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Home >> Infiniti >> 2012 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1550 To P2A03 >> DTC P1550: Battery Current Sensor >> Component Inspection (Battery Current Sensor)
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Component Inspection (Battery Current Sensor)

  1. CHECK BATTERY CURRENT SENSOR
    1. Turn ignition switch OFF.
    2. Reconnect harness connectors disconnected.
    3. Disconnect battery negative cable.
    4. Install jumper cable between battery negative terminal and body ground.
    5. Turn ignition switch ON.
    6. Check the voltage between ECM harness connector terminals under the following conditions.
    Fig 1: Installing Jumper Cable Between Battery Negative Terminal And Body Ground
    G08260242Courtesy of NISSAN NORTH AMERICA, INC.
    ECM Voltage (V)
    Connector + -
    Terminal terminal
    E80 138 (Battery current sensor signal) 150 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.