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Nissan Pathfinder Owners & Service Manuals

Nissan Pathfinder: Dtc/circuit Diagnosis (B2419-12 Open Switch ... B2428-54 Automatic Back Door Control Unit)

Nissan Pathfinder (R53) 2022-2025 Service Manual / Body Exterior, Doors, Roof & Vehicle Security :: Door & Lock / Dtc/circuit Diagnosis / Dtc/circuit Diagnosis (B2419-12 Open Switch ... B2428-54 Automatic Back Door Control Unit)

B2419-12 Open Switch Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC Detection Condition
B2419-12

Open switch

(Open switch) 		Diagnosis condition When the door unlock operates while ignition switch is OFF (auto ACC OFF status) or the battery terminal is removed
Signal (terminal) Open switch signal
Threshold When automatic back door control unit detect power short of open switch circuit
Diagnosis delay time 1 second or less

POSSIBLE CAUSE

  • Harness or connector (open switch circuit is power short)

  • Automatic back door control unit

  • Back door lock assembly (open switch)

FAIL-SAFE

Inhibit automatic back door system all function

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. When the door unlock operates by Intelligent Key or door request switch while ignition switch is OFF (auto ACC OFF status).

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

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK OPEN SWITCH INPUT SIGNAL

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

(+) (–) Condition

Voltage

(Approx.)
Automatic back door control unit
Connector Terminal
B55 11 Ground Back door Closure operation 0 V
Other than above Battery voltage

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

GO TO 5.

CHECK CONNECTOR

  1. Ignition switch OFF.

  2. Check the automatic back door control unit harness connector for disconnection or looseness.

  3. Check the back door lock assembly harness connector for disconnection or looseness.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair/replace harness or connector, securely lock the connector, and GO TO 5.

CHECK AUTOMATIC BACK DOOR CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

Check the automatic back door control unit power supply and ground circuits. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair/replace harness, connector, fuse, or fusible link, and GO TO 5.

CHECK TERMINAL

  1. Ignition switch OFF.

  2. Disconnect automatic back door control unit harness connector and then check the automatic back door control unit pin terminals for damage or loose connection with harness connector.

  3. Disconnect back door lock assembly harness connector and check back door lock assembly pin terminal for damage or loose connection with harness connector.

Is the inspection result normal?

YES>>

Replace automatic back door control unit. Refer to Removal and Installation.

NO>>

Repair/replace harness, connector, or terminal.

CHECK OPEN SWITCH CIRCUIT

  1. Disconnect automatic back door control unit connector and back door lock assembly connector.

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

    Automatic back door control unit —

    Voltage

    (Approx.)
    Connector Terminal
    B55 11 Ground 0 V

Is the inspection result normal?

YES>>

Replace back door lock assembly. Refer to Removal and Installation.

NO>>

Repair or replace harness.

B2419-14 Open Switch Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC Detection Condition
B2419-14

Open switch

(Open switch) 		Diagnosis condition When automatic back door open/close function operate
Signal (terminal) Open switch signal
Threshold

Automatic back door control unit detects when one of the following conditions is satisfied

  • Open switch circuit is ground short

  • Open switch is stuck ON
Diagnosis delay time 4 consecutive times

POSSIBLE CAUSE

  • Harness or connector (open switch circuit is ground short)

  • Automatic back door control unit

  • Back door lock assembly (open switch)

FAIL-SAFE

Inhibit automatic back door system all function

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Ignition switch ON.

  2. Operate automatic back door 4 times.

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

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK OPEN SWITCH INPUT SIGNAL

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

(+) (–) Condition

Voltage

(Approx.)
Automatic back door control unit
Connector Terminal
B55 11 Ground Back door Closure operation 0 V
Other than above Battery voltage

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

GO TO 5.

CHECK CONNECTOR

  1. Ignition switch OFF.

  2. Check the automatic back door control unit harness connector for disconnection or looseness.

  3. Check the back door lock assembly harness connector for disconnection or looseness.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair/replace harness or connector, securely lock the connector, and GO TO 5.

CHECK AUTOMATIC BACK DOOR CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

Check the automatic back door control unit power supply and ground circuits. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair/replace harness, connector, fuse, or fusible link, and GO TO 5.

CHECK TERMINAL

  1. Ignition switch OFF.

  2. Disconnect automatic back door control unit harness connector and then check the automatic back door control unit pin terminals for damage or loose connection with harness connector.

