Nissan Murano Z51 (2008 year). Manual - part 97

DLK-84

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2419 OPEN SWITCH

NO

>> Replace back door lock assembly. Refer to 

DLK-361, "DOOR LOCK : Removal and Installation"

.

Revision: 2008 October

2009 Murano

B2420 CLOSE SWITCH

DLK-85

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

B2420 CLOSE SWITCH

Description

INFOID:0000000003430094

The close switch is integrated in the door lock assembly, and it detects the close condition of the back door
lock.

DTC Logic

INFOID:0000000003430095

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON. 

2.

Operate automatic back door 3 times.

3.

Check “Self Diagnostic Result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

DLK-85, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003625827

1.

CHECK CLOSE SWITCH SIGNAL

Check close switch (“CLOSE SW”) in Data Monitor mode.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 2.

2.

CHECK AUTOMATIC BACK DOOR CONTROL UNIT OUTPUT SIGNAL

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 CLOSE SWITCH CIRCUIT

1.

Disconnect automatic back door control unit connector.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2420

CLOSE SWITCH

When the automatic power back door control unit 
detects any of the following conditions
• The change of close switch cannot be detected 

for 3 second or more after starting the closure 
close output for the 3rd time in a row

• Close switch
• Harness or connectors

(Close switch circuit is open or 
shorted)

• Automatic back door control unit

Monitor item

Condition

Status

CLOSE SW

Back door lock

Open/Half latch

OFF

Fully closed

ON

(+)

(–)

Voltage (V)

(Approx.)

Back door lock assembly

Connector

Terminal

D179

5

Ground

Battery voltage

Revision: 2008 October

2009 Murano

DLK-86

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2420 CLOSE SWITCH

2.

Check continuity between automatic back door control unit harness connector and back door lock assem-
bly harness connector.

3.

Check continuity between automatic back door control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace automatic back door control unit. Refer to 

DLK-379, "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-156, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace back door lock assembly. Refer to 

DLK-361, "DOOR LOCK : Removal and Installation"

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000003625828

COMPONENT INSPECTION

1.

CHECK CLOSE SWITCH

Check back door lock assembly (close switch).

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace back door lock assembly. Refer to 

DLK-361, "DOOR LOCK : Removal and Installation"

.

Automatic back door control unit

 Back door lock assembly

Continuity 

 Connector

Terminal

Connector

Terminal

B8

19

D179

5

Existed

Automatic back door control unit

Ground

Continuity 

 Connector

Terminal

B8

19

Not existed

Back door lock assembly 

Ground

Continuity 

Connector

Terminal

D179

8

Existed

Terminal

Condition

Continuity

Back door lock assembly (close switch)

5

8

Back door lock position

Fully closed

Existed

Open/Half latch

Not existed

Revision: 2008 October

2009 Murano

B2421 CLUTCH OPERATION TIME

DLK-87

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

B2421 CLUTCH OPERATION TIME

Description

INFOID:0000000003642237

The clutch operates by the power supplied from the automatic back door control unit. It performs the duty con-
trol of the power supply to control the operation speed of the back door.

DTC Logic

INFOID:0000000003430092

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON. 

2.

Check “Self Diagnostic Result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

DLK-87, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003625829

1.

CHECK AUTOMATIC BACK DOOR CONTROL UNIT OUTPUT

1.

Turn ignition switch OFF.

2.

Disconnect automatic back door control unit connector and automatic back door unit connector.

3.

Check continuity between automatic back door control unit harness connector and automatic back door
unit harness connector. 

4.

Check continuity between automatic back door control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace automatic back door control unit. Refer to 

DLK-379, "Removal and Installation"

.

NO

>> Repair or replace harness.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2421

CLUTCH OPERA-
TION TIME

When the automatic back door control unit detects 
the power distribution to the clutch for 2 minutes or 
more

• Automatic back door control unit
• Harness or connectors

(Clutch circuit is shorted)

• Battery voltage (low voltage)

Automatic back door control unit

Automatic back door unit

Continuity 

Connector

Terminal

 Connector

Terminal

B7

32

B76

9

Existed

33

3

Automatic back door control unit

Ground

Continuity 

 Connector

Terminal

B7

32

Not existed

33

Revision: 2008 October

2009 Murano

DLK-88

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2422 BACK DOOR STATE

B2422 BACK DOOR STATE

Description

INFOID:0000000003430073

The automatic back door control unit counts the pulse signal from the encoder and determines the position of
the back door.

DTC Logic

INFOID:0000000003430074

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON. 

2.

Operate automatic back door.

3.

Check “Self Diagnostic Result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

DLK-88, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003625830

1.

CHECK FUNCTION

Check half latch switch (“HALF LATCH SW”) in Data Monitor mode.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 2.

2.

