2009 INFINITI QX56 door lock

DLK-154
< ECU DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BCM (BODY CONTROL MODULE)
Wiring Diagram — POWER DOOR LOCK SYSTEM —
INFOID:0000000003775822
ABKWA0019GB
Revision: December 20092009 QX56

INTELLIGENT KEY UNITDLK-171
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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N
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INTELLIGENT KEY UNIT
Reference Value - Intelligent Key UnitINFOID:0000000003775826
TERMINAL LAYOUT
PHYSICAL VALUES
WIIA1168E
Te r m i n a lWire
Color Item Condition
Voltage (V)Approx.
Ignition
Switch Po- sition Operation or Conditions
1L/Y Steering lock sole-
noid power supply LOCK
— 5
2 L CAN-H —— —
3 P CAN-L —— —
4GR Intelligent Key warn-
ing buzzer (front of
vehicle) LOCK
Operate door request
switch. Buzzer OFF
Battery voltage
Buzzer ON 0
5B/W Front door request
switch LH —Press front door request switch LH.
0
Other than above Battery voltage
6 G/R Ignition switch (ON) ON —Battery voltage
7 B/R Key switch LOCKInsert mechanical key into ignition key
cylinder.
Battery voltage
Remove mechanical key from ignition
key cylinder. 0
8G Remote keyless en-
try receiver ground
—— 0
9GR Remote keyless en-
try receiver signal —When remote keyless entry receiver re-
ceives signal from keyfob.
Stand-by
11 Y Power source (Fuse) — —Battery voltage
12 B Ground —— 0
OCC3879D
Revision: December 20092009 QX56

DLK-172
< ECU DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY UNIT
13 B/WInside key antenna 3
(front of center con-
sole) (+) signal
LOCK Any door open → all doors closed
14 W/G Inside key antenna 3
(front of center con-
sole) (-) signal
15 G Inside key antenna 1
(rear of center con-
sole) (+) signal
LOCK Any door open → all doors closed
16 L Inside key antenna 1
(rear of center con-
sole) (-) signal
17 W/L Rear bumper anten-
na (+) signal
LOCK Lift back door handle (close switch).
18 W/R Rear bumper anten-
na (-) signal
19 P Front outside anten-
na LH (+) signal
LOCK Press front door request switch LH.
20 V Front outside anten-
na LH (-) signal
21 B/W Remote keyless en-
try receiver RSSI sig-
nal ——
23 L/W Power back door out-
put —Power liftgate switch ON.
0
Power liftgate switch OFF. Battery voltage
25 P/L Front door request
switch RH —Press front door request switch RH.
0
Other than above Battery voltage
27 R/B Ignition knob switch — Press ignition switch.
Battery voltage
Return ignition switch to LOCK position. 0
28 R Unlock sensor
(driver side) —Door (driver si
de) is locked. 5
Door (driver side ) is unlocked. 0
29 LG/W Back door open
switch input —Back door handle switch ON.
0
Back door handle switch OFF. Battery voltage
Te r m i n a l
Wire
Color Item Condition
Voltage (V)Approx.
Ignition
Switch Po-
sition Operation or Conditions
PIIB7441E
PIIB7441E
SIIA1910J
SIIA1910J
PIIA2344E
Revision: December 20092009 QX56

INTELLIGENT KEY UNITDLK-173
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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30 G/B Remote keyless en-
try receiver power
supply
—— 5
32 L/O Steering lock sole-
noid communication
signal LOCKWhen Intelligent Key is inside vehicle,
press ignition knob switch.
Other than above
5
33 W Inside key antenna 4
(overhead console
area) (+) signal
LOCKPress ignition knob switch: ON (Ignition
knob switch)
34 BR Inside key antenna 4
(overhead console
area) (-) signal
35 O Inside key antenna 2
(luggage compart-
ment) (+) signal
LOCK Back door open → all doors closed
36 R Inside key antenna 2
(luggage compart-
ment) (-) signal
37 LG Front outside anten-
na (+) signal RH
LOCK Press front door request switch RH.
38 B/Y Front outside anten-
na (-) signal RH
39 L/R P range switch —Selector lever is in “P” position.
0
Other than above Battery voltage
40 V AS select unlock out-
put
—UNLOCK with rear door locks disabled.
0
Other than above Battery voltage
Te r m i n a l
Wire
Color Item Condition
Voltage (V)Approx.
Ignition
Switch Po-
sition Operation or Conditions
SIIA1911J
PIIB7441E
PIIB7441E
SIIA1910J
Revision: December 20092009 QX56