  3. Disconnect back door lock assembly harness connector and check back door lock assembly pin terminal for damage or loose connection with harness connector.

Is the inspection result normal?

YES>>

Replace automatic back door control unit. Refer to Removal and Installation.

NO>>

Repair/replace harness, connector, or terminal.

CHECK OPEN SWITCH CIRCUIT

  1. Ignition switch OFF.

  2. Disconnect automatic back door control unit connector and back door lock assembly connector.

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

    Automatic back door control unit Back door lock assembly Continuity
    Connector Terminal Connector Terminal
    B55 11 D557 4 Yes

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

    Automatic back door control unit (-) Continuity
    Connector Terminal
    B55 11 Ground No

Is the inspection result normal?

YES>>

Replace back door lock assembly. Refer to Removal and Installation.

NO>>

Repair or replace harness.

B2422-78 Back Door Position Abnormal Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC Detection Condition
B2422-78

Back door position abnormal

(Back door position abnormal) 		Diagnosis condition All times
Signal (terminal) Encoder LH signal
Threshold When the automatic back door control unit detects back door position malfunction according to the encoder signal
Diagnosis delay time 1 second or less

POSSIBLE CAUSE

  • Spindle unit LH

  • Automatic back door control unit

  • Harness or connector (encoder LH circuit is open or shorted)

FAIL-SAFE

Inhibit automatic back door system (only operate back door closure function)

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Ignition switch ON.

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

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK ENCODER SIGNAL

CONSULT

  1. Ignition switch ON.

  2. Select “AUTO BACK DOOR”.

  3. Select “Spindle sensor LH” in “DATA MONITOR” mode.

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

    Monitor item Condition Status
    Spindle sensor LH Back door Open The numeral value increases
    Close The numeral value decreases

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

GO TO 2.

CHECK ENCODER INPUT SIGNAL

Check signal between automatic back door control unit harness connector and ground using oscilloscope.

(+) (–) Condition

Signal

(Reference value)
Automatic back door control unit
Connector Terminal
B55 29 Ground Back door Moving (auto)

When stopped 0 – 1 V or 9 – 16 V
30 Moving (auto)

When stopped 0 – 1 V or 9 – 16 V

Is the inspection result normal?

YES>>

GOT TO 3.

NO>>

GO TO 6.

CHECK CONNECTOR

  1. Ignition switch OFF.

  2. Check the automatic back door control unit harness connector for disconnection or looseness.

  3. Check the spindle unit LH harness connector for disconnection or looseness.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair/replace harness or connector, securely lock the connector, and GO TO 5.

CHECK AUTOMATIC BACK DOOR CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

Check the automatic back door control unit power supply and ground circuits. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair/replace harness, connector, fuse, or fusible link, and GO TO 5.

CHECK TERMINAL

  1. Ignition switch OFF.

  2. Disconnect automatic back door control unit harness connector and then check the automatic back door control unit pin terminals for damage or loose connection with harness connector.

  3. Disconnect spindle unit LH harness connector and check spindle unit LH pin terminal for damage or loose connection with harness connector.

Is the inspection result normal?

YES>>

Replace automatic back door control unit. Refer to Removal and Installation.

NO>>

Repair/replace harness, connector, or terminal.

CHECK ENCODER CIRCUIT

  1. Ignition switch OFF.

  2. Disconnect automatic back door control unit connector and spindle unit LH connector.

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

    Automatic back door control unit Spindle unit LH Continuity
    Connector Terminal Connector Terminal
    B55 29 B70 5 Yes
    30 3

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

    Automatic back door control unit (-) Continuity
    Connector Terminal
    B55 29 Ground No
    30

Is the inspection result normal?

YES>>

Replace spindle unit LH. Refer to Removal and Installation.

NO>>

Repair or replace harness.

B2426-11 Spindle Sensor Lh Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC Detection Condition
B2426-11

Spindle sensor LH

(Spindle sensor left hand) 		Diagnosis condition When automatic back door open/close function operate
Signal (terminal) Encoder LH signal
Threshold Automatic back door control unit cannot detect the encoder LH signal
Diagnosis delay time 1 second or less

POSSIBLE CAUSE

  • Spindle unit LH

  • Automatic back door control unit

  • Harness or connector (encoder LH circuit is open or shorted)

FAIL-SAFE

Inhibit automatic back door system (only operate back door closure function)

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Ignition switch ON.

