Lexus RX300 (MCU15). Service manual - part 412

FI0UX–01

B12945

PS Pressure Tube

19.5 (200, 14)

39 (400, 19)

Throttle Position
Sensor Connector

Accelerator Cable

ISC Valve
Connector

Water Bypass Hose

Vacuum
Hose

z

 Gasket

PCV Hose

Air Intake Chamber
Assembly

43 (440, 32)

Air Intake Chamber Stay

No.1 Engine
Hanger

Ground Cable

Ground Cable

Ground Strap

No.1 VSV Connector for ASIC

Purge Hose

Air Assist Hose and Pipe

19.5 (200, 14)

Injector Connector

Delivery Pipe

10 (100, 7)

Spacer

z

 O–Ring

z

 Grommet

z

 Grommet

z

 O–Ring

N·m (kgf·cm, ft·lbf)

: Specified

z

Non–reusable part

V–Bank Cover

Brake Booster
Vacuum Hose

Injector

Fuel Hose Clamp

–

ELECTRONIC FUEL INJECTION

INJECTOR

FI–19

LEXUS RX300   (RM785E)

COMPONENTS

FI0UY–01

S04505

B12951

B08887

B12941

FI–20

–

ELECTRONIC FUEL INJECTION

INJECTOR

LEXUS RX300   (RM785E)

REMOVAL

1.

REMOVE AIR CLEANER HOSE

2.

REMOVE AIR INTAKE CHAMBER ASSEMBLY
(See page EM–33)

3.

DISCONNECT INJECTOR CONNECTORS

4.

REMOVE AIR ASSIST HOSES AND PIPE

(a)

Disconnect the air assist pipe from the bracket on the
No.1 fuel pipe.

(b)

Remove the air assist hoses from the intake manifold.

5.

DISCONNECT FUEL INLET PIPE

(a)

Remove the fuel hose clamp.

(b)

Disconnect the fuel inlet pipe (fuel tube connector) from
the fuel filter.

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.

B12949

–

ELECTRONIC FUEL INJECTION

INJECTOR

FI–21

LEXUS RX300   (RM785E)

6.

REMOVE DELIVERY PIPES AND INJECTORS

NOTICE:

S

Be careful not to drop the injectors when removing
the delivery pipes.

S

Pay attention to put any hung load on the injector to
and from the side direction.

(a)

Remove the 5 bolts and delivery pipes together with the
6 injectors and fuel pipe.

(b)

Remove the 4 spacers from the intake manifold.

(c)

Pull out the 6 injectors from the delivery pipes.

(d)

Remove the 2 O–rings and 2 grommets from each injec-
tor.

FI0UZ–01

B12946

Fuel Tube
Connector

SST(Hose)

SST(Union)

SST(Clamp)

Injector

B09225

Fuel Tube Connector

B12947

Fuel Tube Connector

SST
(Hose)

B05298

SST (Union)

SST (Hose)

O–Ring

SST

(Clamp)

Vinyl Tube

D09456

Hand–Held Tester

DLC3

FI–22

–

ELECTRONIC FUEL INJECTION

INJECTOR

LEXUS RX300   (RM785E)

INSPECTION

1.

INSPECT INJECTOR INJECTION

CAUTION:
Keep injector clear of sparks during the test.

(a)

Purchase the new No. 1 fuel pipe and take out the fuel
tube connector from its pipe.
Part No. 23801–20040

(b)

Connect SST (hose) and fuel tube connector to the fuel
filter outlet.
SST

09268–41047

CAUTION:
Perform connecting operations of the fuel tube connector
(quick type) after observing the precautions.
HINT:
Use the vehicle’s fuel filter.

(c)

Install the grommet and O–ring to the injector.

(d)

Connect SST (union and hose) to the injector, and hold
the injector and union with SST (clamp).
SST

09268–41047 (09268–41100, 09268–41300)

(e)

Put the injector into a graduated cylinder.

HINT:
Install a suitable vinyl hose onto the injector to prevent gasoline
from splashing out.

(f)

Connect the hand–held tester to the DLC3.

(g)

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

NOTICE:
Do not start the engine.
(h)

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

(i)

Please refer to the hand–held tester operator’s manual
for further details.