Before starting the data transfer, ensure you have access to both the CSV file and the Teradata Vantage system. Install the Teradata Tools and Utilities (TTU) package on your machine, which includes necessary utilities like BTEQ and FastLoad. Also, confirm that you have the necessary permissions to create and load tables in Teradata.

Log into Teradata using BTEQ or SQL Assistant. Create a table in Teradata that matches the schema of your CSV file. Ensure the data types in Teradata are compatible with the CSV data types. For example, strings in CSV should be translated to VARCHAR in Teradata, and numeric fields should match appropriately.

```sql
CREATE TABLE target_table (
column1 VARCHAR(100),
column2 INTEGER,
column3 DATE
);
```

Ensure your CSV file is clean and formatted correctly. Remove any inconsistent data, empty lines, or headers that could disrupt the import process. Save the file in a location that is accessible for the file transfer process. If necessary, use a text editor to make these adjustments.

FastLoad is a command-line utility provided by Teradata for high-speed data loading. Create a FastLoad script to specify the loading process. The script should include the file path, data format, and target table details.

```plaintext
.LOGON your_teradata_server/username,password;
DATABASE your_database;
BEGIN LOADING target_table ERRORFILES error1, error2;
DEFINE
column1 (VARCHAR(100)),
column2 (INTEGER),
column3 (DATE)
FILE= 'path_to_your_csv_file.csv';
INSERT INTO target_table
VALUES
(:column1, :column2, :column3);
END LOADING;
.LOGOFF;
```

Run the FastLoad script from the command line. Navigate to the directory where the script is located and execute it using the FastLoad command. Monitor the output to ensure that the data is loaded without errors.

```bash
fastload < your_fastload_script.txt
```

After the data load is complete, verify the data integrity by querying the target table in Teradata. Check for the correct number of records and validate that the data matches what was in the CSV file. Use SQL queries to perform these verifications.

```sql
SELECT COUNT(*), MIN(column1), MAX(column2) FROM target_table;
```

Once the data load is verified, perform any necessary cleanup, such as removing staging tables or temporary files. Consider collecting statistics on the new table to optimize query performance. This can be done using the `COLLECT STATISTICS` statement in Teradata.

```sql
COLLECT STATISTICS ON target_table INDEX (column1);
```

By following these steps, you can efficiently move data from a CSV file to Teradata Vantage without relying on third-party connectors or integrations.