LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2007 >> 3 Mazdaspeed, 2.3 L >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting (L3 With TC) >> Engine Control System Operation Inspection >> Fuel Pump Speed Control Inspection >> If simulation function of M-MDS is used:
April 5, 2026: LEMON Manuals is launched! Read the announcement.

If simulation function of M-MDS is used:

  1. Perform the Fuel Pump Operation Inspection.
  2. Connect the M-MDS to the DLC-2.
  3. Turn the ignition switch to the ON position.
  4. Turn the fuel pump speed control relay from off to on using the FPRR PID and verify that the fuel pump speed control relay operation sound is heard.
    • If the operation sound is not heard, inspect the following:
      • Fuel pump speed control relay
      • Wiring harness and connectors (Main relay - fuel pump speed control relay - PCM terminal 4P)
  5. Start the engine and run it is idling.
  6. Remove the fuel-filler cap.
  7. Turn the fuel pump speed control relay from off to on using the FPRR PID and inspect if the operation sound frequency of the fuel pump is higher than when the FPRR PID is off.
    • If it cannot be verified, inspect the following:
      • Fuel pump resister
      • Wiring harness and connectors (open circuit at fuel pump speed control relay terminal C - fuel pump relay terminal D)
scientia non olet · About LEMON Manuals