Thought Leadership

Transforming Automotive Diagnostics: An Offline Inbuilt Chatbot with Trained Data

24 Apr, 2023


This white paper proposes an offline chatbot solution for vehicle diagnostics that uses machine learning algorithms to diagnose vehicle problems accurately and efficiently. The chatbot is trained using a dataset of diagnostic codes and their associated recommendations. The system is integrated into the vehicle as part of the infotainment system. We discuss the required hardware and software specifications for this system in this paper. The trained model can be deployed as embedded C or C++ application in the vehicle. Offline chatbot system enables faster diagnostics as it enables quick access to diagnostic data for technicians.

Keywords: Chatbot, Machine Learning


The automotive industry is constantly evolving, with advancements in technology making vehicles more complex than ever before. As a result, diagnosing vehicle problems has become increasingly difficult, requiring specialized knowledge and skills. To address this challenge, there is a need for innovative solutions that can accurately and efficiently diagnose vehicle issues. One such solution is an offline chatbot for vehicle diagnostics, which uses machine learning algorithms to provide accurate and efficient diagnostic results. This white paper proposes such a solution, which is designed to be integrated into the vehicle itself and offers significant benefits over traditional diagnostic methods. In this paper, we will describe the proposed solution in detail, including its architecture, implementation, and benefits, as well as real-world examples of successful diagnoses.

System Overview

Figure 1: Offline Chatbot system overview

The proposed system is an integrated, offline chatbot solution for vehicle diagnostics. Its purpose is to diagnose vehicle issues accurately and efficiently by using machine learning algorithms trained on a dataset of diagnostic codes and their recommended solutions. To operate, the system requires specific hardware and software components, including a microcontroller unit, memory, and an operating system. The chatbot interacts with the user via a user interface, such as a touchscreen display or voice recognition, and communicates the diagnosis results and recommended solutions.

  • Hardware specification:

To operate the chatbot solution, the system requires a microcontroller unit (MCU) capable of running the chatbot’s algorithms and data. For this application, a recommended MCU is the ARM Cortex-M series, with sufficient processing power and memory. In addition, the system has a minimum memory capacity of 512KB of flash memory and 128KB of RAM to store the chatbot application, diagnostic codes, and associated recommendations. To interact with the user, the chatbot requires a user interface, which can be achieved through a touchscreen display.

  • Software specification:

The system has FreeRTOS operating system that is compatible with the chosen MCU. The chatbot application is programmed in C programming language. We have used Scikit-learn for development of the chatbot’s machine learning algorithms.

Model development and training process

Figure 2: Model training process

The proposed system’s training data and machine learning process consist of the following steps:

  • Diagnostic Data Collection: The first step involves gathering diagnostic data from various sources, including manufacturer manuals, expert technicians, and online databases. This data comprises diagnostic codes and their corresponding recommendations
  • Data Pre-processing: The collected data undergoes pre-processing to remove noise, inconsistencies, and irrelevant information. This step entails cleaning, normalization, and transformation of the data.
  • Machine Learning Model Training: The pre-processed data is used to train a machine learning model capable of accurately predicting vehicle problems based on the diagnostic codes. The model may be trained using supervised or unsupervised learning algorithms, such as decision trees, support vector machines, or neural networks.
  • Model Validation and Testing: The trained machine learning model is validated and tested using a separate set of data not utilized in the training process. This step ensures the model’s accuracy and reliability in predicting vehicle problems.
  • Model Deployment: The final step involves deploying the trained machine learning model into the vehicle hardware.

Benefits of offline chatbot system

The chatbot system for vehicle diagnostics has several advantages over traditional diagnostic methods. It provides accurate and efficient diagnoses, which can lead to faster repairs and reduced downtime for the vehicle owner. The chatbot can also offer recommendations for repairs or maintenance, potentially saving the owner money on unnecessary repairs.

Real-world scenarios where the chatbot has successfully diagnosed and resolved vehicle issues include:

  • A driver experiencing engine trouble while on a long road trip uses the chatbot to diagnose the problem and make necessary repairs before it worsens.
  • A fleet manager uses the chatbot to perform routine maintenance checks, detecting potential issues early and preventing costly breakdowns.
  • A mechanic uses the chatbot to diagnose a complex issue, saving time and reducing the need quickly and accurately for trial-and-error troubleshooting.

Overall, the offline chatbot system for vehicle diagnostics is a valuable tool for both vehicle owners and professionals in the automotive industry. Its accuracy, efficiency, and ease of use make it an asset for diagnosing and resolving vehicle problems.


To summarize, the offline chatbot solution for vehicle diagnostics provides an accurate and efficient method for diagnosing vehicle problems. Using machine learning algorithms and a trained dataset of diagnostic codes, the chatbot can quickly and effectively provide diagnosis results and recommended solutions. The implementation and deployment process are straightforward, and the system can be easily integrated into a vehicle’s hardware and software.

The offline chatbot system offers numerous benefits, such as improved accuracy and efficiency, reduced costs, and improved customer satisfaction. Overall, the offline chatbot system for vehicle diagnostics is a promising technology that can significantly enhance the vehicle repair and maintenance process.

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