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Detailed Flow

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. GET INFORMATION FOR SYMPTOM

    Get the detailed information from the customer about the symptom (the condition and the environment when the incident/malfunction occurred) using the "Diagnostic Work Sheet". (Refer to "DIAGNOSTIC WORK SHEET ").

    : GO TO 2.

  2. CHECK DTC
    1. Check DTC.
    2. Perform the following procedure if DTC is displayed.
      • Record DTC and freeze frame data. (Print them out with CONSULT-III or GST.)
      • Erase DTC. (Refer to "DIAGNOSIS DESCRIPTION ").
      • Study the relationship between the cause detected by DTC and the symptom described by the customer. (Symptom Table is useful. Refer to "SYMPTOM TABLE ").
    3. Check related service bulletins for information.

    Are any symptoms described and any DTCs detected? 

    Symptom is described, DTC is displayed: GO TO 3.

    Symptom is described, DTC is not displayed: GO TO 4.

    Symptom is not described, DTC is displayed: GO TO 5.

  3. CONFIRM THE SYMPTOM

    Try to confirm the symptom described by the customer (except MIL ON).

    Also study the normal operation and fail-safe related to the symptom. Refer to "DESCRIPTION " and "FAIL SAFE ".

    Diagnosis Work Sheet is useful to verify the incident.

    Verify relation between the symptom and the condition when the symptom is detected.

    : GO TO 5.

  4. CONFIRM THE SYMPTOM

    Try to confirm the symptom described by the customer.

    Also study the normal operation and fail-safe related to the symptom. Refer to "DESCRIPTION " and "FAIL SAFE ".

    Diagnosis Work Sheet is useful to verify the incident.

    Verify relation between the symptom and the condition when the symptom is detected.

    : GO TO 6.

  5. PERFORM DTC CONFIRMATION PROCEDURE

    Perform DTC CONFIRMATION PROCEDURE for the displayed DTC, and then check that DTC is detected again.

    If two or more DTCs are detected, refer to "DTC INSPECTION PRIORITY CHART " and determine trouble diagnosis order.

    NOTE:
    • Freeze frame data is useful if the DTC is not detected.
    • Perform Component Function Check if DTC CONFIRMATION PROCEDURE is not included in this article. This simplified check procedure is an effective alternative though DTC cannot be detected during this check.

    If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC CONFIRMATION PROCEDURE.

    Is DTC detected? 

    YES: GO TO 10.

    NO: Check according to "INTERMITTENT INCIDENT ".

  6. PERFORM BASIC INSPECTION

    Perform "BASIC INSPECTION: SPECIAL REPAIR REQUIREMENT ".

    Will CONSULT-III be used? 

    YES: GO TO 7.

    NO: GO TO 9.

  7. PERFORM "SPEC" OF "DATA MONITOR" MODE

    With CONSULT-III

    Check that "MAS A/F SE-B1", "B/FUEL SCHDL", "A/F ALPHA-B1" and "A/F ALPHA-B2" are within the SP value using CONSULT-III in "SPEC" of "DATA MONITOR" mode. Refer to "COMPONENT FUNCTION CHECK ".

    Are they within the SP value? 

    YES: GO TO 9.

    NO: GO TO 8.

  8. DETECT MALFUNCTIONING PART BY TROUBLE DIAGNOSIS - SPECIFICATION VALUE

    Detect malfunctioning part according to "DIAGNOSIS PROCEDURE ".

    Is a malfunctioning part detected? 

    YES: GO TO 11.

    NO: GO TO 9.

  9. DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE

    Detect malfunctioning system according to "SYMPTOM TABLE " based on the confirmed symptom in step 4, and determine the trouble diagnosis order based on possible causes and symptoms.

    : GO TO 10.

  10. DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE

    Inspect according to Diagnostic Procedure of the system.

    NOTE: The Diagnostic Procedure in this article is described based on open circuit inspection. A short circuit inspection is also required for the circuit check in the Diagnostic Procedure. For details, refer to "Circuit Inspection" in "CIRCUIT INSPECTION ".

    Is a malfunctioning part detected? 

    YES: GO TO 11.

    NO: Monitor input data from related sensors or check voltage of related ECM terminals using CONSULT-III. Refer to "REFERENCE VALUE ".

  11. REPAIR OR REPLACE THE MALFUNCTIONING PART
    1. Repair or replace the malfunctioning part.
    2. Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replacement.
    3. Check DTC. If DTC is displayed, erase it, refer to "DIAGNOSIS DESCRIPTION ".

    : GO TO 12.

  12. FINAL CHECK

    When DTC was detected in step 2, perform DTC Confirmation Procedure or Overall Function Check again, and then check that the malfunction have been completely repaired.

    When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and check that the symptom is not detected.

    Is DTC detected and does symptom remain? 

    YES-1: DTC is detected: GO TO 10.

    YES-2: Symptom remains: GO TO 6.

    NO: Before returning the vehicle to the customer, always erase unnecessary DTC in ECM and TCM (Transmission Control Module). (Refer to "DIAGNOSIS DESCRIPTION "). If the completion of SRT is needed, drive vehicle under the specific DRIVING PATTERN in "HOW TO SET SRT CODE ".

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