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Home >> Infiniti >> 2013 >> M56 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1087 To P2542 >> DTC P1553: Battery Current Sensor >> Diagnosis Procedure
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Diagnosis Procedure

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

      Is the inspection result normal? 

      YES: GO TO  7.

      NO: GO TO 2.

  2. CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT-II 
    1. Turn ignition switch ON.
    2. Disconnect ECM harness connector.
    3. Check the continuity between battery current sensor harness connector and ECM harness connector.
      Battery current sensor ECM Continuity
      Connector Terminal Connector Terminal
      E21 1 M160 133 Existed

      Is the inspection result normal? 

      YES: GO TO 31

      NO: Repair open circuit.

  3. CHECK SENSOR POWER SUPPLY CIRCUIT 

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

    ECM Sensor
    Connector Terminal Name Connector Terminal
    F111 76 CKP sensor F2 1
    77 Camshaft position sensor (bank 1) F84 1
    M160 133 Battery current sensor E21 1
    133 EVAP control system pressure sensor B73 3
    133 Refrigerant pressure sensor E77 3
    131 APP sensor 2 (Without ICC) M9 6
    131 APP sensor 2 (With ICC) M153 3

    Is the inspection result normal? 

    YES: GO TO 4.

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

  4. CHECK COMPONENTS 

    Check the following.

  5. CHECK APP SENSOR 

    Refer to "COMPONENT INSPECTION (ACCELERATOR PEDAL POSITION SENSOR) ".

    Is the inspection result normal? 

    YES: GO TO  10.

    NO: GO TO 6.

  6. REPLACE ACCELERATOR PEDAL ASSEMBLY 

    Replace accelerator pedal assembly.

  7. 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.
      Battery current sensor ECM Continuity
      Connector Terminal Connector Terminal
      E21 3 M160 150 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, short to ground or short to power in harness or connectors.

  8. 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.
      Battery current sensor ECM Continuity
      Connector Terminal Connector Terminal
      E21 4 M160 138 Existed
    2. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO 9.

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

  9. CHECK BATTERY CURRENT SENSOR 

    Refer to "COMPONENT INSPECTION (BATTERY CURRENT SENSOR) ".

    Is the inspection result normal? 

    YES: GO TO 10.

    NO: Replace battery negative cable assembly.

  10. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END