Nissan Leaf. Manual - part 182

DIAGNOSIS AND REPAIR WORK FLOW

BR-49

< BASIC INSPECTION >

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORK FLOW

Work Flow

INFOID:0000000010122999

DETAILS OF TROUBLE DIAGNOSIS FLOWCHART

1.

COLLECT THE INFORMATION FROM THE CUSTOMER

It is also important to clarify customer concerns before starting the inspection. First of all, perform an interview

utilizing 

BR-50, "Diagnostic Work Sheet"

 and reproduce the symptom as well as fully understand it. Depending

on the situations, drive the vehicle with the customer and check the symptom.

CAUTION:

Customers are not professional. Never guess easily like “maybe the customer means that...,” or

“maybe the customer mentions this symptom”.

>> GO TO 2.

2.

CHECK SYMPTOM

Reproduce the symptom that is indicated by the customer, based on the information from the customer

obtained by the interview. Also check that the symptom is not caused by fail-safe mode. Refer to 

BR-16, "Fail-

Safe"

.

CAUTION:

When the symptom is caused by normal operation, fully inspect each portion and obtain the under-

standing of customer that the symptom is not caused by a malfunction.

>> GO TO 3.

3.

PERFORM SELF-DIAGNOSIS (1)

With CONSULT

Perform self-diagnosis.
Is DTC detected?

YES

>> Record or print self-diagnosis results and freeze frame data (FFD). GO TO 4.

NO

>> GO TO 7.

4.

PERFORM SELF-DIAGNOSIS (2)

With CONSULT

1. Turn the power switch OFF to ON without depressing the brake pedal.

CAUTION:

Never set the vehicle to READY.

2. Repeat step 1 two or more times.

CAUTION:

Be sure to wait for 5 seconds or more after turning the power switch OFF.

3. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.

4. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for

3 minutes or more with all doors closed.

CAUTION:

Never operate the vehicle while waiting.

5. Turn the power switch ON without depressing the brake pedal.

CAUTION:

Never set the vehicle to READY.

6. Start CONSULT and erase self-diagnosis result of “BRAKE”.

7. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.

8. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for

3 minutes or more with all doors closed.

CAUTION:

Never operate the vehicle while waiting.

9. Turn the power switch ON without depressing the brake pedal.

CAUTION:

BR-50

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORK FLOW

Never set the vehicle to READY.

10. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more.

11. Release brake pedal.

12. Start CONSULT and perform “BRAKE” self-diagnosis.
Is DTC detected?

YES

>> Record or print self-diagnosis results. GO TO 5.

NO

>> GO TO 7.

5.

RECHECK SYMPTOM

With CONSULT

1. Erase self-diagnosis results from the memory.

2. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.

3. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for

3 minutes or more with all doors closed.

CAUTION:

Never operate the vehicle while waiting.

4. Perform DTC reproduction procedures for the system that is malfunctioning.

NOTE:

When multiple DTCs are detected, refer to 

BR-37, "DTC Inspection Priority Chart"

 and then determine the

order for performing the diagnosis.

Is DTC detected?

YES

>> GO TO 6.

NO

>> Check harness and connectors based on the information obtained by the interview. Refer to 

GI-

53, "Intermittent Incident"

.

6.

REPAIR OR REPLACE ERROR-DETECTED PART

1. Repair or replace the part that is malfunctioning. Reconnect part or connector after repairing or replacing.

Erase DTC from the memory when DTC is detected.

2. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector.

3. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for

3 minutes or more with all doors closed.

CAUTION:

Never operate the vehicle while waiting.

>> GO TO 7.

7.

IDENTIFY ERROR-DETECTED SYSTEM BY SYMPTOM DIAGNOSIS

Estimate which system is malfunctioning according to the possible symptoms based on symptom diagnosis

and perform check.
Can the malfunctioning part be identified?

YES

>> GO TO 8.

NO

>> Check harness and connectors based on the information obtained by the interview. Refer to 

GI-

53, "Intermittent Incident"

.

8.

FINAL CHECK

With CONSULT

1. Check the reference value for “BRAKE”. Refer to 

BR-33, "Reference Value"

.

2. Perform the operation check. Check that the symptom is not reproduced under the same conditions as

when the symptom is reproduced before.

Is the symptom reproduced? 

YES

>> GO TO 3.

NO

>> INSPECTION END

Diagnostic Work Sheet

INFOID:0000000010123000

Description

DIAGNOSIS AND REPAIR WORK FLOW

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• In general, customers have their own criteria for a symptom. Therefore, it is important to understand the

symptom and status well enough by interviewing the customer about the symptom carefully. To systemize all

the information for the diagnosis, prepare the interview sheet referring to the interview points.

• In some cases, multiple conditions that appear simultaneously may cause a DTC to be detected.

INTERVIEW SHEET SAMPLE

Interview sheet

Customer 
name

MR/MS

Registration 
number

Initial year 
registration

Vehicle type

VIN

Storage date

Traction mo-
tor

Mileage

                 km (              Mile)

Symptom

†

 Does not operate (                                                                                                  ) function

†

 Warning lamp for (                                                                                                 ) turns ON.

†

 Noise

†

 Vibration

†

 Other

(                                                                                                                                                 )

First occurrence

†

 Recently        † Other (                                                                                                       )

Frequency of occurrence

†

 Always          †  Under a certain conditions of           † Sometimes (              time(s)/day)

Climate con-
ditions

†

 Irrelevant

Weather

†

 Fine         † Cloud           † Rain           †Snow        † Others (                                       )

Temperature

†

 Hot        †Warm         † Cool         † Cold          † Temperature [Approx.      

°C (        °F)]

Relative humidity

†

 High                  † Moderate                    † Low

Road conditions

†

 Urban area             † Suburb area                    † Highway              

†

 Mountainous road (uphill or downhill)                † Rough road

Operating condition, etc.

†

Irrelevant

†

When traction motor starts          † During idling

†

 During driving            † During acceleration             † At constant speed driving              

†

 During deceleration

†

 During cornering (right curve or left curve)

†

 When steering wheel is steered (to right or to left)

Other conditions

Memo

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ADDITIONAL SERVICE WHEN REPLACING ELECTRICALLY-DRIVEN INTELLI-

GENT BRAKE UNIT

ADDITIONAL SERVICE WHEN REPLACING ELECTRICALLY-DRIVEN IN-
TELLIGENT BRAKE UNIT

Description

INFOID:0000000010123001

When the electrically-driven intelligent brake unit was replaced, perform stroke sensor 0 point learning. 

BR-53,

"Work Procedure"

.