4WD INFINITI QX4 2005 Factory User Guide

AT-278
DISASSEMBLY
Revision: October 20052005 QX56
67. Remove return spring from servo assembly.
68. Remove O-rings from servo assembly.
69. Remove parking actuator support from rear extension (2WD
models) or adapter case (4WD models).
70. Remove parking pawl (with return spring) and pawl shaft from
rear extension (2WD models) or adapter case (4WD models).
71. Remove return spring from parking pawl.
SCIA5717E
SCIA5719E
SCIA3423E
SCIA3424E
SCIA2445E

DISASSEMBLY
AT-279
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Revision: October 20052005 QX56
72. Remove needle bearing from rear extension (2WD models) or
adapter case (4WD models).
73. Remove rear oil seal from rear extension (2WD models) or
adapter case (4WD models).
CAUTION:
Be careful not to scratch rear extension (2WD models) or
adapter case (4WD models).
SCIA5221E
SCIA5272E

ASSEMBLY
AT-303
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22. Measure clearance between retaining plate and snap ring. If not
within specified clearance, select proper retaining plate.
23. Install needle bearing to transmission case.
CAUTION:

Take care with the direction of needle bearing. Refer to
AT-260, "
Locations of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings" .

Apply petroleum jelly to needle bearing.
24. Install revolution sensor to transmission case. Tighten revolution
sensor bolt to the specified torque. Refer to AT-250, "
Compo-
nents" .
CAUTION:

Do not subject it to impact by dropping or hitting it.

Be careful not to damage harness with the edge of case.

Do not allow metal filings, etc., to get on the sensor's
front edge magnetic area.

Do not place in an area affected by magnetism.
25. Install new rear oil seal into the rear extension (2WD models) or
adapter case (4WD models) until it is flush with component face,
using Tool or suitable drift.
CAUTION:

Apply ATF to rear oil seal.

Do not reuse rear oil seal.Specified clearance “A”:
Standard: 0.7 - 1.1mm (0.028 - 0.043 in)
Retaining plate:
Refer to AT-323, "
Reverse brake" .
SCIA5341E
SCIA5213E
SCIA2320E
SCIA5581E

AT-304
ASSEMBLY
Revision: October 20052005 QX56
26. Install return spring to parking pawl.
27. Install parking pawl (with return spring) and pawl shaft to rear
extension (2WD models) or adapter case (4WD models).
28. Install parking actuator support to rear extension (2WD models)
or adapter case (4WD models).
29. Install needle bearing to rear extension (2WD models) or
adapter case (4WD models).
CAUTION:
Apply petroleum jelly to needle bearing.
30. Install new seal rings to output shaft.
CAUTION:

Do not reuse seal rings.

Apply petroleum jelly to seal rings.
SCIA2445E
SCIA3424E
SCIA3423E
SCIA5221E
SCIA5209E

ASSEMBLY
AT-305
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Revision: October 20052005 QX56
31. Install parking gear to output shaft.
32. Install output shaft in transmission case.
CAUTION:
Be careful not to mistake front for rear because both sides
looks similar. (Thinner end is front side.)
33. Install bearing race in output shaft.
34. Install rear extension assembly (2WD models) or adapter case assembly (4WD models) according to the
following procedures.
a.2WD models
i. Apply recommended sealant (Genuine Anaerobic Liquid Gasket
or equivalent. Refer to GI-45, "
Recommended Chemical Prod-
ucts and Sealants" .) to rear extension assembly as shown.
CAUTION:
Complete remove all moisture, oil and old sealant, etc.
From the transmission case and rear extension assembly
mounting surfaces.
SCIA5247E
SCIA5030E
SCIA5245E
SCIA5212E

AT-306
ASSEMBLY
Revision: October 20052005 QX56
ii. Install rear extension assembly to transmission case.
iii. Install bracket.
iv. Tighten rear extension assembly bolts to specified torque.
CAUTION:
Do not reuse self-sealing bolt.
b.4WD models
i. Install new gasket to transmission case.
CAUTION:

Do not reuse gasket.

Complete remove all moisture, oil and old gasket, etc.
From the transmission case and adapter case assembly
mounting surfaces.
ii. Install adapter case assembly to transmission case.
SCIA5029E
Rear extension assembly
bolt: 52 N·m (5.3 kg-m, 38 ft-lb)
Self-sealing bolt : 61 N·m (6.2 kg-m, 45 ft-lb)
SCIA5349E
SCIA5231E
SCIA5205E

BRAKE BOOSTER
BR-17
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Revision: October 20052005 QX56
Removal and InstallationEFS004WD
REMOVAL
CAUTION:

Be careful not to deform or bend brake piping while removing and installing brake booster.

Replace clevis pin if it is damaged.

Be careful not to damage brake booster stud bolt threads. If brake booster is tilted or inclined dur-
ing installation, dash panel may damage the threads.

