Nissan Qashqai J11. Manual - part 496

EC9-140

< BASIC INSPECTION >

[R9M]

DIAGNOSIS AND REPAIR WORKFLOW

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

EC9-141, "Diagnostic Work

Sheet"

>> GO TO 2.

CHECK DTC

Check DTC.

Perform the following procedure if DTC is displayed.

Record DTC. (Print them out with CONSULT or GST.)

Erase DTC.

Study the relationship between the cause detected by DTC and the symptom described by the customer.
[Symptom Table or diagnosis procedure is useful. Refer to

EC9-397, "Symptom Table"

(for engine control

system) or

EC9-400, "Diagnosis Procedure"

(for stop/start system).]

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.

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer (except MIL ON).
Also study the fail safe related to the symptom. Refer to

EC9-101, "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.

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer.
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.

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC CONFIRMATION PROCEDURE for the displayed DTC.
If two or more DTCs are detected, refer to

EC9-107, "DTC Inspection Priority Chart"

and determine trouble

diagnosis order.
NOTE:
Perform Component Function Check if DTC CONFIRMATION PROCEDURE is not included on Service Man-
ual. 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 CONFIRMA-
TION PROCEDURE.
Is DTC detected?

YES

>> GO TO 8.

>> Check according to

GI-41, "Intermittent Incident"

PERFORM BASIC INSPECTION

Perform

EC9-137, "Work Procedure"

>> GO TO 7.

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE

Detect malfunctioning system according to

EC9-397, "Symptom Table"

(for engine control system) or

EC9-

400, "Diagnosis Procedure"

(for stop/start system) based on the confirmed symptom in step 4, and determine

the trouble diagnosis order based on possible causes and symptom.

DIAGNOSIS AND REPAIR WORKFLOW

EC9-141

< BASIC INSPECTION >

[R9M]

EC9

>> GO TO 8.

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

GI-43, "Circuit Inspec-

tion"

Is malfunctioning part detected?

YES

>> GO TO 9.

>> Monitor input data from related sensors or check voltage of related ECM terminals using CON-

SULT. Refer to

EC9-89, "Reference Value"

REPAIR OR REPLACE THE MALFUNCTIONING PART

Repair or replace the malfunctioning part.

Reconnect parts or connectors disconnected during Diagnosis Procedure again after repair and replace-
ment.

Check DTC. If DTC is displayed, erase it. Refer to

EC9-59, "Diagnosis Description"

>> GO TO 10.

10.

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?

YES-1 >> DTC is detected: GO TO 8.
YES-2 >> Symptom remains: GO TO 6.
NO

>> Before returning the vehicle to the customer, make sure to erase unnecessary DTC in ECM.

Diagnostic Work Sheet

INFOID:0000000010309015

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 and DTC to
be detected. Examples:
• Vehicle ran out of fuel, which caused the engine to misfire.
• Fuel filler cap was left off or incorrectly screwed on, allowing fuel to

evaporate into the atmosphere.

SEF907L