Nissan Quest E52. Manual - part 238

DIAGNOSIS AND REPAIR WORK FLOW

BRC-45

< BASIC INSPECTION >

[WITH VDC]

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORK FLOW

Work Flow

INFOID:0000000009651371

DETAILED FLOW

1.

INTERVIEW FROM THE CUSTOMER

Clarify customer complaints before inspection. First of all, perform an interview utilizing 

BRC-46, "Diagnostic

Work Sheet"

 and reproduce the symptom as well as fully understand it. Ask customer about his/her complaints

carefully. Check symptoms by driving vehicle with customer, if necessary.

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

BRC-37, "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 THE SELF-DIAGNOSIS

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 6.

4.

RECHECK THE SYMPTOM

With CONSULT

1.

Erase self-diagnostic results.

2.

Perform DTC confirmation procedures for the error-detected system.
NOTE:
If some DTCs are detected at the some time, determine the order for performing the diagnosis based on

BRC-37, "DTC Inspection Priority Chart"

 [ABS actuator and electric unit (control unit)].

Is any DTC detected?

YES

>> GO TO 5.

NO

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

GI-42,

"Intermittent Incident"

.

5.

REPAIR OR REPLACE ERROR-DETECTED PART

• Repair or replace error-detected parts.
• Reconnect part or connector after repairing or replacing.
• When DTC is detected, erase self-diagnostic result for “ABS”.

>> GO TO 7.

6.

IDENTIFY ERROR-DETECTED SYSTEM BY SYMPTOM DIAGNOSIS

Estimate error-detected system based on symptom diagnosis and perform inspection.
Can the error-detected system be identified?

BRC-46

< BASIC INSPECTION >

[WITH VDC]

DIAGNOSIS AND REPAIR WORK FLOW

YES

>> GO TO 7.

NO

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

GI-42,

"Intermittent Incident"

.

7.

FINAL CHECK

With CONSULT

1.

Check the reference value for “ABS”.

2.

Recheck the symptom and check that the symptom is not reproduced on the same conditions.

Is the symptom reproduced? 

YES

>> GO TO 3.

NO

>> INSPECTION END

Diagnostic Work Sheet

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Description

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

symptom and status well enough by asking the customer about his/her concerns 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

Engine

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 engine 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)

DIAGNOSIS AND REPAIR WORK FLOW

BRC-47

< BASIC INSPECTION >

[WITH VDC]

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Other conditions

Memo

Interview sheet

Customer 
name

MR/MS

Registration 
number

Initial year 
registration

Vehicle type

VIN

Storage date

Engine

Mileage

                 km (              Mile)

BRC-48

< BASIC INSPECTION >

[WITH VDC]

ADDITIONAL SERVICE WHEN REPLACING ABS ACTUATOR AND ELECTRIC 

UNIT (CONTROL UNIT)

ADDITIONAL SERVICE WHEN REPLACING ABS ACTUATOR AND ELEC-
TRIC UNIT (CONTROL UNIT)

Description

INFOID:0000000009651373

When replaced the ABS actuator and electric unit (control unit), Perform steering angle sensor neutral posi-
tion. Refer to 

BRC-49, "Work Procedure"

.