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Home >> Mazda >> 2017 >> 5 GT, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine Control >> Engine Control System Operation Inspection >> Fuel Pump Operation Inspection
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Fuel Pump Operation Inspection

  1. Remove the fuel-filler cap.
  2. Switch the ignition to ON.
  3. Turn the fuel pump relay from off to on using the FP PID and inspect if the operation sound is heard.
    • If no operation sounds is heard, proceed to next step.
  4. Measure the voltage at wiring harness side fuel pump connector terminal B.

    Specification 

    B+ (Ignition at on)

    • If the voltage is as specified, inspect the following:
    • Fuel pump continuity
    • Fuel pump GND
    • Wiring harness between fuel pump relay terminal E and PCM terminal 1BG
    • If not as specified, inspect the following:
    • Fuel pump relay (See RELAY INSPECTION .)
    • Wiring harness connector (Battery-Fuel pump relay-Fuel pump)
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