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Nissan Sentra B18 (2020-2025) Service Manual: B24f5-93 Mode Door Motor

Dtc Description

DTC Description

DTC DETECTION LOGIC

Note:

If all of door motors DTC (B24F5-93, B24F6-93, B24F7-93) are detected, check “DOOR MOTOR CIRCUIT”. Refer to Diagnosis Procedure.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

B24F5-93

Mode door motor

(Mode door motor)

Diagnosis condition

Ignition switch ON

Signal (Terminal)

LIN (Door motor) signal

Threshold

Drive error of mode door motor is detected

Diagnosis delay time

2 seconds or more

POSSIBLE CAUSE

  • Harness and connector (mode door motor circuit is open or shorted to ground)

  • Mode door motor installation condition

  • Mode door motor

  • A/C amp.

FAIL-SAFE

—

Confirmation Procedure

Confirmation Procedure

  1. PERFORM DTC CONFIRMATION PROCEDURE

    1. CONSULT

      1. Ignition switch ON.

      2. Select “Self Diagnostic Result” mode of “HVAC”.

      3. Check DTC.

    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

DTC Diagnosis Procedure

  1. CHECK MODE DOOR MOTOR POWER SUPPLY

      1. Ignition switch ON.

      2. Check voltage between mode door motor harness connector and ground.

        +

        -

        Voltage

        (Approx.)

        Mode door motor

        Connector

        Terminal

        M166

        1

        Ground

        Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    GO TO 5.

  2. CHECK MODE DOOR MOTOR GROUND CIRCUIT FOR OPEN

      1. Ignition switch OFF.

      2. Disconnect mode door motor connector.

      3. Check continuity between mode door motor harness connector and ground.

        Mode door motor

        —

        Continuity

        Connector

        Terminal

        M166

        2

        Ground

        Yes

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Repair harness or connector.

  3. CHECK MODE DOOR MOTOR LIN SIGNAL CIRCUIT

      1. Connect mode door motor connector.

      2. Ignition switch ON.

      3. Confirm output waveform between mode door motor harness connector and ground with oscilloscope.

        +

        -

        Output waveform

        Mode door motor

        Connector

        Terminal

        M166

        3

        Ground

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    GO TO 6.

  4. CHECK INSTALLATION OF MODE DOOR MOTOR

    1. Check mode door motor is properly installed. Exploded View.

    Is the inspection result normal?

    YES >>

    Replace mode door motor. Refer to Removal and Installation.

    NO >>

    Repair or replace malfunctioning part.

  5. CHECK MODE DOOR MOTOR POWER SUPPLY CIRCUIT FOR OPEN

      1. Ignition switch OFF.

      2. Disconnect mode door motor connector and A/C amp. connector.

      3. Check continuity between mode door motor harness connector and A/C amp. harness connector.

        Mode door motor

        A/C amp.

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M166

        1

        M81

        1

        Yes

    Is the inspection result normal?

    YES >>

    Replace A/C amp. Refer to Removal and Installation.

    NO >>

    Repair harness or connector.

  6. CHECK MODE DOOR MOTOR LIN SIGNAL CIRCUIT FOR OPEN

      1. Ignition switch OFF.

      2. Disconnect mode door motor connector and A/C amp. connector.

      3. Check continuity between mode door motor harness connector and A/C amp. harness connector.

        Mode door motor

        A/C amp.

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M166

        3

        M81

        22

        Yes

    Is the inspection result normal?

    YES >>

    Replace A/C amp. Refer to Removal and Installation.

    NO >>

    Repair harness or connector.

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