Infiniti QX56 (Z62). Manual - part 1098

DIFFERENCE IN APPEARANCE

SCS-29

< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

DIFFERENCE IN APPEARANCE

Description

INFOID:0000000006256016

While the vehicle is stopped, the difference of vehicle height of right side and left side (between wheel center
and wheel arch) is 25 mm (0.98 in) or more.

Inspection Procedure

INFOID:0000000006256017

1.

CHECK APPEARANCE

1.

Visually check that the exterior parts (e.g. suspension spring) have no malfunctions.

2.

Visually check tube and pipe for crush or oil leakage.

Is the check result normal?

YES

>> GO TO 2.

NO

>> Repair or replace damaged parts.

2.

CHECK CLOGGING OF ORIFICE IN PPMU

1.

Install an oil pressure gauge (SST: KV40108000) (A) to oil injec-
tion jack. 

CAUTION:

• Clean surrounding areas of oil injection jack using steam

before starting operation, since there may be mud on it.

• Clean oil pressure gauge (special service tool:

KV40108000) jack with steam before use.

• Jack must be securely inserted until a click sound can be

heard.

• Pressure reducing valve (B) of the oil pressure gauge

must be closed.

2.

Loosen needle valves A and C of PPMU by approximately 2
rotations for check changes in vehicle height.

CAUTION:

Never loosen the needle valve more than required.

3.

Tighten needle valve A and C of PPMU to the specified torque
after the inspection.

Does the vehicle height change 10 mm (0.39 in) or more?

YES

>> For detailed inspection of clogging of orifice in PPMU,

refer to 

SCS-27, "Work Procedure"

.

NO

>> INSPECTION END

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Tightening torque

: 8.3 N·m (0.85 kg-m, 73 in-lb)

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SCS-30

< SYMPTOM DIAGNOSIS >

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LARGE ROLL ANGLE

LARGE ROLL ANGLE 

Description

INFOID:0000000006256018

During cornering, inclination of the vehicle to outer side of corner is large.

Inspection Procedure

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1.

CHECK APPEARANCE

1.

Visually check that the exterior parts (e.g. suspension spring) have no malfunctions.

2.

Visually check tube and pipe for crush or oil leakage.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace damaged parts.

2.

CHECK NEEDLE VALVE OF PPMU

Check that needle valves A and C are tightened to the specified
torque.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Tighten to the specified torque.

3.

SYSTEM PRESSURE CHECK

Check system pressure. Refer to 

SCS-15, "Work Procedure"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Perform adjustment of system pressure. Refer to 

SCS-18, "Work Procedure"

.

4.

CHECK INTERNAL LEAKAGE

Check internal leakage. Refer to 

SCS-20, "Work Procedure"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 5.

5.

CHECK MALFUNCTIONING PART

Identify malfunctioning part. Refer to 

SCS-22, "Work Procedure"

.

Does the pressure increase?

YES

>> Replace the PPMU. Refer to 

SCS-39, "PPMU, MIDDLE TUBE ASSEMBLY, PPMU PIPE :

Removal and Installation"

.

NO

>> GO TO 6.

6.

CHECK SHOCK ABSORBER

Identify malfunctioning shock absorber. Refer to 

SCS-24, "Work Procedure"

.

>> Replace identified shock absorber. Refer to 

FSU-10, "Removal and Installation"

 (front), 

RSU-8,

"Removal and Installation"

 (rear).

Tightening torque

: 8.3 N·m (0.85 kg-m, 73 in-lb)

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HYDRAULIC BODY-MOTION CONTROL SYSTEM

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< REMOVAL AND INSTALLATION >

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REMOVAL AND INSTALLATION

HYDRAULIC BODY-MOTION CONTROL SYSTEM

Hydraulic Piping

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FRONT TUBE ASSEMBLY

1.

Middle tube assembly RH

2.

Accumulator assembly RH

3.

Front tube assembly A

4.

Front tube assembly B

5.

Accumulator assembly LH

6.

PPMU pipe A

7.

PPMU assembly

8.

Middle tube assembly LH

9.

PPMU pipe B

10.

Rear tube assembly A

11.

Rear tube assembly B

:

Vehicle front

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SCS-32

< REMOVAL AND INSTALLATION >

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HYDRAULIC BODY-MOTION CONTROL SYSTEM

FRONT TUBE ASSEMBLY : Exploded View

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FRONT TUBE ASSEMBLY : Removal and Installation

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REMOVAL

Front Tube Assembly A (from Front Shock Absorber RH Upper to Front Shock Absorber LH Lower)

1.

Reduce system pressure. Refer to 

SCS-17, "Work Procedure"

.

1.

Protector B

2.

Bushing

3.

Collar

4.

Bleeder valve

5.

Cap

6.

O-ring

7.

Front tube assembly A

8.

Front tube assembly B

9.

Protector A

A.

To front shock absorber LH

B.

To front shock absorber RH

: Vehicle front

:

Apply genuine NISSAN hydraulic 
suspension fluid

Refer to 

GI-4, "Components"

 for symbols not described on the above.

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