Ensure you have the necessary permissions and access to the Teradata database. Install any required Teradata utilities or clients like BTEQ, FastLoad, or SQL Assistant on your machine to facilitate direct interaction with the database.

Check your CSV file for any inconsistencies or errors. Ensure that the CSV is properly formatted, with headers if applicable. Clean any unwanted characters or data that might interfere with the loading process. Save the file in a location accessible by your Teradata client utilities.

Using a Teradata client like SQL Assistant or BTEQ, write and execute a SQL script to create a table in Teradata that matches the structure of your CSV file. Define the appropriate data types and ensure that all necessary columns are included.

```sql
CREATE TABLE your_table_name (
column1_name DATA_TYPE,
column2_name DATA_TYPE,
...
);
```

Use the BTEQ utility to load data from the CSV into Teradata. You can write a BTEQ script that reads your CSV file and inserts the data into the Teradata table. This involves using the `.IMPORT` command to specify the file and `.REPEAT` to iterate over each line.

Example BTEQ script:
```sql
.LOGON your_database/username,password;
.SET RECORDMODE OFF;
.IMPORT VARTEXT ',' FILE=your_csv_file_path;

.REPEAT
USING
(column1_name DATA_TYPE, column2_name DATA_TYPE, ...)
INSERT INTO your_table_name
VALUES (:column1_name, :column2_name, ...);

.LOGOFF;
```

For smaller data sets, you can manually load the CSV into Teradata using SQL Assistant. Open SQL Assistant, connect to your database, and use the import feature to load the CSV file data directly into the respective table. This method is more manual but effective for small files.

After loading the data, run queries on your Teradata table to verify that the data has been loaded correctly. Check for the correct number of rows and inspect sample data points to ensure accuracy. Use SQL queries to compare counts and values between your CSV and the Teradata table.

```sql
SELECT COUNT() FROM your_table_name;
```

Monitor the load process for any errors or exceptions. If errors occur, review the BTEQ logs or SQL Assistant output to diagnose issues such as data type mismatches or improperly formatted data. Correct any problems in the CSV file or table definition and repeat the loading process if necessary.

By following these steps, you can effectively transfer data from a CSV file into a Teradata database without relying on third-party tools or integrations.