2011 INFINITI QX56 ABS

DIAGNOSIS SYSTEM (BCM)DLK-43
< SYSTEM DESCRIPTION >
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*: OFF is displayed when brake pedal is depressed while brake switch power supply is OFF.
ACTIVE TEST
S/L LOCK-IPDM Indicates [On/Off] condition of steering lock unit (LOCK)
S/L UNLK-IPDM Indicates [On/Off] condition of steering lock unit (UNLOCK)
S/L RELAY-REQ Indicates [On/Off] condition of steering lock relay
VEH SPEED 1 Display the vehicle speed signal received from combination meter by numerical value [Km/h]
VEH SPEED 2 Display the vehicle spee d signal received from ABS or VDC or TCM by numerical value [Km/h]
DOOR STAT-DR Indicates [LOCK/READY/UNLK] condition of unlock sensor
DOOR STAT-AS Indicates [LOCK/READY/UNLK] condition of passenger side door status
ID OK FLAG Indicates [Set/Reset] condition of key ID
PRMT ENG STRT Indicates [Set/Reset] condition of engine start possibility
PRMT RKE STRT NOTE:
This item is displayed, but cannot be monitored
TRNK/HAT MNTR NOTE:
This item is displayed, but cannot be monitored
RKE-LOCK Indicates [On/Off] condition of LOCK signal from Intelligent Key
RKE-UNLOCK Indicates [On/Off] condition of UNLOCK signal from Intelligent Key
RKE-TR/BD NOTE:
This item is displayed, but cannot be monitored
RKE-PANIC Indicates [On/Off] condition of PANIC button of Intelligent Key
RKE-MODE CHG Indicates [On/Off] condition of MODE CHANGE signal from Intelligent Key
RKE OPE COUN1 When remote keyless entry receiver receives the signal transmitted while operating on Intelli-
gent Key, the numerical value start changing
RKE OPE COUN2 NOTE:
This item is displayed, but cannot be monitored
Monitor Item Condition
Test item Description
BATTERY SAVER This test is able to check interior room lamp operation
 On: Operate
 Off: Non-operation
OUTSIDE BUZZER This test is able to check Intelligent Key warning buzzer operation
 On: Operate
 Off: Non-operation
INSIDE BUZZER This test is able to check warning chime in combination meter operation
 Take Out: Take away warning chime sounds when CONSULT-III screen is touched
 Key: Key warning chime sounds when CONSULT-III screen is touched
 Knob: OFF position warning chime sounds when CONSULT-III screen is touched
 Off: Non-operation
INDICATOR This test is able to check warning lamp operation
 KEY ON: “KEY” Warning lamp illuminates when CONSULT-III screen is touched
 KEY IND: “KEY” Warning lamp blinks when CONSULT-III screen is touched
 Off: Non-operation
INT LAMP This test is able to check interior room lamp operation
 On: Operate
 Off: Non-operation
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (AUTOMATIC BACK DOOR CONTROL UNIT)
DLK-45
< SYSTEM DESCRIPTION >
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DIAGNOSIS SYSTEM (AUTOMATIC BACK DOOR CONTROL UNIT)
CONSULT-III Function (AUTOMATIC BACK DOOR CONTROL UNIT)INFOID:0000000006225858
APPLICATION ITEM
CONSULT-III performs the following functions via CA N communication with automatic back door control unit.
DATA MONITOR
SELF-DIAG RESULT
Refer to DLK-50, "DTCIndex".
