2011 INFINITI QX56 air condition

DLK-96
< DTC/CIRCUIT DIAGNOSIS >
B2420 CLOSE SWITCH
3. Check continuity between automatic back door control module harness connector and ground.
Is the inspection result normal?
YES >> Replace automatic back door control module. Refer to DLK-262, "Removal and Installation".
NO >> Repair or replace harness.
4.CHECK CLOSE SWITCH GROUND CIRCUIT
Check continuity between back door lock assembly harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace harness.
5.CHECK CLOSE SWITCH
Refer to DLK-95, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace back door lock assembly.
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000006225896
COMPONENT INSPECTION
1.CHECK CLOSE SWITCH
1. Turn ignition switch OFF.
2. Disconnect back door lock assembly.
3. Check continuity between back door lock assembly terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace back door lock assembly.
Automatic back door control module Back door lock assembly Continuity
Connector Terminal Connector Terminal
B26 19 D157 5 Existed
Automatic back door control module GroundContinuity
Connector Terminal
B26 19 Not existed
Back door lock assembly GroundContinuity
Connector Terminal
D157 8 Existed
Back door lock assembly Condition Continuity
Te r m i n a l
5 8 Back door Fully closed Existed
Open/Half latch Not existed
Revision: 2010 May2011 QX56

B2421 CLUTCH OPERATION TIMEDLK-97
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
DLK
N
O P
B2421 CLUTCH OPERATION TIME
DTC LogicINFOID:0000000006225897
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self Diagnostic Result” mode of “AUTOMAT IC BACK DOOR CONTROL UNIT” using CONSULT-
III.
Is DTC detected?
YES >> Refer to DLK-97, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225898
1.CHECK AUTOMATIC BACK DOOR CONTROL MODULE POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check automatic back door control module power supply and ground circuit. Refer to DLK-116, "
AUTOMATIC BACK DOOR CONTROL UNIT : Diagnosis Procedure".
Is the inspection result normal?
YES >> Replace automatic back door control module. Refer to DLK-262, "Removal and Installation".
NO >> Repair or replace the malfunctioning parts.
DTC CONSULT-III display
description DTC detecting condition Possible cause
B2421 CLUTCH TIME OUT When the automatic back door control unit detects
the power distribution to the clutch for 2 minutes or
more  Automatic back door control mod-
ule
 Battery voltage (low voltage)
Revision: 2010 May2011 QX56

B2423 AUTOMATIC BACK DOOR MOTOR OPERATION TIMEDLK-99
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
DLK
N
O P
B2423 AUTOMATIC BACK DOOR MOTOR OPERATION TIME
DTC LogicINFOID:0000000006225901
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self Diagnostic Result” mode of “AUTOMAT IC BACK DOOR CONTROL UNIT” using CONSULT-
III.
Is DTC detected?
YES >> Refer to DLK-99, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225902
1.CHECK AUTOMATIC BACK DOOR CONTROL MODULE POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check automatic back door control module power supply and ground circuit. Refer to DLK-116, "
AUTOMATIC BACK DOOR CONTROL UNIT : Diagnosis Procedure".
Is the inspection result normal?
YES >> Replace automatic back door control module. Refer to DLK-262, "Removal and Installation".
NO >> Repair or replace the malfunctioning parts.
DTC CONSULT-III display de-
scription DTC detecting condition Possible cause
B2423 ABD MTR TIME OUT When the automatic back door control unit and au-
tomatic back door motor operate in the same direc-
tion for 30 seconds or more continuously  Back door mechanism
 Automatic back door control
module
 Battery voltage (low battery)
Revision: 2010 May2011 QX56

B2424 CLOSURE CONDITIONDLK-101
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
DLK
N
O P
2. Check continuity between automatic back door control module harness connector and back door lock
assembly harness connector.
3. Check continuity between automatic back door control module harness connector and ground.
Is the inspection result normal?
YES >> Replace automatic back door control module. Refer to DLK-262, "Removal and Installation".
NO >> Repair or replace harness.
4.CHECK GROUND CIRCUIT
Check continuity between back door lo ck assembly harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace harness.
5.CHECK OPEN/CLOSE SWITCH
Refer to DLK-101, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace back door lock assembly.
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000006225905
COMPONENT INSPECTION
1.CHECK OPEN/CLOSE SWITCH
1. Turn ignition switch OFF.
2. Disconnect back door lock assembly.
3. Check continuity between back door lock assembly terminals.
Automatic back door control module Back door lock assembly Continuity
Connector Terminal Connector Terminal
B26 19
D157 5
Existed
20 4
Automatic back door control module GroundContinuity
Connector Terminal
B26 19
Not existed
20
Back door lock assembly
GroundContinuity
Connector Terminal
D157 8 Existed
Back door lock assembly Condition Continuity
Te r m i n a l
5 8 Back door lock Fully closed Existed
Open/half latch Not existed
4 Open Existed
Fully closed/half latch Not existed
Revision: 2010 May2011 QX56

