display INFINITI QX56 2011 Factory Service Manual

DLN-26
< ECU DIAGNOSIS INFORMATION >[TRANSFER: ATX90A]
TRANSFER CONTROL UNIT
*1: 4WD shift swich (2WD) is not equipped, but it is displayed.
*2: This indicator is not equipped, but it is displayed.
*3: This switch is not equipped, but it is displayed.
TERMINAL LAYOUT
PHYSICAL VALUES
COMPR VHCL SPEEDVehicle stopped 0.00 km/h (0.00 mph)
Vehicle driving
CAUTION:
Check air pressure of tire under standard condition. Approx. equal to the indication
on speedometer (inside of ±10
%)
VHCL/S SEN-FR Vehicle stopped 0.00 km/h (0.00 mph)
Vehicle driving
CAUTION:
Check air pressure of tire under standard condition. Approx. equal to the indication
on speedometer (inside of ±10
%)
VHCL/S SEN-RR Vehicle stopped 0.00 km/h
Vehicle driving
CAUTION:
Check air pressure of tire under standard condition. Approx. equal to the indication
on speedometer (inside of ±10
%)
ENGINE SPEED Engine running Approx. equal to the indication
on tachometer (inside of ±10 %)
INTRNL SPEED SEN 4WD mode: AUTO
A/T shift selector: DDepress the accelerator pedal several
times.
Value is changing
TRANSFER TORQUE 4WD shift switch: AUTO 0 - 2250 N·m
4WD shift switch: 4H 0 - 2250 N·m
4WD shift switch: 4L 0 Nm
UNIT PARAMETER Always A1 - A9
B1 - B9
C1 - C9
D1 - D9
E1 - E9F1 - F9
G1 - G9 H1 - H9 J1 - J9
Monitor item Condition Value/Status
JPDIE0229ZZ
Te r m i n a l N o .
(Wire color) Description
Condition Value (Approx.)
+ - Signal name Input/
Output
6
(BR) Ground Hi-Lo position sensor 1 Input/
Output Engine run-
ning
(Never
drive the
vehicle.) 4WD mode: AUTO or 4H 0 V
4WD mode: Shifting 0 V
4WD mode: 4L 5 V
Revision: 2010 May2011 QX56

TRANSFER CONTROL UNITDLN-29
< ECU DIAGNOSIS INFORMATION > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
DTC Inspection Priority ChartINFOID:0000000006222229
If some DTCs are displayed at the same time, per form inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000006222230
Priority Detected items (DTC)
1  U1000 CAN COMM CIRCUIT
 U1010 CONTROL UNIT (CAN)
2  P1802 CONTROL UNIT 1
 P1803 CONTROL UNIT 2
 P1804 CONTROL UNIT 3
 P1809 CONTROL UNIT 4
 P180C SEN POWER SUPPLY (5V)
 P180E SEN POWER SUPPLY (8V)
 P1811 BATTERY VOLTAGE
 P181B INCOMP SELFSHUT
 P181C MOTOR POWER SUPPLY
 P181F INCOMP CALIBRATION
3  P1807 VECL SPEED SEN-AT
 P1808 VECL SPEED SEN-ABS
 P1816 PNP SW/CIRC
 P181E ST ANGLE SEN SIG
 P1820 ENGINE SPEED SIG
 P1829 THROTTLE POSI SEN
 P1830 ABS OP SIG
 P1831 VDC OP SIG
 P1832 TCS OP SIG
4  P180D ROTARY POSITION SEN
 P1813 4WD MODE SW
 P181A MOTOR TEMP SEN
 P1826 OIL TEMP SEN
 P182A HI-LO POSITION SEN
 P182B LOCK POSITION SEN
5  P180F MOTOR SYSTEM
 P1817 SHIFT ACTUATOR
DTC Display Items Reference
P1802 CONTROL UNIT 1 DLN-51, "
DTC Logic"
P1803 CONTROL UNIT 2DLN-51, "DTC Logic"
P1804 CONTROL UNIT 3DLN-51, "DTC Logic"
P1807 VHCL SPEED SEN-ATDLN-52, "DTC Logic"
P1808 VHCL SPEED SEN-ABSDLN-53, "DTC Logic"
P1809 CONTROL UNIT 4DLN-51, "DTC Logic"
P180C SEN POWER SUPPLY (5V) DLN-54, "DTC Logic"
P180D ROTARY POSITION SENDLN-57, "DTC Logic"
P180E SEN POWER SUPPLY (8V)DLN-59, "DTC Logic"
P180F MOTOR SYSTEMDLN-61, "DTC Logic"
P1811 BATTERY VOLTAGEDLN-64, "DTC Logic"
P1813 4WD MODE SW DLN-67, "DTC Logic"
P1816 PNP SW/CIRCDLN-69, "DTC Logic"
P1817 SHIFT ACTUATORDLN-70, "DTC Logic"
P181A MOTOR TEMP SEN DLN-72, "DTC Logic"
P181B IMCOMP SELFSHUTDLN-74, "DTC Logic"
Revision: 2010 May2011 QX56

DLN-30
< ECU DIAGNOSIS INFORMATION >[TRANSFER: ATX90A]
TRANSFER CONTROL UNIT
P181C MOTOR POWER SUPPLY
DLN-76, "DTC Logic"
P181E ST ANGLE SEN SIGDLN-77, "DTC Logic"
P181F INCOMP CALIBRATIONDLN-78, "DTC Logic"
P1826 OIL TEMP SENDLN-80, "DTC Logic"
P1820 ENGINE SPEED SIGDLN-79, "DTC Logic"
P1829 THROTTLE POSI SENDLN-82, "DTC Logic"
P182A HI-LO POSITION SEN DLN-83, "DTC Logic"
P182B LOCK POSITION SENDLN-85, "DTC Logic"
P1830 ABS OP SIGDLN-88, "DTC Logic"
P1831 VDC OP SIGDLN-89, "DTC Logic"
P1832 TCS OP SIGDLN-90, "DTC Logic"
U1000 CAN COMM CIRCUIT DLN-91, "DTC Logic"
U1010 CONTROL UNIT (CAN)DLN-92, "DTC Logic"
DTC Display Items Reference
Revision: 2010 May2011 QX56

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

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