Infiniti QX56 (Z62). Manual — part 412
DLK-114
< DTC/CIRCUIT DIAGNOSIS >
B2628 OUTSIDE ANTENNA
B2628 OUTSIDE ANTENNA
DTC Logic
INFOID:0000000006225918
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON.
2.
Check “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES
>> Refer to
DLK-108, "Diagnosis Procedure"
.
NO
>> Outside key antenna (back door) is OK.
Diagnosis Procedure
INFOID:0000000006225919
1.
CHECK OUTSIDE 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 OUTSIDE KEY ANTENNA CIRCUIT
1.
Disconnect BCM connector and outside key antenna (back door) connector.
2.
Check continuity between BCM harness connector and outside key antenna (back door) harness connec-
tor.
DTC
CONSULT-III display
description
DTC detecting condition
Possible cause
B2628
OUTSIDE ANTENNA
An excessive high or low voltage from outside key
antenna (back door) is sent to BCM
• Outside key antenna (back door)
• Between BCM – Outside key an-
tenna (back door)
(+)
(–)
Condition
Signal
(Reference value)
BCM
Connector
Terminal
Back door
M71
82, 83
Ground
When Intelligent Key is in the
antenna detection area
When Intelligent Key is not in
the antenna detection area
JMKIA3839GB
JMKIA3838GB
B2628 OUTSIDE ANTENNA
DLK-115
< DTC/CIRCUIT DIAGNOSIS >
C
D
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F
G
H
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M
A
B
DLK
N
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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 (back door). (New antenna or other antenna)
2.
Connect BCM and outside key antenna (back door) connector.
3.
Check signal between BCM harness connector and ground using oscilloscope.
Is the inspection result normal?
YES
>> Replace outside key antenna (back door).
NO
>> Replace BCM. Refer to
BCS-81, "Removal and Installation"
BCM
Outside key antenna (back door)
Continuity
Connector
Terminal
Connector
Terminal
M71
82
D153
1
Existed
83
2
BCM
Ground
Continuity
Connector
Terminal
M71
82
Not existed
83
(+)
(–)
Condition
Signal
(Reference value)
BCM
Connector
Terminal
Back door
M71
82, 83
Ground
When Intelligent Key is in the
antenna detection area
When Intelligent Key is not in
the antenna detection area
JMKIA3839GB
JMKIA3838GB
DLK-116
< DTC/CIRCUIT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
AUTOMATIC BACK DOOR CONTROL UNIT
AUTOMATIC BACK DOOR CONTROL UNIT : Diagnosis Procedure
INFOID:0000000006225920
1.
CHECK FUSE, FUSIBLE LINK AND CIRCUIT BREAKER
Check that the following fuse, fusible link and circuit breaker are not fusing.
Is the fuse fusing?
YES
>> Replace the blown fuse or fusible link after repairing the affected circuit if a fuse or fusible link is
blown.
NO
>> GO TO 2.
2.
CHECK POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect automatic back door control module connector.
3.
Check voltage between automatic back door control module harness connector and ground.
Is the measurement value normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness.
3.
CHECK GROUND CIRCUIT
Check continuity between automatic back door control module harness connector and ground.
Does continuity exist?
YES
>> INSPECTION END
NO
>> Repair or replace harness.
Fuse and fusible link No.
Signal name
T (30A)
Battery power supply
9 (10A)
4 (10A)
Ignition power supply
(+)
(
−
)
Condition
Voltage
(Approx.)
Automatic back door control module
Connector
Terminal
B26
9
Ground
Ignition switch
ON
Battery voltage
10
—
28
Automatic back door control module
Ground
Continuity
Connector
Terminal
B26
34
Existed
DOOR SWITCH
DLK-117
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
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M
A
B
DLK
N
O
P
DOOR SWITCH
Component Function Check
INFOID:0000000006225921
1.
CHECK FUNCTION
1.
Select “DOOR LOCK” of “BCM” using CONSULT-III.
2.
Select “DOOR SW-DR”, “DOOR SW-AS”, “DOOR SW-RL”, “DOOR SW-RR”, in “DATA MONITOR” mode.
3.
Check that the function operates normally according to the following conditions.
Is the inspection result normal?
YES
>> Door switch is OK.
NO
>> Refer to
DLK-117, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000006225922
1.
CHECK DOOR SWITCH INPUT SIGNAL
1.
Turn ignition switch OFF.
2.
Disconnect malfunctioning door switch connector.
3.
Check signal between malfunctioning door switch harness connector and ground using oscilloscope.
Monitor item
Condition
Status
DOOR SW-DR
Driver side door
Open
On
Closed
Off
DOOR SW-AS
Passenger side door
Open
On
Closed
Off
DOOR SW-RL
Rear door LH
Open
On
Closed
Off
DOOR SW-RR
Rear door RH
Open
On
Closed
Off
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