Infiniti QX56 (Z62). Manual - part 1107

DIAGNOSIS AND REPAIR WORKFLOW

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[AIR LEVELIZER CONTROL SYSTEM]

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

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DETAILED FLOW

1.

INTERVIEW FROM THE CUSTOMER

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

SCS-66, "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 

SCS-59, "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-III

Perform self-diagnosis for “E-SUS”.
Is any DTC detected?

YES

>> Record or print self-diagnosis results. GO TO 4.

NO

>> GO TO 6.

4.

RECHECK THE SYMPTOM

 With CONSULT-III

1.

Erase self-diagnostic results for “E-SUS”.

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

SCS-59, "DTC Inspection Priority Chart"

.

Is any DTC detected?

YES

>> GO TO 5.

NO

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

GI-40,

"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 “E-SUS”.

>> 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?

SCS-66

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[AIR LEVELIZER CONTROL SYSTEM]

DIAGNOSIS AND REPAIR WORKFLOW

YES

>> GO TO 7.

NO

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

GI-40,

"Intermittent Incident"

.

7.

FINAL CHECK

 With CONSULT-III

1.

Check the reference value for “E-SUS”.

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

INFOID:0000000006256059

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

Custmer 
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/day)

Climate con-
ditions

†

 Irrelevant

Weather

†

 Fine         

†

 Cloud           

†

 Rain           

†

 Snow        

†

 Others (                                       )

Temperature

†

 Hot          

†

 Warm           

†

 Cool           

†

 Cold           

†

 Temp. [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)

Memo

STANDARD VEHICLE HEIGHT SETTING

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STANDARD VEHICLE HEIGHT SETTING

Description

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Air levelizer control module enables precise control, by acquiring memorized standard vehicle height and sig-
nal (vehicle height) from vehicle height sensor. For this reason, always set standard vehicle height after per-
forming the following operations.
• Removal and installation or replacement of vehicle height sensor
• Replacement of air levelizer control module

Work Procedure

INFOID:0000000006256061

1.

CLEAR STANDARD VEHICLE HEIGHT

 With CONSULT-III

1.

Lift up the vehicle.

CAUTION:

Check that tires never contact the ground.

2.

Start the engine.

3.

Select “COMPRESSOR” in “Active Test” in “E-SUS”.

4.

Touch “ON” and wait 60 seconds or more.

5.

Touch “OFF”.

6.

Select “CLEAR HEIGHT INI” in “Work Support” in “E-SUS”.

7.

Touch “Start”.

8.

Touch “Clear”.
NOTE:
CONSULT-III continues indicating "EXECUTING". The completion of the standard vehicle height erasing
can be checked by the CK SUSP indicator lamp ON condition.

Does CK SUSP indicator lamp turn ON?

YES

>> GO TO 2.

NO

>> Perform step 1 again.

2.

ADJUST STANDARD VEHICLE HEIGHT

 With CONSULT-III

1.

Select “ADJUST HEIGHT INI” in “Work Support” in “E-SUS”.

2.

Touch “Start”.

3.

Touch “Initial 1”.
NOTE:
CONSULT-III continues indicating "EXECUTING". The completion of the standard vehicle height adjust-
ment can be checked by the CK SUSP indicator lamp OFF condition.

Does CK SUSP indicator lamp turn OFF?

YES

>> GO TO 3.

NO

>> Perform step 1 again.

3.

 ADJUST VEHICLE HEIGHT

 With CONSULT-III

1.

Lift down the vehicle.

CAUTION:

Check that the lift is fully lowered.

2.

Select “STANDARD HEIGHT LEVEL” in “Work Support” in “E-SUS”.

3.

Touch “Start”.

4.

Touch “Revert” and wait 120 seconds or more.

5.

Although CONSULT-III continues indicating "EXECUTING", select “VHCL HGT CNVSN VL” in “Data Mon-
itor” in “E-SUS”.

Is value within 

−

15 – 15 mm?

YES

>> GO TO 4.

NO

>> Perform step 1 again.

4.

CHECK DTC

 With CONSULT-III

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< BASIC INSPECTION >

[AIR LEVELIZER CONTROL SYSTEM]

STANDARD VEHICLE HEIGHT SETTING

Select “Self Diagnostic Results” in “E-SUS”.

Is any DTC detected?

YES

>> Refer to 

SCS-59, "DTC Index"

.

NO

>> SETTING END