Diagnosis mode Function Description
Self Diagnostic Result Displays the diagnosis results judged by automatic back door control unit
CAN Diag Support Monitor Monitors the reception status of CAN communication viewed from automatic back door
control unit
Data Monitor The automatic back door control unit input/output signals are displayed
Ecu Identification The automatic back door control unit part number is displayed
Monitor Item Unit Description
VHCL SPEED MTR [km/h] Display the vehicle speed signal received from combination meter by nu-
merical value
VHCL SPEED ABS [km/h] Display the vehicle speed
signal received from ABS actuator and electrical
unit by numerical value
VHCL SPEED SIG [NORMAL/ER-
ROR] Indicates condition of vehicle speed from automatic back door control unit
MAIN SW [ON/OFF] Indicates condition of automatic back door main switch
AUTO BD SW [ON/OFF] Indicates condition of automatic back door switch
BK DOOR CL SW [ON/OFF] Indicates condition of automatic back door close switch
UNLOCK SEN DR [ON/OFF] Indicates condition of unlock sensor
OPEN SW [ON/OFF] Indicates condition of open switch
CLOSE SW [ON/OFF] Indicates condition of close switch
HALF LATCH SW [ON/OFF] Indicates condition of half latch switch
TOUCH SEN RH [ON/OFF/OPEN] Indicates condition of touch sensor RH
TOUCH SEN LH [ON/OFF/OPEN] Indicates condition of touch sensor LH
P RANGE IND [ON/OFF] Indicates condition of P range signal from combination meter
RKE REQ [OFF/MOVE/
REV] Indicates condition of remote keyless entry signal from BCM
IGN SW [ON/OFF] Indicates condition of IGN power supply
ENCODER A [LO/HI] Indicates condition of encoder signal from encoder A
ENCODER B [LO/HI] Indicates condition of encoder signal from encoder B
BD OPENER SW [ON/OFF] Indicates condition of back door opener switch
UNLOCK SEN BD [LOCK/
UNLOCK] NOTE:
This item is displayed, but cannot be monitored
DESTINATION [JPN/NAM] Indicates specification of destination of the automatic back door system
HAZARD [ON/OFF] Indica tes specification of hazard warning
Revision: 2010 May2011 QX56

AUTOMATIC BACK DOOR CONTROL MODULEDLK-47
< ECU DIAGNOSIS INFORMATION >
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AUTOMATIC BACK DOOR CONTROL MODULE
Reference ValueINFOID:0000000006225860
VALUES ON THE DIAGNOSIS TOOL
CONSULT-III MONITOR ITEM
Monitor Item Condition Value/Status
VHCL SPEED MTR While driving Equivalent to speedometer
reading
VHCL SPEED ABS While driving Equivalent to speedometer
reading
VHCL SPEED SIG Vehicle speed from automatic back
door control unit Normal NORMAL
Error ERROR
MAIN SW Automatic back door main switch OFF OFF
ON ON
AUTO BD SW Automatic back door switch Release OFF
Press ON
BK DOOR CL SW Automatic back door close switch Release OFF
Press ON
UNLOCK SEN DR Door lock (driver) Unlock OFF
Lock ON
OPEN SW Back door Half latch/fully closed OFF
Open ON
CLOSE SW Back door Open/half latch OFF
Fully closed ON
HALF LATCH SW Back door Half latch/fully closed OFF
Open ON
TOUCH SEN RH Touch sensor RH Other than bellow OFF
Detect obstruction ON
TOUCH SEN LH Touch sensor LH Other than bellow OFF
Detect obstruction ON
P RANGE IND Selector lever Other than P position OFF
P position ON
RKE REQ Intelligent Key button (back door) Release OFF
Press (more than 0.5 sec-
ond)
MOVE
Press (just after) REV
IGN SW Ignition switch Other than ON position OFF
ON position ON
ENCODER A Automatic back door Not operate No change HI or LO
Operate Change HI or LO
ENCODER B Automatic back door Not operate No change HI or LO
Operate Change HI or LO
BD OPENER SW Back door opener switch Release OFF
Press ON
UNLOCK SEN BD Door lock (back door) Unlock OFF
Lock ON
Revision: 2010 May2011 QX56

DLN-2
Work Procedure ......................................................47
CONFIGURATION (TRANSFER CONTROL
UNIT) ..................................................................
48
Description ........................................................... ...48
Work Procedure ......................................................48
DTC/CIRCUIT DIAGNOSIS ...................... ...51
P1802, P1803, P1804, P1809 TRANSFER
CONTROL UNIT ............................................. ...
