Acura CSX. Instruction — page 163

12

13

14

15

YES

NO

YES

NO

YES

NO

11-321

FUEL TANK UNIT 4P CONNECTOR

FUEL PUMP
(GRN)

PGM-FI MAIN RELAY 2 (FUEL PUMP) 4P CONNECTOR

FUEL PUMP

IG1

JUMPER WIRE

FUEL TANK UNIT 4P CONNECTOR

FUEL PUMP
(GRN)

GND (BLK)

FUEL TANK UNIT 4P CONNECTOR

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

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

31. Remove the rear floor upper cross-member, then

remove the access panel from the floor (see page
11-334).

32. Turn the ignition switch to ON (II), and measure the

voltage between fuel tank unit 4P connector
terminal No. 2 and body ground within 2 seconds.

Go to step 37.

Go to step 33.

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

34. Remove PGM-FI main relay 2 (FUEL PUMP).

35. Connect PGM-FI main relay 2 (FUEL PUMP) 4P

connector terminals No. 1 and No. 2 with a jumper
wire.

36. Turn the ignition switch to ON (II), and measure the

voltage between fuel tank unit 4P connector
terminal No. 2 and body ground.

Replace PGM-FI main relay 2

(FUEL PUMP).

Repair open in the wire between PGM-FI main

relay 2 (FUEL PUMP) and the fuel tank unit 4P
connector.

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

38. Check for continuity between fuel tank unit 4P

connector terminal No. 4 and body ground.

Replace the fuel pump (see page 11-338).

Repair open in the wire between the fuel tank

unit 4P connector and G601 (see page 22-34).

Wire side of female terminals

Terminal side of female terminals

Wire side of female terminals

Wire side of female terminals

Is ther e batter y voltage?

Is ther e batter y voltage?

Is ther e continuity?

08/08/21 14:29:47 61SNR030_110_0321

01

02

03

SNR9A00A20326400000MBAT01

With the HDS

11-322

Fuel Supply System

Fuel Pressure Relieving

A

A

A

Before disconnecting fuel lines or hoses, relieve
pressure from the system by disabling the fuel pump
and then disconnecting the fuel tube/quick connect
fitting in the engine compartment.

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

2. Connect the HDS to the data link connector (DLC)

(A) located under the driver’s side of the dashboard.

3. Turn the ignition switch to ON (II).

4. Make sure the HDS communicates with the ECM/

PCM. If it doesn’t, go to the DLC circuit
troubleshooting (see page 11-204).

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

6. Remove the fuel fill cap to relieve the pressure in

the fuel tank.

7. Turn the ignition switch to ON (II).

8. From the INSPECTION MENU of the HDS, select

Fuel Pump OFF, then start the engine, and let it idle
until it stalls.

NOTE:

• Do not allow the engine to idle above 1,000 rpm

or the ECM/PCM will continue to operate the fuel
pump.

• A DTC or a Temporary DTC may be set during

this procedure. Check for DTCs, and clear them
as needed (see page 11-4).

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

10. Do the battery terminal disconnection procedure

(see page 22-68).

11. Remove the quick-connect fitting cover (A).

12. Check the fuel quick-connect fitting for dirt, and

clean it if needed.

13. Place a rag or shop towel over the quick-connect

fitting (A).

08/08/21 14:29:48 61SNR030_110_0322

04

*01

Without the HDS

11-323

A

B

C

E

D

A

14. Disconnect the quick-connect fitting (A): Hold the

connector (B) with one hand, and squeeze the
retainer tabs (C) with the other hand to release
them from the locking tabs (D). Pull the connector
off.

NOTE:

• Be careful not to damage the line (E) or other

parts.

• Do not use tools.
• If the connector does not move, keep the retainer

tabs pressed down, and alternately pull and push
the connector until it comes off easily.

• Do not remove the retainer from the line; once

removed, the retainer must be replaced with a
new one.

15. After disconnecting the quick-connect fitting, check

it for dirt or damage (see step 4 on page 11-330).

16. Do the battery terminal reconnection procedure

(see page 22-68).

1. Remove the under-dash fuse/relay box (see page

22-66), then remove PGM-Fl main relay 2 (FUEL
PUMP) (A) from the under-dash fuse/relay box.

2. Reinstall the under-dash fuse/relay box.

3. Start the engine, and let it idle until it stalls.

NOTE: If any DTCs are stored, clear and ignore
them.

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

5. Remove the fuel fill cap.

6. Do the battery terminal disconnection procedure

(see page 22-68).

08/08/21 14:29:48 61SNR030_110_0323

06

07

08

11-324

Fuel Supply System

A

A

A

B

C

E

D

7. Remove the quick-connect fitting cover (A).

8. Check the fuel quick-connect fitting for dirt, and

clean it if needed.

9. Place a rag or shop towel over the quick-connect

fitting (A).

10. Disconnect the quick-connect fitting (A): Hold the

connector (B) with one hand, and squeeze the
retainer tabs (C) with the other hand to release
them from the locking tabs (D). Pull the connector
off.

NOTE:

• Be careful not to damage the line (E) or other

parts.

• Do not use tools.
• If the connector does not move, keep the retainer

tabs pressed down, and alternately pull and push
the connector until it comes off easily.

• Do not remove the retainer from the line; once

removed, the retainer must be replaced with a
new one.

11. After disconnecting the quick-connect fitting, check

it for dirt or damage (see step 4 on page 11-330).

12. Do the battery terminal reconnection procedure

(see page 22-68).

08/08/21 14:29:49 61SNR030_110_0324

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