CHECK AUTOMATIC BACK DOOR CONTROL UNIT 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 HALF LATCH SWITCH CIRCUIT

1.

Disconnect automatic back door control unit connector.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2422

BACK DOOR STATE

When the automatic power back door control unit 
detects a back door position malfunction according 
to the pulse signal

• Back door mechanism
• Automatic back door control unit
• Back door closure

(Door open and half latch switch is 
OFF)

Monitor item

Condition

Status

HALF LATCH SW

Back door lock

Fully closed/Half latch

OFF

Open

ON

(+)

(–)

Voltage (V)

(Approx.)

Back door lock assembly

Connector

Terminal

D179

6

Ground

Battery voltage

Revision: 2008 October

2009 Murano

B2422 BACK DOOR STATE

DLK-89

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

2.

Check continuity between automatic back door control unit harness connector and back door lock assem-
bly harness connector.

3.

Check continuity between automatic back door control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace automatic back door control unit. Refer to 

DLK-379, "Removal and Installation"

.

NO

>> Repair or replace harness.

4.

CHECK HALF LATCH 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 back door lock assembly ground circuit.

5.

CHECK HALF LATCH SWITCH

Refer to 

DLK-89, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace back door lock assembly. Refer to 

DLK-361, "DOOR LOCK : Removal and Installation"

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000003625831

COMPONENT INSPECTION

1.

CHECK HALF LATCH SWITCH

Check back door lock assembly (half latch switch).

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace back door lock assembly. Refer to 

DLK-361, "DOOR LOCK : Removal and Installation"

.

Automatic back door control unit

Back door lock assembly

Continuity 

 Connector

Terminal

 Connector

Terminal

B8

8

D179

6

Existed

Automatic back door control unit

Ground

Continuity 

 Connector

Terminal

B8

8

Not existed

Back door lock assembly

Ground

Continuity 

 Connector

Terminal

D179

8

Existed

Terminal

Back door lock position

Continuity

Back door lock assembly (half latch switch)

6

8

Open

Existed

Fully closed/Half latch

Not existed

Revision: 2008 October

2009 Murano

DLK-90

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2423 AUTOMATIC BACK DOOR MOTOR OPERATION TIME

B2423 AUTOMATIC BACK DOOR MOTOR OPERATION TIME

Description

INFOID:0000000003443840

The automatic back door motor is integrated in the automatic back door unit. The automatic back door motor
opens/closes the back door. 

DTC Logic

INFOID:0000000003443841

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON. 

2.

Operate automatic back door.

3.

Check “Self Diagnostic Result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

DLK-90, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003625974

1.

CHECK AUTOMATIC BACK DOOR MOTOR CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect automatic back door control unit connect and automatic back door unit connector.

3.

Check continuity between automatic back door control unit harness connector and automatic back door
unit harness connector.

4.

Check continuity between automatic back door control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace harness.

2.

CHECK AUTOMATIC BACK DOOR CONTROL UNIT OUTPUT

1.

Connect automatic back door control unit connector and automatic back door motor connector.

2.

Check voltage between automatic back door unit harness connector and ground.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2423

AUTOMATIC BACK 
DOOR MOTOR OPERA-
TION TIME

When the automatic power back door control unit 
and automatic back door motor operate in the same 
direction for 30 seconds or more continuously

• Clutch
• Automatic back door motor
• Back door mechanism
• Automatic back door unit
• Battery voltage (low battery)
• Harness

(automatic back door motor cir-
cuit is shorted)

Automatic back door control unit

Automatic back door unit

Continuity

 Connector

Terminal 

 Connector

Terminal 

B7

27

B76

7

Existed

29

8

Automatic back door control unit

Ground

Continuity

 Connector

Terminal 

B7

27

Not existed

29

Revision: 2008 October

2009 Murano

B2423 AUTOMATIC BACK DOOR MOTOR OPERATION TIME

DLK-91

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

Is the inspection result normal?

YES

>> Replace automatic back door unit. Refer to 

DLK-362, "POWER BACK DOOR DRIVE ASSEMBLY

: Removal and Installation"

.

NO

>> Replace automatic back door control unit. Refer to 

DLK-379, "Removal and Installation"

.

(+)

Condition

Voltage (V)

(Approx.)

Automatic back door control unit

(–)

Connector

Terminal 

B76

7

Ground

Automatic back 
door

Active (open)

Battery voltage

Active (close)

Other than above

0

8

Ground

Automatic back 
door

Active (close)

Battery voltage

Active (open)

Other than above

0

JMKIA1865ZZ

JMKIA1865ZZ

Revision: 2008 October

2009 Murano

DLK-92

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2424 CLOSURE CONDITION

B2424 CLOSURE CONDITION

Description

INFOID:0000000003510904

The back door lock assembly consists of the open switch, close switch, half latch switch and closure motor.
The automatic back door control unit determines the back door lock condition according to the signal from
each switch and performs the open/close operation of closure motor.

