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Home >> Mazda >> 2007 >> RX-8 Touring, 1.3 3 >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel System >> Fuel Pump Unit Inspection >> Fuel Pump Controlling System Inspection >> Using M-MDS or equivalent

Using M-MDS or equivalent

  1. Perform the fuel pump operation inspection.
  2. Connect the M-MDS or equivalent to the DLC-2.
  3. Start the engine and idle it.
  4. Verify that the rotation sound of the fuel pump (higher frequency wave) goes higher when turning fuel pump speed control relay from off to on using the simulation function FPC.
    • If it cannot be verified, inspect the following and repair or replace the malfunctioning part.
      • Stuck fuel pump speed control relay
      • Wiring harnesses, connectors between fuel pump speed control relay and PCM
      • Fuel pump resistor
      • Wiring harnesses open circuit between fuel pump speed control relay and fuel pump
        Fig 1: Identifying DLC-2 Connector Terminal
        G04562839Courtesy of MAZDA MOTORS CORP.
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