2011 INFINITI QX56 clutch

COMPONENT PARTSDLK-15
< SYSTEM DESCRIPTION >
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AUTOMATIC BACK DOOR SYST EM : Component DescriptionINFOID:0000000006225836
7. Touch sensor LH 8. Back door request switch 9. Back door lock assembly
10. Back door opener switch 11. Automatic back door close switch 12. Automatic back door warning buzzer
13. Touch sensor RH
A. View with luggage side finisher up-
per removed B. View with back door finisher inner re-
moved
Item Function
Automatic back door control mod-
ule Automatic back door control unit, encoder, automatic back door motor and clutch are in-
stalled
 Automatic back door control unit: Controls the automatic back door system
 Encoder: Automatic back door control unit receives the pulse signals from encoders A
and B that occurred due to synchronization with the back door operation. The automatic
back door control unit calculates the back door position, operation direction, and opera-
tion speed according to the received pulse signals.
 Automatic back door motor: Inputs open/close signal from automatic back door control
unit and activates the automatic back door open/close operation.
 Clutch: Performs the duty control of the power supply to control the operation speed of the back door.
BCM Transmits and receives signals to the automatic back door control module
ABS actuator and electric unit Transmits vehi cle speed signal to CAN communication line
Combination meter Transmits vehicle speed signal to CAN communication line
Automatic back door warning buzz-
er Warns the user of the automatic back door condition and inappropriate operations with the
buzzer sounds
Touch sensor LH/RH During back door close operation, the touch sensor detects any trapped foreign material
Back door opener switch Detects if back door opener switch is press/release
Back door request switch Detects if back door request switch is press/release
Automatic back door switch Detects if automatic back door switch is press/release
Automatic back door main switch Detects if automatic back door main switch is press/release
Automatic back door close switch Detects if automatic back door close switch is press/release
Back door lock assembly Back door closure motor, half latch switch, open switch, close switch and back door switch
are installed
 Closure motor: Inputs open/close signal from automatic back door control unit and acti-
vates the back door auto closure operation
 Half latch switch: Starts the closure motor close operation
 Open switch: Stops the closure motor open operation
 Close switch: Stops the closure motor close operation
 Back door switch: Inputs back door open/ close condition to BCM
Revision: 2010 May2011 QX56

SYSTEM (AUTOMATIC BACK DOOR SYSTEM)
DLK-33
< SYSTEM DESCRIPTION >
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INTERMITTENT CLUTCH FUNCTION
If the main switch is turned to OFF during auto operation, the back door may be closed suddenly because the
operation is interrupted immediately when the operati on cannot be continued because of the detection of a
system malfunction. Therefore, operat e the clutch intermittently to stabilize the back door behavior and ensure
safety.
AUTOMATIC BACK DOOR OPEN/CLOSE OPERATION CONDITION
*: If the registered Intelligent Key is used, the operation can be performed even if the back door is in the LOCK position
CONTROL IF NOT WITHIN THE OPERAT ION CONDITIONS DURING THE OPERATION
If the back door is not within the operation conditions dur ing the operation, the automatic back door control unit
performs the control as follows.
Non-reverse area  Just after starting the mo-
tor operation
 Full range of closure oper- ation
Driving  Back door open operation
 Closure [open (return the latch to the neutral position)]
Switch operation during reverse op-
eration Receive
Number of allowable reverse opera-
tions Perform the intermittent clutch function after 2 reverse operations regardless of the oper-
ation direction
Detection method Encoder pulse Touch sensor
Automatic back door switch Intelligent Key
Automat-
ic back
door close switch Back door opener
switch
Operating direction Fully closed → Open Fully open
→ Closed Fully
closed →
Open Fully open
→ Closed Fully open
→ Closed Fully closed
→ Open
Main switch — — — — ON ON
Ignition position ON ACC/
LOCK ———ON
ACC/
LOCK
Shift selector lever P position — — — — — P position —
Vehicle speed 0 km/h
Back door lock condition — — — — — Unlock*
Touch sensor Normal
Power supply
(Automatic power back
door control unit) Approx. 11 V or more
Item
(Condition) Back door condition
Main Switch (ON → OFF) Motor: OFF
 Clutch: OFF (Intermittent clutch function)
Vehicle stop condition (open operation)
 IGN ON and shift P position →IGN ON and
other than P position
 IGN OFF and shift N position → IGN ON and
N position The operation is continued
Operation condition release during the opera-
tion start announcement condition Automatic back door function does not operate
Revision: 2010 May2011 QX56

