Nissan Murano Z51. Manual - part 392

DLK-76

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2418 CLUTCH POWER SUPPLY CIRCUIT

B2418 CLUTCH POWER SUPPLY CIRCUIT

Description

INFOID:0000000005517499

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:0000000005517500

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-76, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005517501

1.

CHECK CLUTCH CIRCUIT

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

>> GO TO 2.

NO

>> Repair or replace harness.

2.

CHECK CLUTCH

1.

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

2.

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

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2418

CLUTCH POWER 
SUPPLY CIRCUIT

When the automatic power back door control unit 
detects any of the following conditions just after the 
open/close operation
• Clutch power supply circuit is shorted.
• Clutch is shorted.

• Clutch
• Harness or connectors

(Clutch circuit is shorted)

• Automatic back door control unit

Automatic back door control unit

Automatic back door unit

Continuity 

Connector

Terminal

 Connector

Terminal

B7

33

B76

3

Existed

Automatic back door control unit

Ground

Continuity 

 Connector

Terminal

B7

33

Not existed

B2418 CLUTCH POWER SUPPLY CIRCUIT

DLK-77

< DTC/CIRCUIT 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

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

NO

>> Replace automatic back door unit. Refer to 

DLK-370, "Removal and Installation"

.

(+)

(–)

Condition

Voltage (V)

(Approx.)

Automatic back door control unit

Connector

Terminal

B7

33

Ground

Automatic back 
door

Active

Other than 
above

0

JMKIA1866ZZ

DLK-78

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2419 OPEN SWITCH

B2419 OPEN SWITCH

Description

INFOID:0000000005517502

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

DTC Logic

INFOID:0000000005517503

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-78, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005517504

1.

CHECK OPEN SWITCH SIGNAL

Check open switch (“OPEN 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?

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2419

OPEN SWITCH

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

for 1 second or more after starting the closure 
open output for the 3rd time in a row

• The change of open switch cannot be detected 

for 0.5 second or more after starting the closure 
close output for the 3rd time in a row

• The condition that the open switch is in the ON 

position and the close switch is in the OFF posi-
tion is detected when starting the closure open/
close output for the 3rd time in a row

• Open switch
• Harness or connectors

(Open switch circuit is open or 
shorted)

• Automatic back door control unit

Monitor item

Condition

Status

OPEN SW

Back door lock

Fully closed/Half latch

OFF

Open

ON

(+)

(–)

Voltage (V)

(Approx.)

Back door lock assembly

 Connector

Terminal

D179

4

Ground

Battery voltage

B2419 OPEN SWITCH

DLK-79

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK OPEN SWITCH CIRCUIT

1.

Disconnect automatic back door control unit and back door lock assembly 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-370, "Removal and Installation"

.

NO

>> Repair or replace harness.

4.

CHECK OPEN 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 OPEN SWITCH

Refer to 

DLK-79, "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:0000000005517505

COMPONENT INSPECTION

1.

CHECK OPEN SWITCH

Check back door lock assembly (open switch).

Is the inspection result normal?

YES

>> INSPECTION END

Automatic back door control unit

 Back door lock assembly

Continuity 

Connector

Terminal

Connector

Terminal

B8

20

D179

4

Existed

Automatic back door control unit

Ground

Continuity 

Connector

Terminal

B8

20

Not existed

Back door lock assembly 

Ground

Continuity 

Connector

Terminal

D179

8

Existed

Terminal

Condition

Continuity

Back door lock assembly (open switch)

4

8

Back door lock

Open

Existed

Fully closed/Half latch

Not existed