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SF-1
SFI (2UZ-FE) - SFI SYSTEM
SFI SYSTEM SF1XD-02
PRECAUTION
HINT:
All DTCs retained in the ECM will be erased when the negative
(-) terminal cable is removed from the battery.
If necessary, read the DTC before removing the negative (-)
terminal cable from the battery.
1. BEFORE WORKING ON FUEL SYSTEM, DISCON -
NECT CABLE FROM NEGATIVE (-) BATTERY TERMI-
NAL
2. DO NOT SMOKE OR WORK NEAR AN OPEN FLAME
WHEN WORKING ON FUEL SYSTEM
3. KEEP GASOLINE AWAY FROM RUBBER OR LEA TH-
ER PARTS
4. MAINTENANCE PRECAUTIONS
(a) To prevent engine misfire, these precautions should be
taken.
(1) Check the battery terminals are proper connected.
(2) After repair, check that the ignition coil terminals
and all other ignition system lines are reconnected
securely.
(3) When cleaning the engine compartment, be espe-
cially careful to protect the electrical system from
water.
(b) Observe the following when handling the air fuel ratio
sensors and oxygen sensor.
(1) Do not drop the sensor or hit it against another ob-
ject.
(2) The sensor should be free from any contact with wa-
ter.
5. IF VEHICLE IS EQUIPPED WITH MOBILE RA-
DIO SYSTEM (HAM, CB, ETC.)
If the vehicle is equipped with a mobile communication system,
refer to the precaution in the IN section.
6. AIR INDUCTION SYSTEM
(a) Removal of the engine oil dipstick, oil filler cap, PCV hose,
may break the engine.
(b) Disconnection, looseness or cracks in the parts of the air
induction system between the throttle body and cylinder
head may result in air suction and break the engine.
7. ELECTRONIC CONTROL SYSTEM
(a) Before removing SFI wiring connectors, terminals, first
disconnect the power by turning the ignition switch off or
disconnecting the negative (-) terminal cable from the
battery.
HINT:
Be sure to check DTCs before disconnecting the negative (-)
terminal cable from the battery.
SF-2
SFI (2UZ-FE) - SFI SYSTEM
(b) When installing the battery, be especially careful to cor-
rectly connect the positive (+) and negative (-) cables.
(c) Do not give a severe impact to the SFI parts during remov-
al or installation. Handle all SFI parts carefully, especially
the ECM.
(d) Be careful during troubleshooting. Numerous transistor
circuits are used and even slight terminal contact can
cause further trouble.
(e) Do not open the ECM cover.
(f) When inspecting during rainy weather, take care to pre-
vent entry of water. Also, when washing the engine
compartment, prevent water from getting into the SFI
parts and wiring connectors.
(g) Parts should be replaced as an assembly.
(h) Care should be taken when pulling out and inserting wir-
ing connectors.
(1) Release the lock and pull out the connector, pulling
on the connectors.
(2) Fully insert the connector and check that it is locked.
(i) Use SST for inspection or test of the injector or its wiring
connector.
SST 09842-30070
SST 8. FUEL SYSTEM
(a) When disconnecting the high fuel pressure line, a large
amount of gasoline will spill out. Observe the following
procedures:
(1) Disconnect the circuit opening relay.
FI2553 (2) Start the engine. After the engine has stopped on
its own, turn the ignition switch off.
(3) Put a container under the connecting part of the
pressure line.
(4) Slowly loosen the connection.
(5) Disconnect the high fuel pressure line.
(6) Reconnect the fuel pump connector.
(b) When connecting the union bolt (fuel pressure pulsation
damper) on the high pressure pipe union, observe the fol-
lowing procedures:
(1) Always use 2 new gaskets.
(2) Tighten the union bolt by hand.
New Gasket
B16498
SF-3
SFI (2UZ-FE) - SFI SYSTEM
(3) Using SST, tighten the union bolt to the specified
Fulcrum torque.
Length SST 09612-24014 (09617-24011)
30 cm
Torque:
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