5-1

FUEL SYSTEM (4Y-E)

Page 0
SST TO BE USED .............................................. 5-2
1
THROTTLE BODY ............................................. 5-3
COMPONENTS........................................................... 5-3
2
REMOVAL·INSPECTION·INSTALLATION ................ 5-4 3
INJECTOR.......................................................... 5-6
4
COMPONENTS........................................................... 5-6
REMOVAL·INSPECTION·INSTALLATION ................ 5-7 5
FUEL PRESSURE REGULATOR............................. 5-10 6
FUEL PUMP ..................................................... 5-11
COMPONENTS......................................................... 5-11
7
REMOVAL·INSPECTION·INSTALLATION .............. 5-12 8
INTAKE TEMPERATURE SENSOR ................ 5-15
9
REMOVAL................................................................. 5-15
INSPECTION............................................................. 5-15 10
INSTALLATION ........................................................ 5-15 11
12
13
14
15
16
17
18
5-2

SST TO BE USED
Illustration Part No. Part name

09268-76007-71
Injection measuring tool set
(09268-41047)

09842-76001-71
EFI inspection wire
(09842-30070)
 5-3

THROTTLE BODY
COMPONENTS
2103 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
5-4

REMOVAL·INSPECTION·INSTALLATION
T = N·m (kgf·cm) [ft·lbf]

T = 14 (143) [10.3]

Removal·Installation Procedure
The installation procedure is the reverse of the removal procedure.
No. Item Removal Inspection Installation
1 Battery negative terminal
2 Air cleaner hose
3 Intake pipe
4 Air intake connector
5 Throttle body [Point 1]
6 Vacuum sensor

Point Operations
[Point 1]
Throttle
shaft Inspection:
Clearance Inspection of the throttle body
1. Make sure that the throttle shaft is not loose.
2. Firmly press the throttle valve with your finger to open and
close.
Air horn 6° 3. When the throttle valve is in a free condition, there must be an
appropriate angle and clearance between the air horn and the
throttle valve.
[Reference] Throttle angle is approx. 6°.
 5-5

Inspection:
Inspection of the throttle motor
Measure the resistance value between the terminals.
M(-) M(+) Standard
Between M(+) and M(-): 0.3 to 100 Ω
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
5-6

INJECTOR
COMPONENTS
1701
 5-7

REMOVAL·INSPECTION·INSTALLATION
T = N·m (kgf·cm) [ft·lbf]

T = 21 (214) [15.5]

5
T = 8 (81) [5.9]

Removal·Installation Procedure
The installation procedure is the reverse of the removal procedure.
No. Item Removal Inspection Installation
1 Battery negative terminal
2 Throttle body See P3-4 ← ←
3 Elimination of fuel pressure in fuel system See P3-5 ← ←
4 Pressure regulator [Point 1] [Point 5]
5 Delivery pipe, spacer, and injector See P3-5 [Point 2] [Point 4]
6 Injector spacer [Point 3]

Note:
During the reassembly, use new gaskets and O-rings.
Point Operations
[Point 1]
Removal:
Place a fuel tray under the pressure regulator.
Wrap a small piece of waste cloth around the union section,
and eliminate the fuel pressure by slowly loosening the union
bolt.
Caution:
• Put waste cloth in order to prevent the fuel from
splashing.
• Do not allow any fire to come close during the operation.
5-8

O-ring [Point 2]
Inspection:
Inspection of the injector injection amount and leakage
1. Install SST as shown in the left illustration to the injector with
the O-ring and grommet installed, and install the injector with
Grommet the fuel filter on the vehicle side and the single item of the
pressure regulator.
SST
SST 09268-76007-71
(09268-41047)
Caution:
• Put waste cloth in order to prevent the fuel from
splashing.
• Do not allow any fire to come close during the operation.
2. Disconnect the connector of the fuel pump relay inside the
relay box.
Terminal 2
3. Short circuit the terminal 1 and terminal 2 in the disconnected
relay block.

Terminal 1

C/OPN RLY

SST 4. Connect SST to the injector.

SST 09842-76001-71
(09842-30070)
5. Turn the ignition key switch on to activate the fuel pump.
6. Connect SST to the battery, and measure the injection amount
of the injector.
Standard: 41 to 42 cc/15 seconds
Caution:
Battery
Fuel will be splashed when injecting, so put a vinyl hose with
the inside diameter of 9 to 10φ to the tip of the injector nozzle
and receive fuel in the measuring cylinder.
7. Maintain the condition in which the fuel pressure is applied,
and inspect the leakage from the nozzle section.
Standard: 1 drop or less/3 minutes
Inspection:
Inspection of the injector resistance
Standard: 13.8 ± 0.4 Ω (20°C) [68°F]
 5-9

[Point 3]
Installation:
Firmly install the O-ring and the insulator to the injector spacer,
and then install the spacer to the intake manifold.

