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Home >> Mazda >> 2025 >> CX-5 S Select >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine (VIN L) >> Engine Control System Operation Inspection >> Fuel Pump (Low-pressure Side) Control System Inspection >> If simulation function of M-MDS is used

If simulation function of M-MDS is used

  1. Connect the M-MDS to the DLC-2.
  2. Switch the ignition ON (engine off).
  3. Select the FP PID. (See ON-BOARD DIAGNOSTIC TEST [PCM (VIN L (WITHOUT CYLINDER DEACTIVATION))] .)
  4. Turn the fuel pump relay from off to on and inspect if the operation sound of the fuel pump relay is heard.
    • If no operation sound is heard, inspect the fuel pump relay. (See RELAY INSPECTION .)
    • If the fuel pump relay is normal, inspect the following:
      • Wiring harness and connectors (IG1 relay-Fuel pump relay-PCM terminal 2AW)
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