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Nissan Sentra B18 (2020-2025) Service Manual: Power Supply and Ground Circuit

Side Radar Lh

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE

    Check that the following fuse is not blown:

    Signal name

    Fuse No.

    Ignition power supply

    49 (10 A)

    Is the fuse blown?

    YES >>

    Replace the blown fuse after repairing the affected circuit.

    NO >>

    GO TO 2.

  2. CHECK POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.

    2. Disconnect the side radar LH connector.

    3. Check voltage between side radar LH harness connector and ground.

    Terminal

    Condition

    Voltage

    (Approx.)

    (+)

    (−)

    Side radar LH

    Ground

    Ignition switch

    Connector

    Terminal

    B253

    7

    OFF

    0 V

    ON

    Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Repair the side radar LH power supply circuit.

  3. CHECK GROUND CIRCUIT

    Check continuity between side radar LH harness connector and ground.

    Side radar LH

    Ground

    Continuity

    Connector

    Terminal

    B253

    9

    Yes

    Is the inspection result normal?

    YES >>

    Inspection End.

    NO >>

    Repair the side radar LH ground circuit.

Side Radar Rh

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE

    Check that the following fuse is not blown:

    Signal name

    Fuse No.

    Ignition power supply

    49 (10 A)

    Is the fuse blown?

    YES >>

    Replace the blown fuse after repairing the affected circuit.

    NO >>

    GO TO 2.

  2. CHECK POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.

    2. Disconnect the side radar RH connector.

    3. Check voltage between side radar RH harness connector and ground.

    Terminal

    Condition

    Voltage

    (Approx.)

    (+)

    (−)

    Side radar RH

    Ground

    Ignition switch

    Connector

    Terminal

    B254

    7

    OFF

    0 V

    ON

    Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Repair the side radar RH power supply circuit.

  3. CHECK GROUND CIRCUIT

    Check continuity between side radar RH harness connector and ground.

    Side radar RH

    Ground

    Continuity

    Connector

    Terminal

    B254

    9

    Yes

    Is the inspection result normal?

    YES >>

    Inspection End.

    NO >>

    Repair the side radar RH ground circuit.

Distance Sensor

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK DISTANCE SENSOR POWER SUPPLY CIRCUIT

    Check voltage between distance sensor harness connector and ground.

    (+)

    (–)

    Condition

    Standard voltage

    Voltage

    (Approx.)

    Distance sensor

    Ignition switch

    Connector

    Terminal

    E304

    8

    Ground

    OFF

    0 - 0.1 V

    0 V

    ON

    9.5 - 16 V

    Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    Repair the distance sensor power supply circuit.

  2. CHECK DISTANCE SENSOR GROUND CIRCUIT

    1. Turn the ignition switch OFF.

    2. Disconnect the distance sensor connector.

    3. Check for continuity between distance sensor harness connector and ground.

      Distance sensor

      Ground

      Continuity

      Connector

      Terminal

      E304

      1

      Yes

    Is the inspection result normal?

    YES >>

    Inspection End.

    NO >>

    Repair the distance sensor ground circuit.

Front Camera Unit

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSES

    Check if any of the following fuses are blown:

    Signal name

    Fuse No.

    Ignition power supply

    49(10A)

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    Replace the blown fuse after repairing the affected circuit if a fuse is blown.

  2. CHECK FRONT CAMERA UNIT POWER SUPPLY CIRCUIT

    Check voltage between front camera unit harness connector and ground.

    Terminal

    Condition

    Voltage

    (Approx.)

    (+)

    (–)

    Front camera unit

    Ground

    Ignition switch

    Connector

    Terminal

    R9

    1

    OFF

    0 V

    ON

    Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Repair the front camera unit power supply circuit.

  3. CHECK FRONT CAMERA UNIT GROUND CIRCUIT

    1. Turn the ignition switch OFF.

    2. Disconnect the front camera unit connector.

    3. Check for continuity between front camera unit harness connector and ground.

      Front camera unit

      Ground

      Continuity

      Connector

      Terminal

      R9

      10

      Existed

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Repair the front camera unit ground circuit.

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