INFINITI QX56 2011 Factory Service Manual

CONFIGURATION (TRANSFER CONTROL UNIT)DLN-49
< BASIC INSPECTION > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
When the alphabet of transfer cont rol actuator parameter is “C”.
When the alphabet of transfer cont rol actuator parameter is “H”.
When the alphabet of transfer cont rol actuator parameter is “N”.
NOTE:
For the sample illustrations, the new alphabet of unit parameter is “F”.
- Add the same number of unit parameter behind the new alphabet of unit parameter. NOTE:
For the sample illustration, the number of unit parameter is “3” and new unit parameter is “F3”.
2. Turn the ignition switch OFF to ON.
3. Select “UNIT CHARACTERISTICS WRITE” of CONSULT-III “WORK SUPPORT” for “ALL MODE AWD/
4WD”.
4. Input new unit parameter.
5. Select “Start”.
6. Check that "UNIT CHARACTERIS TICS WRITE COMPLETED" or "UNIT CHARACTERISTICS WRITE
ALREADY WRITTEN" is displayed.
>> WORK END.
3.WRITE UNIT PARAMETER (2)
With CONSULT-III
1. Make the new unit parameter with the following procedure.
- Confirm the alphabet of unit parameter (A).
NOTE:
 This illustration is sample.
 For this illustration, the unit parameter is “G3” and the alpha- bet of unit parameter is “G”.
- Confirm the alphabet of transfer control actuator parameter (B). NOTE:
 Original transfer control actuator does not have marking of
alphabet.
 Just in case that transfer cont rol actuator has been replaced, it
has marking of alphabet.
 This illustration is sample of replaced transfer control actuator.
 For this illustration, the alphabet of transfer control actuator parameter is “H”.
The alphabet of original unit parameter A B C D E F G H J
↓ ↓↓↓↓↓↓↓↓↓
The new alphabet of unit parameter A B C C D E E F G
The alphabet of original unit parameter A B C D E F G H J ↓ ↓↓↓↓↓↓↓↓↓
The new alphabet of unit parameter B C D D E F F G H
The alphabet of original unit parameter A B C D E F G H J ↓ ↓↓↓↓↓↓↓↓↓
The new alphabet of unit parameter C D E E F G G H J
JPDIE0258ZZ
JPDIE0294ZZ
Revision: 2010 May2011 QX56

DLN-50
< BASIC INSPECTION >[TRANSFER: ATX90A]
CONFIGURATION (TRANSFER CONTROL UNIT)
- Make new alphabet of unit palameter as to the alphabet
s of unit palameter and the transfer control actua-
tor parameter, using following chart.
When the alphabet of transfer control actuator parameter is “C”.
When the alphabet of transfer control actuator parameter is “H”.
When the alphabet of transfer control actuator parameter is “N”.
NOTE:
For the sample illustrations, the new alphabet of unit parameter is “F”.
- Add the same number of unit parameter behind the new alphabet of unit parameter.
NOTE:
For the sample illustration, the number of unit parameter is “3” and new unit parameter is “F3”.
2. Turn the ignition switch OFF to ON.
3. Select “UNIT CHARACTERISTICS WRITE” of CO NSULT-III “WORK SUPPORT” for “ALL MODE AWD/
4WD”.
4. Input new unit parameter.
5. Select “Start”.
6. Check that "UNIT CHARACTERISTICS WRITE CO MPLETED" or "UNIT CHARACTERISTICS WRITE
ALREADY WRITTEN" is displayed.
>> WORK END.
4.WRITE UNIT PARAMETER (3)
With CONSULT-III
1. Confirm the unit parameter (A). NOTE:
 This illustration is sample.
 For this illustration, the unit parameter is “G3”.
2. Turn the ignition switch OFF to ON.
3. Select “UNIT CHARACTERISTI CS WRITE” of CONSULT-III
“WORK SUPPORT” for “ALL MODE AWD/4WD”.
4. Input unit parameter.
5. Select “Start”.
6. Check that "UNIT CHARACT ERISTICS WRITE COMPLETED"
or "UNIT CHARACTERISTICS WRITE ALREADY WRITTEN" is
displayed.
>> WORK END.
The alphabet of original unit parameter A B C D E F G H J ↓ ↓↓↓↓↓↓↓↓↓
The new alphabet of unit parameter A B C C D E E F G
The alphabet of original unit parameter A B C D E F G H J ↓ ↓↓↓↓↓↓↓↓↓
The new alphabet of unit parameter B C D D E F F G H
The alphabet of original unit parameter A B C D E F G H J ↓ ↓↓↓↓↓↓↓↓↓
The new alphabet of unit parameter C D E E F G G H J
JPDIE0258ZZ
Revision: 2010 May2011 QX56

