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Home >> Infiniti >> 2017 >> QX30 Luxury, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (1 Of 5) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> Fuel Pump Control Module (FPCM) >> Diagnosis Procedure
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Diagnosis Procedure

2WD models

  1. CHECK FUSE

    1. Turn ignition switch OFF.
    2. Check that the following fuse is not blown (open).
      Location Fuse No. Capacity
      Fuse and fusible link block 2 #63 25A
      #92 5A

    Are the fuses blown (open)?

    YES 

    Replace the fuse. [Check the power supply if fuse is blowing again.]

    NO 

    GO TO STEP 2  .

  2. CHECK FPCM GROUND CIRCUIT

    1. Disconnect FPCM harness connector.
    2. Check the continuity between FPCM harness connector and ground.
      + - Continuity
      FPCM
      Connector Terminal
      M456 9 Ground Existed

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair or replace error-detected parts.

  3. CHECK FPCM POWER SUPPLY

    1. Turn ignition switch ON.
    2. Check the voltage between FPCM harness connector and ground.
      + - Voltage
      FPCM
      Connector Terminal
      M456 10 Ground Battery voltage
      M135 5

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    GO TO STEP 4  .

  4. CHECK FPCM POWER SUPPLY CIRCUIT

    1. Disconnect fuse and fusible link block 2 harness connector.
    2. Check the continuity between FPCM harness connector and fuse and fusible link block 2 harness connector.
      + - Continuity
      FPCM Fuse and fusible link block 2
      Connector Terminal Connector Terminal
      M456 10 M120 47 Existed
      M135 5 M128 79
    3. Also check harness for short to ground.

    Is the inspection result normal?

    YES 

    Perform trouble diagnosis for power supply. Refer to WIRING DIAGRAM .

    NO 

    Repair or replace error-detected parts.

AWD models

  1. CHECK FUSE

    1. Turn ignition switch OFF.
    2. Check that the following fuse is not blown (open).
      Location Fuse No. Capacity
      Fuse and fusible link block 2 #63 25A
      #92 5A

    Are the fuses blown (open)?

    YES 

    Replace the fuse. [Check the power supply if fuse is blowing again.]

    NO 

    GO TO STEP 2  .

  2. CHECK FPCM GROUND CIRCUIT

    1. Disconnect FPCM harness connector.
    2. Check the continuity between FPCM harness connector and ground.
      + - Continuity
      FPCM
      Connector Terminal
      M365 14 Ground Existed

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair or replace error-detected parts.

  3. CHECK FPCM POWER SUPPLY

    1. Turn ignition switch ON.
    2. Check the voltage between FPCM harness connector and ground.
      + - Voltage
      FPCM
      Connector Terminal
      M136 6 Ground Battery voltage
      M365 13

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    GO TO STEP 4  .

  4. CHECK FPCM POWER SUPPLY CIRCUIT

    1. Disconnect fuse and fusible link block 2 harness connector.
    2. Check the continuity between FPCM harness connector and fuse and fusible link block 2 harness connector.
      + - Continuity
      FPCM Fuse and fusible link block 2
      Connector Terminal Connector Terminal
      M136 6 M128 79 Existed
      M365 13 M120 47
    3. Also check harness for short to ground.

    Is the inspection result normal?

    YES 

    Perform trouble diagnosis for power supply. Refer to WIRING DIAGRAM .

    NO 

    Repair or replace error-detected parts.

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