2006 ACURA CSX fuel pump

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 Special Tools Required
11-32511-325
Fuel Pressure Test Fuel Tank Draining
07406-004000B
07AAJ-S6MA150
 Fuel pressure gauge 07406-004000B
 Fuel pressure gauge attachment set 07AAJ-S6MA150 1. Relieve the fuel pressure (see page 11-322).
2. Disconnect the quick-connect fitting. Attach the fuel pressure gauge set and the fuel pressure gauge.
3. Start the engine, and let it idle.  If the engine starts, go to step 5.
 If the engine does not start, go to step 4.
4. Check to see if the fuel pump is running: Listen to the fuel filler port with the fuel fill cap removed.
The fuel pump should run for 2 seconds when the
ignition switch is first turned on.
 If the pump runs, go to step 5.
 If the pump does not run, do the fuel pump circuit troubleshooting (see page 11- 318).
5. Read the fuel pressure gauge. The pressure should be 330 380 kPa (3.4 3.9 kgf/cm , 48 55 psi).
 If the pressure is OK, the test is complete.
 If the pressure is out of specification, replace the fuel pressure regulator (see page 11-337) and the
fuel filter (see page 11-337), then recheck the fuel
pressure. 1. Remove the fuel tank unit (see page 11-334).
2. Using a hand pump, a hose, and a container
suitable for fuel, draw the fuel from the fuel tank.
3. Reinstall the fuel tank unit (see page 11-335).
2
08/08/21 14:29:49 61SNR030_110_0325
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colorLine
diameter
Manufacturer
11-328 Fuel Supply System
Fuel Line/Quick-Connect Fitting Precautions
A
B
F H
I
G A
C
J
K
D
M L
E O
N
The fuel line/quick-connect fittings (A), (B), (C), (D), and
(E) connect the fuel rail (F) to fuel feed hose A (G), fuel
feed hose A to fuel feed hose B (H), fuel feed hose B to
the fuel line (I), the fuel line (J) to the fuel tank unit (K),
the fuel vapor line (L) to the EVAP canister (M) and the
fuel tank vapor recirculation tube (N) to the fuel fill pipe
(O). When removing or installing the fuel feed hose, the
fuel tank unit, or the fuel tank, you need to disconnect
or connect the quick-connect fittings.
Pay attention to the following:  The fuel feed hoses, the fuel line, and the quick- connect fittings are not heat-resistant; be careful not
to damage them during welding or other heat-
generating procedures.
 The fuel feed hoses, the fuel line, and the quick- connect fittings are not acid-proof; do not touch them
with a shop towel that was used for wiping battery
electrolyte. Replace them if they come in contact with
electrolyte or something similar.
 When connecting or disconnecting the fuel feed hoses, the fuel line, and the quick-connect fittings, be
careful not to bend or twist them excessively. Replace
them if they are damaged.
A disconnected quick-connect fitting can be
reconnected, but the retainer on the mating line cannot
be reused once it has been removed from the line.
Replace the retainer when: replacing the fuel rail.
 replacing the fuel line.
 replacing the fuel pump.
 replacing the fuel filter.
 replacing the fuel gauge sending unit.
 replacing the EVAP purge line.
 replacing the EVAP canister.
 replacing the fuel tank.
 replacing the fuel fill pipe.
 it has been removed from the line.
 it is damaged.
A Tokai Green 6.3 mm (0.2 in.)
B Tokai Blue green8mm
(0.3 in.)
C Sanoh White 9.5 mm (0.4 in.)
D Sanoh White 12 mm (0.5 in.)
E Tokai Natural 12 mm (0.5 in.)
* : This illustration shows K20Z2 engine.
08/08/21 14:29:51 61SNR030_110_0328
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11-330Fuel Supply System
Fuel Line/Quick-Connect Fitting Removal (cont’d)
A
B
A
4. Check the contact area (A) of the line (B) for dirt ordamage.
 If it is dirty, clean it, then dry it with the compressed air.
 If it is rusty or damaged, replace the fuel filter or fuel feed line. 5. To prevent damage and keep foreign matter out,
cover the disconnected connector and line ends
with plastic bags (A).
NOTE: The retainer cannot be reused once it has
been removed from the line.
Replace the retainer when: replacing the fuel rail.
 replacing the fuel feed line.
 replacing the fuel pump.
 replacing the fuel filter.
 replacing the fuel gauge sending unit.
 replacing the EVAP purge pipe.
 replacing the EVAP canister.
 replacing the fuel tank.
 replacing the fuel fill pipe.
 it has been removed from the line.
 it is damaged.
08/08/21 14:29:53 61SNR030_110_0330
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11-331
Fuel Line/Quick-Connect Fitting Installation
A B
B A A
A
B
A
B
A
B
NOTE: Before you work on the fuel lines and fittings,
read the Fuel Line/Quick-Connect Fitting Precautions
(see page 11-328). 1. Check the contact area (A) of the line (B) for dirt or damage, and clean it if needed.
