2008 INFINITI QX56 ignition

BACK DOOR CONTROL UNITDLK-187
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
C
D
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G H
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M A
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DLK
N
O P
BACK DOOR CONTROL UNIT
Reference ValueINFOID:0000000001539061
TERMINAL LAYOUT
PHYSICAL VALUES
LIIA2444E
Te r m i n a l Wire Col-
or Item
Condition Voltage (V)
(Approx.)
1 B Ground ——
2 B Ground ——
3 Y/R Battery power supply —Battery voltage
4 G Hazard lamp output Request to flash hazardsPulse must be >50ms
but less than 250ms
5 B/P Pinch strip ground ——
6 R Warning chime output Back door motor activeBattery voltage
7 G/R Ignition switch Ignition switch ON
Battery voltage
Ignition switch OFF 0
8 GR/B Back door close switch Close position ON
0
Neutral position OFF Battery voltage
9 L Warning chime ground ——
10 L/B Battery power —Battery voltage
11 Y Cinch latch motor
CLOSE output Back door close operation
Battery voltage
12 L Closure motor
RETURN output Back door release operation
Battery voltage
13 P/L Back door close switch Cancel position
0
Neutral position 5
14 P Close switch signal While fully opening back door
PIIA3278E
WIIA1047E
Revision: March 2010 2008 QX56

DLK-188
< ECU DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR CONTROL UNIT
15 O/L Open switch signal
While fully closing back door
17 GR Glass hatch ajar signal Glass hatch OPEN
0
Glass hatch CLOSED 5
18 GR/R Park switch P or N position (Ignition is ON)
0
Other (Ignition is ON) 9
19 BR/B Pinch strip RH Detecting obstruction
0
Other 5
20 GR Pinch strip LH Detecting obstruction
0
Other 5
21 W/V Power window serial link —
22 BR Half switch signal Back door half latch position
23 L/W Power liftgate switch ON
0
OFF Battery voltage
26 V Outside handle signal Back door handle switch (at rest)
Battery voltage
Back door handle switch (open) 0
Te r m i n a l
Wire Col-
or Item
Condition Voltage (V)
(Approx.)
WIIA1047E
PIIA2344E
PIIA2169E
Revision: March 2010 2008 QX56

DLK-200
< SYMPTOM DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
INTELLIGENT KEY SYSTEM SYMPTOMS
Symptom TableINFOID:0000000001539065
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-102
2. Check Intelligent Key unit power supply and ground circuit. DLK-64
3. Check remote keyless entry receiver.DLK-99
4. Check BCM power supply and ground circuit.DLK-64
5. Replace Intelligent Key unit.DLK-102
Revision: March 2010 2008 QX56

DOOR LOCK FUNCTION SYMPTOMSDLK-201
< SYMPTOM DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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M A
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DLK
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DOOR LOCK FUNCTION SYMPTOMS
DOOR LOCK AND UNLOCK SWITCH
DOOR LOCK AND UNLOCK SWITCH : Symptom TableINFOID:0000000001539066
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-70
3. Check door lock actuator (driver side)DLK-82
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-75
2. Replace power window main switch.PWC-115
Specific door lock actuator does not operate.1a. Check driver side door lock actuator.
DLK-82
1b. Check passenger side door lock actuator.DLK-83
1c. Check rear LH side door lock actuator.DLK-84
1d. Check rear RH side door lock actuator.DLK-86
1e. Check back door lock operation (refer to back door).DLK-204
1f. Check glass hatch lock actuator. DLK-88
2. Check Intermittent Incident. GI-38
Door lock/unlock do not operate by request switch.1. Door switch check.
DLK-672. Ignition knob switch check.DLK-112
3. Replace Intelligent Key unit.SEC-116
Door lock/unlock does not operate by request
switch (LH side).1. Front door request switch LH check.
DLK-792. Front outside antenna LH check.DLK-93
3. Replace Intelligent Key unit.SEC-116
Door lock/unlock does not operate by request
switch (RH side).1. Front door request switch RH check.
DLK-792. Front outside antenna RH check.DLK-93
3. Replace Intelligent Key unit.SEC-116
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-51
2. Replace Intelligent Key unit.
SEC-116
Revision: March 2010 2008 QX56

DLK-202
< SYMPTOM DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR LOCK FUNCTION SYMPTOMS
INTELLIGENT KEY
INTELLIGENT KEY : Symptom TableINFOID:0000000001539067
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-48
2. Key switch check (BCM).
D L K - 111
3. Ignition knob switch check.DLK-112
4. Door switch check. DLK-67
5. Replace Intelligent Key unit.SEC-116
Key reminder function does not operate properly.1.
Check “ANTI KEY LOCK IN FUNCTION” setting in
“WORK SUPPORT”.
DLK-48
2. Door switch check.
DLK-67
3a. Inside key antenna 1 (rear of center console) check. DLK-56
3b. Inside key antenna 2 (luggage compartment) check.DLK-58
3c. Inside key antenna 3 (front of center console) check.DLK-60
3d. Inside key antenna 4 (overhead console area) check. DLK-62
4. Front door lock actuator LH (door unlock sensor) check.DLK-77
5. Intelligent Key battery and function inspection.DLK-102
6. Replace Intelligent Key unit.SEC-116
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-102
2. Remote Keyless Entry function check. DLK-99
3. Replace Intelligent Key unit.SEC-116
Selective unlock function does not operate by In-
telligent Key remote control button.1.
Check “SELECT UNLOCK FUNCTION” setting in “WORK SUP-
PORT”. DLK-48
2. Intelligent Key battery inspection.
DLK-102
3. Replace Intelligent Key unit.SEC-116
Auto lock function does not operate properly.1. Check “AUTO RELOCK TIMER” setting in “WORK SUPPORT”.
DLK-48
2. Key switch check (BCM).D L K - 111
3. Ignition knob switch check.DLK-112
4. Door switch check. DLK-67
5. Replace Intelligent Key unit.SEC-116
Revision: March 2010 2008 QX56

