2022 Infiniti QX55 EssentialFACTORY OEM SERVICE PROCEDURE

Detailed Flow

  1. INTERVIEW FROM THE CUSTOMER 

    Clarify customer complaints before inspection. First of all, perform an interview utilizing Diagnostic Work Sheet  and reproduce the symptom as well as fully understand it. Ask customer about his/her complaints carefully. Check symptoms by driving vehicle with customer, if necessary.

    CAUTION: Customers are not professional. Never guess easily like "maybe the customer means that...," or " maybe the customer mentions this symptom".

    GO TO 2.

  2. CHECK SYMPTOM 

    Reproduce the symptom that is indicated by the customer, based on the information from the customer obtained by interview. Also check that the symptom is not caused by fail-safe mode. Refer to Fail-Safe .

    CAUTION: When the symptom is caused by normal operation, fully inspect each portion and obtain the understanding of customer that the symptom is not caused by a malfunction.

    GO TO 3.

  3. PERFORM SELF DIAGNOSTIC RESULT 

    SYMBOL CONSULT

    Select "Self Diagnostic Result" mode of "ABS".

    Is DTC detected?

    YES

    Record or print self-diagnosis results and freeze frame data (FFD). GO TO 4.

    NO

    GO TO 6.

  4. RECHECK SYMPTOM 

    SYMBOL CONSULT

    1. Erase "Self Diagnostic Result" mode of "ABS".
    2. Perform DTC confirmation procedures for the error-detected system.
      NOTE: If some DTCs are detected at the some time, determine the order for performing the diagnosis based on DTC Inspection Priority Chart .

    Is DTC detected?

    YES

    GO TO 5.

    NO

    Check harness and connectors based on the information obtained by interview. Refer to Intermittent Incident .

  5. REPAIR OR REPLACE ERROR-DETECTED PART 

    SYMBOL CONSULT

    1. Repair or replace error-detected parts.
    2. Reconnect part or connector after repairing or replacing.
    3. When DTC is detected, erase "Self Diagnostic Result" mode of "ABS".

    GO TO 7.

  6. IDENTIFY ERROR-DETECTED SYSTEM BY SYMPTOM DIAGNOSIS 

    Estimate error-detected system based on symptom diagnosis and perform inspection.

    Can the error-detected system be identified?

    YES

    GO TO 7.

    NO

    Check harness and connectors based on the information obtained by interview. Refer to Intermittent Incident .

  7. FINAL CHECK 

    SYMBOL CONSULT

    1. Check the reference value for "ABS".
    2. Recheck the symptom and check that the symptom is not reproduced on the same conditions.

    Is the symptom reproduced?

    YES

    GO TO 3.

    NO

    Inspection End.

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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