Nissan Murano Z51. Manual - part 393

DLK-80

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2419 OPEN SWITCH

NO

>> Replace back door lock assembly. Refer to 

DLK-353, "DOOR LOCK : Removal and Installation"

.

B2420 CLOSE SWITCH

DLK-81

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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B2420 CLOSE SWITCH

Description

INFOID:0000000005517506

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

DTC Logic

INFOID:0000000005517507

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-81, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005517508

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

DLK-82

< DTC/CIRCUIT 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-370, "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-150, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace back door lock assembly. Refer to 

DLK-353, "DOOR LOCK : Removal and Installation"

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005517509

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-353, "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

B2421 CLUTCH OPERATION TIME

DLK-83

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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B2421 CLUTCH OPERATION TIME

Description

INFOID:0000000005517510

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:0000000005517511

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-83, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005517512

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-370, "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