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 Can Not Start >> Diagnosis Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis Procedure

Engine does not start when push-button ignition switch is pressed.

SYMPTOM TABLE (BOTH INTELLIGENT KEYS HAVE THE SAME SYMPTOMS)

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 (registered 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 start

No start

CONDITIONS OF VEHICLE (OPERATING CONDITIONS)

"ENGINE START BY I-KEY" setting in "WORK SUPPORT" mode of "INTELLIGENT KEY" of "BCM" is ON.

  1. CHECK INTELLIGENT KEY SYSTEM SYMPTOM TABLE 

    Check Intelligent Key system symptom table.

    Refer to Symptom Table .

    GO TO 2.

  2. PERFORM SELF-DIAGNOSIS RESULT 

    Select "Self Diagnostic Result" mode of all systems, and check if DTC is detected.

    Follow troubleshooting for each DTC.