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Nissan Sentra B18 (2020-2025) Service Manual: B2fa9-11 Shift Position

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content)

DTC detecting condition

B2FA9-11

Shift position

(Shift position)

Diagnosis condition

Ignition switch ON

Signal (terminal)

P position signal

Threshold

When BCM detects the CVT shift selector (detent switch) circuit is open or shorted

Diagnosis delay time

1 second or more

POSSIBLE CAUSE

  • Harness or connectors

    [CVT shift selector (detent switch) circuit is open or shorted]

  • CVT shift selector (detent switch)

FAIL-SAFE

—

Confirmation Procedure

Confirmation Procedure

  1. PERFORM DTC CONFIRMATION PROCEDURE

    1. CONSULT

      1. Ignition switch ON.

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

    Is the 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 CVT SHIFT SELECTOR POWER SUPPLY

      1. Ignition switch OFF.

      2. Disconnect CVT shift selector (detent switch) connector.

      3. Check voltage between CVT shift selector (detent switch) harness connector and ground.

        (+)

        (–)

        Condition

        Voltage

        (Approx.)

        CVT shift selector (detent switch)

        Connector

        Terminal

        M38

        7

        Ground

        Ignition switch

        OFF (auto ACC status) or ON

        Battery voltage

        OFF (not auto ACC status)

        0 V

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    GO TO 2.

  2. CHECK CVT SHIFT SELECTOR POWER SUPPLY CIRCUIT

      1. Ignition switch OFF.

      2. Disconnect BCM connector.

      3. Check continuity between CVT shift selector (detent switch) harness connector and BCM harness connector.

        CVT shift selector (detent switch)

        BCM

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M38

        7

        M83

        64

        Yes

      4. Check continuity between CVT shift selector (detent switch) harness connector and ground.

        CVT shift selector (detent switch)

        —

        Continuity

        Connector

        Terminal

        M38

        7

        Ground

        No

    Is the inspection result normal?

    YES >>

    Inspection End.

    NO >>

    Repair or replace harness.

  3. CHECK CVT SHIFT SELECTOR CIRCUIT

      1. Ignition switch OFF.

      2. Disconnect BCM connector.

      3. Check continuity between CVT shift selector (detent switch) harness connector and BCM harness connector.

        CVT shift selector (detent switch)

        BCM

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M38

        8

        M83

        44

        Yes

      4. Check continuity between CVT shift selector (detent switch) harness connector and ground.

        CVT shift selector (detent switch)

        —

        Continuity

        Connector

        Terminal

        M38

        8

        Ground

        No

    Is the inspection result normal?

    YES>>

    GO TO 4.

    NO>>

    Repair or replace harness.

  4. CHECK CVT SHIFT SELECTOR (DETENT SWITCH)

    1. Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    Inspection End.

    NO >>

    Replace CVT shift selector. Refer to Removal and Installation.

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