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Home >> Infiniti >> 2017 >> QX50 RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 4) >> DTC / Circuit Diagnosis >> DTC P1554: Battery Current Sensor >> Component Function Check >> Diagnostic Test
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Diagnostic Test

  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 STEP 2  .

  2. PERFORM COMPONENT FUNCTION CHECK

    G-20With 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. 

    G-21Without 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
      F102 91
      (Battery current sensor signal)
      95 Above 2.3 at least once

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Go to DIAGNOSIS PROCEDURE