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Home >> Infiniti >> 2011 >> M37 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1233 To P2A03 >> DTC P1556, P1557: Battery Temperature Sensor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK BATTERY TEMPERATURE SENSOR INPUT SIGNAL CIRCUIT-I
    1. Disconnect battery current sensor harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between battery current sensor hrness connector and ground.
      VOLTAGE REFERENCE

      Battery current sensor Ground Voltage (V)
      Connector Terminal
      E21 2 Ground Approx. 5 V

      Is the inspection result normal? 

      YES: GO TO  7.

      NO: GO TO 2.

  2. CHECK BATTERY TEMPERATURE SENSOR INPUT SIGNAL 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.
      CONTINUITY REFERENCE

      Battery current sensor ECM Continuity
      Connector Terminal Connector Terminal
      E21 2 F102 83 Existed

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair open circuit.

  3. CHECK SENSOR POWER SUPPLY CIRCUIT

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

    TERMINAL REFERENCE

    ECM Sensor
    Connector Terminal Name Connector Terminal
    F101 46 CKP sensor (POS) F2 1
    F102 64 CMP sensor (PHASE) (bank 2) F18 1
    Battery current sensor E21
    M107 103 APP sensor M153(1)
    M9(2)    		 3(1)
    6(2)
    107 EVAP control system pressure sensor B73 3
    Refrigerant pressure sensor E77 3
    (1) With ICC
    (2) Without ICC

    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 ".

    Is the inspection result normal? 

    YES: GO TO  9.

    NO: GO TO 6.

  6. REPLACE ACCELERATOR PEDAL ASSEMBLY

    Replace accelerator pedal assembly.

    INSPECTION END

  7. CHECK BATTERY TEMPERATURE 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 REFERENCE

      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 TEMPERATURE SENSOR

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

    Is the inspection result normal? 

    YES: GO TO 9.

    NO: Replace battery negative cable assembly.

  9. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

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