O-ring
Insulator

Spacer Note:
• Apply E/G oil or grease to the O-ring portion of the spacer
when inserting it.
• Insert the spacer straight and check that the spacer is
firmly attached.

Intake manifold
[Point 4]
Installation:
Apply gasoline to the O-ring, and firmly insert the injector to the
delivery pipe as far as it will go.
Note:
• While turning the injector to left and right, firmly insert the
injector to the delivery pipe.
• Align all the four connector sections of the injector to face
upward.
O-ring • After the reassembly, check that the injector rotates
smoothly.
[Point 5]
O-ring
Installation:
Install the pressure regulator to the delivery pipe.
Note:
Apply gasoline to the O-ring before insertion.
5-10

FUEL PRESSURE REGULATOR

Inspection
Fuel filter
Caution:
• Put waste cloth in order to prevent the fuel from
splashing.
• Do not allow any fire to come close during the operation.
SST
1. Remove the negative terminal of the battery.
Delivery pipe 2. Eliminate the fuel pressure. (See P5-7)
3. Install the fuel pressure indicator between the fuel filter and the
delivery pipe via SST.
SST 09268-76007-71
(09268-41047)
4. Turn the ignition key switch on to activate the fuel pump, and
measure the fuel pressure at that moment.
Standard: 284 ± 5 kPa (2.9 ± 0.1 kgf/cm2) [41.2 ± 1.4 psi]
Note:
The above standard is applied when the vacuum port of the
pressure regulator is an atmospheric discharge.
 5-11

FUEL PUMP
COMPONENTS
2303
5-12

REMOVAL·INSPECTION·INSTALLATION
T = N·m (kgf·cm) [ft·lbf]
2

3 T = 9.6 to 14.4
1 (97.9 to 146.8)
[7.1 to 10.6]

Removal·Installation Procedure
The installation procedure is the reverse of the removal procedure.
No. Item Removal Inspection Installation
1 Relay box
2 Battery
3 Battery set plate
4 Fuel hose [Point 1]
5 Fuel tank cover [Point 2] [Point 6]
6 Fuel pump [Point 3] [Point 4] [Point 5]

Point Operations
[Point 1]
Removal:
Place waste cloth and a fuel tray under the fuel filter, and then
disconnect the fuel hose.
Caution:
• Take measures to prevent the fuel from splashing.
• Do not allow any fire to come close during the operation.
• Drain the fuel from the filter and the hose side thoroughly.
 5-13

[Point 2]
Removal:
Disconnect the fuel tank cover pipe and the fuel hose.
Note:
Make sure to use two wrenches when loosening.

Tank cover

[Point 3]
Removal:
Loosen the hose clamps, and remove the fuel pump ASSY.
Hose
clamps

Fuel pump

[Point 4]
Inspection:
Apply the battery voltage between the terminals, and check
that the motor runs.
Caution:
• Inspection should be performed in a short period of time
(within 5 seconds).
• Bring the pump away from the battery as far as possible.
• Carry out the switching operation at the negative side of
the battery.

Inspection:
Using the tester, measure the resistance between the
terminals.
Standard: 0.2 to 3.0 Ω

[Point 5]
Pipe
Installation:
Install the fuel pump to the tank cover.
Caution:
Hose The hose connecting the main unit of the pump and the pipe
should be inserted thoroughly so that it will not lean to the one
side.
5-14

Caution:
In order to prevent a gap at the bottom of the tank cover when
There should fixing the pump, adjust with the dimensions of the inserted
be no gap. pipe and the hose at the top of the pump.

[Point 6]
Installation:
Install the fuel hose to the fuel pipe of the tank cover.
Caution:
• Make sure to tighten using two wrenches.
• There should be no interference with other parts by a
kinked hose.

Tank cover
 5-15

Intake temperature INTAKE TEMPERATURE SENSOR

sensor

REMOVAL
Grommet
1. Hold the connector lock, and disconnect the connector.
2. Remove the intake temperature sensor.

Air cleaner
inlet hose

INSPECTION
Measure the resistance value between the terminals.
Temperature (°C) [°F] -20 [-4] 20 [68] 80 [176]
Resistance (kΩ) 16.2 2.45 0.32

INSTALLATION
Firmly press the intake temperature sensor into the grommet
section of the air cleaner inlet hose.
Note:
• After the installation, check its condition.
• Make sure that it is firmly inserted and not installed at an
angle.