Infiniti QX56 (Z62). Manual - part 1113

POWER SUPPLY AND GROUND CIRCUIT

SCS-89

< DTC/CIRCUIT DIAGNOSIS >

[AIR LEVELIZER CONTROL SYSTEM]

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POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000006256088

1.

CHECK AIR LEVELIZER CONTROL MODULE IGNITION POWER SUPPLY CIRCUIT

1.

Disconnect air levelizer control module connector.

2.

Turn ignition switch ON. 

CAUTION:

Never start the engine.

3.

Check voltage between the air levelizer control module harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN AIR LEVELIZER CONTROL MODULE AND IPDM E/R

1.

Turn ignition switch OFF. 

2.

Disconnect IPDM E/R connector.

3.

Check continuity between air levelizer control module harness connector and IPDM E/R harness connec-
tor.

4.

Check continuity between air levelizer control module harness connector ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK IPDM E/R

Check the IPDM E/R. Refer to 

PCS-10, "Diagnosis Description"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-40, "Intermittent Incident"

.

NO

>> Repair or replace damaged parts.

Air levelizer control module

—

Voltage

Connector Terminal

B84

9

Ground

10 – 16 V

Air levelizer control module

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

B84

9

E10

5

Existed

Air levelizer control module

—

Continuity

Connector

Terminal

B84

9

Ground

Not existed

SCS-90

< DTC/CIRCUIT DIAGNOSIS >

[AIR LEVELIZER CONTROL SYSTEM]

CK SUSP INDICATOR LAMP CIRCUIT

CK SUSP INDICATOR LAMP CIRCUIT

Description

INFOID:0000000006256089

Air levelizer control module transmits CK SUSP indicator lamp signal to combination meter via CAN communi-
cation, when setting of standard vehicle height is incomplete. Based on the signal, combination meter turns
CK SUSP indicator lamp ON.

Component Function Check

INFOID:0000000006256090

1.

CHECK CK SUSP INDICATOR LAMP OPERATION

 CONSULT-III

1.

Turn ignition switch ON.

2.

Select “WARNING LAMP” in “Active Test” in “E-SUS”.

3.

While operating test item, check that the CK SUSP indicator lamp activates.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Refer to 

SCS-90, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006256091

1.

PERFORM SELF-DIAGNOSIS

 CONSULT-III

1.

Turn ignition switch ON.

2.

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

Are any DTC detected?

YES

>> Refer to 

SCS-59, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK COMBINATION METER

Check combination meter. Refer to 

MWI-29, "On Board Diagnosis Function"

.

Is the inspection result normal?

YES

>> Replace the air levelizer control module. Refer to 

SCS-94, "Removal and Installation"

.

NO

>> Repair or replace the combination meter. Refer to 

MWI-85, "Removal and Installation"

.

ON

: CK SUSP indicator lamp turns ON

OFF

: CK SUSP indicator lamp turns OFF

VEHICLE HEIGHT CANNOT BE RAISED

SCS-91

< SYMPTOM DIAGNOSIS >

[AIR LEVELIZER CONTROL SYSTEM]

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SYMPTOM DIAGNOSIS

VEHICLE HEIGHT CANNOT BE RAISED

Description

INFOID:0000000006256092

Vehicle height remains in low status.

Diagnosis Procedure

INFOID:0000000006256093

1.

CHECK APPEARANCE

Visually check for fuse, malfunction of suspension components, installation malfunction, or deformation of
vehicle height sensor.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repaire or replace damaged parts. 

2.

PERFORM SELF-DIAGNOSIS

1.

Turn ignition switch ON.

2.

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

Are any DTC detected?

YES

>> Refer to 

SCS-59, "DTC Index"

.

NO

>> GO TO 3.

3.

PERFORM STANDARD VEHICLE HEIGHT SETTING

Refer to 

SCS-67, "Work Procedure"

.

Is the symptom improved?

YES

>> INSPECTION END

NO

>> Replace the air levelizer control module. Refer to 

SCS-94, "Removal and Installation"

.

SCS-92

< SYMPTOM DIAGNOSIS >

[AIR LEVELIZER CONTROL SYSTEM]

VEHICLE HEIGHT CANNOT BE LOWERED

VEHICLE HEIGHT CANNOT BE LOWERED

Description

INFOID:0000000006256094

Vehicle height remains in high status.

Diagnosis Procedure

INFOID:0000000006256095

1.

CHECK APPEARANCE

Visually check for fuse, malfunction of suspension components, installation malfunction, or deformation of
vehicle height sensor.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repaire or replace damaged parts. 

2.

PERFORM SELF-DIAGNOSIS

1.

Turn ignition switch ON.

2.

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

Are any DTC detected?

YES

>> Refer to 

SCS-59, "DTC Index"

.

NO

>> GO TO 3.

3.

PERFORM STANDARD VEHICLE HEIGHT SETTING

Refer to 

SCS-67, "Work Procedure"

.

Is the symptom improved?

YES

>> INSPECTION END

NO

>> Replace the air levelizer control module. Refer to 

SCS-94, "Removal and Installation"

.