height INFINITI QX56 2011 Factory Service Manual

SCS-92
< SYMPTOM DIAGNOSIS >[AIR LEVELIZER CONTROL SYSTEM]
VEHICLE HEIGHT CANNOT BE LOWERED
VEHICLE HEIGHT CANNOT BE LOWERED
DescriptionINFOID:0000000006256094
Vehicle height remains in high status.
Diagnosis ProcedureINFOID: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".
Revision: 2010 May2011 QX56

CK SUSP INDICATOR LAMP DOES NOT TURN OFF
SCS-93
< SYMPTOM DIAGNOSIS > [AIR LEVELIZER CONTROL SYSTEM]
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CK SUSP INDICATOR LAMP DOES NOT TURN OFF
DescriptionINFOID:0000000006256096
 CK SUSP indicator lamp turns ON while driving the vehicle.
 CK SUSP indicator lamp does not turn ON after the completion of standard vehicle height setting.
Diagnosis ProcedureINFOID:0000000006256097
1.STANDARD VEHICLE HEIGHT SETTING
Perform “STANDARD VEHICLE HEIGHT SETTING”. Refer to SCS-67, "
Work Procedure".
Does CK SUSP indicator lamp turn OFF?
YES >> INSPECTION END
NO >> Replace the air levelizer control module. Refer to SCS-94, "
Removal and Installation".
Revision: 2010 May2011 QX56

SCS-94
< REMOVAL AND INSTALLATION >[AIR LEVELIZER CONTROL SYSTEM]
AIR LEVELIZER CONTROL MODULE
REMOVAL AND INSTALLATION
AIR LEVELIZER CONTROL MODULE
Exploded ViewINFOID:0000000006256098
Removal and InstallationINFOID:0000000006256099
REMOVAL
CAUTION:
Never impact on air levelizer contro
l module when removing or installing air levelizer control module.
1. Disconnect battery cable from negative terminal.
2. Remove luggage side lower finisher (LH). Refer to INT-33, "
Exploded View".
3. Disconnect air levelizer control module harness connector.
4. Remove the air levelizer control module.
INSTALLATION
Install in the reverse order of removal.
AdjustmentINFOID:0000000006256100
After air levelizer control module is replaced, perform “STANDARD VEHICLE HEIGHT SETTING”. Refer to
SCS-67, "
Work Procedure".
1. Air levelizer control module
:Vehicle front
Refer to GI-4, "
Components" for symbols not described on the above.
JSEIA0237GB
Revision: 2010 May2011 QX56

SCS-98
< REMOVAL AND INSTALLATION >[AIR LEVELIZER CONTROL SYSTEM]
VEHICLE HEIGHT SENSOR
VEHICLE HEIGHT SENSOR
Exploded ViewINFOID:0000000006256104
Removal and InstallationINFOID:0000000006256105
REMOVAL
CAUTION:
Never disassemble the vehicle height sensor.
1. Lift up the vehicle.
2. Disconnect the vehicle height sensor harness connector.
3. Remove the vehicle height sensor.
INSTALLATION
Note the following, and install in the reverse order of the removal.
Completely engage hooks on frame when installing vehicle height
sensor.
1. Vehicle height sensor
:Vehicle front
Refer to GI-4, "
Components" for symbols not described on the above.
JSEIA0226GB
JSEIA0243ZZ
Revision: 2010 May2011 QX56

VEHICLE HEIGHT SENSORSCS-99
< REMOVAL AND INSTALLATION > [AIR LEVELIZER CONTROL SYSTEM]
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AdjustmentINFOID:0000000006256106
After vehicle height sensor is replaced, removal or installation, perform “STANDARD VEHICLE HEIGHT SET-
TING”. Refer to SCS-67, "
Work Procedure".
Revision: 2010 May2011 QX56