51
DTC Logic ............................................................ ...51
Diagnosis Procedure ..............................................51
P1807 OUT PUT SHAFT SPEED SENSOR ......52
DTC Logic ............................................................ ...52
Diagnosis Procedure ..............................................52
P1808 WHEEL SPEED SENSOR ......................53
DTC Logic ............................................................ ...53
Diagnosis Procedure ..............................................53
P180C SENSOR POWER SUPPLY (5V) ..........54
Description ........................................................... ...54
DTC Logic ...............................................................54
Diagnosis Procedure ..............................................54
P180D TRANSFER ROTARY POSITION
SENSOR ............................................................
57
DTC Logic ............................................................ ...57
Diagnosis Procedure ..............................................57
P180E SENSOR POWER SUPPLY (8V) ...........59
Description ........................................................... ...59
DTC Logic ...............................................................59
Diagnosis Procedure ..............................................59
P180F TRANSFER INTERNAL SPEED SEN-
SOR ....................................................................
61
DTC Logic ............................................................ ...61
Diagnosis Procedure ..............................................61
P1811 POWER SUPPLY CIRCUIT FOR
TRANSFER CONTROL UNIT ............................
64
Description ........................................................... ...64
DTC Logic ...............................................................64
Diagnosis Procedure ..............................................64
P1813 4WD MODE SWITCH .............................67
DTC Logic ............................................................ ...67
Diagnosis Procedure ..............................................67
Component Inspection ............................................68
P1816 PARKING/NEUTRAL POSITION
SWITCH .............................................................
69
DTC Logic ............................................................ ...69
Diagnosis Procedure ..............................................69
P1817 TRANSFER MOTOR ..............................70
DTC Logic ............................................................ ...70
Diagnosis Procedure ..............................................70
Component Inspection ......................................... ...71
P181A TRANSFER MOTOR TEMPERATURE
SENSOR ............................................................
72
DTC Logic ............................................................ ...72
Diagnosis Procedure ...............................................72
Component Inspection ............................................73
P181B INCOMPLETE SELFSHUT ....................74
DTC Logic ............................................................ ...74
Diagnosis Procedure ...............................................74
P181C TRANSFER MOTOR POWER SUP-
PLY ....................................................................
76
Description ........................................................... ...76
DTC Logic ...............................................................76
Diagnosis Procedure ...............................................76
P181E STEERING ANGLE SENSOR ...............77
DTC Logic ............................................................ ...77
Diagnosis Procedure ...............................................77
P181F INCOMPLETE CALIBRATION ..............78
DTC Logic ............................................................ ...78
Diagnosis Procedure ...............................................78
P1820 ENGINE SPEED SIGNAL ......................79
DTC Logic ............................................................ ...79
Diagnosis Procedure ...............................................79
P1826 TRANSFER FLUID TEMPERATURE ....80
DTC Logic ............................................................ ...80
Diagnosis Procedure ...............................................80
Component Inspection ............................................81
P1829 ACCELERATOR PEDAL POSITION
SENSOR ............................................................
82
DTC Logic ............................................................ ...82
Diagnosis Procedure ...............................................82
P182A TRANSFER HI-LO POSITION SEN-
SOR ...................................................................
83
DTC Logic ............................................................ ...83
Diagnosis Procedure ...............................................83
P182B TRANSFER LOCK POSITION SEN-
SOR ...................................................................
85
DTC Logic ............................................................ ...85
Diagnosis Procedure ...............................................85
P1830 ABS OPERATION SIGNAL ...................88
DTC Logic ............................................................ ...88
Diagnosis Procedure ...............................................88
P1831 VDC OPERATION SIGNAL ...................89
DTC Logic ............................................................ ...89
Diagnosis Procedure ...............................................89
P1832 TCS OPERATION SIGNAL ....................90
DTC Logic ............................................................ ...90
Diagnosis Procedure ...............................................90
Revision: 2010 May2011 QX56

DLN-10
< SYSTEM DESCRIPTION >[TRANSFER: ATX90A]
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000006222214
1. ECM
Refer to EC-16, "
Component Parts
Location". 2. ABS actuator and electric unit (con-
trol unit)
Refer to BRC-10, "Component Parts
Location". 3. Steering angle sensor
Refer to BRC-10, "
Component Parts
Location".
