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Nissan Sentra B18 (2020-2025) Service Manual: Dtc Diagnosis Procedure

Nissan Sentra B18 (2020-2025) Service Manual / Steering / Steering System :: Dtc/circuit Diagnosis / B24f4-14 Steering Heater Relay / Dtc Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK FUSE

      1. Ignition switch OFF.

      2. Check that any of the following fuse is not blown (open):

        Signal name

        Fuse No.

        Capacity

        Ignition ON power supply

        6

        10 A

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    Replace the blown fuse after repairing the affected circuit.

  2. CHECK HEATED STEERING WHEEL RELAY POWER SUPPLY

      1. Disconnect heated steering wheel relay connector.

      2. Ignition switch ON.

      3. Check voltage between heated steering wheel relay harness connector and ground.

        (+)

        (-)

        Voltage

        (Approx.)

        Heated steering wheel relay

        Connector

        Terminal

        M75

        1

        Ground

        Battery voltage

    Is the inspection result normal?

    YES>>

    GO TO 3.

    NO>>

    Repair or replace harness.

  3. CHECK HEATED STEERING WHEEL RELAY

    1. Check heated steering wheel relay.

      Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Replace heated steering wheel relay.

  4. CHECK HEATED STEERING WHEEL RELAY CONTROL SIGNAL

      1. Ignition switch OFF.

      2. Connect heated steering wheel relay connector.

      3. Ignition switch ON.

      4. Check voltage between A/C auto amp. harness connector and ground.

        (+)

        (–)

        Condition

        Voltage

        (Approx.)

        A/C auto amp.

        Connector

        Terminal

        M34

        56

        Ground

        Heated steering wheel relay

        OFF

        Battery voltage

        ON

        0 - 0.5 V

    Is the inspection result normal?

    YES >>

    Replace A/C auto amp. Refer to Removal and Installation.

    NO >>

    GO TO 5.

  5. CHECK HEATED STEERING WHEEL RELAY CONTROL SIGNAL CIRCUIT

      1. Ignition switch OFF.

      2. Disconnect A/C auto amp. connector and heated steering wheel relay connector.

      3. Check continuity between A/C auto amp. harness connector and heated steering wheel relay harness connector.

        A/C auto amp.

        Heated steering wheel relay

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M34

        56

        M75

        2

        Yes

      4. Check continuity between A/C auto amp. harness connector and ground.

        A/C auto amp.

        –

        Continuity

        Connector

        Terminal

        M34

        56

        Ground

        No

    Is the inspection result normal?

    YES >>

    GO TO 6.

    NO >>

    Repair or replace harness.

  6. CHECK INTERMITTENT INCIDENT

    1. Check intermittent incident.

      Refer to Intermittent Incident.

    >>

    Inspection End.

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...

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