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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 439 (Fuel System) >> Fuel Pump Unit Inspection >> Fuel Pump Operation Inspection >> Without Using WDS or equivalent

Without Using WDS or equivalent

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
  • Shorting the wrong terminal of the check connector may cause malfunctions. Make sure to short only the specified terminal.
  1. Ground the check connector terminal F/P using the jumper wire.
  2. Remove the fuel filler cap.
  3. Turn the ignition switch to the ON position and verify that the fuel pump can be heard operating.
    Fig 1: Checking Connector Terminal F/P Using Jumper Wire Ground
    G03701903Courtesy of MAZDA MOTORS CORP.
    • If it cannot be verified, inspect for a voltage of 3.76-5.28 V  on the fuel pump wiring harness-side connector terminal B.
      Fig 2: Identifying Fuel Pump Unit Wiring Harness-Side Connector Terminal
      G03701904Courtesy of MAZDA MOTORS CORP.
      • If it is within the specification, inspect the following.
        • Fuel pump continuity inspection
        • Wiring harness between fuel pump terminal D and GND
      • If not within the specification, inspect the following.
        • Fuel pump relay
        • Wiring harnesses, connectors between main relay, fuel pump relay, and check connector
        • Wiring harnesses, connectors between fuel pump relay, fuel pump resistor, and fuel pump

    Voltage 

    1. 3.76-5.28 V 
  4. Disconnect the jumper wire.