Lexus RX300 (MCU15). Service manual - part 413

B05299

Battery

SST
(Wire)

B05331

–

ELECTRONIC FUEL INJECTION

INJECTOR

FI–23

LEXUS RX300   (RM785E)

(j)

If you have no hand–held tester, connect the positive (+)
and negative (–) leads from the battery to the fuel pump
connector (See page FI–5).

(k)

Connect SST (wire) to the injector and battery for 15 se-
conds, and measure the injection volume with a gra-
duated cylinder. Test each injector 2 or 3 times.
SST

09842–30070

Volume: 60 – 73 cm

3

 (3.7 – 4.5 cu in.) per 15 sec.

Difference between each injector:
13 cm

3

 (0.8 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 of SST
(wire) from the battery and check the fuel leakage from
the injector.
SST

09842–30070

Fuel drop: 1 drop or less per 12 minutes

(b)

Turn the ignition switch to LOCK.

(c)

Disconnect the negative (–) terminal cable from the bat-
tery.

(d)

Remove the SST and fuel tube connector.
SST

09268–41047, 09842–30070

CAUTION:

S

Perform disconnecting operations of the fuel tube
connector (quick type) after observing the precau-
tions.

S

As there is retained pressure in the fuel pipe line, pre-
vent it from splashing inside the engine compart-
ment.

(e)

Disconnect the hand–held tester from the DLC3.

FI0V0–01

B12948

New Insulator

New O–Ring

New Grommet

New

O–Ring

S04511

Turn

Connector

Push

S04510

Spacer

Spacer

B12949

S04728

Rotate

Outward

FI–24

–

ELECTRONIC FUEL INJECTION

INJECTOR

LEXUS RX300   (RM785E)

INSTALLATION

1.

INSTALL INJECTORS AND DELIVERY PIPES

(a)

Install new insulator and grommet to each injector.

(b)

Apply a light coat of spindle oil or gasoline to 2 new O–
rings and install them to each injector.

(c)

Apply a light coat of spindle oil or gasoline on the place
where a delivery pipe touches an O–ring of the injector.

(d)

While turning the injector clockwise and counterclock-
wise, push it to the delivery pipes. Install the 6 injectors.

(e)

Position the injector connector outward.

(f)

Place the 4 spacers in position on the intake manifold.

(g)

Apply a light coat of spindle oil or gasoline on the place
where a intake manifold touches an O–ring of the injector.

(h)

Place the delivery pipes and fuel pipe together with the 6
injectors in position on the intake manifold.

(i)

Temporarily install the 4 bolts holding the delivery pipes
to the intake manifold.

(j)

Temporarily install the bolt holding the fuel pipe to the in-
take manifold.

(k)

Check that the injectors rotate smoothly.

HINT:
If injectors do not rotate smoothly, the probable cause is incor-
rect installation of O–rings. Replace the O–rings.
(l)

Position the injector connector outward.

B12949

B12950

Align

B12944

B12940

Fuel
Hose
Clamp

B12951

–

ELECTRONIC FUEL INJECTION

INJECTOR

FI–25

LEXUS RX300   (RM785E)

(m)

Tighten the 4 bolts holding the delivery pipes to the intake
manifold.
Torque: 10 N·m (100 kgf·cm, 7 ft·lbf)

(n)

Tighten the bolt holding the fuel pipe to the intake man-
ifold.
Torque: 19.5 N·m (200 kgf·cm, 14 ft·lbf)

2.

CONNECT FUEL INLET PIPE

(a)

Align the alignment marks (white paint) on the fuel inlet
pipe.

(b)

Connect the fuel inlet pipe (fuel tube connector) to the fuel
filter.

CAUTION:
Perform connecting operations of the fuel tube connector
(quick type) after observing the precautions.

(c)

Install the fuel hose clamp to the fuel filter.

3.

INSTALL AIR ASSIST HOSES AND PIPE

(a)

Connect the air assist hoses to the intake manifold.

(b)

Install the air assist pipe to the bracket on the No. 1 fuel
pipe.

4.

CONNECT INJECTOR CONNECTORS

5.

INSTALL AIR INTAKE CHAMBER ASSEMBLY
(See page EM–60)

6.

INSTALL AIR CLEANER HOSE

7.

CHECK FOR FUEL LEAKS

FI0V1–01

B12175

Location of Fuel Tank Cushion

Fuel Sender 
Gauge

Fuel Inlet 
Pipe

Fuel Tank Cap

Shield

Ring

Fuel Inlet Hose

3.5 (36, 31 in.·lbf)

z

 Gasket

Fuel Sub–Suction Hose

Fuel Tank

Fuel Pump and 
Sender Gauge 
Assembly

Fuel Tank 
Main Tube

RH Fuel 
Tank Band

: Specified torque

39.2 (400, 29)

Fuel Tank 
Vent Tube 
Set Plate

Tube Joint Clip

LH Fuel Tank Band

z

 Gasket

LH Fuel Tank Protector

RH Fuel Tank Protector

Lower Center 
Fuel Tank Protector

z

 Gasket

Fuel Tank 
Breather Tube

Vapor Pressure Sensor

No.3 Fuel Tank protector

Vent Tube Set Plate

Fuel Cut 
Off Valve

z

 Gasket

EVAP Tube Support Plate
z

 Gasket

39.2 (400, 29)

x 5

Vent Tube Set Plate

z

 Gasket

Fuel Cut Off Valve

Clip

x 4

Ring

x 8

EVAP Hose

N·m (kgf·cm, ft·lbf)

z

 Non–reusable part

FI–26

–

ELECTRONIC FUEL INJECTION

FUEL TANK AND LINE

LEXUS RX300   (RM785E)

FUEL TANK AND LINE

COMPONENTS

CAUTION:

S

Always use new gaskets when replacing the fuel tank or component parts.

S

Apply the proper torque to all parts tightened.