Nissan Murano. Manual - part 368

B2421 CLUTCH OPERATION TIME

DLK-83

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

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B2421 CLUTCH OPERATION TIME

Description

INFOID:0000000009718956

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:0000000009718957

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON. 

2.

Check “Self Diagnostic Result” with CONSULT.

Is DTC detected?

YES

>> Go to 

DLK-83, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009718958

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-368, "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

DLK-84

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2422 BACK DOOR STATE

B2422 BACK DOOR STATE

Description

INFOID:0000000009718959

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

DTC Logic

INFOID:0000000009718960

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-84, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009718961

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

B2422 BACK DOOR STATE

DLK-85

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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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-368, "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-85, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace back door lock assembly. Refer to 

DLK-351, "DOOR LOCK : Removal and Installation"

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-44, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000009718962

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-351, "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

DLK-86

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2423 AUTOMATIC BACK DOOR MOTOR OPERATION TIME

B2423 AUTOMATIC BACK DOOR MOTOR OPERATION TIME

Description

INFOID:0000000009718963

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:0000000009718964

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-86, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009718965

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