torque LEXUS SC400 1991 Service Repair Manual

(g) Install the grommet and a new O±ring to the injector.
(h) Connect SST (hose) to the injector with SST (union),and hold the injector and union with SST (clamp).
SST 09268±41045
(i) Put the injector into the graduated cylinder.
HINT: Install a suitable vinyl hose onto the injector to prevent
gasoline from splashing out.
(j) Using SST, connect terminals +B and FP of the check (ºDIAGNOSISº) connector.
SST 09843±18020
(k) Reconnect the cable to negative (±) terminal of battery.
(l) Turn the ignition switch ON.
NOTICE: Do not start the engine.
(m) Connect SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with a
graduated cylinder. Test each injector two or three
times.
SST 09842±30070
Volume: 55±70 cc (3.4±4.3 cu in.) per 15 sec.
Difference between each injector:
10 cc (0.6 cu in.) or less
If the injection volume is not as specified, replace the injector.
2. INSPECT LEAKAGE (a) In the condition above, disconnect the test probes ofSST (wire) from the battery and check the fuel leakage
from the injector.
SST 09842±30070
Fuel drop: One drop or less per minute
(b) Disconnect the battery negative (±) cable.
(c) Remove SST.
SST 09268±41045 and 09843±18020
(d) Reconnect the fuel inlet hose to the fuel tube.
SST 09631±22020
Torque: 30 N Vm (310 kgf Vcm, 22 ft Vlbf)
HINT: Use a torque wrench with a fulerum length of 30 cm
(11.81 in.). FI±53
EFI SYSTEM
± Fuel System (Injectors)
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(f) Place the eight injectors and two delivery pipesassembly in position on the intake manifold.
(g) Temporarily install the c onnector bracket and four
mounting bolts.
(h) Check that the injectors rotate smoothly.
HINT: If injectors do not rotate smoothly, the probable cause
is incorrect installation of O±rings. Replace the O±rings.
(i) Position the injector connector outward.
(j) Tighten the four bolts holding the delivery pipes to the intake manifold.
Torque: 18 N Vm (185 kgf Vcm, 13 ft Vlbf)
2. INSTALL FUEL RETURN PIPE
(a) Temporarily install the return pipe with the bolt, two
gaskets and union bolt.
(b) Tighten the union bolt holding the return pipe to the pressure regulator.
Torque: 35 N Vm (360 kgf Vcm, 26 ft Vlbf)
(c) Tighten the bolt holding the return pipe to the LH cylinder
head.
3. TIGHTEN LOCK NUT ON FUEL PRESSURE REGULATOR
Torque: 29 N Vm (300 kgf Vcm, 22 ft Vlbf)
FI±55EFI SYSTEM ± Fuel System (Injectors)
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7. CONNECT FUEL RETURN HOSE TO FUEL RETURN PIPE
8. CONNECT FUEL INLET HOSE TO LH DELIVERY PIPE Using SST, connect the inlet hose with two new gaskets and
pulsation 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.).
9. INSTALL AIR INTAKE CHAMBER (See steps 2 to 18 on pages FI±35 to 41)
HINT: After the air intake chamber installed, tighten the bolt
holding to the EGR pipe to the RH cylinder head. FI±57
EFI SYSTEM
± Fuel System (Injectors)
WhereEverybodyKnowsYourName

INSTALLATION OF ACOUSTIC CONTROL
INDUCTION SYSTEM
(See Components on page FI±57)
1. INSTALL AIR INTAKE CHAMBER (a) Place a new gasket so the protrusion faces the intake
chamber.
(b) Install a new gasket to the intake manifold, and the intake chamber with the five bolts and two nuts.
Torque: 21 N Vm (210 kgf Vcm, 15 ft Vlbf)
(c) Connect the check connector and harness protector
with the two bolts to the air intake chamber.
(d) Install the six nuts and five bolts holding the intake air connector to the air intake chamber.
Torque: 18 N Vm (185 kgf Vcm, 13 ft Vlbf)
(e) Connect the following hoses:
(1) Vacuum hose to brake booster union
(2) Air hose (to charcoal canister)
(3) Vacuum hose from vacuum pipe
(4) Vacuum sensing hose
(5) Air hose (to PS air control valve)
2. INSTALL EGR PIPE (a) Install a gasket and the EGR pipe with the two bolts.
Torque: 21 N Vm (210 kgf Vcm, 15 ft Vlbf)
(b) Tighten the union nut.
Torque: 64 N Vm (650 kgf Vcm, 47 ft Vlbf)
±
EFI SYSTEMFI±61Air Induction System (Acoustic Control Induction System (ACIS)
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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)
WhereEverybodyKnowsYourName

