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Home >> Nissan-Datsun >> 2012 >> Versa SV >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Component Testing (Sedan) >> 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.
      ECM Voltage
      + -
      Connector Terminal Connector Terminal
      F10 23 16 108 Battery voltage

      Is the inspection result normal? 

      YES: GO TO  3.

      NO: GO TO 2.

  2. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II
    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R harness connector.
    3. Check the continuity between IPDM E/R harness connector and ECM harness connector.
      IPDM E/R ECM Continuity
      Connector Terminal Connector Terminal
      F43 43 F10 23 Existed
    4. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO  8.

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

  3. 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
      B44 1 Ground Battery voltage should for exist 1 second after ignition switch is turn ON.

      Is the inspection result normal? 

      YES: GO TO  6.

      NO: GO TO 4.

  4. CHECK FUSE
    1. Turn ignition switch OFF.
    2. Disconnect 15 A fuse (No. 48) from IPDM E/R.
    3. Check 15 A fuse.

      Is the inspection result normal? 

      YES: GO TO 5.

      NO: Replace 15 A fuse.

  5. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV
    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R harness connector.
    3. 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
      E44 9 B44 1 Existed
    4. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO 6.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

  6. CHECK FUEL PUMP GROUND CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Check the continuity between "fuel level sensor unit and fuel pump" harness connector and ground.
      Fuel level sensor unit and fuel pump Ground Continuity
      Connector Terminal
      B44 3 Ground Existed
    3. Also check harness for short to power.

      Is the inspection result normal? 

      YES: GO TO 7.

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

  7. CHECK FUEL PUMP

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 8.

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

  8. CHECK INTERMITTENT INCIDENT

    Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair open circuit, short to ground or short to power in harness or connectors.

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