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Home >> Nissan-Datsun >> 2011 >> Cube Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Introduction & DTC Index (Except For CALIFORNIA) >> Introduction & DTC Index >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connection E38. Refer to "CIRCUIT INSPECTION ".

      Is the inspection result normal? 

      YES: Go to 2.

      NO: Repair or replace ground connection.

  2. CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT
    1. Disconnect ECM harness connectors.
    2. Check the continuity between ECM harness connector and ground.
      CONTINUITY CHART

      ECM Ground Continuity
      Connector Terminal
      F7 11 Ground Existed
      E16 107
      108
      109
      112
    3. Also check harness for short to power.

      Is the inspection result normal? 

      YES: Go to  4.

      NO: Go to 3.

  3. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors F1, E8
    • Harness for open or short between ECM and ground

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

  4. CHECK ECM POWER SUPPLY CIRCUIT-I
    1. Reconnect ECM harness connectors.
    2. Turn ignition switch ON.
    3. Check the voltage between ECM harness connector and ground.
      VOLTAGE REFERENCE CHART

      ECM Ground Voltage
      Connector Terminal
      E16 93 Ground Battery voltage

      Is the inspection result normal? 

      YES: Go to  6.

      NO: Go to 5.

  5. DETECT MALFUNCTIONING PART

    Check the following.

    • 15 A fuse (No. 62)
    • Harness for open or short between ECM and fuse

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

  6. CHECK ECM POWER SUPPLY CIRCUIT-II
    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Turn ignition switch ON and then OFF.
    3. Check the voltage between ECM harness connector and ground.
      VOLTAGE REFERENCE CHART

      ECM Ground Voltage
      Connector Terminal
      E16 105 Ground After turning ignition switch OFF, battery voltage will exist for a few seconds, then drop approximately 0V.

      Is the inspection result normal? 

      YES: Go to 7.

      NO: Go to  9.

  7. CHECK ECM POWER SUPPLY CIRCUIT-III
    1. Turn ignition switch ON.
    2. Check the voltage between IPDM E/R harness connector and ground.
      VOLTAGE REFERENCE CHART

      IPDM E/R Ground Voltage
      Connector Terminal
      E14 44 Ground Battery voltage

      Is the inspection result normal? 

      YES: Go to 8.

      NO: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION " (With I-KEY) or "REMOVAL AND INSTALLATION " (Without I-KEY).

  8. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

  9. CHECK ECM POWER SUPPLY CIRCUIT-IV
    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Check the voltage between ECM harness connector and ground.
      VOLTAGE REFERENCE CHART

      ECM Ground Voltage
      Connector Terminal
      F7 32 Ground Battery voltage

      Is the inspection result normal? 

      YES: Go to  13.

      NO: Go to 10.

  10. CHECK ECM POWER SUPPLY CIRCUIT-V
    1. Disconnect ECM harness connector.
    2. Disconnect IPDM E/R harness connector E14.
    3. Check the continuity between ECM harness connector and IPDM E/R harness connector.
      CONTINUITY CHART

      ECM IPDM E/R Continuity
      Connector Terminal Connector Terminal
      F7 32 E14 40 Existed
    4. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: Go to  12.

      NO: Go to 11.

  11. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness 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.

  12. CHECK FUSE
    1. Disconnect 20 A fuse (No. 43) from IPDM E/R.
    2. Check 20 A fuse.

      Is the inspection result normal? 

      YES: Go to  15.

      NO: Replace 20 A fuse.

  13. CHECK ECM POWER SUPPLY CIRCUIT-VI
    1. Disconnect ECM harness connector.
    2. Disconnect IPDM E/R harness connector E14.
    3. Check the continuity between ECM harness connector and IPDM E/R harness connector.
      CONTINUITY CHART

      ECM IPDM E/R Continuity
      Connector Terminal Connector Terminal
      E16 105 E14 43 Existed
    4. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: Go to  15.

      NO: Go to 14.

  14. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness 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.

  15. 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) or "REMOVAL AND INSTALLATION " (Without I-KEY).

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

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