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Home >> Mazda >> 1989 >> 929 >> Repair and Diagnosis >> Engine Performance >> System >> Basic Testing - V6 >> Fuel Pressure >> Fuel Injection Models >> Fuel Pump Circuit
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Fuel Pump Circuit

  1. Turn ignition on. Connect the terminals of Yellow fuel pump check connector with a jumper wire. Fuel pump check connector is located on firewall, by airflow sensor on MPV and 929.
  2. Listen for fuel pump operating sound. If there is no sound, check main fuse, circuit operating relay, fuel pump and all electrical connections. On MPV and 929 models, airflow meter grounds circuit opening relay and operates fuel pump whenever air flow is present.
  3. Circuit opening relay and fuel pump relay on MPV are controlled by the computer. For additional testing see TESTS W/CODES or SYSTEM/COMPONENT TESTS article in the ENGINE PERFORMANCE section.
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