  2. Operate automatic back door.

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

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK ENCODER SIGNAL

CONSULT

  1. Ignition switch ON.

  2. Select “AUTO BACK DOOR”.

  3. Select “Spindle sensor LH” in “DATA MONITOR” mode.

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

    Monitor item Condition Status
    Spindle sensor LH Back door Open The numeral value increases
    Close The numeral value decreases

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

GO TO 2.

CHECK ENCODER POWER SUPPLY

  1. Ignition switch OFF.

  2. Disconnect spindle unit LH connector.

  3. Check voltage between spindle unit LH harness connector and ground.

    (+) (–)

    Voltage

    (Approx.)
    Spindle unit LH
    Connector Terminal
    B70 4 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

GO TO 3.

CHECK ENCODER CIRCUIT-1

  1. Disconnect automatic back door control unit connector.

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

    Automatic back door control unit Spindle unit LH Continuity
    Connector Terminal Connector Terminal
    B55 31 B70 4 Yes

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

    Automatic back door control unit (-) Continuity
    Connector Terminal
    B55 31 Ground No

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace harness.

CHECK CONNECTOR

  1. Ignition switch OFF.

  2. Check the automatic back door control unit harness connector for disconnection or looseness.

  3. Check the spindle unit LH harness connector for disconnection or looseness.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair/replace harness.

CHECK AUTOMATIC BACK DOOR CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

Check the automatic back door control unit power supply and ground circuits. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair/replace harness, connector, fuse, or fusible link, and GO TO 5.

CHECK TERMINAL

  1. Ignition switch OFF.

  2. Disconnect automatic back door control unit harness connector and then check the automatic back door control unit pin terminals for damage or loose connection with harness connector.

  3. Disconnect spindle unit LH harness connector and check spindle unit LH pin terminal for damage or loose connection with harness connector.

Is the inspection result normal?

YES>>

Replace automatic back door control unit. Refer to Removal and Installation.

NO>>

Repair/replace harness, connector, or terminal.

CHECK ENCODER CIRCUIT-2

  1. Disconnect automatic back door control unit connector and spindle unit RH connector.

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

    Automatic back door control unit Spindle unit LH Continuity
    Connector Terminal Connector Terminal
    B55 28 B70 2 Yes

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

    Automatic back door control unit (-) Continuity
    Connector Terminal
    B55 28 Ground No

Is the inspection result normal?

YES>>

Replace spindle unit LH. Refer to Removal and Installation.

NO>>

Repair or replace harness.

B2426-12 Spindle Sensor Lh Nissan Pathfinder 5th Gen

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC Detection Condition
B2426-12

Spindle sensor LH

(Spindle sensor left hand) 		Diagnosis condition When the door unlock operates while ignition switch is OFF (auto ACC OFF status) or the battery terminal is removed
Signal (terminal) Encoder LH signal
Threshold When automatic back door control unit detect power short of encoder LH circuit
Diagnosis delay time 1 second or less

POSSIBLE CAUSE

  • Spindle unit LH

  • Automatic back door control unit

  • Harness or connector (encoder LH circuit is power short)

FAIL-SAFE

Inhibit automatic back door system (only operate back door closure function)

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. When the door unlock operates by Intelligent Key or door request switch while ignition switch is OFF (auto ACC OFF status).

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

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK ENCODER SIGNAL

CONSULT

  1. Ignition switch ON.

  2. Select “AUTO BACK DOOR”.

  3. Select “Spindle sensor LH” in “DATA MONITOR” mode.

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

    Monitor item Condition Status
    Spindle sensor LH Back door Open The numeral value increases
    Close The numeral value decreases

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

GO TO 2.

CHECK ENCODER CIRCUIT

  1. Disconnect automatic back door control unit connector, spindle unit LH connector and spindle unit RH connector.

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

    Automatic back door control unit —

    Voltage

    (Approx.)
    Connector Terminal
    B55 28 Ground 0 V
    31

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness.

REPLACE SPINDLE UNIT LH

Replace spindle unit LH. Refer to Removal and Installation.

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace automatic back door control unit. Refer to Removal and Installation.

B2426-13 Spindle Sensor Lh Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC Detection Condition
B2426-13

Spindle sensor LH

(Spindle sensor left hand) 		Diagnosis condition When automatic back door open/close function operate
Signal (terminal) Encoder LH signal
Threshold Automatic back door control unit cannot detect the encoder LH signal
Diagnosis delay time 1 second or less

POSSIBLE CAUSE

  • Spindle unit LH

  • Automatic back door control unit

  • Harness or connector (encoder LH circuit is open)

FAIL-SAFE

Inhibit automatic back door system (only operate back door closure function)

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Ignition switch ON.

