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Nissan Sentra B18 (2020-2025) Service Manual: B2f73-23 Clutch Switch

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content)

DTC detecting condition

B2F73-23

Clutch switch

(Clutch switch)

Diagnosis condition

Driving distance of 20 km or more after starting the engine

Signal (terminal)

Clutch master cylinder (clutch switch) signal

Threshold

BCM detects that the Clutch master cylinder (clutch switch) signal is OFF input even though the clutch pedal is not depressed.

Diagnosis delay time

—

POSSIBLE CAUSE

  • Harness or connector

    (Clutch master cylinder (clutch switch) circuit is open or shorted)

  • Clutch master cylinder (clutch switch)

  • BCM

FAIL-SAFE

—

Confirmation Procedure

Confirmation Procedure

  1. PERFORM DTC CONFIRMATION PROCEDURE

    1. CONSULT

      1. Start the engine.

      2. Drive the Nissan Sentra vehicle more than 12 miles (20 km).

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

    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 FUSE

    1. Check that the following fuse is not blown (open):

      Signal name

      Fuse No.

      Capacity

      Ignition power supply

      5

      5 A

    Is the fuse blown (open)?

    YES >>

    Replace the blown (open) fuse after repairing the cause of blown (open).

    NO >>

    GO TO 2.

  2. CHECK CLUTCH MASTER CYLINDER (CLUTCH SWITCH) SIGNAL

      1. Ignition switch OFF.

      2. Disconnect BCM connector.

      3. Ignition switch ON.

      4. Check voltage between BCM harness connector and ground.

        (+)

        (–)

        Condition

        Voltage

        (Approx.)

        BCM

        Connector

        Terminal

        M142

        113

        Ground

        Clutch pedal is not depressed

        Battery voltage

        Clutch pedal is depressed

        0 V

    Is the inspection result normal?

    YES >>

    Replace BCM. Refer to Removal and Installation.

    NO >>

    GO TO 3.

  3. CHECK CLUTCH MASTER CYLINDER (CLUTCH SWITCH) POWER SUPPLY

      1. Ignition switch OFF.

      2. Disconnect clutch master cylinder (clutch switch) connector.

      3. Ignition switch ON.

      4. Check voltage between clutch master cylinder (clutch switch) harness connector and ground.

        (+)

        (–)

        Voltage

        (Approx.)

        Clutch master cylinder (clutch switch)

        Connector

        Terminal

        E32

        8

        Ground

        Battery voltage

    Is the inspection result normal?

    YES>>

    GO TO 4.

    NO>>

    Repair or replace harness.

  4. CHECK CLUTCH MASTER CYLINDER (CLUTCH SWITCH) CIRCUIT

      1. Ignition switch OFF.

      2. Check continuity between clutch master cylinder (clutch switch) harness connector and BCM harness connector.

        Clutch master cylinder (clutch switch)

        BCM

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        E32

        5

        M142

        113

        Yes

      3. Check continuity between clutch master cylinder (clutch switch) harness connector and ground.

        Clutch master cylinder (clutch switch)

        —

        Continuity

        Connector

        Terminal

        E32

        5

        Ground

        No

    Is the inspection result normal?

    YES >>

    GO TO 5.

    NO >>

    Repair or replace harness.

  5. CHECK CLUTCH MASTER CYLINDER (CLUTCH SWITCH) GROUND CIRCUIT

    1. Check continuity between clutch master cylinder (clutch switch) harness connector and ground.

      Clutch master cylinder (clutch switch)

      —

      Continuity

      Connector

      Terminal

      E32

      7

      Ground

      Yes

    Is the inspection result normal?

    YES >>

    Replace clutch master cylinder (clutch switch). Refer to Removal and Installation.

    NO >>

    Repair or replace harness.

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