DOOR LOCK FUNCTION SYMPTOMSDLK-203
< SYMPTOM DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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DLK
N
O P
Key reminder function does not operate properly. 1.
Check “ANTI KEY LOCK IN FUNCTION” setting in “WORK
SUPPORT”.
DLK-48
2. Door switch check.
DLK-67
3a. Inside key antenna 1 (rear of center console) check.DLK-56
3b. Inside key antenna 2 (luggage compartment) check.DLK-58
3c. Inside key antenna 3 (front of center console) check.DLK-60
3d. Inside key antenna 4 (overhead console area) check.DLK-62
4. Front door lock actuator LH (door unlock sensor) check.DLK-77
5. Intelligent Key battery inspection.DLK-102
6. Replace Intelligent Key unit.SEC-116
Panic alarm function does not operate properly.1. Check “PANIC ALARM DELAY” setting in “WORK SUPPORT”.
DLK-49
2. Theft warning operation check.DLK-206
3. Intelligent Key battery inspection.DLK-102
4. Key switch check (BCM). D L K - 111
5. Ignition knob switch check.DLK-112
6. Replace Intelligent Key unit.SEC-116
Back door open function does not operate prop-
erly.1. Back door diagnosis.
DLK-1192. Intelligent Key battery inspection.DLK-102
3. Replace Intelligent Key unit.SEC-116
Power window down function does not operate.1. Check “PW DOWN SET” setti
ng in “WORK SUPPORT”. DLK-492. Intelligent Key battery inspection. DLK-102
SymptomDiagnosis/service procedureReference
page
Revision: March 2010 2008 QX56

BACK DOOR OPENER FUNCTIONDLK-205
< SYMPTOM DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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M A
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DLK
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BACK DOOR SWITCH : Symptom TableINFOID:0000000001539069
BACK DOOR OPEN 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 detected, check syst ems shown in the “Diagnosis/service procedure” column
in this order.
Conditions of Vehicle (Operating Conditions)
• Vehicle is in park.
INTELLIGENT KEY
INTELLIGENT KEY : Symptom TableINFOID:0000000001539070
BACK DOOR OPEN 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 detected, check systems shown in the “Diagnosis/service procedure” column
in this order.
Conditions of Vehicle (Operating Conditions)
• Ignition switch is not depressed.
Symptom Diagnosis/service procedureReference page
Back door open function does not operate by
back door switch (doors unlocked). 1. Refer to diagnosis chart.
DLK-204
2. Check Intermittent Incident. GI-38
Back door open function does not operate by
back door switch only.
(doors locked but Intelligent Key present).1. Outside key antenna check.
DLK-932. Intelligent Key unit power back door input signal.DLK-136
3. Intelligent Key unit power back door output signal.DLK-137
4. Intelligent Key battery and function check.DLK-102
SymptomDiagnosis/service procedureReference page
Back door open function does not operate
by Intelligent Key. 1. Check Intelligent Key battery inspection.
DLK-102
2. Intelligent Key unit power and ground check. DLK-64
3. Check intermittent incident. GI-38
Revision: March 2010 2008 QX56

DLK-206
< SYMPTOM DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
WARNING FUNCTION SYMPTOMS
WARNING FUNCTION SYMPTOMS
Symptom TableINFOID:0000000001539071
WARNING FUNCTION MALFUNCTION
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 systems shown in the “Diagnosis/service procedure” column
in this order.
Conditions of Vehicle (Operating Conditions)
Warning chime functions operating condition is extremely complicated, during operating confirmations, recon-
firm the list above twice in order to ensure proper operation.
Symptom Diagnosis/service procedure Reference
page
OFF position warn-
ing does not oper-
ate. For internal
1. Check ignition knob switch.
DLK-112
2. Check door switch. DLK-67
3. Check warning chime function.DLK-107
4. Check Intermittent Incident. GI-38
For external1. Check ignition knob switch.
DLK-1122. Check door switch. DLK-67
3. Check Intelligent Key warning buzzer.DLK-91
4. Check Intermittent Incident. GI-38
P position warning does not operate.1. Check Park position switch.
TM-43
2. Check door switch.DLK-67
3. Check Intelligent Key warning buzzer.DLK-91
4. Check warning chime function.DLK-107
5. Check combination meter display function.DLK-106
6. Check Intermittent Incident. GI-38
ACC warning does not operate1. Check ignition knob switch.
DLK-1122. Check warning chime function.DLK-107
3. Check combination meter display function.DLK-106
4. Check Intermittent Incident. GI-38
Revision: March 2010 2008 QX56