DLK-34
< SYSTEM DESCRIPTION >
SYSTEM (AUTOMATIC BACK DOOR SYSTEM)
TIME CHART FOR AUTOMATIC POWER BACK DOOR SYSTEM
Fully Closed to Fully Open Operation
When operating the automatic back door switch, automatic back door opener switch and Intelligent Key in the
fully closed position, the system operates as follows.
Vehicle speed
(0 km/h → More than 0 km/h) Open operation
Operation stop and intermittent clutch function [Back
door fully closed or buzzer sounds until the vehicle
stops (pattern C)]
Close operation The operation is continued [buzzer sounds (pattern C)
until back door fully closed]
Touch sensor
(Normal → Open) Open operation
The operation is continued (If the pinch is detected af-
ter that, the system switches to the intermittent clutch
function)
Close operation Intermittent clutch function
Closure (close) opera-
tion Closure (open) operation and buzzer sounds (pattern
B)
Closure [open (return
the latch to the neutral
position)] The operation is continued
Operation time
(More than approx. 30 sec.) Intermittent clutch function
Back door opener switch
(OFF → ON) Open/close operation The operation is continued
Closure (close) opera-
tion
Closure (open) operation and back door open
Closure [open (return
the latch to the neutral
position)] Back door open
Malfunction detected
(IGN circuit, half latch switch and back door
state) Intermittent clutch function
Item
(Condition) Back door condition
Revision: 2010 May2011 QX56

SYSTEM (AUTOMATIC BACK DOOR SYSTEM)
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< SYSTEM DESCRIPTION >
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1. Operates the buzzer and hazard after the operation enable conditions are established
2. The back door closure motor performs the open operat ion after the buzzer (pattern A) stops sounding
3. Stops the back door closure motor open operation after turning the open switch to ON Then, operate the automatic back door motor and clutch to perform the back door open operation
4. The back door closure motor performs the close operation after turning the half latch switch to ON
5. Stop the back door closure motor close operation and return the latch to the neutral position after turning the close switch to OFF
NOTE:
In the operation of steps 3 and 4, the inputs of half la tch switch, open switch, and close switch may be different
according to the reaction force of the back door weather-strip. Refer to the area encircled by a broken line in
the Time chart (Fully closed to fully open operation)
Fully Open to Fully Closed Operation
When operating the automatic back door switch, automatic back door close switch and Intelligent Key, the
automatic back door system operates as follows.
JMKIA5203GB
Revision: 2010 May2011 QX56

DLK-36
< SYSTEM DESCRIPTION >
SYSTEM (AUTOMATIC BACK DOOR SYSTEM)
1. Operates the buzzer and hazard after the operation enable conditions are established
2. After the buzzer (pattern A) stops sounding, operates the automatic back door motor and clutch to perform
the back door close operation
3. The back door closure motor performs the close operat ion after 300 msec. or more from turning the half
latch switch to OFF
4. The back door closure motor performs the open operation after turning the close switch to ON
5. Stop the back door closure motor open operation and return the latch to the neutral position after turning
the close switch to OFF
JMKIA5204GB
Revision: 2010 May2011 QX56

DLK-42
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (BCM)
SELF-DIAG RESULT
Refer to BCS-57, "DTCIndex".
DATA MONITOR
AUTO LOCK SET Auto door lock operation time can be changed in this mode
 MODE 1: OFF
 MODE 2: 30 sec
 MODE 3: 1 minute
 MODE 4: 2 minutes
 MODE 5: 3 minutes
 MODE 6: 4 minutes
 MODE 7: 5 minutes
HORN WITH KEYLESS LOCK Horn reminder function mode by Intelligent Key button can be selected from the following with
this mode
 On: Operate
 Off: Non-operation
PW DOWN SET Unlock button pressing time on Intelligent Key button can be selected from the following with
this mode
 MODE 1: 3 sec
 MODE 2: Non-operation
 MODE 3: 5 sec
WELCOME LIGHT SELECT Welcome light function mode can be selected from the following with this mode
 Puddle/Outside Handle
 Room lamp
 Head & Tail Lamps (this item is displayed, but cannot be used)
 Heart Beat
WELCOME LIGHT OP SET Welcome light function mode can be changed to operation with this mode
 On: Operate
 Off: Non-operation
Monitor item Description
Monitor Item Condition
REQ SW -DR Indicates [On/Off] condition of door request switch (driver side)
REQ SW -AS Indicates [On/Off] condition of door request switch (passenger side)
REQ SW -BD/TR Indicates [On/Off] condition of back door request switch
PUSH SW Indicates [On/Off] condition of push-button ignition switch
CLUTCH SW NOTE:
This item is displayed, but cannot be monitored
BRAKE SW 1 Indicates [On/Off]* condition of stop lamp switch power supply
BRAKE SW 2 Indicates [On/Off] condition of stop lamp switch
DETE/CANCL SW Indicates [On/Off] condition of P position
SFT PN/N SW Indicates [On/Off] condition of P or N position
S/L -LOCK Indicates [On/Off] condition of steering lock unit (LOCK)
S/L -UNLOCK Indicates [On/Off] condition of steering lock unit (UNLOCK)
S/L RELAY -F/B Indicates [On/Off] condition of steering lock relay
UNLK SEN -DR Indicates [On/Off] condition of driver door UNLOCK status
PUSH SW -IPDM Indicates [On/Off] condition of push-button ignition switch
IGN RLY1 -F/B Indicates [On/Off] condition of ignition relay 1
DETE SW -IPDM Indicates [On/Off] condition of P position
SFT PN -IPDM Indicates [On/Off] condition of P or N position
SFT P -MET Indicates [On/Off] condition of P position
SFT N -MET Indicates [On/Off] condition of N position
ENGINE STATE Indicates [Stop/Stall/Crank/Run] condition of engine states
Revision: 2010 May2011 QX56

