2011 INFINITI QX56 ignition

PRECAUTIONSDLN-7
< PRECAUTION > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
5. When the repair work is completed, re-connect both 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 ignition switch is turned to LOCK position.)
6. Perform self-diagnosis check of a ll control units using CONSULT-III.
Service Notice or Precautions for TransferINFOID:0000000006222211
CAUTION:
 Use Genuine NISSAN Transfer Fluid. Refer to MA-10, "
Fluids and Lubricants".
 Never reuse transfer fluid, once it has been drained.
 Check the fluid level or repl ace the fluid only with the vehicle parked on level ground.
 During removal or installati on, keep inside of transfer clear of dust or dirt.
 Replace all tires at the same time. Always use tir es of the proper size and the same brand and pat-
tern. Fitting improper size and unusually worn tires applies excessive force to vehicle mechanism
and can cause longitudinal vibration.
 Disassembly should be done in a clean work area, it is preferable to work in dustproof area.
 Before proceeding with disassembly, thoroughly clean the transfer. It is important to prevent the
internal parts from becoming contamin ated by dirt or other foreign matter.
 All parts should be carefully cl eaned with a general purpose, non-flammable solvent before inspec-
tion or reassembly.
 Check for the correct installation status prior to removal or disassembly. If matching marks are
required, be certain they do not interfere wit h the function of the parts when applied.
 Check appearance of the disassembled parts for damage, deformation, and unusual wear. Replace
them with a new ones if necessary.
 Gaskets, seals and O-rings should be replaced any time the transfer is disassembled.
 In principle, tighten bolts or nu ts gradually in several steps workin g diagonally from inside to out-
side. If tightening sequence is specified, use it.
 Observe the specified torque when assembling.
 Clean and flush the parts su fficiently and blow-dry them.
 Be careful not to damage sliding surfaces and mating surfaces.
 Clean inner parts with lint-free cloth or towels . Do not use cotton work gloves and rags to prevent
adhering fibers.
Revision: 2010 May2011 QX56

DLN-20
< SYSTEM DESCRIPTION >[TRANSFER: ATX90A]
SYSTEM
4WD Warning Lamp
 Turns ON when there is a malfunction in 4WD system. 4W
D warning lamp indicates the vehicle is in fail-safe
mode.
 Also turns ON when ignition switch is turned ON, fo r the purpose of lamp check. Turns OFF approximately
for 1 second after the engine starts if system is normal.
ATP Warning Lamp
When the A/T shift selector is in P position, the vehicle may move if the transfer case in neutral. ATP warning
lamp is turned on to indicate this condition to the driver.
CONDITION FOR OPERATE WARNING BUZZER
For preventing an incorrect operation during 4H ⇔4L switching, warning buzzer sounds from inside of transfer
control unit and warns the driver, when certain conditions are satisfied.
4WD SYSTEM : Fail-SafeINFOID:0000000006303692
 If any malfunction occurs in 4WD electrical system, and control unit detects the malfunction, 4WD warning
lamp on combination meter turns ON to indicate system malfunction.
 When 4WD warning lamp is ON, vehicle changes to rear-wheel drive or shifts to 4-wheel drive (front-wheels
still have some driving torque).
Condition 4WD warning lamp
Lamp check Turns ON when ignition switch is turned ON. Turns OFF ap-
prox. 1 second after the engine start.
4WD system malfunction ON
Protection function is activated due to heavy load to transfer assem-
bly. (4WD system is not malfunctioning.) Quick blinking: 2 times/second
(Blinking in approx. 1 minute and then turning OFF)
Large difference in diameter of front/rear tires Slow blinking: 1 time/2 seconds
(Continuing to blink until turning ignition switch OFF)
Other than above (system normal) OFF
Condition Warning buzzer
4WD shift status A/T shift selector Engine speed
4H⇔4L N range 350
− 1.600 rpm OFF
Under 350 rpm or over 1.600 rpm ON
Except N range Always
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
DLN-21
< SYSTEM DESCRIPTION > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
DIAGNOSIS SYSTEM (TRA NSFER CONTROL UNIT)
CONSULT-III FunctionINFOID:0000000006222226
FUNCTION
CONSULT-III can display each diagnostic item using the diagnostic test modes as follows.
*: The following diagnosis information is erased by erasing.
DTC
ECU IDENTIFICATION
Transfer control unit part number can be read.
SELF DIAGNOSTIC RESULT
Refer to DLN-29, "DTC Index".
When "0" is displayed on self-diagnosis result.
 The system is presently malfunctioning.
When except "0" is displayed on self-diagnosis result. System malfunction in the past is detec ted, but the system is presently normal.
NOTE:
Each time when ignition switch is turned OFF to ON, numerical number increases in 1 →2→ 3...110 →111 .
When the operation number of times exceeds 111, the number do not increase and “111” is displayed until
self-diagnosis is erased
*.
*: For “U1000” and “U1010”, the maximum value is “39”.
DATA MONITOR
X:Applicable
Diagnostic test mode Function
ECU Identification Transfer control unit part number can be read.
Self Diagnostic Result Self-diagnostic results can be read and erased quickly.*
Data Monitor Input/Output data in the transfer control unit can be read.
Work Support This mode enables a technican to adjust some devices faster and more accurately by following the
indications on the CONSULT-III
Monitor item (Unit) SELECT MONITOR ITEM
Remarks
ECU INPUT
SIGNALS MAIN SIG-
NALS
4WD MODE [BOTNG/SWTNG/4L/4H/AUTO] X Control status of 4WD mode is displayed.
2WD SW [On/Off] X 4WD shift switch (2WD) is not equipped, but it
is displayed.
AUTO SW [On/Off] X 4WD shift switch signal (AUTO) is displayed.
4H SW [On/Off] X 4WD shift switch signal (4H) is displayed.
4L SW [On/Off] X 4WD shift switch signal (4L) is displayed.
T/M RANGE [D/N/R/P] X A/T shift selector position via CAN communica-
tion line is displayed.
N RANGESW [On/Off] X A/T shift selector position (N) via CAN commu-
nication line is displayed.
R RANGE SW [On/Off] X A/T shift selector position (R) via CAN commu-
nication line is displayed.
ING SW [On/Off] X Ignition switch status is displayed.
TCS OPER [On/Off] X TCS operation status via CAN communication
line is displayed.
VDC OPER [On/Off] X VDC operation status via CAN communication
line is displayed.
Revision: 2010 May2011 QX56

