Fuel Pump Operation Inspection

1. Follow "BEFORE SERVICE PRECAUTION" before performing any work operations to prevent fuel from spilling from the fuel system. (See BEFORE SERVICE PRECAUTION  .)
2. Remove the fuel-filler cap.
3. Start the fuel pump using the following procedure:

   Using WDS or equivalent 

   1. Connect the WDS or equivalent to the DLC-2.
   2. Start the fuel pump using the "FP" simulation function.
      Fig 1: Locating DLC-2 Connector

      Courtesy of MAZDA MOTORS CORP.

   Not using WDS or equivalent 

   1. Short the check connector terminal F/P to ground using a jumper wire.
      Fig 2: Checking Connector Terminal F/P To Ground Using Jumper Wire

      Courtesy of MAZDA MOTORS CORP.
   2. Turn the ignition switch to the ON position to operate the fuel pump.
      Fig 3: Identifying F/P Connector Terminal

      Courtesy of MAZDA MOTORS CORP.
4. Verify that operation sound is heard from the fuel pump.
   • If the operation sound cannot be verified, measure the voltage at fuel pump unit wiring harness-side connector terminal B.
     • If as specified, inspect the following:
       • Fuel pump unit continuity
     • If not within the specification, inspect the following:
       • Fuel pump unit relay
       • Wiring harnesses and connectors between main relay and fuel pump relay
       • Wiring harnesses and connectors between fuel pump relay and PCM
       • Wiring harnesses and connectors between battery and fuel pump relay
       • Wiring harnesses and connectors between fuel pump relay and fuel pump unit
       Fig 4: Identifying Fuel Pump Unit Connector Terminal

       Courtesy of MAZDA MOTORS CORP.

Standard 

B+ (Ignition switch at ON)