4. Control valve & TCM Refer to TM-10, "
A/T CONTROL
SYSTEM : Compon ent Parts Loca-
tion". 5. Transfer control unit 6. 4WD switch assembly
7. Transfer lock position sensor 8. Transfer Hi-Lo position sensor 9. Transfer rotary position sensor
10. Transfer control actuator 11. Transfer fluid temperature sensor
A. Back of glove box assembly B. 4WD indicator lamp, 4WD warning lamp, ATP warning lamp (in combina-
tion meter)C. Console assembly
D. Transfer assembly upper side E. Transfer assembly under side
JPDIE0270GB
Revision: 2010 May2011 QX56

COMPONENT PARTSDLN-11
< SYSTEM DESCRIPTION > [TRANSFER: ATX90A]
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Component DescriptionINFOID:0000000006222215
Transfer Control UnitINFOID:0000000006222216
 Transfer control unit operates transfer control act uator, 4WD warning lamp and 4WD mode indicator lamp
according to input signal from 4WD shift switch and each sensor and control unit.
 When 4WD system is malfunctioning, 4WD warning la mp turns ON and fail-safe status activates.
 When protection is necessary, 4WD warning la mp blinks and protection status activates.
Transfer Control ActuatorINFOID:0000000006222217
Transfer control actuator integrates transfer motor, transfer internal position sensor, and transfer motor tem-
perature sensor, and switches 4WD mode (AUTO ⇔4H ⇔4L).
TRANSFER MOTOR
Transfer motor operates according to signal from transfer control unit and switches 4WD mode
(AUTO ⇔4H ⇔4L). It also performs front and rear distri bution of traction force during AUTO mode.
TRANSFER INTERNAL SPEED SENSOR
Transfer internal speed sensor detects rotation status of transfer motor and transmits signal to transfer control
unit.
TRANSFER MOTOR TEMPERATURE SENSOR
 Transfer motor temperature sensor m easures temperature of transfer motor.
Component parts Reference/Function
Transfer control unit DLN-11, "
Transfer Control Unit"
Transfer control actua-
torTransfer motor
DLN-11, "
Transfer Control Actuator"
Transfer internal speed
sensorDLN-11, "Transfer Control Actuator"
Transfer motor temper-
ature sensor
DLN-11, "Transfer Control Actuator"
Transfer Hi-Lo position sensor
DLN-12, "Transfer Hi-Lo Position Sensor"
Transfer rotary position sensorDLN-12, "Transfer Rotary Position Sensor"
Transfer lock position sensorDLN-12, "Transfer Lock Position Sensor"
Transfer fluid temperature sensorDLN-12, "Transfer Fluid Temperature Sensor"
4WD mode switchDLN-18, "4WD SYSTEM : System Description"
4WD indicator lampDLN-18, "4WD SYSTEM : System Description"
4WD warning lampDLN-18, "4WD SYSTEM : System Description"
AT P w a r n i n g l a m pDLN-18, "4WD SYSTEM : System Description"
ABS actuator and electric unit (control unit)Transmits the following signals via CAN communication line to transfer control unit.
 Vehicle speed signal (ABS)
 Stop lamp switch signal (brake signal)
 ABS operation signal
 VDC operation signal
 TCS operation signal
Steering angle sensor Transmits the following signals via CAN communication line to transfer control unit.
 Steering angle sensor signal
ECM Transmits the following signals via CAN communication line to transfer control unit.
 Accelerator pedal position signal
 Engine speed signal
 Engine torque signal
TCM Transmits the following signals via CAN communication line to transfer control unit.
 Shift position signal
 Gear position signal
 Output shaft revolution signal
Revision: 2010 May2011 QX56

DLN-18
< SYSTEM DESCRIPTION >[TRANSFER: ATX90A]
SYSTEM
SYSTEM
4WD SYSTEM
4WD SYSTEM : System DescriptionINFOID:0000000006222224
 In AUTO mode, distribution of traction force is cont
rolled from 2WD status (0:100) to 4WD status (50:50)
according to signal from each sensor and switch.
