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Home › Infiniti › 2014 › Q50 Base, AWD › Repair and Diagnosis › Engine Performance › System › Engine Control System - DTCS P1236 To P2138 (Except Hybrid) › DTC P1554: Battery Current Sensor › DTC Description › DTC Confirmation Procedure

DTC Confirmation Procedure

  1. PRECONDITIONING 

    TESTING CONDITION: 

    • Before performing the following procedure, confirm that battery voltage is more than 12.8 V at idle. 
    • Before performing the following procedure, confirm that all load switches and A/C switch are turned OFF. 

      : GO TO 2.

  2. PERFORM COMPONENT FUNCTION CHECK 
    NOTE: Use component function check to check the overall function of the battery current sensor circuit. During this check, a 1st trip DTC might not be confirmed.

    With CONSULT 

    1. Start engine and let it idle.
    2. Select "BAT CUR SEN" in "DATA MONITOR" mode with CONSULT.
    3. Check "BAT CUR SEN" indication for 10 seconds.

      "BAT CUR SEN" should be above 2, 300 mV at least once. 

    Without CONSULT 

    1. Start engine and let it idle.
    2. Check the voltage between ECM harness connector terminals as per the following.
      ECM Voltage (V)
      Connector + -
      Terminal Terminal
      F8 91 (Battery current sensor signal) 95 Above 2.3 at least once

      Is the inspection result normal? 

      YES-1: To check malfunction symptom before repair: Refer to "INTERMITTENT INCIDENT ".

      YES-2: Confirmation after repair: INSPECTION END

      NO: Proceed to "DIAGNOSIS PROCEDURE "

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