lock INFINITI QX56 2011 Factory Service Manual

DLN-56
< DTC/CIRCUIT DIAGNOSIS >[TRANSFER: ATX90A]
P180C SENSOR POWER SUPPLY (5V)
4. Check the continuity between transfer rotary position sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace error-detected parts.
6.CHECK TRANSFER ROTARY POSITION SENSOR POWER SUPPLY (2)
1. Turn the ignition switch OFF.
2. Connect transfer lock position sensor harness connector.
3. Turn the ignition switch ON. CAUTION:
Never start the engine.
4. Check the voltage between transfer rotary position sensor harness connector terminals.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace transfer rotary position sensor. Refer to DLN-117, "
Removal and Installation".
7.CHECK TERMINALS AND HARNESS CONNECTORS
Check the pin terminals for damage or loose connection with each harness connector.
Is the inspection result normal?
YES >> Replace transfer control unit. Refer to DLN-107, "Removal and Installation".
NO >> Repair or replace error-detected parts.
Transfer control unit Transfer rotary position sensor Continuity
Connector Terminal Connector Terminal
E59 18
F41 1
Existed
16 2
Transfer rotary position sensor —Continuity
Connector Terminal
F41 1 Ground Not existed
+ −
Voltag e
Transfer rotary position sensor
Connector Terminal F41 1 2 Approx. 5 V
Revision: 2010 May2011 QX56

P1817 TRANSFER MOTORDLN-71
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
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2. Turn the actuator shaft. Refer to DLN-114, "Inspection".
3. Check “ROTARY POSI SEN” of CONSULT-II I “DATA MONITOR” for “ALL MODE AWD/4WD”.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Transfer assembly is mechanical malfunction. Replace transfer assembly. Refer to DLN-121,
"Removal and Installation".
4.CHECK TERMINALS AND HARNESS CONNECTORS
Check the pin terminals for damage or loose connection with each harness connector.
Is the inspection result normal?
YES >> Replace transfer control unit. Refer to DLN-107, "Removal and Installation".
NO >> Repair or replace error-detected parts.
Component InspectionINFOID:0000000006222270
1.CHECK TRANSFER MOTOR
1. Remove transfer control actuator. Refer to DLN-114, "
Exploded View".
2. Apply 12 V to transfer control actuator connector No. 1 terminal and No. 8 terminal.
CAUTION:
 Never make the terminals short.
 Connect the fuse between the term inals when applying the voltage.
3. Check the operation of transfer control actuator.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace transfer control actuator. Refer to DLN-114, "
Exploded View".
Monitor item Condition Status
ROTARY POSI SEN Turn the actuator shaft. Value is changing
Transfer control actuator Condition Operation
Te r m i n a l
18 Apply the voltage between No. 1 (+)
terminal and No. 8 (
−) terminal. Operate clockwise
Apply the voltage between No. 1 ( −)
terminal and No. 8 (+) terminal. Operate counter-
clockwise
Revision: 2010 May2011 QX56

P182B TRANSFER LOCK POSITION SENSOR
DLN-85
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
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P182B TRANSFER LOCK POSITION SENSOR
DTC LogicINFOID:0000000006222292
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Turn the ignition switch OFF to ON.
2. Turn the 4WD shift switch AUTO ⇒4H ⇒4LO ⇒4H ⇒AUTO.
3. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC
“P182B” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-85, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222293
1.CHECK TRANSFER LOCK POSITION SENSOR
With CONSULT-III
1. Start the engine.
2. Turn the 4WD shift switch AUTO ⇒4H ⇒4LO ⇒4H ⇒AUTO.
3. Check “LOCK POSI SEN” of CONSULT-III “DATA MONITOR” for “ALL MODE AWD/4WD”.
What is the item on "DATA MONITOR"?
OPEN >> GO TO 7.
LOCK >> GO TO 7.
UNLEAN>>GO TO 6.
HI TEMP>>GO TO 5.
ERROR>> GO TO 5.
BAT >> GO TO 2.
GND >> GO TO 2.
2.CHECK TRANSFER LOCK POSITION POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect transfer positi on sensor harness connector.
3. Turn the ignition switch ON. CAUTION:
DTC Display item Malfunction detected condition Possible cause
P182B Lock POSITION SEN Malfunction related to transfer lock posi-
tion sensor has been detected. Transfer lock position sensor
- Transfer lock position sensor error
- Malfunction of transfer lock position
sensor circuit
Monitor item Condition Status
LOCK POSI SEN 4WD shift switch: AUTO or 4H OPEN
4WD shift switch: 4L LOCK
When transfer lock position sensor is unlearned. UNLEAN
When the temperature of transfer lock position sensor is
high.
HI TEMP
When transfer lock position sensor is malfunctioning. ERROR
When transfer lock position sensor signal circuit is short.
(Battery short) BAT
When transfer lock position sensor signal circuit is short.
(Ground short) GND
Revision: 2010 May2011 QX56

