Acura CSX. Manual — part 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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