ST-44
< REMOVAL AND INSTALLATION >
STEERING GEAR AND LINKAGE
3. Measure adjusting screw height (H), and loosen adjusting screwlock nut (1) and adjusting screw (2).
CAUTION:
 Never loosen adjusting screw 2 turns or more.
 Replace steering gear assembly if adjusting screw is
loosened 2 turns or more and it is removed.
4. Remove gear-sub assembly from gear housing assembly.
5. Remove O-ring from gear housing assembly.
6. Loosen outer socket lock nut, and remove outer socket.
7. Remove boot clamps, and then remove boot from inner socket. CAUTION:
Never damage inner socket and gear housing assembly when removing boot. Inner socket and
gear housing assembly must be replaced if inne r socket and gear housing assembly are damaged
because it may cause foreign material interfusion.
8. Remove inner socket from gear housing assembly.
ASSEMBLY
1. Apply recommended fluid to O-ring, and then install O-ring to gear housing assembly. CAUTION:
Never reuse O-ring.
2. Install gear-sub assembly to gear housing assembly. CAUTION:
In order to protect oil seal from any da mage, insert gear-sub assembly straightly.
3. Install inner socket to gear housing assembly with the following procedure.
a. Apply thread locking sealant into the thread of inner socket. Use Genuine High Strength Thread Locking Sealant or equivalent. Refer to GI-22, "
Recommended
Chemical Products and Sealants".
4. Screw inner socket into rack part and tighten at the specified torque.
5. Decide on the neutral position of the rack stroke (L).
6. Install rear cover cap to gear sub-assembly. CAUTION:
Make sure that the projection of rear cover cap is aligned
with the marking position of gear housing assembly.
7. Install adjusting screw with the following procedure.
a. Apply recommended sealant into the thread of adjusting screw (2) (2 turns thread), and then screw in the adjusting screw until it
reaches height (H) from gear housing assembly (3) measured
before disassembling.
Use Genuine Liquid Gasket Gasket, Three Bond 1111B or
equivalent.
b. Tighten the adjusting screw lock nut (1) to the specified torque.
8. Move rack assembly 10 strokes throughout the full stroke so that the parts can fit with each other.
9. Adjust pinion rotating torque with the following procedure.
3 : Gear housing assembly
JPGIA0065ZZ
L : Refer to ST-58, "Rack Stroke".
SGIA0877E
JPGIA0065ZZ
Revision: 2010 May2011 QX56

TM-184
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
CONTROL VALVE & TCM
9. Remove bolts and clip (1) from the control valve & TCM.
*: Reamer bolt
10. Remove the control valve & TCM from transmission case.
CAUTION:
When removing, be careful wi th the manual valve (1) notch
and manual plate (2) height. Remove it vertically.
11. Remove joint connector (1) from the control valve & TCM using a flat-bladed screwdriver (A).
12. Disconnect TCM connector (A). CAUTION:
Be careful not to damage connector.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
 Be careful not to damage connector when installing any connector.
 Never reuse joint connector.
 Apply ATF to O-ring of joint connector.
 Never reuse drain plug and drain plug gasket. In addition, install new drain plug and drain plug gas-
ket after adjustment of A/T fluid filling.
 Refer to the following when installing the control valve & TCM to transmission case.
: Vehicle front
Bolt symbol Length mm (in) Number of bolts A 43 (1.69) 3
B 40 (1.57) 2
C 54 (2.13) 6
D 50 (1.97) 2
E* 50 (1.97) 1
JPDIA1105ZZ
JPDIA0012ZZ
JSDIA1718ZZ
JSDIA1813ZZ
Revision: 2010 May2011 QX56