  2. Operate automatic back door.

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

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK ENCODER SIGNAL

CONSULT

  1. Ignition switch ON.

  2. Select “AUTO BACK DOOR”.

  3. Select “Spindle sensor LH” in “DATA MONITOR” mode.

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

    Monitor item Condition Status
    Spindle sensor LH Back door Open The numeral value increases
    Close The numeral value decreases

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

GO TO 2.

CHECK ENCODER INPUT SIGNAL

Check signal between automatic back door control unit harness connector and ground using oscilloscope.

(+) (–) Condition

Signal

(Reference value)
Automatic back door control unit
Connector Terminal
B55 29 Ground Back door Moving (auto)

When stopped 0 – 1 V or 9 – 16 V
30 Moving (auto)

When stopped 0 – 1 V or 9 – 16 V

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 3.

CHECK ENCODER CIRCUIT

  1. Ignition switch OFF.

  2. Disconnect automatic back door control unit connector and spindle unit LH connector.

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

    Automatic back door control unit Spindle unit LH Continuity
    Connector Terminal Connector Terminal
    B55 29 B70 5 Yes
    30 3

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

    Automatic back door control unit — Continuity
    Connector Terminal
    B55 29 Ground No
    30

Is the inspection result normal?

YES>>

Replace spindle unit LH. Refer to Removal and Installation.

NO>>

Repair or replace harness.

CHECK ENCODER POWER SUPPLY

  1. Ignition switch OFF.

  2. Disconnect spindle unit LH connector.

  3. Check voltage between spindle unit LH harness connector and ground.

    (+) (–)

    Voltage

    (Approx.)
    Spindle unit LH
    Connector Terminal
    B70 4 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

GO TO 5.

CHECK ENCODER CIRCUIT-1

  1. Disconnect automatic back door control unit connector.

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

    Automatic back door control unit Spindle unit LH Continuity
    Connector Terminal Connector Terminal
    B55 31 B70 4 Yes

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

    Automatic back door control unit — Continuity
    Connector Terminal
    B55 31 Ground No

Is the inspection result normal?

YES>>

Replace automatic back door control unit. Refer to Removal and Installation.

NO>>

Repair or replace harness.

CHECK ENCODER CIRCUIT-2

  1. Disconnect automatic back door control unit connector.

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

    Automatic back door control unit Spindle unit LH Continuity
    Connector Terminal Connector Terminal
    B55 28 B70 2 Yes

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

    Automatic back door control unit — Continuity
    Connector Terminal
    B55 28 Ground No

Is the inspection result normal?

YES>>

Replace spindle unit LH. Refer to Removal and Installation.

NO>>

Repair or replace harness.

B2426-25 Spindle Sensor Lh Nissan Pathfinder SUV

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC Detection Condition
B2426-25

Spindle sensor LH

(Spindle sensor left hand) 		Diagnosis condition When automatic back door open/close function operate
Signal (terminal) Encoder LH signal
Threshold Automatic back door control unit cannot detect the encoder LH signal
Diagnosis delay time Less than 40 pulse

POSSIBLE CAUSE

  • Spindle unit LH

  • Automatic back door control unit

  • Harness or connector (encoder LH circuit is open or shorted)

FAIL-SAFE

Inhibit automatic back door system (only operate back door closure function)

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Ignition switch ON.

  2. Operate automatic back door.

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

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK ENCODER SIGNAL

CONSULT

  1. Ignition switch ON.

  2. Select “AUTO BACK DOOR”.

  3. Select “Spindle sensor LH” in “DATA MONITOR” mode.

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

    Monitor item Condition Status
    Spindle sensor LH Back door Open The numeral value increases
    Close The numeral value decreases

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

GO TO 2.

CHECK ENCODER INPUT SIGNAL

Check signal between automatic back door control unit harness connector and ground using oscilloscope.

(+) (–) Condition

Signal

(Reference value)
Automatic back door control unit
Connector Terminal
B55 29 Ground Back door Moving (auto)

When stopped 0 – 1 V or 9 – 16 V
30 Moving (auto)

When stopped 0 – 1 V or 9 – 16 V

Is the inspection result normal?