AUTOMATIC BACK DOOR CONTROL MODULEDLK-49
< ECU DIAGNOSIS INFORMATION >
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Fail SafeINFOID:0000000006225861
DTC Inspection Priority ChartINFOID:0000000006225862
If some DTCs are displayed at the same time, per form inspections one by one based on the following priority
chart.
16
(LG) Ground
Touch sensor RH sig-
nal Input Touch sensor RH Detect obstruc-
tion
0 V
Other than above 6 V
17
(O) Ground Automatic back door
main switch
InputAutomatic back
door main switch ON Battery voltage
OFF 0 V
19
(L/Y) Ground Close switch signal Input Back door Fully closed 0 V
Open/half latch Battery voltage
20
(G/Y) Ground Open switch signal Input Back door Open 0 V
Half latch/fully
closed
Battery voltage
22
(B) Ground Ground (destination) — — 0 V
23
(B) Ground
Ground (Hazard re-
minder) —— 0 V
28
(R/W) Ground Power supply (BAT) Input — Battery voltage
34
(B) Ground Ground — — 0 V
Te r m i n a l N o .
(Wire color) Description
Condition Vo l ta g e
(Approx.)
(+) (–) Signal name Input/
Output
Display contents of CONSUL T-III Fail-safe Cancellation
B2401 IGN OPEN Intermittent clutch function All following condition are satisfied
 Power supply condition of auto-
matic back door control unit: OFF
 BCM receive ignition position sig- nal (OFF) via CAN
B2403 PULSE ENCODER Inhibit automatic back door operation When receiving the pulse from en-
coders A and B normally (5 pulses)
B2409 HALF LATCH SW Intermittent clutch function Half latch switch is ON from OFF
B2416 TOUCH SEN R OPEN During close operation: Intermittent clutch
function
Normal return
B2417 TOUCH SEN L OPEN During close operation: Intermittent clutch
function Normal return
B2419 OPEN SW Inhibit automatic back door operation Erase DTC, reconnect battery
B2420 CLOSE SW Inhibit automatic back door operation Erase DTC, reconnect battery
B2421 CLUTCH TIME OUT Intermittent clutch function Reception of next operation request
B2422 BACK DOOR STATE Intermittent clutch function Detect back door fully closed posi-
tion
B2423 ABD MTR TIME OUT Intermittent clutch function Reception of next operation request
B2424 CLSR CONDITION Inhibit automatic back door operation Normal return or reconnect battery
Revision: 2010 May2011 QX56

DLK-50
< ECU DIAGNOSIS INFORMATION >
AUTOMATIC BACK DOOR CONTROL MODULE
DTC Index
INFOID:0000000006225863
NOTE: Details of time display
 1 - 39: Displayed if any previous malfunction is present when current condition is normal. It increases like 1
→ 2 → 3...38 → 39 after returning to the normal condition whenever ignition switch OFF → ON. The counter
remains at 39 even if the number of cycles exceeds it . It is counted from 1 again when turning ignition switch
OFF → ON after returning to the normal condition if the malfunction is detected again.
Priority DTC
1  B2425 AUTO BK DR CNT UNIT
 U1000: CAN COMM
 U1010: CONTROL UNIT (CAN)
 B2401 IGN OPEN
2  B2403 PULSE ENCODER
 B2409 HALF LATCH SW
 B2416 TOUCH SEN R OPEN
 B2417 TOUCH SEN L OPEN
 B2419 OPEN SW
 B2420 CLOSE SW
 B2421 CLUTCH TIME OUT
 B2422 BACK DOOR STATE
 B2423 ABD MTR TIME OUT
 B2424 CLSR CONDITION
CONSULT-III display Fail-safe Item Reference page
U1000: CAN COMM — CAN communication circuit DLK-82
U1010: CONTROL UNIT(CAN) — Internal CAN communication circuitDLK-83
B2401: IGN OPEN×IGN power supply circuit DLK-84
B2403: PULSE ENCODER×Encoder signal DLK-85
B2409: HALF LATCH SW×Half latch switch signal DLK-86
B2416: TOUCH SEN R OPEN×Touch sensor RH DLK-88
B2417: TOUCH SEN L OPEN×Touch sensor LH DLK-90
B2419: OPEN SW×Open switch signal DLK-92
B2420: CLOSE SW×Close switch signal DLK-95
B2421: CLUTCH TIME OUT×Clutch operation time DLK-97
B2422: BACK DOOR STATE×Back door state DLK-98
B2423: ABD MTR TIME OUT×Automatic back door motor operation time DLK-99
B2424: CLSR CONDITION×Closure condition DLK-100
B2425: AUTO BCK DR CNT UNIT — Automatic back door control unit DLK-103
Revision: 2010 May2011 QX56