Honda CRV/Odyssey 1995-2000 Repair Information

Fuel Pump

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REMOVAL & INSTALLATION




CAUTION
Observe all applicable safety precautions when working around fuel. Whenever servicing the fuel system, always work in a well-ventilated area. Do not allow fuel spray or vapors to come in contact with a spark or open flame. Keep a dry chemical fire extinguisher near the work area. Always keep fuel in a container specifically designed for fuel storage; also, always properly seal fuel containers to avoid the possibility of fire or explosion.CRV Models See Figures 1 through 5


CAUTION
The fuel injection system remains under pressure, even after the engine has been turned OFF. The fuel system pressure MUST BE relieved before disconnecting any fuel lines. Failure to do so may result in fire and/or personal injury.

  1. Disconnect the negative battery cable.
  2.  
  3. Open the fuel tank filler cap to vent off pressure in the tank.
  4.  
  5. Relieve the fuel pressure, as outlined earlier in this section.
  6.  
  7. Tilt the left rear seat bottom forward.
  8.  
  9. Remove the Phillips screws securing the seat frame cover, then remove the cover.
  10.  
  11. Remove the Phillips screws in the floor fuel pump floor pan cover and lift the cover up to access the fuel pump wiring electrical connector.
  12.  
  13. Detach the fuel pump electrical connector and place the floor pan cover aside.
  14.  
  15. Using a pair of square-nosed pliers, squeeze the spring loaded fuel clamp tabs together to release the clamp's tension and slide the clamp down the fuel line.
  16.  
  17. Press the two tabs on the quick-connect fuel line in and slide the fuel hose away from the fuel line.
  18.  



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Fig. Fig. 1: With the left rear seat tilted forward, remove the seat frame cover fasteners- CRV shown



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Fig. Fig. 2: Once the fasteners are removed, remove the seat frame cover upward and out of the vehicle- CRV shown



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Fig. Fig. 3: With the floor pan access panel removed, detach the electrical connector from the fuel pump- CRV shown



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Fig. Fig. 4: After the electrical connector is detached and the access panel aside, remove the clamped and quick-connect fuel lines, then the 8mm mounting nuts- CRV shown



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Fig. Fig. 5: Always replace the fuel pump base gasket when reinstalling the fuel pump

  1. Remove the 8mm nuts securing the fuel pump mounting plate to the fuel tank, and carefully extract the fuel pump assembly from the fuel tank.
  2.  


WARNING
Ensure that the battery is disconnected before any wires are removed.

  1. Installation is the reverse of the removal procedure, making sure to replace the fuel pump mounting plate seal.
  2.  

Odyssey Models


CAUTION
The fuel injection system remains under pressure, even after the engine has been turned OFF. The fuel system pressure MUST BE relieved before disconnecting any fuel lines. Failure to do so may result in fire and/or personal injury.

4-CYLINDER ENGINES

See Figure 5

  1. Disconnect the negative battery cable.
  2.  
  3. Open the fuel tank filler cap to vent off pressure in the tank.
  4.  
  5. Relieve the fuel pressure, as outlined earlier in this section.
  6.  
  7. Remove the fuel tank assembly. For details, refer to the fuel tank removal procedures later in this section.
  8.  
  9. Detach the fuel pump electrical connector.
  10.  
  11. Using a pair of square-nosed pliers, squeeze the spring loaded fuel clamp tabs together to release the clamp's tension and slide the clamp down the fuel line.
  12.  
  13. Press the two tabs on the quick-connect fuel line in and slide the fuel hose away from the fuel line.
  14.  
  15. Remove the 8mm nuts securing the fuel pump mounting plate to the fuel tank, and carefully extract the fuel pump assembly from the fuel tank.
  16.  


WARNING
Ensure that the battery is disconnected before any wires are removed.

  1. Installation is the reverse of the removal procedure, making sure to replace the fuel pump mounting plate seal.
  2.  

V6 ENGINE

The radio may contain a coded theft protection circuit. Always make note of the code number before disconnecting the battery.