B2621 INSIDE ANTENNADLK-105
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
DLK
N
O P
2. Check continuity between BCM harness connector and inside key antenna (instrument center) harness
connector.
3. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3.CHECK INSIDE KEY ANTENNA INPUT SIGNAL 2
1. Replace inside key antenna (instrument center). (New antenna or other antenna)
2. Connect BCM connector and inside key antenna (instrument center) connector.
3. Check signal between BCM harness connector and ground using oscilloscope.
Is the inspection result normal?
YES >> Replace inside key antenna (instrument center).
NO >> Replace BCM. Refer to BCS-81, "
Removal and Installation".
BCM Inside key antenna (instrument center)
Continuity
Connector Terminal Connector Terminal
M71 84
M105 1
Existed
85 2
BCM GroundContinuity
Connector Terminal
M71 84
Not existed
85
(+)
(–) Condition Signal
(Reference value)
BCM
Connector Terminal
Instrument center M71 84, 85 Ground When Intelligent Key is in
the antenna detection area
When Intelligent Key is not
in the antenna detection
area
JMKIA3839GB
JMKIA3838GB
Revision: 2010 May2011 QX56

B2622 INSIDE ANTENNADLK-107
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
DLK
N
O P
3. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3.CHECK INSIDE KEY ANTENNA INPUT SIGNAL 2
1. Replace inside key antenna (console). (New antenna or other antenna)
2. Connect BCM connector and inside key antenna (console) connector.
3. Check signal between BCM harness connector and ground using oscilloscope.
Is the inspection result normal?
YES >> Replace inside key antenna (console).
NO >> Replace BCM. Refer to BCS-81, "
Removal and Installation".
BCM Inside key antenna (console)
Continuity
Connector Terminal Connector Terminal
M71 86
M107 1
Existed
87 2
BCM GroundContinuity
Connector Terminal
M71 86
Not existed
87
(+)
(–) Condition Signal
(Reference value)
BCM
Connector Terminal
Console M71 86, 87 Ground When Intelligent Key is in the an-
tenna detection area
When Intelligent Key is not in the
antenna detection area
JMKIA3839GB
JMKIA3838GB
Revision: 2010 May2011 QX56

B2623 INSIDE ANTENNADLK-109
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
DLK
N
O P
3. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3.CHECK INSIDE KEY ANTENNA INPUT SIGNAL 2
1. Replace inside key antenna (luggage room). (New antenna or other antenna)
2. Connect BCM connector and inside key antenna (luggage room) connector.
3. Check signal between BCM harness connector and ground using oscilloscope.
Is the inspection result normal?
YES >> Replace inside key antenna (luggage room).
NO >> Replace BCM. Refer to BCS-81, "
Removal and Installation".
BCM Inside key antenna (luggage room)
Continuity
Connector Terminal Connector Terminal
M71 88
B13 1
Existed
89 2
BCM GroundContinuity
Connector Terminal
M71 88
Not existed
89
(+)
(–) Condition Signal
(Reference value)
BCM
Connector Terminal
Luggage
Room M71 88, 89 Ground When Intelligent Key is in the an-
tenna detection area
When Intelligent Key is not in the
antenna detection area
JMKIA3839GB
JMKIA3838GB
Revision: 2010 May2011 QX56

B2626 OUTSIDE ANTENNADLK-111
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
DLK
N
O P
3. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3.CHECK OUTSIDE KEY ANTENNA INPUT SIGNAL 2
1. Replace outside key antenna (driver side). (New antenna or other antenna)
2. Connect BCM connector and outside key antenna (driver side) connector.
3. Check signal between BCM harness connector and ground using oscilloscope.
Is the inspection result normal?
YES >> Replace outside key antenna (driver side).
NO >> Replace BCM. Refer to BCS-81, "
Removal and Installation".
BCM Outside key antenna (driver side)
Continuity
Connector Terminal Connector Terminal
M71 78
D12 1
Existed
79 2
BCM GroundContinuity
Connector Terminal
M71 78
Not existed
79
(+)
(–) Condition Signal
(Reference value)
BCM
Connector Terminal
Driver side M71 78, 79 Ground When Intelligent Key is in
the antenna detection area
When Intelligent Key is not
in the antenna detection
area
JMKIA3839GB
JMKIA3838GB
Revision: 2010 May2011 QX56