2012 Nissan-Datsun Cube BaseFACTORY OEM SERVICE PROCEDURE

Diagnosis Procedure

  1. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between ECM harness connector and ground.
      ECM Ground Voltage
      Connector Terminal
      F7 23 Ground Battery voltage

      Is the inspection result normal? 

      YES >> GO TO  4.

      NO >> GO TO 2.

  2. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R harness connector E13.
    3. Turn ignition switch ON.
    4. Check the voltage between IPDM E/R harness connector and ground.
      IPDM E/R Ground Voltage
      Connector Terminal
      E13 31 Ground Battery voltage

      Is the inspection result normal? 

      YES >> GO TO  4.

      NO >> GO TO 3.

  3. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness or connectors E8, F1
    • Harness for open or short between ECM and IPDM E/R

      >> Repair open circuit or short to ground or short to power in harness or connectors.

  4. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III
    1. Turn ignition switch OFF.
    2. Reconnect all harness connectors disconnected.
    3. Disconnect "fuel level sensor unit and fuel pump" harness connector.
    4. Turn ignition switch ON.
    5. Check the voltage between "fuel level sensor unit and fuel pump" harness connector and ground.
      Fuel level sensor unit and fuel pump Ground Voltage
      Connector Terminal
      B40 1 Ground Battery voltage should exist 1 second after ignition switch is turn ON.

      Is the inspection result normal? 

      YES >> GO TO  8.

      NO >> GO TO 5.

  5. CHECK FUSE
    1. Turn ignition switch OFF.
    2. Disconnect 15 A fuse (No. 60) from IPDM E/R.
    3. Check 15 A fuse.

      Is the inspection result normal? 

      YES >> GO TO 6.

      NO >> Replace 15 A fuse.

  6. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV
    1. Disconnect IPDM E/R harness connector E15.
    2. Check the continuity between IPDM E/R harness connector and "fuel level sensor unit and fuel pump" harness connector.
      IPDM E/R Fuel level sensor unit and fuel pump Continuity
      Connector Terminal Connector Terminal
      E15 55 B40 1 Existed
    3. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES >> GO TO  10.

      NO >> GO TO 7.

  7. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors B1, M18
    • Harness connectors M77, E105
    • Harness for open or short between IPDM E/R and "fuel level sensor unit and fuel pump"

      >> Repair open circuit or short to power in harness or connectors.

  8. CHECK FUEL PUMP GROUND CIRCUIT
    1. Check the continuity between "fuel level sensor unit and fuel pump" and ground.
      Fuel level sensor unit and fuel pump Ground Continuity
      Connector Terminal
      B40 3 Ground Existed
    2. Also heck harness for short to power.

      Is the inspection result normal? 

      YES >> GO TO 9.

      NO >> Repair open circuit or short to power in harness or connectors.

  9. CHECK FUEL PUMP

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES >> GO TO 10.

    NO >> Replace "fuel level sensor unit and fuel pump". Refer to "EXPLODED VIEW ".

  10. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES >> Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION " (With I-KEY), "REMOVAL AND INSTALLATION " (Without I-KEY).

    NO >> Repair or replace harness or connectors.

Factory Service Tools

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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.

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