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Home >> Infiniti >> 2018 >> QX80 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 255 (Security Control System (Diagnostics)) >> Symptom Diagnosis >> Security Control System >> Door Does Not Lock/Unlock And Engine Does Not Start (One I-Key/Req SW/Push SW) >> Diagnosis Procedure >> Symptom Table (One Intelligent Key Has The Symptom, Other Keys Operate Normally)
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Symptom Table (One Intelligent Key Has The Symptom, Other Keys Operate Normally)

WARNING: This page is about a different car, the 2020 Infiniti QX80. However, it is still accessible from the selected car via links, so may be relevant.

Door lock operation (remote keyless entry)

Door lock operation (request switch of front/rear/back door) or trunk/back door open operation (opener switch of trunk/back door panel)

Engine started with push-button ignition switch operation (Intelligent Key is within the detection area of inside key antenna)

Engine started with push-button ignition switch operation (registered Intelligent Key placed next to push-button ignition switch)

OK

NG

No crank, No start

OK
  1. CHECK INTELLIGENT KEY SYSTEM SYMPTOM TABLE 

    Check Intelligent Key system symptom table.

    Refer to Symptom Table .

    GO TO 2.

  2. CHECK INTELLIGENT KEY LOW BATTERY WARNING 

    Check that the Intelligent Key low battery warning operates.

    Is the Intelligent Key low battery warning operated?

    YES

    Replace Intelligent Key battery. Refer to INTELLIGENT KEY BATTERY : Removal & Installation .

    NO

    GO TO 3.

  3. CHECK INTELLIGENT KEY BATTERY 

    Check the Intelligent Key battery.

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Replace Intelligent Key battery. Refer to INTELLIGENT KEY BATTERY : Removal & Installation .

  4. REGISTER INTELLIGENT KEY 
    1. Register the Intelligent Key.
    2. Check operation after replacement.

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    GO TO 5.

  5. REPLACE INTELLIGENT KEY 
    1. Replace the Intelligent Key and perform registration again.
    2. Check operation after replacement.

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    GO TO 6.

  6. REPLACE BCM 
    1. Replace BCM. Refer to BCM : Removal & Installation .
    2. Check operation after replacement.

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Check intermittent incident. Refer to Inspection .

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