P1802, P1803, P1804, P1809 TRANSFER CONTROL UNIT
DLN-51
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
DTC/CIRCUIT DIAGNOSIS
P1802, P1803, P1804, P1809 TRANSFER CONTROL UNIT
DTC LogicINFOID:0000000006222244
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”.
Are DTC
′s “P1802, P1803, P1804 or P1809” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-51, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222245
1.PERFORM SELF-DIAGNOSIS
With CONSULT-III
1. Erase self-diagnostic results for “ALL MODE AWD/4WD”.
2. Turn the ignition switch OFF, and then wait 10 seconds and more.
3. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Are DTC
′s “P1802, P1803, P1804 or 1809” detected?
YES >> Replace transfer control unit. Refer to DLN-107, "Removal and Installation".
NO >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace error-detected parts.
DTC Display item Malfunction detected condition Possible cause
P1802 CONTROL UNIT 1 Malfunction is detected in the memory
(RAM) system of transfer control unit.
Internal malfunction of transfer control
unit.
P1803 CONTROL UNIT 2
Malfunction is detected in the memory
(ROM) system of transfer control unit.
P1804 CONTROL UNIT 3 Malfunction is detected in the memory
(EEOROM) system of transfer control
unit.
P1809 CONTROL UNIT 4 AD converter system of transfer control
unit is malfunctioning.
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]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
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]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
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

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

P180D TRANSFER ROTARY POSITION SENSORDLN-57
< DTC/CIRCUIT DIAGNOSIS > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
P180D TRANSFER ROTARY POSITION SENSOR
DTC LogicINFOID:0000000006222253
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
“P180D” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-57, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222254
1.CHECK TRANSFER ROTARY POSITION SENSOR SIGNAL
1. Turn the ignition switch ON.
2. Check the voltage between transfer control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 2.
2.CHECK TRANSFER ROTARY POSI TION SENSOR POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect transfer rotary pos ition 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.
DTC Display item Malfunction detected condition Possible cause
P180D ROTARY POSITION SEN Malfunction is detected in transfer rotary
position sensor.Transfer rotary position sensor
 Transfer rotary po
sition sensor error
 Transfer rotary posi tion sensor circuit
error
+
−Vol tag e
Transfer control unit
Connector Terminal
E59 15 Ground
JPDIE0268GB
+ −
Vo l ta g e
Transfer rotary position sensor
Connector Terminal F41 1 2 Approx. 5 V
Revision: 2010 May2011 QX56

DLN-58
< DTC/CIRCUIT DIAGNOSIS >[TRANSFER: ATX90A]
P180D TRANSFER ROTARY POSITION SENSOR
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.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.
4. Check the continuity between transfer rotary position sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace error-detected parts.
4.CHECK TRANSFER ROTARY POSITION 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 rotary position sensor
harness connector.
4. Check the continuity between transfer rotary position sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace error-detected parts.
5.REPLACE TRANSFER ROTARY POSITION SENSOR
1. Replace transfer rotary position sensor. Refer to DLN-117, "
Removal and Installation".
2. Perform confirmation procedure again. Refer to DLN-57, "
DTC Logic".
Is DTC
“P180D” detected?
YES >> GO TO 6.
NO >> INSPECTION END
6.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
Transfer control unit Transfer rotary position sensor Continuity
Connector Terminal Connector Terminal
E59 15 F41 3 Existed
Transfer rotary position sensor —Continuity
Connector Terminal
F41 3 Ground Not existed
Revision: 2010 May2011 QX56