DLN-86
< DTC/CIRCUIT DIAGNOSIS >[TRANSFER: ATX90A]
P182B TRANSFER LOCK POSITION SENSOR
Never start the engine.
4. Check the voltage between transfer position sensor harness connector terminals.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK TRANSFER LOCK POSITION SENSOR POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect transfer control unit harness connector.
3. Check the continuity between transfer control uni t harness connector and transfer lock position sensor
harness connector.
4. Check the continuity between transfer lock position harness connector and ground.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace error-detected parts.
4.CHECK TRANSFER LOCK POSITI ON SENSOR SIGNAL CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect transfer control unit harness connector.
3. Check the continuity between transfer control uni t harness connector and transfer lock position sensor
harness connector.
4. Check the continuity between transfer lock position harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace error-detected parts.
5.REPLACE TRANSFER LOCK POSITION SENSOR
1. Replace transfer lock position sensor. Refer to DLN-119, "
Removal and Installation".
2. Perform confirmation procedure again. Refer to DLN-85, "
DTC Logic".
Is the inspection result normal?
+ −
Voltag e
Transfer lock position sensor
Connector Terminal F40 1 2 Approx. 5 V
Transfer control unit Transfer lock position sensor Continuity
Connector Terminal Connector Terminal
E59 17
F40 1
Existed
30 2
Transfer lock position sensor -Continuity
Connector Terminal
F40 1 Ground Not existed
Transfer control unit Transfer lock position sensor Continuity
Connector Terminal Connector Terminal
E59 38 F40 3 Existed
Transfer lock position sensor -Continuity
Connector Terminal
F40 3 Ground Not existed
Revision: 2010 May2011 QX56

P182B TRANSFER LOCK POSITION SENSOR
DLN-87
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
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YES >> INSPECTION END
NO >> GO TO 7.
6.PERFORM LEARNING OF TRANSF ER LOCK POSITION SENSOR
Transfer lock position sensor. Refer to DLN-44, "
Work Procedure".
>> GO TO 7.
7.CHECK TERMINALS AND HARNESS CONNECTORS
Check the pin terminals for damage or loose connection with each harness connector.
Is the inspection result normal?
YES >> Replace transfer control unit. Refer to DLN-107, "Removal and Installation".
NO >> Repair or replace error-detected parts.
Revision: 2010 May2011 QX56

POWER SUPPLY AND GROUND CIRCUITDLN-95
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
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2. Disconnect 4WD switch assembly harness connector.
3. Check the voltage between 4WD switch assembly harness connector and ground.
4. Turn the ignition switch ON. CAUTION:
Never start the engine.
5. Check the voltage between 4WD switch assembly harness connector and ground.
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 8.
8.CHECK 4WD SWITCH ASSEMBLY POWER SUPPLY (2)
1. Turn the ignition switch OFF.
2. Check the 10A fuse (#13).
3. Disconnect fuse block (J/B) harness connector.
4. Check the continuity between transfer control unit harness connector and IPDM E/R harness connector.
5. Check the continuity between transfer control unit harness connector and the ground.
Is the inspection result normal?
YES >> Perform the trouble diagnosis for ignition power supply circuit. Refer to PG-89, "Wiring Diagram -
IGNITION POWER SUPPLY -".
NO >> Repair or replace error-detected parts.
9.CHECK TRANSFER CONTROL UNIT GROUND
1. Turn the ignition switch OFF.
2. Check the voltage between transfer control unit harness connector and ground.
3. Check the continuity between transfer control unit harness connector and ground.
4WD switch assembly — Voltage
Connector Terminal
M54 12 Ground Approx. 0 V
4WD switch assembly — Voltage
Connector Terminal
M54 12 Ground Battery voltage
Fuse block (J/B) 4WD switch assembly Continuity
Connector Terminal Connector Terminal
M3 10C M54 12 Existed
4WD switch assembly —Continuity
Connector Terminal
M54 12 Ground Not existed
Transfer control unit — Voltage
Connector Terminal
E60 44
Ground Approx. 0 V
46
Transfer control unit —Continuity
Connector Terminal
E60 44
Ground Existed
46
Revision: 2010 May2011 QX56

TRANSFER CONTROL ACTUATORDLN-115
< REMOVAL AND INSTALLATION > [TRANSFER: ATX90A]
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a. Install the spline socket (A) [SST: KV10119400 ( — )] to transfer assembly in the figure.
b. When turn the shaft in (B) direction, check returning to (C) direc- tion by spring power.
CAUTION:
The maximum turning force shall be 30 N·m (3.1 kg-m, 22 ft-
lb).
c. When turn the shaft in (C) direction, check locking the shaft.
INSPECTION AFTER INSTALLATION
After driving, check the surface fitting transfer cont rol actuator to transfer assembly for fluid leakage.
JPDIE0184ZZ
Revision: 2010 May2011 QX56

