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Home › Mazda › 2007 › 3 Mazdaspeed, 2.3 M › Repair and Diagnosis › Engine Performance › System › Symptom Troubleshooting (L3 With TC) › Engine Control System Operation Inspection › Fuel Pump Control System Inspection › If simulation function of M-MDS is not used:

If simulation function of M-MDS is not used:

  1. Crank the engine and verify that the fuel pump relay operation sound is heard.
  2. If the operation sound is not heard, inspect the following:
    • Fuel pump relay
    • Wiring harness and connectors (Main relay - fuel pump relay - PCM terminal 1H)
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