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Nissan Sentra B18 (2020-2025) Service Manual: B2c95-01 Combination Switch

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content)

DTC Detection Condition

B2C95-01

Combination switch

(Combination switch)

Diagnosis condition

Ignition switch OFF (auto ACC status)

Signal (terminal)

Combination switch signal

Threshold

Combination switch circuit short to battery

Diagnosis delay time

2 seconds or more

POSSIBLE CAUSE

  • Harness or connector (combination switch circuit is shorted to battery)

  • Combination switch

  • BCM

FAIL-SAFE

Headlamp ON (low beam)

Dtc Confirmation Procedure

DTC Confirmation Procedure

  1. DTC CONFIRMATION

    1. CONSULT

      1. Erase DTC.

      2. Ignition switch OFF.

      3. Select “Self Diagnostic Result” mode of "BCM", when 2 seconds or more has passed after the ignition switch is placed OFF (auto ACC status).

    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 COMBINATION SWITCH CIRCUIT SHORT TO BATTERY

      1. Ignition switch OFF.

      2. Disconnect combination switch connector and BCM connector M83.

      3. Check voltage between combination switch harness connector and ground.

        +

        –

        Voltage

        (Approx.)

        Combination switch

        Connector

        Terminal

        M28

        1

        Ground

        0 V

        3

        4

        6

        8

        13

        7

        15

        10

        5

        2

        12

    Is the inspection result normal?

    YES>>

    GO TO 2.

    NO>>

    Repair or replace harness or connectors.

  2. PERFORM “DATA MONITOR” OF BCM (COMB SW)

    1. CONSULT

      Select “Data Monitor” mode of "BCM(COMB SW)" to check for any malfunctioning item. Refer to Symptom Table.

    Is the inspection result normal?

    YES >>

    Replace combination switch. Refer to Removal and Installation.

    NO >>

    Replace BCM. Refer to Removal and Installation.

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