Nissan Leaf. Manual - part 446

VCM

EVB-67

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AACIA0161GB

EVB-68

< WIRING DIAGRAM >

VCM

AACIA0162GB

DIAGNOSIS AND REPAIR WORK FLOW

EVB-69

< BASIC INSPECTION >

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORK FLOW

Work Flow

INFOID:0000000010121048

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 “Question sheet”. (Refer to 

EVB-70, "Diagnostic Work Sheet"

.)

>> GO TO 2.

2.

CHECK DTC IN VCM

1. Check DTC in VCM.

2. Check related service bulletins for information.
Are any DTCs detected?

YES

>> Check the DTC. Refer to 

EVC-102, "DTC Index"

.

NO

>> GO TO 3.

3.

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.)

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Erase DTC.

-

Study the relationship between the cause detected by DTC and the symptom described by the customer.

(Symptom Matrix Chart is useful. Refer to 

EVC-409, "Symptom Index"

.)

3. Check related service bulletins for information.
Are any symptoms described and any DTCs detected?

Symptom is described, DTC is detected>>GO TO 4.

Symptom is described, DTC is not detected>>GO TO 5.

Symptom is not described, DTC is detected>>GO TO 6.

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 

EVC-409, "Symptom Index"

and 

EVB-40, "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 6.

5.

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 

EVC-409, "Symptom Index"

and 

EVB-40, "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 7.

6.

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC CONFIRMATION PROCEDURE for the displayed DTC, and then check that DTC is detected

again.

NOTE:

• Freeze frame data is useful if the DTC is not detected.

EVB-70

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORK FLOW

• 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 8.

NO

>> Check according to 

GI-53, "Intermittent Incident"

.

7.

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE

Detect malfunctioning system according to 

EVC-409, "Symptom Index"

 based on the confirmed symptom in

step 4, and determine the trouble diagnosis order based on possible causes and symptoms.
Is the symptom described?

YES

>> GO TO 8.

NO

>> Monitor input data from related sensors using CONSULT.

8.

DETECT MALFUNCTIONING PART BY DIAGNOSIS PROCEDURE

Inspect according to Diagnosis Procedure of the system.
Is a malfunctioning part detected?

YES

>> GO TO 9.

NO

>> Monitor input data from related sensors using CONSULT.

9.

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.

>> GO TO 10.

10.

FINAL CHECK

When DTC was detected in step 3, 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 4 or 5, and check 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 5.

NO

>> Before returning the vehicle to the customer, always erase DTC.

Diagnostic Work Sheet

INFOID:0000000010121049

DESCRIPTION

There are many operating conditions that lead to the malfunction of

“EV battery system” 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 cus-

tomer complaint.

Utilize the diagnostic worksheet in order to organize all the informa-

tion for troubleshooting.

NOTE:

Some conditions may cause a DTC to be detected.

WORKSHEET SAMPLE

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