2011 INFINITI QX56 engine

DLN-44
< BASIC INSPECTION >[TRANSFER: ATX90A]
TRANSFER LOCK POSITION SENSOR LEARNING
TRANSFER LOCK POSI
TION SENSOR LEARNING
DescriptionINFOID:0000000006222238
 Detect a stroke of transfer lock sleeve and learn operating area of transfer lock sleeve (Lock/Unlock)
 Perform the learning of transfer lock position sensor by “CONFIGURATION” of CONSULT-III function. Refer
to DLN-44, "
Work Procedure".
CAUTION:
Before performing the learning of lock position sensor, must erase l earning of transfer lock position
sensor.
*: “LOCK SLEEVE SENSOR” means transfer lock position sensor.
Work ProcedureINFOID:0000000006222239
NOTE:
In fail-safe mode, can not perform work support. (Except that DTC P181F or P182B is detected.)
1.PREPARATION BEFORE WORK
With CONSULT-III
1. Start the engine. CAUTION:
Never drive the vehicle.
2. Check “4WD MODE”, “T/M RANGE”, “COMER V HCL SPEED”, “MOTOR POWER SUP” of CONSULT-III
“DATA MONITOR” for “ALL MODE AWD/4WD”.
3. Continue the following condition.
>> GO TO 2.
2.PERFORM ERASE LOCK POSITION SENOR LEARNING
With CONSULT-III
1. Select “LOCK SLEEVE SENSOR INITIALIZE” of CONSULT-III “WORK SUPPORT” for “ALL MODE AWD/
4WD”.
2. Select “Start”.
3. Wait until the motor operation stop.
>> GO TO 3.
3.PERFORM LOCK POSITION SENOR LEARNING
With CONSULT-III
1. Select “LOCK SLEEVE SENSOR LEARNING” of CONSULT-III “WORK SUPPORT” for “ALL MODE
AWD/4WD”.
2. Select “Start”.
3. Wait until the motor operation stop.
>> GO TO 4.
4.PERFORM SELF-DIAGNOSIS
With CONSULT-III
Function Description
LOCK SLEEVE SENSOR
* INITIALIZE Format learning the transfer lock position sensor written to transfer control unit.
LOCK SLEEVE SENSOR
* LEARNING Perform learning the transfer lock position sensor.
4WD MODE : 4L
T/M RANGE : N
COMPER VHCL SPEED : 0 km/h
(Never drive the vehicle)
MOTOR POWER SUP : More than 11 V
Revision: 2010 May2011 QX56

TRANSFER LOCK POSITION SENSOR LEARNING
DLN-45
< BASIC INSPECTION > [TRANSFER: ATX90A]
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1. Erase self-diagnosis result for “ALL MODE AWD/4WD”.
2. Turn the ignition switch ON to OFF. CAUTION:
Wait for 10 seconds after turning ignition switch OFF.
3. Start the engine. CAUTION:
Never drive the vehicle.
4. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is
“DTC P182B” detected?
YES >> GO TO 1.
NO >> WORK END
Revision: 2010 May2011 QX56

DLN-46
< BASIC INSPECTION >[TRANSFER: ATX90A]
TRANSFER ROTARY POSITION SENSOR LEARNING
TRANSFER ROTARY POSI
TION SENSOR LEARNING
DescriptionINFOID:0000000006222240
Perform initial calibration after replacing transfer rotary position sensor. Refer to DLN-46, "Work Procedure".
Work ProcedureINFOID:0000000006222241
NOTE:
In fail-safe mode, can not perform work support. (Except that DTC P181F is detected.)
1.INITIAL CALIBRATION
With CONSULT-III
1. Start the engine.
CAUTION:
Never drive the vehicle.
2. Check “4WD MODE”, “T/M RANGE”, “COMER V HCL SPEED”, “MOTOR POWER SUP” of CONSULT-III
“DATA MONITOR” for “ALL MODE AWD/4WD”.
3. Continue the following condition.
4. Select “START CALIBRATION” of CONSULT- III “WORK SUPPORT” for “ALL MODE AWD/4WD”.
5. Wait till the motor operates. (Aprrox. 10 seconds)
>> GO TO 2.
2.PERFORM SELF-DIAGNOSIS
With CONSULT-III
1. Erase self-diagnosis result for “ALL MODE AWD/4WD”.
2. Turn the ignition switch ON to OFF.
CAUTION:
Wait for 10 seconds after turn ing ignition switch OFF.
3. Start the engine.
CAUTION:
Never drive the vehicle.
4. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is
“DTC P180D” detected?
YES >> GO TO 1.
NO >> WORK END
4WD MODE : AUTO
T/M RANGE : N
COMPER VHCL SPEED : 0 km/h (Never drive the vehicle)
MOTOR POWER SUP : More than 11 V
Revision: 2010 May2011 QX56