 In accordance with fail-safe function, when system is malfunctioning, 4WD warning lamp on combination meter turns ON and 4WD control stops. For fail-safe function, refer to DLN-20, "
4WD SYSTEM : Fail-Safe".
 When a high load status continues for transfer assembly (transfer control actuator or transfer fluid), 4WD
control temporarily becomes 4H or 2WD status, according to protection function.
NOTE:
4WD system is not malfunctioning.
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL
It transmits/receives each signal from the followi ng transfer control unit via CAN communication line.
JPDIE0272GB
Component parts Control signal
ABS actuator and electric unit (control unit) Transmits the following signals via CAN communication line to transfer control unit.
 Vehicle spee
d signal (ABS)
 Stop lamp switch signal (brake signal)
 ABS operation signal
 VDC operation signal
 TCS operation signal
ECM Transmits the following signals via CAN communication line to transfer control unit.
 Accelerator pedal position signal
 Engine speed signal
 Engine torque signal
Revision: 2010 May2011 QX56

DLN-22
< SYSTEM DESCRIPTION >[TRANSFER: ATX90A]
DIAGNOSIS SYSTEM (T
RANSFER CONTROL UNIT)
ABS OPER [On/Off] X ABS operation status via CAN communication
line is displayed.
SAND MODE IND [On/Off] This indicator is not equipped, but it is dis-
played.
ROCK MODE IND [On/Off] This indicator is not equipped, but it is dis-
played.
SNOW MODE IND [On/Off] This indicator is not equipped, but it is dis-
played.
ONROAD MODE IND [On/Off] This indicator is not equipped, but it is dis-
played.
SAND MODE SW [On/Off] X This switch is not equipped, but it is displayed.
ROCK MODE SW [On/Off] X This switch is not equipped, but it is displayed.
SNOW MODE SW [On/Off] X This switch is not equipped, but it is displayed.
ONROAD MODE SW [On/Off] X This switch is not equipped, but it is displayed.
HI/LO POSI SEN 3 [On/Off] X Transfer Hi-Lo position sensor (3) status is dis-
played.
HI/LO POSI SEN 1 [On/Off] X Transfer Hi-Lo position sensor (1) status is dis-
played.
LOCK POSI SEN [OPEN/LOCK/BAT/UNLEAN/HI
TEMP/ERROR/GND] X
Transfer lock position sensor signal is dis-
played.
ATP IND [On/Off] Control status of ATP warning lamp is dis-
played.
4WD FAILLAMP [On/Off] X Control status of ATP warning lamp is dis-
played.
4WD MODE IND [4L/LOCK/AUTO] X Control status of 4WD mode indicator lamp is
displayed.
(LOCK means 4H of 4WD mode)
MOTOR DRIVE B [HI/LO/PWM] X Driving status of transfer motor is displayed.
(Reverse side)
MOTOR DRIVE A [HI/LO/PWM] X Driving status of transfer motor is displayed.
(Drive side)
FLUID TEMP SEN [V] X Temperature of transfer fluid is displayed.
MOTOR TEMP [V] X Temperature of transfer motor is displayed.
C/U POWER SUP [V] X Power supply voltage value of transfer control
unit is displayed.
MOTOR POWER SUP [V] X Power supply voltage value of transfer motor
unit is displayed.
ROTARY POSI SEN [%] X Transfer rotary position sensor signal is dis-
played.
THRTL POSI SEN [%] X X Throttle opening status via CAN communica-
tion line is displayed.
AT R SPEED [km/h] X Output shaft revolution speed via CAN commu-
nication line is displayed.
T/M GEAR [0 - 7] X Current transmission gear via CAN communi-
cation line is displayed.
COMPR VHCL SPEED [km/h] X Vehicle speed calculated by transfer control
unit is displayed.
VHCL/S SEN-FR [km/h] X Wheel speed (front) average calculated by
transfer control.
Monitor item (Unit)
SELECT MONITOR ITEM
Remarks
ECU INPUT
SIGNALS MAIN SIG-
NALS
Revision: 2010 May2011 QX56