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Home >> Infiniti >> 2021 >> Q50 Pure, AWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control System (Diagnostics) >> Basic Inspection >> Brake Control System >> Diagnosis And Repair Work Flow >> Work Flow >> Detailed Flow
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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. Refer to Diagnostic Work Sheet .

    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 THE SELF-DIAGNOSIS 

    SYMBOL With CONSULT

    1. Turn the ignition switch OFF -> ON.
      CAUTION: Be sure to wait of 10 seconds after turning ignition switch OFF or ON.
    2. Perform self-diagnosis for "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 THE SYMPTOM 

    SYMBOL With CONSULT

    1. Erase self-diagnostic results for "ABS".
    2. Turn the ignition switch OFF -> ON -> OFF.
      CAUTION: Be sure to wait of 10 seconds after turning ignition switch OFF or ON.
    3. Perform Confirmation Procedure for the error-detected system.
      NOTE: If some DTCs are detected at the same 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 Inspection .

  5. REPAIR OR REPLACE ERROR-DETECTED PART 

    SYMBOL With 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 for "ABS".
      CAUTION:
      • Turn the ignition switch OFF -> ON -> OFF after erase self-diagnosis result.
      • Be sure to wait of 10 seconds after turning ignition switch OFF or ON.

    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 Inspection .

  7. FINAL CHECK 

    SYMBOL With 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

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