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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (DTC/Circuit Diagnosis) (3 Of 4) >> DTC/Circuit Diagnosis >> P1550 Battery Current Sensor >> Component Inspection (Main Battery Current Sensor)

Component Inspection (Main Battery Current Sensor)

  1. CHECK BATTERY CURRENT SENSOR 
    1. Turn ignition switch OFF.
    2. Disconnect main battery negative cable.
      GNSDB110293Courtesy of NISSAN NORTH AMERICA, INC.
    3. Install jumper cable between main battery negative terminal and body ground.
    4. Turn ignition switch ON.
    5. Check the voltage between ECM harness connector and ground.
      ECM Voltage(Approx.)
      Connector + -
      Terminal
      F51 56(Battery current sensor signal) 49(Sensor ground) 2.5 V*

      *: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to Work Flow .

    Is the inspection result normal?

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    INSPECTION END

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    Replace battery current sensor. Refer to Removal and Installation .