DTC Logic

INFOID:0000000003510905

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON. 

2.

Operate automatic back door.

3.

Check “Self Diagnostic Result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

DLK-92, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003625836

1.

CHECK OPEN/CLOSE SWITCH SIGNAL

Check open/close switch (“OPEN SW”“CLOSE SW”) in Data Monitor mode.

Is the inspection result normal?

YES

>> Open switch is OK.

NO

>> GO TO 2.

2.

CHECK AUTOMATIC BACK DOOR CONTROL UNIT 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.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2424

CLOSURE 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 shorted)

• Back door lock assembly

Monitor item

Condition

Status

OPEN SW

Back door lock

Fully closed/Half latch

OFF

Open

ON

CLOSE SW

Back door lock

Open/Half latch

OFF

Fully closed

ON

(+)

(–)

Voltage (V)

(Approx.)

Back door lock assembly

Connector

Terminal

D179

5

Ground

Battery voltage

4

Revision: 2008 October

2009 Murano

B2424 CLOSURE CONDITION

DLK-93

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

3.

CHECK OPEN/CLOSE SWITCH CIRCUIT

1.

Disconnect automatic back door control unit connector.

2.

Check continuity between automatic back door control unit harness connector and back door lock assem-
bly harness connector.

3.

Check continuity between automatic back door control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace automatic back door control unit. Refer to 

DLK-379, "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-93, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace back door lock assembly. Refer to 

DLK-361, "DOOR LOCK : Removal and Installation"

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000003625837

COMPONENT INSPECTION

1.

CHECK OPEN/CLOSE SWITCH

Check back door lock assembly (open/close switch).

Automatic back door control unit

 Back door lock assembly

Continuity 

 Connector

Terminal

Connector

Terminal

B8

19

D179

5

Existed

20

4

Automatic back door control unit

Ground

Continuity 

 Connector

Terminal

B8

19

Not existed

20

Back door lock assembly 

Ground

Continuity 

Connector

Terminal

D179

8

Existed

Terminal

Condition

Continuity

Back door lock assembly (close switch)

Revision: 2008 October

2009 Murano

DLK-94

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2424 CLOSURE CONDITION

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace back door lock assembly. Refer to 

DLK-361, "DOOR LOCK : Removal and Installation"

.

5

8

Back door lock

Fully closed

Existed

Open/Half latch

Not existed

4

Open

Existed

Fully closed/Half latch

Not existed

Revision: 2008 October

2009 Murano

B2621 INSIDE KEY ANTENNA 1

DLK-95

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

B2621 INSIDE KEY ANTENNA 1

Description

INFOID:0000000003318013

Detects whether Intelligent Key is inside the vehicle.
Installed in the instrument center.

DTC Logic

INFOID:0000000003318014

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT-III

1.

Perform inside key antenna (“INSIDE ANT DIAGNOSIS”) on Work Support” of “INTELLIGENT KEY”.

2.

Perform “INTELLIGENT KEY” Self Diagnostic Result.

Is inside key antenna DTC detected?

YES

>> Refer to 

DLK-95, "Diagnosis Procedure"

.

NO

>> Inside key antenna (instrument center) is OK.

Diagnosis Procedure

INFOID:0000000003318015

1.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1

1.

Turn ignition switch OFF.

2.

Check signal between BCM harness connector and ground with oscilloscope.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 2.

2.

CHECK INSIDE KEY ANTENNA CIRCUIT

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2621

INSIDE ANTENNA 1 
CIRCUIT

An excessive high or low voltage from inside anten-
na is sent to BCM.

• Inside key antenna (instrument 

center)

• Between BCM and Inside key an-

tenna (instrument center)

(+)

(–)

Condition

Signal

(Reference value.)

BCM

Connector

Terminal

M122

Instrument cen-

ter

78, 79

Ground

Place Intelligent Key inside the 
vehicle.

Place Intelligent Key outside 
the vehicle. 

JMKIA0062GB

JMKIA0063GB

Revision: 2008 October

2009 Murano

DLK-96

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2621 INSIDE KEY ANTENNA 1

1.

Disconnect BCM and inside key antenna connector.

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 between BCM and inside key antenna.

3.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL 2

1.

Replace inside key antenna (instrument center). (New antenna or other antenna)

2.

Connect BCM and inside key antenna (instrument center) connector.

3.

Check signal between BCM harness connector and ground with oscilloscope.

Is the inspection result normal?

YES

>> Replace inside key antenna (instrument center). Refer to 

DLK-369, "INSTRUMENT CENTER :

Removal and Installation"

.

NO

>> Replace BCM. Refer to 

BCS-96, "Removal and Installation"

.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

BCM

Inside key antenna (instrument center)

Continuity 

Connector

Terminal

Connector

Terminal

M122

78

M105

2

Existed

79

1

BCM

Ground

Continuity 

Connector

Terminal

M122

Instrument center

78

Not existed

79

(+)

(–)

Condition

Signal

(Reference value.)

