Infiniti QX56 (JA60). Manual - part 809

 

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Infiniti QX56 (JA60). Manual - part 809

 

 

SCS-1

SUSPENSION

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SECTION 

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CONTENTS

SUSPENSION CONTROL SYSTEM

BASIC INSPECTION  ....................................

3

DIAGNOSIS AND REPAIR WORKFLOW  ..........

3

Work Flow  .................................................................

3

FUNCTION DIAGNOSIS ...............................

5

SUSPENSION CONTROL SYSTEM ...................

5

System Diagram ........................................................

5

System Description  ...................................................

5

Component Parts Location ........................................

6

Component Description .............................................

6

DIAGNOSIS SYSTEM (SUSPENSION CON-
TROL UNIT) .........................................................

7

CONSULT-III Function  ..............................................

7

COMPONENT DIAGNOSIS  ..........................

9

C1801 VEHICLE HEIGHT SENSOR  ...................

9

Description ................................................................

9

DTC Logic  .................................................................

9

Diagnosis Procedure ................................................

9

C1802 COMPRESSOR RELAY  .........................

10

Description ..............................................................

10

DTC Logic  ...............................................................

10

Diagnosis Procedure ..............................................

10

C1803 EXHAUST SOLENOID  ...........................

11

Description ..............................................................

11

DTC Logic  ...............................................................

11

Diagnosis Procedure ..............................................

11

C1804 HEIGHT ADJUSTING MALFUNCTION 
(COMPRESSOR) ................................................

12

Description ..............................................................

12

DTC Logic  ...............................................................

12

Diagnosis Procedure ..............................................

12

C1805 HEIGHT ADJUSTING MALFUNCTION 
(EXH SOLENOID)  ..............................................

13

Description ...............................................................

13

DTC Logic ................................................................

13

Diagnosis Procedure ..............................................

13

C1806 VEHICLE HEIGHT SENSOR LOCK-
ING MALFUNCTION .........................................

14

Description ...............................................................

14

DTC Logic ................................................................

14

Diagnosis Procedure  ...............................................

14

C1807 SENSOR 5V MALFUNCTION  ...............

15

Description ...............................................................

15

DTC Logic ................................................................

15

Diagnosis Procedure ..............................................

15

C1808 INTEGRAL TIME MALFUNCTION 
SUPPLYING AIR ...............................................

16

Description ...............................................................

16

DTC Logic ................................................................

16

Diagnosis Procedure ..............................................

16

POWER SUPPLY AND GROUND CIRCUIT  ....

17

SUSPENSION CONTROL UNIT ................................

17

SUSPENSION CONTROL UNIT : Diagnosis Pro-
cedure ......................................................................

17

SUSPENSION AIR COMPRESSOR ..........................

17

SUSPENSION AIR COMPRESSOR : Diagnosis 
Procedure ................................................................

17

HEIGHT SENSOR ......................................................

18

HEIGHT SENSOR : Diagnosis Procedure  ..............

18

COMPRESSOR MOTOR RELAY  .....................

20

Description ...............................................................

20

Component Function Check  ....................................

20

Diagnosis Procedure  ...............................................

20

HEIGHT SENSOR SIGNAL CIRCUIT ...............

23

Description ...............................................................

23

Component Function Check  ....................................

23

Diagnosis Procedure  ...............................................

23

SCS-2

EXHAUST VALVE SOLENOID CIRCUIT ..........

24

Description ..............................................................

24

Component Function Check  ...................................

24

Diagnosis Procedure  ..............................................

24

CK SUSP WARNING INDICATOR CONTROL 
CIRCUIT .............................................................

26

Description ..............................................................

26

Component Function Check  ...................................

26

Diagnosis Procedure  ..............................................

26

ECU DIAGNOSIS  ........................................

28

SUSPENSION CONTROL UNIT ........................

28

Reference Value .....................................................

28

Wiring Diagram  .......................................................

29

DTC Index  ..............................................................

34

SYMPTOM DIAGNOSIS  .............................

36

SUSPENSION CONTROL SYSTEM  .................

36

Symptom Table  ......................................................

36

SUSPENSION CONTROL SYSTEM INOPER-
ATIVE .................................................................

37

Description ..............................................................

37

Diagnosis Procedure ...............................................

37

SUSPENSION CONTROL SYSTEM DOES 
NOT RAISE ........................................................

38

Description ..............................................................

38

Diagnosis Procedure ...............................................

38

SUSPENSION CONTROL SYSTEM DOES 
NOT LOWER  .....................................................

39

Description ..............................................................

39

Diagnosis Procedure ...............................................

39

PRECAUTION ............................................

40

PRECAUTIONS  .................................................

40

Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................

40

Precaution for Rear Suspension  .............................

40

DIAGNOSIS AND REPAIR WORKFLOW

SCS-3

< BASIC INSPECTION >

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000005148145

OVERALL SEQUENCE

DETAILED FLOW

ALEIA0041GB

SCS-4

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

1.

INTERVIEW FOR MALFUNCTION

Interview the customer about the symptom.

>> GO TO 2.

2.

SYMPTOM CHECK

Verify the symptom from the customer's information.

>> GO TO 3.

3.

BASIC INSPECTION

Check the operation of each part. Check that no symptoms occur other than those specified by the customer.

>> GO TO 4.

4.

SELF-DIAGNOSIS WITH CONSULT-III

Perform the self diagnosis with CONSULT-III. Check that any DTC is detected.
Is any DTC detected?

YES

>> GO TO 5.

NO

>> GO TO 6.

5.

TROUBLE DIAGNOSIS BY DTC

Perform the trouble diagnosis for the detected DTC. Specify the malfunctioning part.

>> GO TO 7.

6.

SYMPTOM DIAGNOSIS

Perform the symptom diagnosis. Specify the malfunctioning part.

>> GO TO 7.

7.

MALFUNCTIONING PART REPAIR

Repair or replace the malfunctioning part.

>> GO TO 8.

8.

REPAIR CHECK (SELF-DIAGNOSIS WITH CONSULT-III)

Perform the self diagnosis with CONSULT-III. Verfied that no DTCs are detected. Erase all DTCs detected

prior to the repair. Verify that DTC is not detected again.
Is any DTC detected?

YES

>> GO TO 5.

NO

>> GO TO 9.

9.

REPAIR CHECK (OPERATION CHECK)

Check the operation of each part.
Does it operate normally?

YES

>> Inspection End.

NO

>> GO TO 3.

 

 

 

 

 

 

 

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