Nissan Sentra. Manual — part 357
EC-124
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ENGINE CONTROL SYSTEM
AABIA0976GB
ENGINE CONTROL SYSTEM
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ABBIA1454GB
EC-126
< BASIC INSPECTION >
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DIAGNOSIS AND REPAIR WORKFLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow
INFOID:0000000009758396
OVERALL SEQUENCE
JSBIA0123GB
DIAGNOSIS AND REPAIR WORKFLOW
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DETAILED FLOW
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
>> 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 using CONSULT or GST.)
-
Erase DTC.
With CONSULT: “How to Erase DTC and 1st Trip DTC” in
.
Without CONSULT: “How to Erase Self-diagnostic Results” in
EC-63, "On Board Diagnosis Function"
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Study the relationship between the cause detected by DTC and the symptom described by the customer.
(Symptom Table is useful. Refer to
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. Refer to
and
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
and
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 make sure that DTC is
detected again.
If two or more DTCs are detected, refer to
EC-93, "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 on Service
Manual. 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 CONFIR-
MATION PROCEDURE.
Is DTC detected?
*1: Include 1st trip DTC.
*2: Include 1st trip freeze frame data.
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