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Home >> Infiniti >> 2008 >> EX35 Base, RWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTCS P1217 To P2A03 >> P1550 Battery Current Sensor >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connection M95. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Repair or replace ground connection.

  2. CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT-I
    1. Disconnect battery current sensor harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between battery current sensor harness connector and ground.
      VOLTAGE SPECIFICATIONS

      Battery current sensor Ground Voltage (V)
      Connector Terminal
      E21 1 Ground Approx. 5

    Is the inspection result normal? 

    YES: GO TO  9.

    NO: GO TO 3.

  3. CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT-II
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between battery current sensor harness connector and ECM harness connector.
      CONTINUITY SPECIFICATIONS

      Battery current sensor ECM Continuity
      Connector Terminal Connector Terminal
      E21 1 F102 64 Existed

    Is the inspection result normal? 

    YES: GO TO  5.

    NO: GO TO 4.

  4. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors F1, E3
    • Harness for open between battery current sensor and ECM

    Repair open circuit.

  5. CHECK SENSOR POWER SUPPLY CIRCUIT

    Check harness for short to power and short to ground, between the following terminals.

    ECM SENSOR DESCRIPTION

    ECM Sensor
    Connector Terminal Name Connector Terminal
    F101 46 CKP sensor (POS) F2 1
    F102 64 CMP sensor (PHASE) (bank 2) F18 1
    EVT control position sensor (bank 2) F19 1
    Battery current sensor E21 1
    M107 103 APP sensor E112 6
    107 EVAP control system pressure sensor B252 3
    111 Refrigerant pressure sensor E77 3

    Is the inspection result normal? 

    YES: GO TO 6.

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

  6. CHECK COMPONENTS

    Check the following.

    Is the inspection result normal? 

    YES: GO TO 7.

    NO: Replace malfunctioning component.

  7. CHECK APP SENSOR

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO  14.

    NO: GO TO 8.

  8. REPLACE ACCELERATOR PEDAL ASSEMBLY
    1. Replace accelerator pedal assembly.
    2. Go to "SPECIAL REPAIR REQUIREMENT ".

    INSPECTION END

  9. CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between battery current sensor harness connector and ECM harness connector.
      CONTINUITY SPECIFICATIONS

      Battery current sensor ECM Continuity
      Connector Terminal Connector Terminal
      E21 2 F102 95 Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: GO TO  11.

    NO: GO TO 10.

  10. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors F1, E3
    • Harness for open or short between battery current sensor and ECM

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

  11. CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Check the continuity between battery current sensor harness connector and ECM harness connector.
      CONTINUITY SPECIFICATIONS

      Battery current sensor ECM Continuity
      Connector Terminal Connector Terminal
      E21 3 F102 91 Existed
    2. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: GO TO  13.

    NO: GO TO 12.

  12. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors F1, E3
    • Harness for open or short between battery current sensor and ECM

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

  13. CHECK BATTERY CURRENT SENSOR

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 14.

    NO: Replace battery negative cable assembly.

  14. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

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