Nissan Sentra. Instruction — part 358
EC-128
< BASIC INSPECTION >
[MRA8DE]
DIAGNOSIS AND REPAIR WORKFLOW
YES
>> GO TO 10.
NO
>> Check according to
6.
PERFORM BASIC INSPECTION
Perform
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 SE-B1”, “B/FUEL SCHDL” and “A/F ALPHA-B1” are within the SP value using CON-
SULT in “SPEC” of “DATA MONITOR” mode. Refer to
EC-157, "Component Function Check"
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
.
Is 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 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. For details, refer to Circuit Inspection in
Is malfunctioning part detected?
YES
>> GO TO 11.
NO
>> Monitor input data from related sensors or check the 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 Diagnosis Procedure again after repair and replace-
ment.
3. Check DTC. If DTC is displayed, erase it. Refer to the following.
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"
>> GO TO 12.
12.
FINAL CHECK
When DTC was detected in step 2, perform DTC CONFIRMATION PROCEDURE or Component 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.
DIAGNOSIS AND REPAIR WORKFLOW
EC-129
< BASIC INSPECTION >
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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 ( With CONSULT: Refer to “How to Erase
DTC and 1st Trip DTC” in
, Without CONSULT: Refer to “How to
Erase Self-diagnostic Results” in
EC-63, "On Board Diagnosis Function"
). If the completion of
SRT is needed, drive vehicle under the specific driving pattern. Refer to
.
NO-2 >> I/M examination, requested from the customer: GO TO 13.
13.
PREPARE FOR I/M EXAMINATION
1. Set SRT codes. Refer to
2. Erase permanent DTCs. Refer to
.
>> INSPECTION END
Diagnostic Work Sheet
INFOID:0000000009758397
DESCRIPTION
There are many operating conditions that lead to the malfunction of
engine components. A good grasp of such conditions can make trou-
bleshooting faster and more accurate.
In general, each customer feels differently about a incident. It is
important to fully understand the symptoms or conditions for a cus-
tomer complaint.
Utilize a diagnostic worksheet like the one on the next page in order
to organize all the information for troubleshooting.
Some conditions may cause the MIL to come on steady or blink and
DTC to be detected. Examples:
Vehicle ran out of fuel, which caused the engine to misfire.
SEF907L
EC-130
< BASIC INSPECTION >
[MRA8DE]
DIAGNOSIS AND REPAIR WORKFLOW
WORKSHEET SAMPLE
MTBL0017
BASIC INSPECTION
EC-131
< BASIC INSPECTION >
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BASIC INSPECTION
Work Procedure
INFOID:0000000009758398
1.
INSPECTION START
1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for
scheduled maintenance.
2. Open engine hood and check the following:
-
Harness connectors for improper connections
-
Wiring harness for improper connections, pinches and cut
-
Vacuum hoses for splits, kinks and improper connections
-
Hoses and ducts for leaks
-
Air cleaner clogging
-
Gasket
3. Confirm that electrical or mechanical loads are not applied.
-
Headlamp switch is OFF.
-
Air conditioner switch is OFF.
-
Rear window defogger switch is OFF.
-
Steering wheel is in the straight-ahead position, etc.
4. Start engine and warm it up until engine coolant temperature
indicator points the middle of gauge.
Ensure engine stays below 1,000 rpm.
5. Run engine at about 2,000 rpm for about 2 minutes under no
load.
6. Make sure that no DTC is displayed with CONSULT or GST.
Is any DTC detected?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding Diagnostic Procedure.
>> GO TO 3.
3.
CHECK TARGET IDLE SPEED
1. Run engine at about 2,000 rpm for about 2 minutes under no load.
SEF983U
SEF976U
SEF977U
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