TM-190
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
PARKING COMPONENTS
16. Remove return spring (1) from parking pawl (2).
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
 Never reuse seal rings and drain plug gasket.
 Apply petroleum jelly to n
eedle bearing and seal rings.
 Insert the tip of parking rod between the parki ng pawl and the parking actuator support when assem-
bling the rear extension assembly.
 Refer to the followings installing rear extension assembly.
- Apply recommended sealant (Genuine Anaerobic Liquid Gasket or
equivalent. Refer to GI-22, "
Recommended Chemical Products
and Sealants".) to rear extension assembly as shown in the figure.
CAUTION:
Completely remove all moisture, oil and old sealant, etc. from
the transmission case and rear extension assembly mounting
surfaces.
- Tighten rear extension assembly bolts to the specified torque.
2WD : InspectionINFOID:0000000006233260
INSPECTION AFTER REMOVAL
SCIA6180J
Sealant starting
point and end-
point (A) : Start and finish
point shall be in
the center of two bolts.
Overlap width of
sealant starting
point and end-
point (B) : 3 – 5 mm (0.12 – 0.20 in)
Sealant width (C) : 1.0 – 2.0 mm (0.04 – 0.08 in)
Sealant height (C) : 0.4 – 1.0 mm (0.016 – 0.04 in)
JSDIA1855ZZ
1: Bracket
A: Bolt
B : Self-sealing bolt
JSDIA1845ZZ
Revision: 2010 May2011 QX56

OUTPUT SPEED SENSORTM-197
< REMOVAL AND INSTALLATION > [7AT: RE7R01B]
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12. Disconnect output speed sensor connector (A). CAUTION:
Be careful not to damage connector
13. Disengage terminal clips ( ).
14. Remove output speed sensor (1) from transmission case.
CAUTION:
 Never subject it to impact by dropping or hitting it.
 Never disassemble.
 Never allow metal filings, etc. to get on the sensor's frontedge magnetic area.
 Never place in an area affected by magnetism.
INSTALLATION
Note the following, and install in the reverse order removal.
CAUTION:
 Insert the tip of parking rod between the parkin g pole and the parking actuator support when assem-
bling the rear ext ension assembly.
 Never reuse drain plug gasket.
 Refer to the followings when installing output speed sensor.
CAUTION:
 Never subject it to impact by dropping or hitting it.
 Never disassemble.
 Never allow metal filings, etc. to get on the sensor's front edge magnetic area.
 Never place in an area affected by magnetism.
 Refer to the followings when installing rear extension assembly.
- Apply recommended sealant (Genuine Anaerobic Liquid Gasket or equivalent. Refer to GI-22, "
Recommended Chemical Products
and Sealants".) to rear extension assembly as shown in the figure.
CAUTION:
Completely remove all moisture, oil and old sealant, etc. from
transmission case and rear extension assembly mounting
surfaces.
JPDIA1104ZZ
: Bolt
JSDIA1885ZZ
Sealant starting
point and end-
point (A) : Start and finish point shall be in
the center of two bolts.
Overlap width of
sealant starting
point and end-
point (B) : 3 – 5 mm (0.12 – 0.20 in)
Sealant width (C) : 1.0 – 2.0 mm (0.04 – 0.08 in)
Sealant height (C) : 0.4 – 1.0 mm (0.016 – 0.04 in)
JSDIA1855ZZ
Revision: 2010 May2011 QX56

TM-234
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
38. Remove control valve & TCM mounting bolts and clip (1) from
the control valve & TCM.
*: Reamer bolt
39. Remove the control valve & TCM (1) from transmission case.CAUTION:
When removing, never with the manual valve notch and
manual plate height. Remove it vertically.
40. Remove joint connector (1) from the control valve & TCM using a flat-bladed screwdriver (A).
41. Disconnect TCM connector (A). CAUTION:
Be careful not to damage connector.
42. Remove rear extension assembly (2WD) or adapter ca se assembly (4WD) according to the following pro-
cedures.
a. 2WD
: Front
Bolt symbol Length mm (in) Number of bolts A 43 (1.69) 3
B 40 (1.57) 2
C 54 (2.13) 6
D 50 (1.97) 2
E* 50 (1.97) 1
JPDIA1105ZZ
JSDIA1823ZZ
JSDIA1718ZZ
JSDIA1813ZZ
Revision: 2010 May2011 QX56