Nissan Murano. Manual - part 364

B2403 ENCODER

DLK-67

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

B2403 ENCODER

Description

INFOID:0000000009718930

The automatic back door control unit receives the pulse signals from encoders A and B that occurred due to
synchronization with the back door operation. The automatic back door control unit calculates the back door
position, operation direction, and operation speed according to the received pulse signals.

DTC Logic

INFOID:0000000009718931

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.

Is DTC detected?

YES

>> Go to 

DLK-67, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009718932

1.

CHECK ENCODER SIGNAL

Check encoder (“ENCODER A”, “ENCODER B”) in Data Monitor mode.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-44, "Intermittent Incident"

.

NO

>> GO TO 2.

2.

CHECK ENCODER POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect automatic back door unit connector.

3.

Check voltage between automatic back door unit 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

B2403

ENCODER

When the automatic back door control unit cannot re-
ceive the signal from the encoder just after starting the 
open/close operation

• Encoder
• Harness or connectors

(Encoder circuit is open or short-
ed)

• Automatic back door control unit

Monitor item

Condition

Status

 ENCODER A

Back door

Moving

Change HI or LO

Stop

No change HI or LO

 ENCODER B

Back door

Moving

Change HI or LO

Stop

No change HI or LO

(+)

(–)

Voltage (V)

(Approx.)

Automatic back door unit connector

Connector

Terminal

B76

2

Ground

Battery voltage

DLK-68

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2403 ENCODER

3.

CHECK ENCODER POWER SUPPLY CIRCUIT

1.

Disconnect automatic back door control unit connector.

2.

Check continuity between automatic back door control unit harness connector and automatic back door
unit 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-368, "Removal and Installation"

.

NO

>> Repair or replace harness.

4.

CHECK ENCODER GROUND CIRCUIT

1.

Disconnect automatic back door control unit connector.

2.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness.

5.

CHECK ENCODER SIGNAL CIRCUIT

1.

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

2.

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

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace harness.

6.

CHECK ENCODER

1.

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

2.

Check voltage between automatic back door control unit and ground.

Automatic back door control unit

Automatic back door unit

Continuity

 Connector

Terminal

 Connector

Terminal

B8

26

B76

2

Existed

Automatic back door control unit

Ground

Continuity

 Connector

Terminal

B8

26

Not existed

Automatic back door control unit

Automatic back door unit

Continuity

 Connector

Terminal

 Connector

Terminal

B8

23

B76

6

Existed

Automatic back door control unit

Automatic back door unit

Continuity

 Connector

Terminal

 Connector

Terminal

B8

24

B76

5

Existed

25

1

Automatic back door control unit

Ground

Continuity

 Connector

Terminal

B8

24

Not existed

25

B2403 ENCODER

DLK-69

< 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

>> Replace automatic back door control unit. Refer to 

DLK-368, "Removal and Installation"

.

NO

>> Replace automatic back door unit. Refer to 

DLK-352, "POWER BACK DOOR DRIVE ASSEMBLY

: Removal and Installation"

.

(+)

(–)

Condition

Voltage (V)

(Approx.)

Automatic back door control unit

Connector

Terminal 

B8

24

Ground

Back door

Moving

Stop

0/Battery voltage

25

Ground

Back door

Moving

Stop

0/Battery voltage

JMKIA1864ZZ

JMKIA1864ZZ

DLK-70

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2409 HALF LATCH SWITCH

B2409 HALF LATCH SWITCH

Description

INFOID:0000000009718933

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

DTC Logic

INFOID:0000000009718934

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Operate power back door from closed to open.

3.

Check “Self Diagnostic Result” CONSULT.

Is DTC detected?

YES

>> Go to 

DLK-70, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009718935

1.

CHECK HALF LATCH SWITCH SIGNAL

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.

2.

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

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2409

HALF LATCH 
SWITCH

When the automatic back door control unit cannot 
detect the half latch switch ON condition even when 
the back door is in the open position 

• Half latch switch 
• Harness or connectors

(Half latch switch circuit is open)

• Automatic back door control unit

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