YES>>

Replace automatic back door control unit. Refer to Removal and Installation.

NO>>

GO TO 3.

CHECK ENCODER CIRCUIT

  1. Ignition switch OFF.

  2. Disconnect automatic back door control unit connector and spindle unit LH connector.

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

    Automatic back door control unit Spindle unit LH Continuity
    Connector Terminal Connector Terminal
    B55 29 B70 5 Yes
    30 3

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

    Automatic back door control unit (-) Continuity
    Connector Terminal
    B55 29 Ground No
    30

Is the inspection result normal?

YES>>

Replace spindle unit LH. Refer to Removal and Installation.

NO>>

Repair or replace harness.

B2428-44 Automatic Back Door Control Unit Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC Detection Condition
B2428-44

Automatic back door control unit

(Automatic back door control unit) 		Diagnosis condition All times
Signal (terminal) —
Threshold Automatic back door control unit internal malfunction (data memory error)
Diagnosis delay time —

POSSIBLE CAUSE

Automatic back door control unit

FAIL-SAFE

Inhibit automatic back door system all function

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Ignition switch ON.

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

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

REPLACE AUTOMATIC BACK DOOR CONTROL UNIT

When DTC B2428-44 is detected, replace automatic back door control unit.

>>

Replace automatic back door control unit. Refer to Removal and Installation.

B2428-52 Automatic Back Door Control Unit Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC Detection Condition
B2428-52

Automatic back door control unit

(Automatic back door control unit) 		Diagnosis condition All times
Signal (terminal) —
Threshold Automatic back door control unit internal malfunction (program error)
Diagnosis delay time 1 second or less

POSSIBLE CAUSE

Automatic back door control unit

FAIL-SAFE

Inhibit automatic back door system all function

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Ignition switch ON.

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

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK CONNECTOR

  1. Ignition switch OFF.

  2. Check the automatic back door control unit harness connector for disconnection or looseness.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair/replace harness or connector, securely lock the connector.

CHECK AUTOMATIC BACK DOOR CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

Check the automatic back door control unit power supply and ground circuits. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair/replace harness, connector, fuse, or fusible link.

CHECK TERMINAL

  1. Ignition switch OFF.

  2. Disconnect automatic back door control unit harness connector and then check the automatic back door control unit pin terminals for damage or loose connection with harness connector.

Is the inspection result normal?

YES>>

Replace automatic back door control unit. Refer to Removal and Installation.

NO>>

Repair/replace harness, connector, or terminal.

B2428-54 Automatic Back Door Control Unit Nissan Pathfinder 2022

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC Detection Condition
B2428-54

Automatic back door control unit

(Automatic back door control unit) 		Diagnosis condition All times
Signal (terminal) —
Threshold When the calibration of [CALIBRATION OF AUTOMATIC BACK DOOR POSITION INFORMATION] is not complete
Diagnosis delay time 1 second or less

POSSIBLE CAUSE

[CALIBRATION OF AUTOMATIC BACK DOOR POSITION INFORMATION]: not complete

FAIL-SAFE

Inhibit automatic back door system all function

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Ignition switch ON.

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

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CALIBRATION OF AUTOMATIC BACK DOOR POSITION INFORMATION

  1. Perform initialization setting of automatic back door position information. Refer to Work Procedure.

  2. Erase DTC, and then repeat “DTC CONFIRMATION PROCEDURE”. Refer to DTC Description.

Is DTC detected?

YES>>

GO TO 2.

NO>>

Inspection End.

CHECK CONNECTOR

  1. Ignition switch OFF.

  2. Check the automatic back door control unit harness connector for disconnection or looseness.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair/replace harness or connector, securely lock the connector..

CHECK AUTOMATIC BACK DOOR CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

Check the automatic back door control unit power supply and ground circuits. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair/replace harness, connector, fuse, or fusible link..

CHECK TERMINAL

  1. Ignition switch OFF.

  2. Disconnect automatic back door control unit harness connector and then check the automatic back door control unit pin terminals for damage or loose connection with harness connector.

Is the inspection result normal?

YES>>

Replace automatic back door control unit. Refer to Removal and Installation.

NO>>

Repair/replace harness, connector, or terminal.

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Nissan Pathfinder (R53) 2022-2025 Service Manual

Dtc/circuit Diagnosis (B2419-12 Open Switch ... B2428-54 Automatic Back Door Control Unit)

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