The fuel pump on the V6 Odyssey is located in the fuel tank.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the fuel filler cap, then relieve the fuel system pressure as outlined earlier in this section.
  4.  
  5. Remove the rear seats and carpet.
  6.  
  7. Remove the access panel from the floor.
  8.  
  9. Make sure the ignition switch is in the OFF position, then detach the electrical connector at the fuel pump wire harness.
  10.  
  11. Disconnect the quick-connect fuel fittings from the fuel pump.
  12.  
  13. Remove the fuel pump locknut ring.
  14.  
  15. Remove fuel pump/filter assembly from the fuel tank.
  16.  
  17. Remove fuel filter, then the fuel pump.
  18.  

To install:
  1. Install the fuel pump, then the fuel filter.
  2.  
  3. Install and tighten the locknut ring.
  4.  
  5. Reconnect the fuel lines and electrical connections.
  6.  
  7. Reconnect the negative battery cable and enter the radio security code.
  8.  
  9. Turn the ignition ON , but don't start the engine. Then, turn the ignition OFF . Repeat this step two or three times to pressurize the fuel system.
  10.  
  11. Check the fuel lines and fuel fittings for leakage.
  12.  

TESTINGFuel Pump Circuit



See Figures 6 through 11

If you suspect a problem with the fuel pump, listen for the pump to operate by removing the fuel fill cap and checking to see if the pump can be heard running during the first two seconds after the ignition key is turned to the ON position. You should hear the fuel pump motor run.

If the fuel pump can be heard running, the fuel pump's electrical circuit is likely to be OK and the fuel pump operating pressure should be checked as outlined later in this section.

Once the engine has started, the fuel pump operation is controlled by the Powertrain Control Module (PCM) via the PGM-FI Main Relay. The fuel pump receives its electrical power from the PGM-FI Main Relay, which is triggered for two seconds when the ignition switch is initially turned to the ON position.

After the initial two-second startup signal is received, the PGM-FI Main Relay is controlled by the PCM. Because the fuel pump receives its power from the PGM-FI Main Relay, a problem with the ignition switch, PCM, or electrical wiring may not allow battery voltage to reach the pump.

To check the fuel pump wiring proceed as follows:

  1. Make sure the ignition switch is in the OFF position.
  2.  
  3. Locate and detach the fuel pump electrical connector at the fuel tank.
  4.  
  5. On CRV and V6 Odyssey models, remove the floor access panel. For specific details, see the fuel pump removal procedure in this section.
  6.  
  7. On 4-cylinder Odyssey models, perform the following:
    1. Raise the vehicle and safely support it on suitable jackstands.
    2.  
    3. Remove the protective cover for the fuel tank fuel hoses.
    4.  

  8.  
  9. Detach the fuel pump electrical connector.
  10.  
  11. Connect a suitable voltmeter between the fuel pump positive terminal of the electrical connector and a known good chassis ground. See the accompanying figures for details.

    CRV models: Terminal position No. 4
     
    2.2L Odyssey models: Terminal Position No. 3
     
    2.3L Odyssey models: Terminal Position No. 2
     
    V6 Odyssey models: Terminal Position 5
     

  12.  
  13. Hold the electrical connector of the PGM-FI Main Relay so the wire side of the female terminals is visible and install a jumper wire between terminal Nos. 4 and 5.
  14.  
  15. When the ignition switch is turned to the ON position, battery voltage should be present at the fuel pump electrical connector.
  16.  
  17. If the battery voltage is present, check the fuel pump's ground.
  18.  
  19. If the ground is OK, check the fuel pump.
  20.  
  21. If battery voltage is not present, trace the wiring harness and check the cause for an open or shorted circuit.
  22.  
  23. If all wiring checks out, test the fuel pressure, as outlined later in this section.
  24.  



