LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2021 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Security Control System (Diagnostics) >> Symptom Diagnosis >> Security Control System >> Engine Does Not Start When Intelligent Key Is Inside Of Vehicle (One Key) >> Diagnosis Procedure >> Symptom Table (One Intelligent Key Has The Symptom, Other Keys Operate Normally)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Symptom Table (One Intelligent Key Has The Symptom, Other Keys Operate Normally)

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

OK

No crank, No start

No crank, No start

  1. CHECK INTELLIGENT KEY SYSTEM SYMPTOM TABLE 

    Check Intelligent Key system symptom table.

    Refer to Symptom Table .

    GO TO 2.

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

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    GO TO 3.

  3. 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 4.

  4. 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 .