2023 Infiniti QX55 EssentialFACTORY OEM SERVICE PROCEDURE

Detailed Flow

  1. GET INFORMATION FOR SYMPTOM 

    Get the detailed information about symptom from customer.

    GO TO 2.

  2. CHECK DTC 

    SYMBOL With CONSULT

    1. Check DTC of "All DTC Reading".
    2. Perform the following procedure if DTC is displayed.
      • Record DTC and freeze frame data. (Or, write it down.)
    3. Check related service bulletins for information.

    Is any DTCs detected?

    YES

    Perform the trouble diagnosis for DTC indicated.

    NO

    GO TO 3.

  3. CONFIRM THE SYMPTOM 

    Try to confirm the symptom described by the customer.

    Also study the normal operation related to the symptom. Refer to Handling Precaution .

    GO TO 4.

  4. CHECK DRIVE MODE SWITCH CIRCUIT 

    Check drive mode switch circuit. Refer to Diagnosis Procedure .

    Is inspection result normal?

    YES

    GO TO 5.

    NO

    Repair / replace harness or connector.

  5. CHECK DRIVE MODE SWITCH AND METER INDICATION 
    1. Ignition switch OFF and wait at least 10 seconds.
    2. Ignition switch ON.
    3. Check that STANDARD is displayed on the information display screen of the combination meter.
    4. Check that the view of information display changes as STANDARD => SPORT => PERSONAL when switching the drive mode switch to up side.
    5. Check that the view of information display changes as PERSONAL => SPORT => STANDARD => ECO when switching the drive mode switch to down side.

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Check intermittent incident. Refer to Intermittent Incident .

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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