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Fig. Fig. 6: PGM-FI Main Relay Terminals: (1) PCM (2) Starter Solenoid (3) Ground (4) Fuel Pump (5) Ignition Switch (6) PCM (7) Battery (+)



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Fig. Fig. 7: Insert a jumper wire between terminal Nos. 4 and 5 of the PGM-FI Main Relay. With the ignition switch ON, battery voltage should be present at the fuel pump connector



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Fig. Fig. 8: On CRV models, the fuel pump receives its electrical power from the PGM-FI Main Relay at terminal position No. 4



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Fig. Fig. 9: On 2.2L Odyssey models, the fuel pump receives its electrical power from the PGM-FI Main Relay at terminal position No. 3



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Fig. Fig. 10: On 2.3L Odyssey models, the fuel pump receives its electrical power from the PGM-FI Main Relay at terminal position No. 2



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Fig. Fig. 11: On V6 Odyssey models, the fuel pump receives its electrical power from the PGM-FI Main Relay at terminal position No. 5

Fuel Pump Pressure

The fuel pressure should be checked at the fuel rail or at the fuel feed line for the fuel rail. The fuel pressure is checked with the engine started, thus the fuel pressure gauge must not interrupt the flow of fuel to the fuel rail and the fuel injectors.

To attach a fuel pressure gauge to the pressurized fuel loop you will need an adapter that is capable of safely withstanding the fuel system fuel pressure.


WARNING
Checking the fuel system fuel pressure requires the use of an inline fuel pressure gauge with the engine running. Do not perform this check if suitable test equipment and fuel fittings are not available. The fuel system operates under pressure, if any fuel leakage is noticed while performing this check STOP immediately and do not continue until the source of the leak is resolved. Do not perform this test near sources of heat, spark, or flames. This test must be performed in a well-ventilated area.


CAUTION
The fuel injection system remains under pressure, even after the engine has been turned OFF. The fuel system pressure MUST BE relieved before disconnecting any fuel lines. Failure to do so may result in fire and/or personal injury.

To check the fuel system pressure proceed as follows:

  1. Remove the fuel filler cap and relieve the fuel pressure, as outlined in this section.
  2.  
  3. Attach a suitable fuel pressure gauge to the fuel injection fuel loop as follows:

    CRV models: Remove the banjo bolt from the fuel filter outlet and install the pressure gauge using a suitable fitting to temporarily substitute for the banjo bolt and supply fuel to the gauge and the fuel rail.
     
    2.2L Odyssey models: Remove the service/banjo bolt from the end of the fuel rail. Install the fuel pressure gauge using a suitable fitting to temporarily substitute for the banjo bolt or in place of the service bolt that will allow fuel to be supplied to the gauge and the fuel rail.
     
    2.3L Odyssey models: Remove the banjo bolt from the fuel filter outlet and install the pressure gauge using a suitable fitting to temporarily substitute for the banjo bolt and supply fuel to the gauge and the fuel rail.
     
    V6 Odyssey models: Remove the fuel pulsation damper from the end of the fuel rail and install a suitable fuel pressure gauge in its place.
     

  4.  
  5. Remove and plug the vacuum line for the fuel pressure regulator located near the end of the fuel rail.
  6.  
  7. Start the engine and note the fuel pressure. With the pressure regulator vacuum hose disconnected and plugged, the fuel pressure should register as follows:
  8.  

The engine number on the CRV models is located on the side of the engine facing the radiator, near the transmission bell housing. Refer to General Information and Maintenance for specific details.



CRV models with the B20B4 Engine: 38-46 psi (260-310 kPa)
 
CRV models with the B20Z2 Engine: 40-47 psi (270-320 kPa)
 
2.2L Odyssey models: 38-46 psi (260-310 kPa)
 
2.3L Odyssey models: 47-54 psi (320-370 kPa)
 
V6 Odyssey models: 41-48 psi (280-330 kPa)
 

If the engine wont start, turn the ignition switch ON, wait two seconds, then turn the ignition switch OFF. Turn the ignition switch back ON again and read the fuel pressure.

  1. If the fuel pressure is higher than specification, check for a pinched or restricted fuel return hose or line.
  2.  
  3. If the fuel pressure is lower than the specification, check for a damaged fuel pressure regulator, clogged fuel filter, fuel feed line or a leak in the fuel feed line. If the fuel pressure regulator, fuel feed lines, and fuel pump are OK, replace the fuel pump and fuel filter.
  4.  

The fuel pressure regulator testing procedures are located later in this section.

Once the test is complete, perform the following:

  1. Carefully remove the fuel pressure gauge and test fittings.
  2.  
  3. Install the removed fasteners using new sealing washers.
  4.  
  5. Install the fuel filler cap.
  6.  
  7. Start the engine and check for any fuel leaks, and repair as necessary.
  8.  

 
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