DLK-206
< SYMPTOM DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
INTELLIGENT KEY SYSTEM SYMPTOMS
Symptom TableINFOID:0000000003775833
ALL FUNCTIONS OF INTELLIGENT KEY SYSTEM DO NOT OPERATE
NOTE:
• Before performing the diagnosis in the following table, check “WORK FLOW”. Refer to
DLK-6, "
Work Flow".
• Check that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following symptoms are detected, check syst ems shown in the “Diagnosis/service procedure” column
in this order.
Conditions of Vehicle (Operating Conditions)
• “ENGINE START BY I-KEY” and “LOCK/UNLOCK BY I-KEY” are ON when se tting on CONSULT-III.
• All doors are closed.
Symptom Diagnosis/service procedureReference page
All doors and ignition switch do not respond to
Intelligent Key command. 1. Check Intelligent Key function and battery inspection.
DLK-106
2. Check Intelligent Key unit power supply and ground circuit. DLK-68
3. Check remote keyless entry receiver.DLK-103
4. Check BCM power supply and ground circuit. DLK-68
5. Replace Intelligent Key unit.DLK-106
Revision: December 20092009 QX56

DOOR LOCK FUNCTION SYMPTOMSDLK-207
< SYMPTOM DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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DOOR LOCK FUNCTION SYMPTOMS
DOOR LOCK AND UNLOCK SWITCH
DOOR LOCK AND UNLOCK SWITCH : Symptom TableINFOID:0000000003775834
DOOR LOCK/UNLOCK FUNCTION MALFUNCTION
NOTE:
• Before performing the diagnosis in the follo wing table, check “WORK FLOW”. Refer to DLK-6, "
Work Flow".
• Check that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following symptoms are detec ted, check systems shown in the “Diagnosis/service procedure” column
in this order.
Conditions of Vehicle (Operating Conditions)
• “LOCK/UNLOCK BY I-KEY” is ON when setting on CONSULT-III.
• Ignition switch is not depressed.
• All doors are closed.
Symptom Diagnosis/service procedureReference page
Power door lock does not operate with door lock
and unlock switch. 1. Check BCM Power supply and ground circuit.
BCS-32
2. Check door lock and unlock switch. DLK-74
3. Check door lock actuator (driver side)DLK-86
4. Check Intermittent Incident. GI-38
Power door lock does not operate with door key
cylinder operation.
(Power door lock operate properly with door lock
and unlock switch.)1. Check key cylinder switch.
DLK-79
2. Replace power window main switch.PWC-117
Specific door lock actuator does not operate.1a. Check driver side door lock actuator.
DLK-86
1b. Check passenger side door lock actuator.DLK-87
1c. Check rear LH side door lock actuator.DLK-88
1d. Check rear RH side door lock actuator.DLK-90
1e. Check back door lock operation (refer to back door).DLK-210
1f. Check glass hatch lock actuator. DLK-92
2. Check Intermittent Incident. GI-38
Door lock/unlock do not operate by request switch.1. Door switch check.
DLK-712. Ignition knob switch check.DLK-116
3. Replace Intelligent Key unit.SEC-111
Door lock/unlock does not operate by request
switch (LH side).1. Front door request switch LH check.
DLK-832. Front outside antenna LH check.DLK-97
3. Replace Intelligent Key unit.SEC-111
Door lock/unlock does not operate by request
switch (RH side).1. Front door request switch RH check.
DLK-832. Front outside antenna RH check.DLK-97
3. Replace Intelligent Key unit.SEC-111
Selective unlock function does not operate by front
door request switch LH (other door lock functions
operate properly).1.
Check “SELECT UNLOCK FUNCTION” setting in “WORK
SUPPORT”.
DLK-56
2. Replace Intelligent Key unit.
SEC-111
Revision: December 20092009 QX56