TRANSFER FLUID VISCOSITY LEARNINGDLN-47
< BASIC INSPECTION > [TRANSFER: ATX90A]
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TRANSFER FLUID VISCOSITY LEARNING
DescriptionINFOID:0000000006222242
Perform transfer fluid viscosity learning and initial calibration after draining and refilling transfer fluid. Refer to
DLN-47, "
Work Procedure".
Work ProcedureINFOID:0000000006222243
NOTE:
In fail-safe mode, can not perform work s upport. (Except that DTC P181F is detected.)
1.PREPARATION BEFORE WORK
With CONSULT-III
1. Start the engine.
CAUTION:
Never drive the vehicle.
2. Check “4WD MODE”, “T/M RANGE”, “COMER VHCL SPEED”, “MOTOR POWER SUP” of CONSULT-III
“DATA MONITOR” for “ALL MODE AWD/4WD”.
3. Continue the following condition more than 10 seconds.
>> GO TO 2.
2.TRANSFER FLUID VISCOSITY LEARNING
With CONSULT-III
1. Select “OIL DETERIORATION INFO RESET” of CONSULT-III “WORK SUPPORT” for “ALL MODE AWD/
4WD”.
2. Select “Start”.
>> GO TO 3.
3.INITIAL CALIBRATION
With CONSULT-III
1. Select “START CALIBRATION” of CONSULT- III “WORK SUPPORT” for “ALL MODE AWD/4WD”.
2. Wait until the motor operation stop. (After approximately 10 seconds)
>> GO TO 4.
4.PERFORM SELF-DIAGNOSIS
With CONSULT-III
1. Erase self-diagnosis result for “ALL MODE AWD/4WD”.
2. Turn the ignition switch ON to OFF.
CAUTION:
Wait for 10 seconds after turning ignition switch OFF.
3. Start the engine.
CAUTION:
Never drive the vehicle.
4. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is
“DTC P181F” detected?
YES >> GO TO 1.
NO >> WORK END
4WD MODE : AUTO
T/M RANGE : N
COMPER VHCL SPEED : 0 km/h (Never drive the vehicle)
MOTOR POWER SUP : More than 11 V
Revision: 2010 May2011 QX56

DLN-52
< DTC/CIRCUIT DIAGNOSIS >[TRANSFER: ATX90A]
P1807 OUT PUT SHAFT SPEED SENSOR
P1807 OUT PUT SHAFT SPEED SENSOR
DTC LogicINFOID:0000000006222246
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Start the engine and drive at 30 km/h (19 MPH) or more for approximately 1minute.
2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC
“P1807” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-52, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222247
1.PERFORM TCM SELF-DIAGNOSIS
With CONSULT-III
Perform self-diagnosis for “TRANSMISSION”.
Is any DTCs detected?
YES >> Check the DTC.
NO >> GO TO 2.
2.ERASE SELF-DIAGNOSTIC RESULT
With CONSULT-III
1. Erase self-diagnostic results for “ALL MODE AWD/4WD”.
2. Start the engine and drive vehicle at 30 km/h (19 MPH) or more.
3. Check that A/T CHECK indictor lamp turns OFF.
Does A/T CHECK indicator lamp turn OFF?
YES >> GO TO 3.
NO >> Refer to TM-165, "
Symptom Table".
3.CHECK TERMINALS AND HARNESS CONNECTORS
Check transfer control unit pin terminals for damage or loose connection with harness connector.
Is inspection result normal?
YES >> After turning the ignition switch OFF, perform DTC confirmation procedure again. When DTC
"P1807" is detected, Replace transfer control unit. Refer to DLN-107, "
Removal and Installation".
NO >> Repair or replace error-detected parts.
DTC Display item Malfunction detected condition Possible cause
P1807 VHCL SPEED SEN-AT  Malfunction is detected in output
speed signal that is output from TCM
through CAN communication.
 Improper signal is input while driving.  Harness or connector (CAN communi-
cation line)
TCM
- Internal malfunction of TCM
- Output speed signal error
Revision: 2010 May2011 QX56

