Nissan X-Trail 32. Manual - part 451

B2428 AUTOMATIC BACK DOOR CONTROL UNIT

DLK-145

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

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B2428 AUTOMATIC BACK DOOR CONTROL UNIT

DTC Description

INFOID:0000000010708097

DTC DETECTION LOGIC

POSSIBLE CAUSE

Automatic back door control unit

FAIL-SAFE

Inhibit automatic back door operation

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Operate automatic back door.

3.

Check “Self Diagnostic Result” mode of “AUTO BACK DOOR” using CONSULT.

Is DTC detected?

YES

>> Refer to 

DLK-145, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010708098

1.

REPLACE AUTOMATIC BACK DOOR CONTROL UNIT

When DTC B2428 is detected, replace automatic back door control unit.

>> Replace automatic back door control unit. Refer to 

DLK-327, "Removal and Installation"

.

DTC No.

CONSULT screen items (Trou-

ble diagnosis content)

DTC detecting condition

B2428

AUTO BACK DR CNT UNIT

(Auto back door control unit)

Automatic back door control unit detected CPU malfunction

DLK-146

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

B242A CLOSURE CONDITION

B242A CLOSURE CONDITION

DTC Description

INFOID:0000000010708099

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Entry of foreign materials to back door lock assembly
• Back door mechanism
• Close switch
• Half latch switch
• Open switch
• Harness or connectors (open or shorted)
• Automatic back door control unit

FAIL-SAFE

Inhibit automatic back door operation

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Operate back door auto closure operation.

3.

Check “Self Diagnostic Result” mode of “AUTO BACK DOOR” using CONSULT.

Is DTC detected?

YES

>> Refer to 

DLK-146, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010708100

1.

CHECK FOR FOREIGN MATERIALS IN BACK DOOR LOCK ASSEMBLY

Check for entry of foreign materials in back door lock assembly.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Remove foreign materials.

2.

CHECK BACK DOOR OPEN/CLOSE OPERATION

Manually check open and close operation of back door.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace the malfunctioning parts.

3.

CHECK MONITOR ITEM

1.

Turn ignition switch ON.

2.

Select “AUTO BACK DOOR” using CONSULT.

3.

Select “HALF LATCH SW”, “OPEN SW” and “CLOSE SW” in “DATA MONITOR” mode.

4.

Check that the function operates normally according to the following conditions.

DTC No.

CONSULT screen items (Trou-

ble diagnosis content)

DTC detecting condition

B242A

CLSR CONDITION

(Closure condition)

Automatic back door control unit detects malfunctions of open switch, 
close switch and half latch switch when auto closure of back door operates

B242A CLOSURE CONDITION

DLK-147

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

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Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 4.

4.

CHECK SWITCH INPUT 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 6.

NO

>> GO TO 5.

5.

CHECK 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-327, "Removal and Installation"

.

NO

>> Repair or replace harness.

6.

CHECK SWITCH GROUND CIRCUIT

Check continuity between back door lock assembly harness connector and ground.

Monitor item

Condition

Status

HALF LATCH SW

Back door

Fully closed

OFF

Open

ON

OPEN SW

Closure operation

ON

Other than above

OFF

CLOSE SW

Closure operation

ON

Other than above

OFF

(+)

(–)

Voltage

(Approx.)

Back door lock assembly

Connector

Terminal

D172

4

Ground

12.2 V

5

12.2 V

6

12  V

Automatic back door control unit

Back door lock assembly

Continuity 

 Connector

Terminal

 Connector

Terminal

B24

3

D172

6

Existed

5

5

11

4

Automatic back door control unit

Ground

Continuity 

 Connector

Terminal

B24

3

Not existed

5

11

DLK-148

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 1]

B242A CLOSURE CONDITION

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace back door lock assembly ground circuit.

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-44, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair or replace harness.

8.

REPLACE BACK DOOR LOCK ASSEMBLY

1.

Replace back door lock assembly.

2.

Erase DTC.

3.

Perform DTC confirmation procedure for DTC 242A. Refer to 

DLK-146, "DTC Description"

.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> Replace automatic back door control unit. Refer to 

DLK-327, "Removal and Installation"

.

Back door lock assembly

Ground

Continuity 

 Connector

Terminal

D172

8

Existed