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Home >> Infiniti >> 2016 >> QX50 AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnostic Trouble Codes (DTCS) (P0447-P2138) >> DTC/Circuit Diagnosis >> DTC P1551, P1552: Battery Current Sensor Circuit Low/High Input >> Component Inspection >> Diagnostic Test
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Diagnostic Test

  1. CHECK BATTERY CURRENT SENSOR

    1. Turn ignition switch OFF.
    2. Reconnect harness connectors disconnected.
    3. Disconnect battery negative cable (1).
      G05207809Courtesy of NISSAN NORTH AMERICA, INC.
      ARROWF : To body ground
    4. Install jumper cable (A) between battery negative terminal and body ground.
    5. Turn ignition switch ON.
    6. Check the voltage between ECM harness connector terminals as per the following:
      ECM Voltage (V)
      Connector + -
      Terminal Terminal
      F102 91
      (Battery current sensor signal)
      95 Approx. 2.5

      Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to HOW TO HANDLE BATTERY .

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Replace battery negative cable assembly.