Lexus ES300 (1997 year). Manual — part 517

FI2553

SST

S04600

Fuel
Pump
Connector

S05039

Plug

SF–2

–

SFI

SFI SYSTEM

853

1997 LEXUS ES300 (RM511U)

(b)

When installing the battery, be especially careful not to in-
correctly connect the positive (+) and negative (–) cables.

(c)

Do not permit parts to receive a severe impact during re-
moval or installation. Handle all SFI parts carefully, espe-
cially the ECM.

(d)

Be careful during troubleshooting as there are numerous
transistor circuit, and even slight terminal contact can
cause further troubles.

(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 on 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

8.

FUEL SYSTEM

(a)

When disconnecting the high fuel pressure line, a large
amount of gasoline will spill out, so observe these proce-
dures:
(1)

Disconnect the fuel pump connector.

(2)

Start the engine. After the engine has stopped on
its own, turn the ignition switch to LOCK.

(3)

Put a container under the connection.

(4)

Slowly loosen the connection.

(5)

Disconnect the connection.

(6)

Plug the connection with a rubber plug.

S05054

New Gasket

FI1654

SST

Fulcrum Length

30 cm

FI6372

New O–Ring

CORRECT

Grommet

Delivery Pipe

Injector

WRONG

P01072

O–ring

O–ring

Spacer

Grommet

Grommet

Delivery Pipe

–

SFI

SFI SYSTEM

SF–3

854

1997 LEXUS ES300 (RM511U)

(b)

When connecting the flare nut or union bolt on the high
pressure pipe union, observe these procedures:
(1)

(Union Bolt Type)
Always use 2 new gaskets.

(2)

(Union Bolt Type)
Tighten the union bolt by hand.

(3)

(Union Bolt Type)
Tighten the union bolt to the specified torque.

Torque: 32.5 N·m (330 kgf·cm, 24 ft·lbf)

(4)

(Flare Nut Type)
Apply a light coat of engine oil to the flare nut, and
tighten the flare nut by hand.

(5)

(Flare Nut Type)
Using SST, tighten the flare nut to specified torque.

SST

09631–22020

NOTICE:
Do not rotate the fuel pipe, when tightening the flare nut.

Torque: 28 N·m (285 kgf·cm, 21 ft·lbf) for using SST

HINT:
Use a torque wrench with a fulcrum length of 30 cm (11.81 in.).
(c)

Observe these precautions when removing and installing
the injectors.
(1)

Never reuse the O–ring.

(2)

When placing a new O–ring on the injector, take
care not to damage it in any way.

(3)

Coat a new O–ring with spindle oil or gasoline be-
fore installing–never use engine, gear or brake oil.

(d)

Install the injector to the delivery pipe and intake manifold,
as shown in the illustration.
Before installing the injector, must apply spindle oil or gas-
oline on the place where a delivery pipe or an intake man-
ifold touches an O–ring of the injector.

(e)

Observe these precautions when disconnecting the fuel
tube connector (quick type).
(1)

Check if there is any dirt like mud on the pipe and
around the connector before disconnecting them
and clean the dirt away.

(2)

Be sure to disconnect with hands.

S04583

S05040

Vinyl Bag

S05382

Retainer

S05050

Click Sound

SF–4

–

SFI

SFI SYSTEM

855

1997 LEXUS ES300 (RM511U)

(3)

When the connector and the pipe are stuck, pinch
the retainer between the hands, push and pull the
connector to free to disconnect and pull it out. Do
not use any tool at this time.

(4)

Inspect if there is any dirt or the likes on the seal sur-
face of the disconnected pipe and clean it away.

(5)

Prevent the disconnected pipe and connector from
damaging and mixing foreign objects by covering
them with a vinyl bag.

(f)

Observe these precautions when disconnecting the fuel
tube connector (quick type).
(1)

Do not reuse the retainer removed from the pipe.

(2)

Must use hands without using tools when to remove
the retainer from the pipe.

(3)

Check if there is any damage or foreign objects on
the connected part of the pipe.

(4)

Match the axis of the connector with axis of the pipe,
and push in the connector until retainer makes a
”click” sound. In case that the connections is tight,
apply little amount of new engine oil on the tip of the
pipe.

(5)

After having finished the connection, check if the
pipe and the connector are securely connected by
pulling them.

(6)

Check if there is any fuel leakage.

(g)

Observe these precautions when handling nylon tube.
(1)

Pay attention not to turn the connected part of the
nylon tube and the quick connector with force when
connecting them.

(2)

Pay attention not to kink the nylon tube.

(3)

Do not remove the EPDM protector on the outside
of the nylon tube.

(4)

Must not close the piping with the nylon tube by
bending it.

S05456

LEXUS

Hand–Held Tester

–

SFI

SFI SYSTEM

SF–5

856

1997 LEXUS ES300 (RM511U)

(h)

Check that there are no fuel leaks after doing mainte-
nance anywhere on the fuel system.
(1)

Connect the LEXUS hand–held tester to the DLC3.

(2)

Turn the ignition switch ON and push LEXUS hand–
held tester main switch ON.

NOTICE:
Do not start the engine.

(3)

Select the active test mode on the LEXUS hand–
held tester.

(4)

Please refer to the LEXUS hand–held tester opera-
tor’s manual for further details.

(5)

If you have no LEXUS hand–held tester, connect
the positive (+) and negative (–) leads from the bat-
tery to the fuel pump connector.
(See page

SF–6

)

(6)

Check that there are no leaks from any part of the
fuel system.

(7)

Turn the ignition switch to LOCK.

(8)

Disconnect the LEXUS hand–held tester from the
DLC3.