Nissan Maxima. Manual — part 381
EC-8
PRECAUTION . . . . . . . . . . .
PRECAUTIONS . . . . . . . . . . . ...
On Board Diagnostic (OBD) System of Engine
and CVT . . . . . . . . . . . . . . . .
General Precautions . . . . . . . . . . . ..
PREPARATION . . . . . . . . . . ..
PREPARATION . . . . . . . . . . . ...
Special Service Tools . . . . . . . . . . .
Commercial Service Tools . . . . . . . . . .
PERIODIC MAINTENANCE . . . . . ...
FUEL PRESSURE . . . . . . . . . . .
Inspection . . . . . . . . . . . . . . . ..
EVAP LEAK CHECK . . . . . . . . . .
Inspection . . . . . . . . . . . . . . . ..
SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . .
SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . . .
Idle Speed . . . . . . . . . . . . . . . .
Ignition Timing . . . . . . . . . . . . . ...
Calculated Load Value . . . . . . . . . . ..
DIAGNOSIS AND REPAIR WORK FLOW
EC-9
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Work Flow
INFOID:0000000010094770
OVERALL SEQUENCE
DETAILED FLOW
JSBIA0123GB
EC-10
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DIAGNOSIS AND REPAIR WORK FLOW
1.
GET INFORMATION FOR SYMPTOM
1. 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
.)
2. Ask if the customer requests I/M examination.
Malfunction information, obtained>>GO TO 2.
No malfunction information, but a request for I/M examination>>GO TO 13.
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 or GST.)
-
Erase DTC. (Refer to
EC-135, "On Board Diagnosis Function"
or
.)
-
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.
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
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
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
EC-540, "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?
YES
>> GO TO 10.
NO
>> Check according to
GI-41, "Intermittent Incident"
.
6.
PERFORM BASIC INSPECTION
Perform
DIAGNOSIS AND REPAIR WORK FLOW
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Will CONSULT be used?
YES
>> GO TO 7.
NO
>> GO TO 9.
7.
PERFORM “SPEC” OF “DATA MONITOR” MODE
With CONSULT
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 in “SPEC” of “DATA MONITOR” mode. Refer to
.
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
.
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
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 EC section 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
Is a malfunctioning part detected?
YES
>> GO TO 11.
NO
>> Monitor input data from related sensors or check voltage of related ECM terminals using CON-
SULT. Refer to
.
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 replace-
ment.
3. Check DTC. If DTC is displayed, erase it, refer to
EC-135, "On Board Diagnosis Function"
.
>> 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-1 >> No request for I/M examination from the customer: Before returning the vehicle to the customer,
always erase unnecessary DTC in ECM and TCM (Transmission Control Module). Refer to
135, "On Board Diagnosis Function"
or
NO-2 >> I/M examination, requested from the customer: GO TO 13.
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