TRANSFER LOCK POSITION SENSORDLN-119
< REMOVAL AND INSTALLATION > [TRANSFER: ATX90A]
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TRANSFER LOCK PO SITION SENSOR
Exploded ViewINFOID:0000000006222343
Removal and InstallationINFOID:0000000006222344
REMOVAL
1. Turn the ignition switch OFF.
2. Disconnect negative battery terminal.
CAUTION:
Wait for 5 seconds after turning ignition OFF.
3. Support transfer assembly and transmission assembly with a jack.
4. Remove rear engine mounting cross member with a power tool. Refer to TM-208, "
4WD : Removal and
Installation".
5. Lower jack to the position where the tr ansfer lock position sensor can be removed.
6. Disconnect the transfer lock position sensor connector.
7. Remove the transfer lock position sensor.
8. Perform inspection after removal. Refer to DLN-119, "
Inspection".
INSTALLATION
Note the following, and install in the reverse order of removal.
 Never damage O-ring of transfer lock position sensor.
 Perform inspection after installation. Refer to DLN-119, "
Inspection".
 When replacing the transfer lock position sensor, perform learning of transfer lock position sensor. Refer to
DLN-44, "
Work Procedure".
InspectionINFOID:0000000006222345
INSPECTION AFTER REMOVAL
Check the O-ring assembled transfer lock position sensor for wear, crack and damage. Replace the transfer
lock position sensor if there is malfunction.
INSPECTION AFTER INSTALLATION
After driving, check the surface fitting transfer lock position sensor to transfer assembly for fluid leakage.
1. Transfer lock position sensor 2. Transfer assembly
: Vehicle front
Refer to GI-4, "
Components" for symbols not described above.
JPDIE0284GB
Revision: 2010 May2011 QX56

TRANSFER ASSEMBLYDLN-121
< UNIT REMOVAL AND INSTALLATION > [TRANSFER: ATX90A]
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UNIT REMOVAL AND INSTALLATION
TRANSFER ASSEMBLY
Exploded ViewINFOID:0000000006222349
Removal and InstallationINFOID:0000000006222350
REMOVAL
1. Remove rear propeller shaft. Refer to DLN-144, "Removal and Installation".
2. Remove front propeller shaft. Refer to DLN-129, "
Removal and Installation".
3. Disconnect transfer control actuator, transfer rotary position sensor, transfer lock position sensor, transfer
Hi-Lo position sensor and transfer fluid temperatur e sensor harness connectors and separate harnesses
from transfer assembly.
4. Remove transfer breather hose.
5. Remove exhaust front tube (LH) with a power tool. Refer to EX-5, "
Removal and Installation".
6. Remove exhaust front tube (RH) with a power tool. Refer to EX-5, "
Removal and Installation".
7. Remove main muffler with a power tool. Refer to EX-5, "
Removal and Installation".
8. Support transfer assembly and transmission assembly with a jack. CAUTION:
Secure transfer assembly and tr ansmission assembly to a jack.
9. Remove rear engine mounting member and engine mounting insulator with a power tool. Refer to EM-99,
"Removal and Installation".
10. Lower jack to the position where the top transfer mounting bolts can be removed.
11. Remove transfer mounting bolts and separate transfer from transmission. CAUTION:
Secure transfer assembly and tr ansmission assembly to a jack.
INSTALLATION
Note the following, and install in the reverse order of removal.
1. Bracket 2. Bracket 3. Transfer assembly
: Vehicle front
JPDIE0286GB
Revision: 2010 May2011 QX56

DLN-148
< PRECAUTION >[FRONT FINAL DRIVE: R180A]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution Necessary for Steering W
heel Rotation after Battery Disconnect
INFOID:0000000006222372
NOTE:
 Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect bot h battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnos is according to self-diagnosis results.
For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the bat tery disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position. (At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock wi ll remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
5. When the repair work is completed, re-connect bot h battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button igniti on switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.
Precaution for Servicing Front Final DriveINFOID:0000000006222373
 Before starting diagnosis of the vehicle, understand the symptoms well. Perform correct and systematic
operations.
 Check for the correct installation status prior to re moval or disassembly. When matching marks are required,
be certain they do not interfere with the f unction of the parts they are applied to.
 Overhaul should be done in a clean work area, a dust proof area is recommended.
 Before disassembly, completely remove sand and mud from the exterior of the unit, preventing them from
entering into the unit during disassembly or assembly.
 Always use shop paper for cleaning the inside of components.
 Avoid using cotton gloves or a shop cloth to prevent the entering of lint.
 Check appearance of the disassembled parts for dam age, deformation, and abnormal wear. Replace them
with new ones if necessary.
 Gaskets, seals and O-rings should be replaced any time the unit is disassembled.
 Clean and flush the parts sufficiently and blow them dry.
 Be careful not to damage sliding surfaces and mating surfaces.
 When applying sealant, remove the old sealant from the mating surface; then remove any moisture, oil, and
foreign materials from the application and mating surfaces.
 In principle, tighten nuts or bolts gradually in severa l steps working diagonally from inside to outside. If a
tightening sequence is specified, observe it.
 During assembly, observe the specified tightening torque.
 Add new differential gear oil, petroleum jelly, or multi-purpose grease, as specified.
Revision: 2010 May2011 QX56