Lexus RX300 (MCU15). Service manual — part 411

FI0UT–01

B12939

Fuel

Tube

Fuel Tank Vent Tube
Set Plate

Fuel Pump Assembly

z

Gasket

X8

Clip

Outlet

4 (40,35 in.·lbf)

Fuel Pump & Sender
Gauge Connector

Floor Service Hole cover

Rear Seat Cushion

Fuel Filter

No.2 Fuel Suction Support

: Specified torque

z

Non–reusable part

N·m (kgf·cm, ft·lbf)

Fuel Suction
Plate with
Sender Gauge

Fuel Pressure
Regulator

Fuel
Pump

z

O–Ring

–

ELECTRONIC FUEL INJECTION

FUEL PRESSURE REGULATOR

FI–15

LEXUS RX300 (RM785E)

FUEL PRESSURE REGULATOR

COMPONENTS

FI0UU–01

B04948

Fuel
Pressure
Regulator

FI–16

–

ELECTRONIC FUEL INJECTION

FUEL PRESSURE REGULATOR

LEXUS RX300 (RM785E)

REMOVAL

1.

REMOVE FUEL PUMP ASSEMBLY FROM FUEL TANK
(See page FI–11)

2.

REMOVE NO. 2 FUEL SUCTION SUPPORT
(See page FI–11)

3.

REMOVE FUEL PRESSURE REGULATOR

(a)

Pull out the fuel pressure regulator.

(b)

Remove the O–ring from the fuel pressure regulator.

FI0UV–01

B00344

New O–Ring

–

ELECTRONIC FUEL INJECTION

FUEL PRESSURE REGULATOR

FI–17

LEXUS RX300 (RM785E)

INSTALLATION

1.

INSTALL FUEL PRESSURE REGULATOR

(a)

Install the O–ring to the fuel pressure regulator.

HINT:
Apply a light coat of gasoline to a new O–ring, and install it to
the fuel pressure regulator.
(b)

Connect the fuel pressure regulator from the fuel filter.

2.

INSTALL NO. 2 FUEL SUCTION SUPPORT
(See page FI–13)

3.

INSTALL FUEL PUMP ASSEMBLY FROM FUEL TANK
(See page FI–13)

A05071

5 mm
Hexagon
Wrench

FI0UW–01

B05296

Sound Scope

B05297

Ohmmeter

FI–18

–

ELECTRONIC FUEL INJECTION

INJECTOR

LEXUS RX300 (RM785E)

INJECTOR

ON–VEHICLE INSPECTION

1.

REMOVE V–BANK COVER

(a)

Using a 5 mm hexagon wrench, remove the 2 cap nuts.

(b)

Disconnect the 2 clips, and remove the V–bank cover.

2.

INSPECT INJECTOR OPERATION

Check operation sound from each injector.

(1)

With the engine running or cranking, use a sound
scope to check that there is normal operating noise
in proportion to engine speed.

(2)

If you have no sound scope, you can check the in-
jector operating vibration with your finger.

If no sound or unusual sound is heard, check the wiring connec-
tor, injector or injection signal from the engine ECU.

3.

INSPECT INJECTOR RESISTANCE

(a)

Disconnect the injector connector.

(b)

Using an ohmmeter, measure the resistance between the
terminals.
Resistance: 13.4 – 14.2 Ω at 20°C (68°F)

If the resistance is not as specified, replace the injector.
(c)

Reconnect the injector connector.

4.

REINSTALL V–BANK COVER

HINT:
For fixing the V–bank cover, push on the cover until a ”click” is
felt.