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Home >> Nissan-Datsun >> 2010 >> Cube Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Component Testing >> Fuel Pump >> Diagnosis Procedure
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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.
    TERMINAL VOLTAGE REFERENCE CHART

    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 IDPDM E/R harness connector E13.
    3. Turn ignition switch ON.
    4. Check the voltage between IPDM E/R harness connector and ground.
      TERMINAL VOLTAGE REFERENCE CHART

      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.
    TERMINAL VOLTAGE REFERENCE CHART

    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.
      TERMINAL CONTINUITY REFERENCE CHART

      IPDM E/R Fuel level sensor unit and fuel pump Continuity
      Connector Terminal Connector Terminal
      E15 36 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.
      TERMINAL CONTINUITY REFERENCE CHART

      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".

  10. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: Replace IPDM E/R.

    NO: Repair or replace harness or connectors.

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