2. Insert a new retainer (A) into the connector (B) if the retainer is damaged, or after:
 replacing the fuel rail.
 replacing the fuel feed line.
 replacing the fuel pump.
 replacing the fuel filter.
 replacing the fuel gauge sending unit.
 replacing the EVAP purge pipe.
 replacing the EVAP canister.
 replacing the fuel tank.
 replacing the fuel fill pipe.
 removing the retainer from the line.
 Use the same manufacturer’s retainer and the same size when replacing the retainer (see page
11-328). 3. Before connecting a new fuel tube/quick-connect
fitting assembly (A), remove the old retainer (B)
from the mating line.
(cont’d)
* : This illustration shows K20Z2 engine.
08/08/21 14:30:55 61SNR030_110_0331
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Connection to new fuel line
11-333
A
B
Sanoh-made Tokai-made
A
B C
5. When you reconnect the connector with the old
retainer, make sure the connection is secure and
the tabs (A) are firmly locked into place; check
visually and also by pulling the connector (B).
When you replace the fuel line with a new one,
make sure you remove the ring pull (C) upwards
after you confirm the connection is secure.
NOTE: Before you remove the ring pull, make sure
the fuel line connection is secure. If the connection
is not secure, the ring pull could break when you try
to remove it. 6. Reconnect the negative cable to the battery, and
turn the ignition switch to ON (II) (but do not
operate the starter motor). The fuel pump will run
for about 2 seconds, and fuel pressure will rise.
Repeat this two or three times, then check that
there is no leakage in the fuel supply system.
08/08/21 14:30:57 61SNR030_110_0333
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Special Tools Required
Removal
11-334
Fuel Supply System
Fuel Tank Unit Removal and Installation
A
A
B
C A
07AAA-SNAA100
A
B
Fuel pump module locknut wrench 07AAA-SNAA100 1. Relieve the fuel pressure (see page 11-322).
2. Remove the rear seat cushion (see page 20-131).
3. Remove the rear floor upper cross-member (A).
4. Remove the access panel (A) from the floor.
5. Disconnect the fuel tank unit 4P connector (B).
6. Disconnect the quick-connect fittings (C) from the fuel tank unit. 7. Using the special tool, loosen the locknut (A).
8. Remove the locknut (A) and the fuel tank unit (B).
08/08/21 14:30:58 61SNR030_110_0334
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11-336Fuel Supply System
Fuel Tank Unit Removal and Installation (cont’d)
A
B
07AAA-SNAA100 A
120 N·m
(12.2 kgf·m, 88.2 lbf·ft) A
A
4. Install a locknut plate (A) and a new locknut (B).
5. Using the special tool, tighten the new locknut (A) to the specified torque.
NOTE: After tightening, make sure the marks are still aligned.
 After installation, check the base gasket, visually or by hand, to make sure it is not pinched. 6. Connect the fuel tank unit 4P connector, then
connect the quick-connect fitting.
7. Reconnect the negative cable to the battery, and turn the ignition switch to ON (II) (but do not
operate the starter motor). The fuel pump will run
for about 2 seconds, and fuel pressure will rise.
Repeat this two or three times, then check that
there is no leakage in the fuel supply system.
8. Install the access panel (A) to the floor.
9. Install the rear floor upper cross-member (A).
10. Install the rear seat cushion (see page 20-131).
11. Install the fuel fill cap.
08/08/21 14:30:59 61SNR030_110_0336
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11-33711-337
Fuel Pressure Regulator
Replacement Fuel Filter Replacement
A
B
C
D A
D B
C D
B
1. Remove the fuel tank unit (see page 11-334).
2. Remove the bracket (A).
3. Remove the ground ring (B).
4. Remove the fuel pressure regulator (C).
5. Install the parts in the reverse order of removal with new O-rings (D) and a new bracket (A). When
installing the fuel tank unit, align the marks on the
unit and the fuel tank (see page 11-335).
NOTE: Coat the O-rings with clean engine oil; do
not use any other oil.
Do not pinch the O-rings during installation. The fuel filter should be replaced when
ever the fuel
pressure drops below the specified value (see page
11-325), after making sure that the fuel pump and the
fuel pressure regulator are OK.
1. Remove the fuel tank unit (see page 11-334).
2. Remove the fuel filter set (A).
3. Check these items before installing the fuel tank unit:
 When connecting the wire harness, make sure the connection is secure and the connectors (B)
are firmly locked into place.
 When installing the fuel gauge sending unit (C), make sure the connection is secure and the
connector is firmly locked into place. Be careful
not to bend or twist it excessively.
4. Install the parts in the reverse order of removal with new O-rings (D). When installing the fuel tank
unit, align the marks on the unit and the fuel tank
(see page 11-335).
08/08/21 14:31:00 61SNR030_110_0337
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