DLK-208
< SYMPTOM DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR LOCK FUNCTION SYMPTOMS
INTELLIGENT KEY
INTELLIGENT KEY : Symptom TableINFOID:0000000003775835
REMOTE KEYLESS ENTRY FUNCTION MALFUNCTION
NOTE:
• Before performing the diagnosis in the following table, check “Trouble Diagnosis Procedure”. Refer to
DLK-
6, "Work Flow".
• Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following “symptoms” are detected, check syst ems shown in the “Diagnosis/service procedure” column
in this order.
Conditions of Vehicle (Operating Conditions)
• Ignition switch is not depressed.
• All doors are closed.
Auto lock function does not operate properly. 1.
Check “AUTO RELOCK TIMER” setting in “WORK SUP-
PORT”. DLK-52
2. Key switch check (BCM).
DLK-115
3. Ignition knob switch check.DLK-116
4. Door switch check. DLK-71
5. Replace Intelligent Key unit.SEC-111
Key reminder function does not operate properly.1.
Check “ANTI KEY LOCK IN FUNCTION” setting in
“WORK SUPPORT”.
DLK-52
2. Door switch check.
DLK-71
3a. Inside key antenna 1 (rear of center console) check. DLK-60
3b. Inside key antenna 2 (luggage compartment) check.DLK-62
3c. Inside key antenna 3 (front of center console) check.DLK-64
3d. Inside key antenna 4 (overhead console area) check. DLK-66
4. Front door lock actuator LH (door unlock sensor) check.DLK-81
5. Intelligent Key battery and function inspection.DLK-106
6. Replace Intelligent Key unit. SEC-111
Vehicle speed sensing auto LOCK operation does
not operate.1.
Ensure automatic door lock/unlock function (lock opera-
tion) is enabled. DLK-56
2. Check combination meter vehicle speed signal.
MWI-29
3. Check intermittent incident. GI-38
Ignition OFF interlock door UNLOCK function does
not operate.1.
Ensure automatic door lock/unlock function (unlock oper-
ation) is enabled. DLK-56
2. Check BCM for DTC.
BCS-51
3. Check intermittent incident. GI-38
SymptomDiagnosis/service procedureReference page
Symptom Diagnosis/service procedureReference
page
All of the remote keyless entry functions do not
operate. 1. Intelligent Key battery and function inspection.
DLK-106
2. Remote Keyless Entry function check.DLK-103
3. Replace Intelligent Key unit. SEC-111
Selective unlock function does not operate by In-
telligent Key remote control button.1.
Check “SELECT UNLOCK FUNCTION” setting in “WORK SUP-
PORT”.
DLK-56
2. Intelligent Key battery inspection.
DLK-106
3. Replace Intelligent Key unit. SEC-111
Revision: December 20092009 QX56

DOOR LOCK FUNCTION SYMPTOMSDLK-209
< SYMPTOM DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
C
D
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F
G H
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M A
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DLK
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O P
Auto lock function does not operate properly. 1. Check “AUTO RELOCK TIMER” setting in “WORK SUPPORT”.
DLK-56
2. Key switch check (BCM).DLK-115
3. Ignition knob switch check.DLK-116
4. Door switch check. DLK-71
5. Replace Intelligent Key unit.SEC-111
Key reminder function does not operate properly.1.
Check “ANTI KEY LOCK IN FUNCTION” setting in “WORK
SUPPORT”.
DLK-56
2. Door switch check.
DLK-71
3a. Inside key antenna 1 (rear of center console) check.DLK-60
3b. Inside key antenna 2 (luggage compartment) check.DLK-62
3c. Inside key antenna 3 (front of center console) check.DLK-64
3d. Inside key antenna 4 (overhead console area) check.DLK-66
4. Front door lock actuator LH (door unlock sensor) check.DLK-81
5. Intelligent Key battery inspection.DLK-106
6. Replace Intelligent Key unit. SEC-111
Panic alarm function does not operate properly.1. Check “PANIC ALARM DELAY” setting in “WORK SUPPORT”.
DLK-56
2. Theft warning operation check.DLK-212
3. Intelligent Key battery inspection.DLK-106
4. Key switch check (BCM). DLK-115
5. Ignition knob switch check.DLK-116
6. Replace Intelligent Key unit.SEC-111
Back door open function does not operate prop-
erly.1. Back door diagnosis.
DLK-1232. Intelligent Key battery inspection.DLK-106
3. Replace Intelligent Key unit. SEC-111
Power window down function does not operate.1. Check “PW DOWN SET” setti
ng in “WORK SUPPORT”. DLK-562. Intelligent Key battery inspection. DLK-106
SymptomDiagnosis/service procedureReference
page
Revision: December 20092009 QX56