P1808 WHEEL SPEED SENSORDLN-53
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
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P1808 WHEEL SPEED SENSOR
DTC LogicINFOID:0000000006222248
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Start the engine and drive at 30 km/h (19 MPH) or more for approximately 1minute.
2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC
“P1808” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-53, "DTC Logic".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222249
1.PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
With CONSULT-III
Perform self-diagnosis for “ABS”.
Is any DTCs detected?
YES >> Check the DTCs.
NO >> GO TO 2.
2.ERASE SELF-DIAGNOSTIC RESULT
With CONSULT-III
1. Erase self-diagnostic results for “ALL MODE AWD/4WD”.
2. Start the engine and drive vehicle at 30 km/h (19 MPH) or more.
3. Check that ABS warning lamp turns OFF.
Does ABS warning lamp turn OFF?
YES >> GO TO 3.
NO >> Refer to BRC-122, "
Diagnosis Procedure".
3.CHECK TERMINALS AND HARNESS CONNECTORS
Check transfer control unit pin terminals for damage or loose connection with harness connector.
Is inspection result normal?
YES >> After turning the ignition switch OFF, perform DTC confirmation procedure again. When DTC
"P1808" is detected, Replace transfer control unit. Refer to DLN-107, "
Removal and Installation".
NO >> Repair or replace error-detected parts.
DTC Display item Malfunction detected condition Possible cause
P1808 VHCL SPEED SEN-ABS  Malfunction is detected in vehicle
speed signal that is output from ABS
actuator and electric unit (control unit)
through CAN communication.
 Improper signal is input while driving.  Harness or connector (CAN communi-
cation line)
 Malfunction of ABS actuator and elec-
tric unit (control unit)
- Malfunction of ABS actuator and elec-
tric unit (control unit) circuit error
- Vehicle speed signal error
Revision: 2010 May2011 QX56

DLN-54
< DTC/CIRCUIT DIAGNOSIS >[TRANSFER: ATX90A]
P180C SENSOR POWER SUPPLY (5V)
P180C SENSOR POWER SUPPLY (5V)
DescriptionINFOID:0000000006222250
Supplies power (5V) to transfer lock position sensor and transfer rotary position sensor.
DTC LogicINFOID:0000000006222251
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Turn the ignition switch OFF to ON.
2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC
“P180C” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-54, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222252
1.CHECK TRANSFER LOCK POSITION SENSOR POWER SUPPLY (1)
1. Turn the ignition switch OFF.
2. Disconnect transfer lock position sensor harness c onnector and transfer rotary position sensor harness
connector.
3. Turn the ignition switch ON.
CAUTION:
Never start the engine.
4. Check the voltage between transfer lock position sensor harness connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK TRANSFER LOCK POSITION SENSOR 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.
DTC Display item Malfunction detected condition Possible cause
P180C SEN POWER SUPPLY (5V) When the sensor power supply (5V) volt-
age is lower or higher than normal. Malfunction of transfer lock position
sensor power supply circuit (open or
short)
 Malfunction of transfer rotary position
sensor power supply circuit (open or
short)
+ −
Voltag e
Transfer lock position sensor
Connector Terminal F40 1 2 Approx. 5 V
Revision: 2010 May2011 QX56

P180C SENSOR POWER SUPPLY (5V)DLN-55
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
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4. Check the continuity between transfer lo ck position sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
3.CHECK TRANSFER LOCK 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 lock pos ition sensor harness connector terminals.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace transfer lock position sensor. Refer to DLN-119, "
Removal and Installation".
4.CHECK TRANSFER ROTARY POSITION SENSOR POWER SUPPLY (1)
1. Turn the ignition switch OFF.
2. Connect transfer control unit 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 6.
NO >> GO TO 5.
5.CHECK TRANSFER ROTARY POSITION SENSOR 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 rotary position sensor
harness connector.
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
+ −
Vo l ta g e
Transfer lock position sensor
Connector Terminal F40 1 2 Approx. 5 V
+ −
Vo l ta g e
Transfer rotary position sensor
Connector Terminal F41 1 2 Approx. 5 V
Revision: 2010 May2011 QX56