Without Using M-MDS or equivalent

CAUTION:

Shorting the wrong terminal of the check connector may cause malfunctions. Make sure to short only the specified terminal.

Ground the check connector terminal F/P using the jumper wire.

Fig 1: Locating Check Connector

G04562820

Courtesy of MAZDA MOTORS CORP.

Remove the fuel filler cap.
Turn the ignition switch to the ON position and verify that the fuel pump can be heard operating.
- 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.
  - 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
      
      Fig 2: Identifying Fuel Pump Unit Wiring Harness-Side Connector
      Courtesy of MAZDA MOTORS CORP.
Voltage 3.76-5.28 V
Disconnect the jumper wire.