OVERALL SEQUENCE
*1: Include 1st trip DTC. *2: Include 1st trip freeze frame data.
DETAILED FLOW
1.GET INFORMATION FOR SYMPTOM
Malfunction information, obtained>>GO TO 2.
No malfunction information, but a request for I/M examination>>GO TO 13.
2.CHECK DTC
With CONSULT: "How to Erase DTC
and 1st Trip DTC" in EC, "CONSULT Function".
Without CONSULT: "How to Erase
Selfdiagnostic Results" in EC, "On Board Diagnosis Function".
(Symptom Table is useful. Refer to EC, "Symptom Table".)
3. Check related service bulletins for information.
Is any symptom described and is any DTC detected?
Symptom is described, DTC is detected>>GO TO 3.
Symptom is described, DTC is not detected>>GO TO 4.
Symptom is not described, DTC is detected>>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.
Diagnostic 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.
Diagnostic 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 make sure that DTC is detected again.
If two or more DTCs are detected, refer to EC, "DTC Inspection Priority Chart" and determine trouble diagnosis order.
NOTE:
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 GI, "Intermittent Incident".
6.PERFORM BASIC INSPECTION
Perform EC, "Work Procedure".
Do you have CONSULT?
YES >> GO TO 7.
NO >> GO TO 9.
7.PERFORM "SPEC" IN DATA MONITOR MODE
With CONSULT
Make sure that "MAS A/F SEB1", "B/FUEL SCHDL" and "A/F ALPHAB1" are within the SP value in "SPEC" of "DATA MONITOR" mode with CONSULT.
Is the measurement value 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 EC, "Diagnosis Procedure".
Is malfunctioning part detected?
YES >> GO TO 11.
NO >> GO TO 9.
9.DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE
Detect malfunctioning system according to EC, "Symptom Table" based on the confirmed symptom in step 4, and determine the trouble diagnosis order based on possible causes and symptom.
>> GO TO 10.
10.DETECT MALFUNCTIONING PART BY DIAGNOSIS PROCEDURE
Inspect according to Diagnosis Procedure of the system.
NOTE: The Diagnosis Procedure in EC section described based on open circuit inspection. A short circuit inspection is also required for the circuit check in the Diagnosis Procedure.
Is malfunctioning part detected?
YES >> GO TO 11.
NO >> Monitor input data from related sensors or check the voltage of related ECM terminals using CONSULT.
11.REPAIR OR REPLACE THE MALFUNCTIONING PART
With CONSULT: "How to Erase DTC
and 1st Trip DTC" in EC, "CONSULT Function".
Without CONSULT: "How to Erase
Selfdiagnostic Results" in EC, "On Board Diagnosis Function".
>> GO TO 12.
12.FINAL CHECK
When DTC was detected in step 2, perform DTC CONFIRMATION PROCEDURE or Component Function Check again, and then make sure that the malfunction have been repaired securely.
When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and make sure that the symptom is not detected.
Is DTC detected and does symptom remain?
YES1 >> DTC is detected: GO TO 10.
YES2 >> Symptom remains: GO TO 6.
NO1 >> No request for I/M examination from the customer: Before returning
the vehicle to the customer,
always erase unnecessary DTC in ECM and TCM (
With CONSULT: Refer to "How to
Erase
DTC and 1st Trip DTC" in EC, "CONSULT Function",
Without CONSULT: Refer to "How to
Erase Selfdiagnostic Results" in EC, "On Board Diagnosis Function").
NO2 >> I/M examination, requested from the customer: GO TO 13.
13.PREPARE FOR I/M EXAMINATION
>> INSPECTION END
DESCRIPTION
There are many operating conditions that lead to the malfunction of engine components. A good grasp of such conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about symptoms. It is important to fully understand the symptoms or conditions for a customer complaint.
Utilize a diagnostic worksheet like the WORKSHEET SAMPLE below in order to organize all the information for troubleshooting.
Some conditions may cause the MIL to illuminate or blink, and DTC to be detected. Examples:
WORKSHEET SAMPLE
Description When replacing ECM, the following procedure must be performed. PROGRAMMING OPERATION NOTE: After replacing with a blank ECM, programming is required to write ECM information. Be sur ...
Maintenance schedules
To help ensure smooth, safe and economical
driving, NISSAN provides two maintenance
schedules that may be used, depending upon the
conditions in which you usually drive. These
schedules contain both distance and time intervals,
up to 120,000 miles
(192,000 km)/144 months. For most people, the
...
Accelerator pedal released position
learning
Description
Accelerator Pedal Released Position Learning is a function of ECM to learn
the fully released position of the
accelerator pedal by monitoring the accelerator pedal position sensor output
signal. It must be performed each
time harness connector of accelerator pedal position senso ...