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HOMESERVICE MANUALSNISSAN-DATSUN2024FRONTIER SL, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM (DTC/CIRCUIT DIAGNOSIS) (5 OF 6)DTC/CIRCUIT DIAGNOSISDTC P1220: FUEL PUMP CONTROL MODULE (FPCM)DIAGNOSIS PROCEDURE
2024 Nissan-Datsun Frontier SL, RWD

Diagnosis Procedure

2024 Nissan-Datsun Frontier SL, RWDSECTION Diagnosis Procedure
  1. CHECK FUSE 
    1. Turn ignition switch OFF.
    2. Check that the following fuse is not blowing.
      Location Fuse No. Capacity
      IPDM E/R No. 34 15 A

    Is the fuse blown (open)?

    >>

    Replace the fuse after repairing the applicable circuit.

    >>

    GO TO 2.

  2. CHECK FPCM POWER SUPPLY 
    1. Turn ignition switch OFF.
    2. Disconnect FPCM harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between FPCM harness connector and ground.
      + - Voltage
      FPCM
      Connector Terminal
      C2 1 Ground Battery voltage

    Is the inspection result normal?

    >>

    GO TO 4.

    >>

    GO TO 3.

  3. CHECK FPCM POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R harness connector.
    3. Check the continuity between FPCM harness connector and IPDM E/R harness connector.
      FPCM IPDM E/R Continuity
      Connector Terminal Connector Terminal
      C2 1 E119 10 Existed
    4. Also check harness for short to power and short to ground.

    Is the inspection result normal?

    >>

    Perform trouble diagnosis for power supply circuit.

    >>

    Repair or replace error-detected parts.

  4. CHECK FPCM GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Check the continuity between FPCM harness connector and ground.
      FPCM - Continuity
      Connector Terminal
      C2 4 Ground Existed
    3. Also check harness for short to power.

    Is the inspection result normal?

    >>

    GO TO 5.

    >>

    Repair or replace error-detected parts.

  5. CHECK FPCM INPUT AND OUTPUT CIRCUIT 
    1. Disconnect ECM harness connector.
    2. Check the continuity between FPCM harness connector and ECM harness connector.
      FPCM ECM Continuity
      Connector Terminal Connector Terminal
      C2 3 E16 182 Existed
      2 188
    3. Also check harness for short to power and short to ground.

    Is the inspection result normal?

    >>

    GO TO 6.

    >>

    Repair or replace error-detected parts.

  6. CHECK FUEL PUMP CONTROL CIRCUIT 
    1. Disconnect "fuel level sensor unit and fuel pump (main)" harness connector.
    2. Check the continuity between FPCM harness connector and "fuel level sensor unit and fuel pump (main)" harness connector.
      FPCM Fuel level sensor unit and fuel pump (main) Continuity
      Connector Terminal Connector Terminal
      C2 5 C3 4 Existed
      6 6
    3. Also check harness for short to power and short to ground.

    Is the inspection result normal?

    >>

    GO TO 7.

    >>

    Repair or replace error-detected parts.

  7. CHECK FPCM 

    Refer to Component Inspection (FPCM) .

    Is the inspection result normal?

    >>

    INSPECTION END

    >>

    Replace FPCM. Refer to Removal and Installation .

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.