAMPER Using SST, install two new gaskets, the inlet hose and pulsa-
tion damper.
SST 09612±24014 (09617±24011)
Torque: 39 N Vm (400 kgf Vcm, 29 ft Vlbf)
33 N Vm (340 kgf Vcm, 24 ft Vlbf) for SST
HINT: Use a torque wrench with a fulcrum length of 30 cm
(11.81 in.)
2. INSTALL LH ENGINE WIRE COVER
(a) Connect portions A and B engine wire cover to the wirebrackets.
(b) Set the VSV (for fuel pressure control system) wire in original position.
(c) Fit portions C and D of the engine wire cover, matching them with the lower high±tension cord cover and No.3
timing belt cover.
(d) Install the engine wire cover with the two bolts.
3. INSTALL UPPER HIGH±TENSION CORD COVER (a) Fit portion A of the upper high±tension cover, matching
it with the top of the lower high±tension cord cover.
(b) Push the front side of the high±tension cord cover, and connect the front side claw groove of the upper
high±tension cord cover to the claw of the lower
high±tension cord cover.
(c) Install the upper high±tension cord cover with the two bolts.
4. CONNECT CABLE TO NEGATIVE TERMINAL OF BATTERY
5. CHECK FOR FUEL LEAKS (See page FI±16)
FI±60
EFI SYSTEM
± Fuel System (Fuel Pressure Pulsation Damper)
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VSV for EVAP
INSPECTION OF VSV FOR EVAP
(See Emission Control System on page EC±8)
VSV for EGR
INSPECTION OF VSV FOR EGR
(See Emission Control Systems on page EC±13)
VSV for ACIS
INSPECTION OF VSV FOR ACIS
(See page FI±60)
±
EFI SYSTEM Electronic Control System (VSV for EVAP)
(VSV for EGR) (VSV for ACIS)FI±65
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COMPONENTS
REMOVAL OF ISC VALVE
1. REMOVE LOWER HIGH±TENSION CORD COVER(See steps 1, 2 and 5 to 12 on pages FI±27 to 29)
2. REMOVE ISC VALVE
(a) Disconnect the ISC valve connector.
(b) (USA Spec.)Remove the bolt holding the water by±pass pipe (be-
tween ISC valve and EGR valve) to the air intake cham-
ber.
(c) (Exc. USA Spec.) Remove the bolt holding the water by±pass pipe (be-
tween ISC valve and EGR valve) to the VSV (for fuel
pressure control). FI±81
EFI SYSTEM
± Air Induction System (Idle Speed Control (ISC) Valve)
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INSTALLATION OF ISC VALVE
(See Components on page FI±81)
1. INSTALL ISC VALVE (a) Install a new gasket and the ISC valve with the two nuts.
Torque: 18 N Vm (185 kgf Vcm, 13 ft Vlbf)
(b) Connect the following hoses to the ISC valve:
(1) Water by±pass hose (from throttle valve)
(2) Water by±pass hose (from water inlet housing)
(3) Water by±pass hose (from EGR valve)
(c) (USA Spec.) Install the vacuum pipe and water by±pass pipe (be-
tween ISC valve and EGR valve) to the air intake cham-
ber with the bolt.
(d) (Exc. USA Spec.) Install the water by±pass pipe (between ISC valve and
EGR valve) to the VSV (for fuel pressure control) with
the bolt.
(e) Connect the ISC valve connector.
1. INSTALL LOWER HIGH±TENSION CORD COVER (See steps 5 to 13 and 16 to 18 on pages FI±39 to 41)FI±83
EFI SYSTEM
± Air Induction System (Idle Speed Control (ISC) Valve)
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VSV for Fuel Pressure Control
FI±90 ± Electronic Control System (VSV for Fue\
l Pressure Control)EFI SYSTEM
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COMPONENTS FOR REMOVAL AND INSTALLATION
FI±91EFI SYSTEM ± Electronic Control System (VSV for Fuel Pressure Control)
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INSPECTION OF VSV FOR FUEL
PRESSURE CONTROL
1. DISCONNECT CABLE FROM NEGATIVE TERMINAL OFBATTERY
CAUTION: Work must be started after approx. 20 se-
conds or longer from the time the ignition switch is
turned to the ºLOCKº position and the negative (±) termi-
nal cable is disconnected from the battery.
2. REMOVE VSV (a) Disconnect the VSV connector.
(b) Disconnect the following hoses from VSV:(1) Vacuum hose (from fuel pressure regulator)
(2) Vacuum hose (from air intake chamber)
(c) (Exc. USA Spec.) Remove the bolt holding the water by±pass pipe to the
VSV.
(d) Remove the bolt and VSV.
FI±92
EFI SYSTEM
± Electronic Control System (VSV for Fuel Pressure Control)
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