2011 INFINITI QX56 ground

B2421 CLUTCH OPERATION TIMEDLK-97
< DTC/CIRCUIT DIAGNOSIS >
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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 >
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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

DLK-100
< DTC/CIRCUIT DIAGNOSIS >
B2424 CLOSURE CONDITION
B2424 CLOSURE CONDITION
DTC LogicINFOID:0000000006225903
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-100, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225904
1.CHECK OPEN/CLOSE SWITCH SIGNAL
1. Select “AUTOMATIC BACK DOOR CONTROL UNIT” using CONSULT-III.
2. Select “CLOSE SW”, “OPEN SW” in “DATA MONITOR” mode.
3. Check that the function operates normall y according to the following conditions.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 2.
2.CHECK AUTOMATIC BACK DOOR CONTROL MODULE OUTPUT
1. Turn ignition switch OFF.
2. Disconnect back door lock assembly connector.
3. Check voltage between back door lock assembly harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK OPEN/CLOSE SWITCH CIRCUIT
1. Disconnect automatic back door control module connector.
DTC CONSULT-III display de-
scription DTC detecting condition Possible cause
B2424 CLSR CONDITION When the following conditions are detected after
OPEN/CLOSE operation of the back door closure
motor
 Open switch and close switch are ON  Harness or connector
(Open switch or close switch
circuit is open or shorted)
 Back door lock assembly
Monitor item Condition Status
OPEN SW Back doorHalf latch/fully closed OFF
Open ON
CLOSE SW Open/half latch OFF
Fully closed ON
(+)
(–)Vo l ta g e
(Approx.)
Back door lock assembly
Connector Terminal
D157 4
Ground Battery voltage
5
Revision: 2010 May2011 QX56

B2424 CLOSURE CONDITIONDLK-101
< DTC/CIRCUIT DIAGNOSIS >
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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

DLK-104
< DTC/CIRCUIT DIAGNOSIS >
B2621 INSIDE ANTENNA
B2621 INSIDE ANTENNA
DTC LogicINFOID:0000000006225908
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Select “INTELLIGE NT KEY” of “BCM” using CONSULT-III.
2. Select “INSIDE ANT DIAGNOSI S” in “WORK SUPPORT” mode.
3. Perform inside key antenna (“INSIDE ANT DIAG NOSIS”) on “WORK SUPPORT” of “INTELLIGENT
KEY”.
4. Check BCM for DTC.
Is inside key antenna DTC detected?
YES >> Refer to DLK-104, "Diagnosis Procedure".
NO >> Inside key antenna (instrument center) is OK.
Diagnosis ProcedureINFOID:0000000006225909
1.CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1
1. Turn ignition switch OFF.
2. Check signal between BCM harness connector and ground using oscilloscope.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> GO TO 2.
2.CHECK INSIDE KEY ANTENNA CIRCUIT
1. Disconnect BCM connector and inside key antenna (instrument center) connector.
DTCCONSULT-III display
description DTC detecting condition Possible cause
B2621 INSIDE ANTENNA An excessive high or low voltage from inside anten-
na (instrument center) is sent to BCM  Inside key antenna (instrument
center)
 Between BCM ™Inside key anten-
na (instrument center)
(+)
(–) 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

B2621 INSIDE ANTENNADLK-105
< DTC/CIRCUIT DIAGNOSIS >
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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

DLK-106
< DTC/CIRCUIT DIAGNOSIS >
B2622 INSIDE ANTENNA
B2622 INSIDE ANTENNA
DTC LogicINFOID:0000000006225910
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Select “INTELLIGE NT KEY” of “BCM” using CONSULT-III.
2. Select “INSIDE ANT DIAGNOSI S” in “WORK SUPPORT” mode.
3. Perform inside key antenna (“INSIDE ANT DIAG NOSIS”) on “WORK SUPPORT” of “INTELLIGENT
KEY”.
4. Check BCM for DTC.
Is inside key antenna DTC detected?
YES >> Refer to DLK-106, "Diagnosis Procedure".
NO >> Inside key antenna (console) is OK.
Diagnosis ProcedureINFOID:0000000006225911
1.CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1
1. Turn ignition switch OFF.
2. Check signal between BCM harness connector and ground using oscilloscope.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> GO TO 2.
2.CHECK INSIDE KEY ANTENNA CIRCUIT
1. Disconnect BCM connector and inside key antenna (console) connector.
2. Check continuity between BCM harness connector and inside key antenna (console) harness connector.
DTC CONSULT-III display
description DTC detecting condition Possible cause
B2622 INSIDE ANTENNA An excessive high or low voltage from inside anten-
na (console) is sent to BCM  Inside key antenna (console)
 Between BCM
™Inside key anten-
na (console)
(+)
(–) 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

B2622 INSIDE ANTENNADLK-107
< DTC/CIRCUIT DIAGNOSIS >
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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