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)
WhereEverybodyKnowsYourName

PRECAUTIONS
1. Always use new gaskets when replacing the fuel tank orcomponent part.
2. Apply the proper torque to all parts tightened.
INSPECTION OF FUEL LINES AND
CONNECTIONS
(a) Inspect the fuel lines and connections for cracks,
leakage or deformation.
(b) Inspect the fuel tank vapor vent system hoses and connections for looseness, kinks or damage.
(c) Inspect the fuel tank for deformation, cra cks, fuel
leakage or tank band looseness.
(d) Check the filter neck for damage or fuel leakage.
(e) Ho se an d tu b e c onnections are as shown in the
illustration.
If a problem is found, repair or replace the parts as necessary.
FI±62
EFI SYSTEM
± Fuel System (Fuel Tank and Lines)
WhereEverybodyKnowsYourName

4. REMOVE AIR FLOW METER FROM AIR CLEANER CASERemove the four bolts and air flow meter and gasket.
INSPECTION OF AIR FLOW METER
INSPECT AIR FLOW METERCheck that the honey±combed is neither deformed nor
damaged.
If necessary, replace the air flow meter.
INSTALLATION OF AIR FLOW METER
(See Components on page FI±64)
1. INSTALL AIR FLOW METER FROM AIR CLEANER CASE Install a new gasket and the air flow meter with the four bolts.
Torque: 10 N Vm (100 kgf Vcm, 7 ft Vlbf)
2. INSTALL AIR CLEANER CAP AND AIR FLOW METER
ASSEMBLY
(a) Connect the air cleaner case to the air duct.
(b) Connect the air flow meter to the air cleaner hose.
(c) Install the air cleaner and air flow meter assembly withthe four bolts.
(d) Tighten the hose clamp.
3. CONNECT AIR FLOW METER CONNECTOR (a) Connect the air flow meter connector.
(b) Install the wire clamp to the clamp bracket on the air flow
meter.
4. CONNECT CABLE FROM NEGATIVE TERMINAL OF BATTERY FI±65
EFI SYSTEM
± Air Induction System (Air Flow Meter)
WhereEverybodyKnowsYourName

INSTALLATION OF THROTTLE BODY
(See Components o page FI±69)
1. INSTALL THROTTLE BODY (a) Install the two water by±pass hoses and pipe to thethrottle body.
(b) Connect the following hoses: (1) PCV hose to throttle body
(2) Water by±pass hose to throttle body
(c) Install a new gasket and throttle body with the two bolts and two nuts.
Torque: 18 N Vm (185 kgf Vcm, 13 ft Vlbf)
HINT: Use bolts 40 mm (1.57 in.) in length.
(d) Install the water by±pass pipe (from rear water by±pass
joint) to the clamp on the engine wire cover.
(e) Connect the following hoses: (1) Water by±pass hose to the ISC valve
(2) (USA Spec.) Vacuum hose to throttle body
(3) (Exc. USA Spec.) Three vacuum hoses to throttle body FI±77
EFI SYSTEM
± Air Induction System (Throttle Body)
WhereEverybodyKnowsYourName

2. REMOVE KNOCK SENSOR(a) Disconnect the knock sensor connectors.
(b) Using SST, remove the two knock sensors.
SST 09816±30010
3. INSPECT KNOCK SENSOR Using an ohmmeter, check that there is no continuity be-
tween the terminal and body.
If there is continuity, replace the sensor.
4. REINSTALL KNOCK SENSOR (a) Using SST, remove the two knock sensors.
SST 09816±30010
Torque: 44 N Vm (450 kgf Vcm, 33 ft Vlbf)
(b) Connect the knock sensor connectors.
5. RECONNECT CABLE FROM NEGATIVE TERMINAL OF BATTERY
FI±70
±
EFI SYSTEM Electronic Control System (Knock Sensors)
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