Attach the check valve in the correct direction.
1. Remove engine room cover with power tool. Refer to EM-11, "
Removal and Installation" .
2. Remove engine air duct assembly. Refer to EM-14, "
Removal and Installation" .
3. Remove brake piping from brake master cylinder.
4. Remove brake master cylinder. Refer to BR-14, "
Removal and Installation" .
5. Remove vacuum hose from brake booster. Refer to BR-19, "
VACUUM LINES" .
6. Disconnect active boost and delta stroke sensor harness connectors from brake booster assembly.
7. Remove brake pedal attachment snap pin and clevis pin from inside the vehicle.
8. Remove nuts on brake booster and brake pedal assembly.
9. Remove brake booster assembly from dash panel.
INSTALLATION
1. Loosen lock nut to adjust input rod length so that the length B (in
the figure) satisfies the specified value.
2. After adjusting “B”, temporarily tighten lock nut and install
booster assembly to the vehicle.

Install a gaskets and spacer block between booster assembly
and the dash panel.
3. Connect brake pedal with clevis of input rod.
4. Install pedal bracket mounting nuts and tighten them to the
specified torque.
5. Install brake piping from brake master cylinder to ABS actuator. Refer to BR-11, "
Hydraulic Circuit" .
1. Reservoir tank 2. Brake master cylinder 3. Gasket
4. Brake pedal 5. Lock nut 6. Spacer block
7. Brake booster 8. Active booster 9. Delta stroke sensor
WFIA0381E
Length “B” : 151 mm (5.94 in)
WFIA0382E

TROUBLE DIAGNOSIS
BRC-35
[VDC/TCS/ABS]
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Revision: October 20052005 QX56
×: Applicable
–: Not applicableVDC SIGNAL
(ON/OFF)––×VDC operation (ON/OFF) status is
displayed.
EBD WARN LAMP – –×Brake warning lamp (ON/OFF) sta-
tus is displayed.
SLCT LVR POSI×××Shift position judged by PNP switch
signal.
R POSI SIG – –×Shift position judged by PNP switch
signal.
4WD FAIL REQ – –×The state of 4WD controller is dis-
played by CAN communication sig-
nal.
2WD/4WD – –×It recognizes on software whether it
is 2WD and whether it is in 4WD
state.
BST OPER SIG – –×Active booster operation (ON/OFF)
status is displayed.
PRESS SENSOR×–×Brake pressure detected by pres-
sure sensor is displayed.
CRANKING SIG – –×The input state of the key SW
START position signal is displayed.
PRESS SEN 2 – –×Brake pressure detected by pres-
sure sensor is displayed.
DELTA S SEN – –×The amount of stroke sensor move-
ments in the active booster
detected by DELTA S SEN is dis-
played.
RELEASE SW NO – –×Release switch signal (ON/OFF)
status is displayed. "ON" indicates
that the brake pedal is depressed.
"OFF" is that the brake pedal is
released.
RELEASE SW NC – –×Release switch signal (ON/OFF)
status is displayed. "OFF" indi-
cates that the brake pedal is
depressed on. "ON" is that the
brake pedal is released.
OHB FAIL – –×OHB fail status is displayed.
HBA FAIL – –×HBA fail status is displayed.
OHB SIG – –×OHB operation (ON/OFF) status is
displayed.
HBA SIG – –×HBA operation (ON/OFF) status is
displayed.
PRES CTRL ACC – –×Pressure control state (ON/OFF) is
displayed. It is applied only to an
ICC vehicle.
PRES FAIL ACC – –×Pressure control fail state (ON/
OFF) is displayed. It is applied only
to an ICC vehicle.
STP OFF RLY – –×Stop lamp relay signal (ON/OFF)
status is displayed. Item
(Unit)Data monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELECTION
FROM MENU

DI-36
WARNING LAMPS
Revision: October 20052005 QX56
4WD Models
WKWA1172E

FRONT BUMPER
EI-13
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Revision: October 20052005 QX56
FRONT BUMPERPFP:F2022
Removal and InstallationEIS004WD
1. Remove side screws from fascia assembly.
2. Remove screws from front of fender protector. Refer to EI-23, "
FENDER PROTECTOR" .
3. Remove engine undercover.
1. Lower energy absorber 2. Front bumper side bracket RH 3. Front bumper stay RH
4. Upper bumper reinforcement 5. Plastic clip 6. Upper energy absorber (part of
upper bumper reinforcement)
7. Fastener 8. Front fascia assembly 9. Front fascia bracket
10. Front undercover 11. Fog turn/fog lamp 12. Fog turn/fog lamp LH/RH finisher
13. Spring nut 14. Front bumper stay LH 15. Front bumper side bracket LH
16. Plastic clip 16. Headlamp finisher (RH shown)
WIIA0260E