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Nissan Sentra B18 (2020-2025) Service Manual: B20be-11 Battery Temperature Sensor

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content)

DTC Detection Condition

B20BE–11

BATTERY TEMPERATURE SENSOR

(Battery temperature sensor)

Diagnosis condition

When ignition switch is ON.

Signal (terminal)

Battery temperature sensor signal

Threshold

Battery temperature sensor circuit is shorted to ground.

Diagnosis delay time

5 seconds or more.

POSSIBLE CAUSE

  • Harness or connectors

    • Battery current sensor input signal (temperature) circuit is shorted (Ground)

  • Battery current sensor

FAIL-SAFE

Confirmation Procedure

Confirmation Procedure

  1. PERFORM COMPONENT FUNCTION CHECK

    1. CONSULT

      1. Ignition ON, and wait for 5 seconds or more.

      2. Select “Self Diagnostic Result” mode of “IPDM E/R”.

    Is the inspection result normal?

    YES>>

    To check malfunction symptom before repair: Refer to Intermittent Incident.

    YES>>

    Confirmation after repair: Inspection End.

    NO>>

    Refer to DTC Diagnosis Procedure.

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK BATTERY CURRENT SENSOR POWER

      1. Ignition switch OFF.

      2. Disconnect battery current sensor connector.

      3. Ignition switch ON.

      4. Check the voltage between battery current sensor harness connector and ground.

        (+)

        (-)

        Voltage

        (Approx.)

        Battery current sensor

        Connector

        Terminal

        E39

        4

        Ground

        4 – 6 V

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    GO TO 2.

  2. CHECK BATTERY CURRENT SENSOR POWER CIRCUIT

      1. Ignition switch OFF.

      2. Disconnect IPDM E/R connector.

      3. Check the continuity between battery current sensor harness connector and IPDM E/R harness connector.

        Battery current sensor

        IPDM E/R

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        E39

        4

        F98

        95

        Yes

      4. Check the continuity between battery current sensor harness connector and ground.

        Battery current sensor

        Continuity

        Connector

        Terminal

        E39

        4

        Ground

        No

    Is the inspection result normal?

    YES >>

    Replace IPDM E/R. Refer to Removal and Installation.

    NO >>

    Repair or replace harness.

  3. CHECK BATTERY CURRENT SENSOR GROUND

      1. Ignition switch OFF.

      2. Check the continuity between battery current sensor harness connector and ground.

        Battery current sensor

        Continuity

        Connector

        Terminal

        E39

        2

        Ground

        Yes

    Is the inspection result normal?

    YES >>

    GO TO 5.

    NO >>

    GO TO 4.

  4. CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT

      1. Disconnect IPDM E/R connector.

      2. Check the continuity between battery current sensor harness connector and IPDM E/R harness connector.

        Battery current sensor

        IPDM E/R

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        E39

        2

        F98

        96

        Yes

      3. Check the continuity between battery current sensor harness connector and ground.

        Battery current sensor

        Continuity

        Connector

        Terminal

        E39

        2

        Ground

        No

    Is the inspection result normal?

    YES >>

    Replace IPDM E/R. Refer to Removal and Installation.

    NO >>

    Repair or replace harness.

  5. CHECK BATTERY TEMPERATURE INPUT SIGNAL CIRCUIT 1

      1. Disconnect IPDM E/R connector.

      2. Check the continuity between battery current sensor harness connector and ground.

        Battery current sensor

        Continuity

        Connector

        Terminal

        E39

        3

        Ground

        No

    Is the inspection result normal?

    YES >>

    GO TO 6.

    NO >>

    Repair or replace harness.

  6. CHECK BATTERY CURRENT SENSOR

    1. Refer to Component Inspection.

    Is the inspection result normal?

    YES>>

    Refer to Intermittent Incident. If the inspection result of the connector is normal then replace IPDM E/R. Refer to Removal and Installation.

    NO>>

    Replace battery current sensor. Refer to Removal and Installation.

Component Inspection

Component Inspection

  1. CHECK BATTERY TEMPERATURE SENSOR

      1. Ignition switch OFF.

      2. Disconnect battery current sensor connector.

      3. Check the resistance between battery current sensor terminals.

        Battery current sensor

        Resistance

        Terminals

        2

        3

        Continuity exists and the resistance value is 100 Ω or more

        Before measuring the terminal voltage, confirm that the battery is fully charged.

    Is the inspection result normal?

    YES >>

    Inspection End.

    NO >>

    Replace battery current sensor.

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