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Home >> Infiniti >> 2017 >> Q60 Base, RWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTCS) (2.0L Turbo) (4 Of 6) >> DTC/Circuit Diagnosis >> DTC P1540: Sub-Battery Current Sensor >> Component Inspection (Sub-Battery Current Sensor) >> Diagnostic Test
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Diagnostic Test

  1. CHECK SUB-BATTERY CURRENT SENSOR

    1. Turn Ignition Switch OFF.
    2. Reconnect harness connectors disconnected.
    3. Disconnect sub-battery negative cable.
    4. Install jumper cable between sub-battery negative terminal and body ground.
      G07051261Courtesy of NISSAN NORTH AMERICA, INC.
    5. Turn Ignition Switch ON.
    6. Check the voltage between EMCM harness connector terminals as per the following conditions.
      EMCM Voltage
      (Approx.)
      Connector + -
      Terminal
      M147 26 36 2.5 V*

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

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Replace Sub-Battery Current Sensor. Refer to REMOVAL AND INSTALLATION .

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