Fuel Pump Test

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Honda Odyssey, 2003 Honda Odyssey, 2002 Honda Odyssey, 2001 Honda Odyssey, and 2000 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

If you suspect a problem with the fuel pump, check that the fuel pump actually runs; when it is on, you will hear fuel flow if you listen to the injector rails underneath the intake manifold cover. The fuel pump should run for 2 seconds when the ignition switch is first turned ON (II). If the fuel pump does not make noise, check as follows:

Remove the rear seats and carpet.
Remove the access panel (A) from the floor.

Fig 1: Removing Access Panel
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Turn the ignition switch OFF, then disconnect the fuel pump 5P connector.
Connect PGM-FI main relay 7P connector terminals No. 4 and No. 5 with a jumper wire.

Fig 2: Connecting Main Relay
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Turn the ignition switch ON (II).
Check that battery voltage is available between fuel pump 5P connector terminals No. 4 and 5.
- If battery voltage is available, check the fuel pump ground. If the ground is OK, replace the fuel pump. See Fuel Pump Replacement .
- If there is no voltage, check the wire harness. See DTC P0463-'03-04 Models: Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit High Voltage .

Fig 3: Checking Battery Voltage Available Between Fuel Pump

Courtesy of AMERICAN HONDA MOTOR CO., INC.