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Nissan Sentra B18 (2020-2025) Service Manual: Brake Pedal Position Switch

Component Function Check

Component Function Check

  1. CHECK BRAKE PEDAL POSITION SWITCH FUNCTION

    With CONSULT

    1. Turn ignition switch ON.

    2. Select “BRAKE SW” in “DATA MONITOR” mode of “ENGINE” with CONSULT.

    3. Check “BRAKE SW” indication as per the following conditions.

      Monitor item

      Condition

      Indication

      BRAKE SW 1

      Brake pedal

      Slightly depressed

      OFF

      Fully released

      ON

    Without CONSULT

    1. Turn ignition switch ON.

    2. Check the voltage between ECM harness connector terminals as per the following.

      ECM

      Condition

      Voltage

      (Approx.)

      Connector

      +

      –

      Terminal

      E16

      150

      162

      Brake pedal

      Slightly depressed

      0 V

      Fully released

      Battery voltage

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK BRAKE PEDAL POSITION SWITCH CIRCUIT

    With CONSULT

    1. Turn ignition switch ON.

    2. Select “BRAKE SW 1” in “DATA MONITOR” mode of “ENGINE” with CONSULT.

    3. Check “BRAKE SW 1” indication as per the following conditions.

      Monitor item

      Condition

      Indication

      BRAKE SW 1

      Brake pedal

      Slightly depressed

      OFF

      Fully released

      ON

    Without CONSULT

    1. Turn ignition switch ON.

    2. Check the voltage between ECM harness connector terminals as per the following.

      ECM

      Condition

      Voltage

      (Approx.)

      Connector

      +

      –

      Terminal

      E16

      150

      162

      Brake pedal

      Slightly depressed

      0 V

      Fully released

      Battery voltage

    Is the inspection result normal?

    YES >>

    Check intermittent incident. Refer to Intermittent Incident.

    NO >>

    GO TO 2.

  2. CHECK BRAKE PEDAL POSITION SWITCH POWER SUPPLY CIRCUIT

    1. Turn ignition switch ON.

    2. Disconnect brake pedal position switch harness connector.

    3. Turn ignition switch ON.

    4. Check the voltage between brake pedal position switch harness connector and ground.

      +

      −

      Voltage

      Brake pedal position switch

      Connector

      Terminal

      E84

      1

      Ground

      Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Perform trouble diagnosis for power supply circuit.

  3. CHECK BRAKE PEDAL POSITION SWITCH INPUT SIGNAL CIRCUIT

    1. Disconnect ECM harness connector.

    2. Check the continuity between brake pedal position switch harness connector and ECM harness connector.

      Brake pedal position switch

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E84

      2

      E16

      150

      Existed

    3. Also check harness for short to ground and to power.

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Repair or replace malfunctioning part.

  4. CHECK BRAKE PEDAL POSITION SWITCH

    Check brake pedal position switch. Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    Check intermittent incident. Refer to Intermittent Incident.

    NO >>

    Replace brake pedal position switch. Refer to Removal and Installation.

Component Inspection

Component Inspection

  1. CHECK BRAKE PEDAL POSITION SWITCH-1

    1. Turn ignition switch OFF.

    2. Disconnect brake pedal position harness connector.

    3. Check the continuity between brake pedal position switch terminals as per the following conditions.

      Brake pedal position switch

      Condition

      Continuity

      Terminal

      1

      2

      Brake pedal

      Fully released

      Existed

      Slightly depressed

      Not existed

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    GO TO 2.

  2. CHECK BRAKE PEDAL POSITION SWITCH-2

    1. Adjust brake pedal position switch installation. Refer to Removal and Installation.

    2. Check the continuity between brake pedal position switch terminals as per the following conditions.

      Brake pedal position switch

      Condition

      Continuity

      Terminal

      1

      2

      Brake pedal

      Fully released

      Existed

      Slightly depressed

      Not existed

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Replace brake pedal position switch. Refer to Removal and Installation.

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