BCM

Connector

Terminal

M122

Instrument cen-

ter

78, 79

Ground

Place Intelligent Key inside the 
vehicle.

Place Intelligent Key outside 
the vehicle. 

JMKIA0062GB

JMKIA0063GB

Revision: 2008 October

2009 Murano

B2622 INSIDE KEY ANTENNA 2

DLK-97

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

B2622 INSIDE KEY ANTENNA 2

Description

INFOID:0000000003318016

Detects whether Intelligent Key is inside the vehicle.
Installed in the console.

DTC Logic

INFOID:0000000003318017

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT-III

1.

Perform inside key antenna (“INSIDE ANT DIAGNOSIS”) on “Work Support” of “INTELLIGENT KEY”.

2.

Perform “INTELLIGENT KEY” Self Diagnostic Result.

Is inside key antenna DTC detected?

YES

>> Refer to 

DLK-97, "Diagnosis Procedure"

.

NO

>> Inside key antenna (console) is OK.

Diagnosis Procedure

INFOID:0000000003318018

1.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1

1.

Turn ignition switch OFF.

2.

Check signal between BCM harness connector and ground with oscilloscope.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 2.

2.

CHECK INSIDE KEY ANTENNA CIRCUIT

1.

Disconnect BCM and inside key antenna (console) connector.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2622

INSIDE ANTENNA 2 
CIRCUIT

An excessive high or low voltage from inside anten-
na is sent to BCM.

• Inside key antenna (console)
• Between BCM

〜

Inside key anten-

na (console)

(+)

(–)

Condition

Signal

(Reference value.)

BCM

Connector

Terminal

M122

Console

72, 73

Ground

Place Intelligent Key inside the 
vehicle.

Place Intelligent Key outside the 
vehicle. 

JMKIA0062GB

JMKIA0063GB

Revision: 2008 October

2009 Murano

DLK-98

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2622 INSIDE KEY ANTENNA 2

2.

Check continuity between BCM harness connector and inside key antenna 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 between BCM and inside key antenna.

3.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL 2

1.

Replace inside key antenna (console). (New antenna or other antenna)

2.

Connect BCM and inside key antenna (console) connector.

3.

Check signal between BCM harness connector and ground with oscilloscope.

Is the inspection result normal?

YES

>> Replace inside key antenna (console). Refer to 

DLK-370, "CONSOLE : Removal and Installation"

.

NO

>> Replace BCM. Refer to 

BCS-96, "Removal and Installation"

.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

BCM

Inside key antenna (console)

Continuity 

Connector

Terminal

Connector

Terminal

M122

72

M305

2

Existed

73

1

BCM

Ground

Continuity 

Connector

Terminal

M122

Console

72

Not existed

73

(+)

(–)

Condition

Signal

(Reference value.)

BCM

Connector

Terminal

M122

Console

72, 73

Ground

Place Intelligent Key inside the 
vehicle.

Place Intelligent Key outside the 
vehicle. 

JMKIA0062GB

JMKIA0063GB

Revision: 2008 October

2009 Murano

B2623 INSIDE KEY ANTENNA 3

DLK-99

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

B2623 INSIDE KEY ANTENNA 3

Description

INFOID:0000000003318019

Detects whether Intelligent Key is inside the vehicle.
Installed in the luggage room.

DTC Logic

INFOID:0000000003318020

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT-III

1.

Perform inside key antenna (“INSIDE ANT DIAGNOSIS”) on “Work Support” of “INTELLIGENT KEY”.

2.

Perform “INTELLIGENT KEY” Self Diagnostic Result.

Is inside key antenna DTC detected?

YES

>> Refer to 

DLK-99, "Diagnosis Procedure"

.

NO

>> Inside key antenna (luggage room) is OK.

Diagnosis Procedure

INFOID:0000000003318021

1.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1

1.

Turn ignition switch OFF.

2.

Check signal between BCM harness connector and ground with oscilloscope.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 2.

2.

CHECK INSIDE KEY ANTENNA CIRCUIT

1.

Disconnect BCM and inside key antenna (luggage room) connector.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2623

INSIDE ANTENNA 3 
CIRCUIT

An excessive high or low voltage from inside anten-
na is sent to BCM.

• Inside key antenna (luggage room)
• Between BCM

〜

Inside key anten-

na (luggage room)

Terminals

Condition

Signal

(Reference value.)

(+)

(–)

BCM connector

Terminal

M121

Luggage room

34, 35

Ground

Place Intelligent Key inside the 
vehicle.

Place Intelligent Key outside 
the vehicle. 

JMKIA0062GB

JMKIA0063GB

Revision: 2008 October

2009 Murano