Acura CSX. Instruction — page 167

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11-337

11-337

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 whenever 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).

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11-338

Fuel Supply System

Fuel Pump/Fuel Gauge Sending Unit Replacement

A

B

C

1. Remove the fuel tank unit (see page 11-334).

2. Remove the fuel level sensor (fuel sending unit) (A)

from the fuel tank unit (B).

3. Check these items before installing the fuel tank

unit:

• When connecting the wire harness, make sure

the connection is secure and the connector (C) is
firmly locked into place.

• When installing the fuel gauge sending unit, be

careful not to bend or twist it excessively.

4. Install the parts in the reverse order of removal.

When installing the fuel tank unit, align the marks
on the unit and the fuel tank (see page 11-335).

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11-339

Fuel Tank Replacement

C

D

E

H

22 N·m
(2.2 kgf·m,
16 lbf·ft)

38 N·m
(3.9 kgf·m, 28 lbf·ft)

I

A

B

F

G

1. Drain the fuel tank (see page 11-325), then disconnect fuel tank unit 4P connector (A) and the quick-connect fittings

(B).

2. Raise the vehicle on a lift.

3. Remove the cover (C), and the EVAP canister guard pipe (D).

4. Disconnect the fuel fill tube (E). Slide back the clamps, then twist the hoses as you pull to avoid damaging them.

5. Disconnect the quick-connect fitting (F) and the fuel tank vapor recirculation tube (G).

6. Place a jack or other support under the fuel tank (H).

7. Remove the strap bolts and the strap (I).

8. Remove the fuel tank.

9. Install the parts in the reverse order of removal.

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01

02

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11-340

Fuel Supply System

Fuel Gauge Sending Unit Test

A

A

B

FUEL TANK UNIT 4P CONNECTOR

ORN

LT GRN

NOTE: For the fuel gauge system circuit diagram, refer
to the Gauges Circuit Diagram (see page 22-244).

1. Check the No. 10 METER (7.5 A) fuse in the under-

dash fuse/relay box before testing.

2. Check for body electrical system DTCs.

• If no DTCs are found, go to step 3.
• If DTC B1175 or B1176 is indicated, go to the

indicated DTC’s troubleshooting.

3. Turn the ignition switch to LOCK (0).

4. Remove the rear seat cushion (see page 20-131).

5. Remove the rear floor upper cross-member (A).

6. Remove the access panel (A) from the floor.

7. Disconnect the fuel tank unit 4P connector (B).

8. Measure the voltage between fuel tank unit 4P

connector terminals No. 1 and No. 3 with the
ignition switch ON (II). There should be battery
voltage.

• If the voltage is OK, go to step 9.
• If the voltage is not as specified, check for:

– a short in the ORN wire to ground.
– an open in the ORN or LT GRN wire.

9. Turn the ignition switch to LOCK (0).

10. Remove the fuel tank unit from the fuel tank

(see page 11-334).

Wire side of female terminals

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