Nissan Rogue (T33) 2021-Present Service Manual: Dtc/circuit Diagnosis :: B2422-78 Back Door Position Abnormal

Nissan Rogue (T33) 2021-Present Service Manual / Body Exterior, Doors, Roof & Vehicle Security :: Door & Lock / Dtc/circuit Diagnosis :: B2422-78 Back Door Position Abnormal

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

DTC CONFIRMATION

CONSULT

  1. Ignition switch ON.

  2. Select “Self diagnosis result” mode of “AUTOMATIC BACK DOOR”.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

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

NO-2>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK ENCODER SIGNAL

CONSULT

  1. Ignition switch ON.

  2. Select “Spindle sensor LH” in “Data monitor” mode of "AUTOMATIC BACK DOOR".

  3. 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)

(Approx.)
Automatic back door control unit
Connector Terminal
B55 29 Ground Back door Moving (auto)

When stopped 0 V or Battery voltage
30 Moving (auto)

When stopped 0 V or Battery voltage

Is the inspection result normal?

YES>>

GO 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 touch sensor RH harness connector for disconnection or looseness.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair/replace harness or connector, securely lock the connector, and GO TO 6.

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 5.

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 touch sensor RH harness connector and check touch sensor RH 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. Disconnect automatic back door control unit connector and spindle unit LH 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 29 B95 5 Yes
    30 3

  3. 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.

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