TRANSFER CONTROL UNITDLN-27
< ECU DIAGNOSIS INFORMATION > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
7
(Y) Ground
Transfer fluid tempera-
ture sensor power supply Input Engine running 0 – 5V
9
(G) Ground Transfer internal speed
sensor (GND) —Always 0 V
10
(Y/G) Ground Transfer internal speed
sensor (IMP)
Input IGN ON Transfer motor driving
11
(V) Ground 4WD shift SW (4Lo) Input IGN ON 4WD shift switch: 4L Battery voltage
4WD shift switch: Except
4L
0 V
12
(L) —CAN-H Input/
Output ——
13
(P) —CAN-L
Input/
Output ——
14
(W/R) Ground 4WD shift SW (AUTO) Input IGN ON 4WD shift switch: AUTO Battery voltage
4WD shift switch: Except
AUTO
0 V
15
(P/B) Ground Transfer rotary position
sensor (PWM)
Input IGN ON
16
(LG) Ground
Transfer rotary position
sensor (GND) —Always 0 V
17
(W/L) Ground Transfer lock position
sensor power supply InputIGN ON 5V
10 seconds or more later after ignition
switch turned OFF 0V
18
(BR/Y) Ground Transfer rotary position
sensor power supply
InputIGN ON 5V
10 seconds or more later after ignition
switch turned OFF 0V
20
(GR) Ground
Transfer control unit pow-
er supply Input Always Battery voltage
25
(P/L) Ground Hi-Lo position sensor 3 Input/
Output Engine
running
(Never
drive the
vehicle.) 4WD mode: AUTO or 4H 0 V
4WD mode: Shifting 5 V
4WD mode: 4L 5 V
28
(W) Ground
Transfer motor tempera-
ture sensor power supply InputIGN ON 0 – 5V
IGN OFF 0V
Te r m i n a l N o .
(Wire color) Description
Condition Value (Approx.)
+ - Signal name Input/
Output
JPDIE0267GB
JPDIE0268GB
Revision: 2010 May2011 QX56

ADDITIONAL SERVICE WHEN REPLACING TRANSFER CONTROL UNIT
DLN-41
< BASIC INSPECTION > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
ADDITIONAL SERVICE WHEN RE PLACING TRANSFER CONTROL UNIT
DescriptionINFOID:0000000006222234
Perform writing unit parameter and initial calibration after replacing transfer control unit. Refer to DLN-41,
"Work Procedure".
Work ProcedureINFOID:0000000006222235
NOTE:
In fail-safe mode, can not perform work support. (Except that DTC P181F is detected.)
1.WRITE UNIT PARAMETER
Perform writing unit parameter to control unit. Refer to DLN-48, "
Work Procedure".
>> GO TO 2.
2.INITIAL CALIBRATION (1)
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.
Does the transfer motor operate automatically?
YES >> After the transfer motor operation st op (After approximately 10 seconds) GO TO 4.
NO >> GO TO 3.
3.INITIAL CALIBRATION (2)
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-42
< BASIC INSPECTION >[TRANSFER: ATX90A]
ADDITIONAL SERVICE WHEN
REPLACING TRANSFER ASSEMBLY
ADDITIONAL SERVICE WHEN REPLACING TRANSFER ASSEMBLY
DescriptionINFOID:0000000006222236
Perform writing unit parameter, transfer fluid viscosity learning and initial calibration after replacing transfer
assembly. Refer to DLN-42, "
Work Procedure".
Work ProcedureINFOID:0000000006222237
NOTE:
In fail-safe mode, can not perform work s upport. (Except that DTC P181F is detected.)
1.WRITE UNIT PARAMETER
Perform writing unit parameter to control unit. Refer to DLN-48, "
Work Procedure".
>> GO TO 2.
2.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 more than 10 seconds.
>> GO TO 3.
3.PERFORM 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 4.
4.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 5.
5.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”.
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 LOCK POSITION SENSOR LEARNING
DLN-45
< BASIC INSPECTION > [TRANSFER: ATX90A]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
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