Diagnostics and Maintenance

This course is designed to provide a comprehensive understanding of electric motor diagnostics and maintenance for battery electric vehicles (BEVs). Electric motors are a critical component of BEVs, and it is essential to have a strong knowledge of electric motor maintenance and repair to ensure the optimal performance and lifespan of the motor. This course provides an overview of Diagnostic Trouble Codes (DTC) and their relevance to BEVs. We discuss some common failures that affect BEV performance and the type of test equipment needed to test the failed components of a BEV. Finally, we present the kind of maintenance required on a BEV and the advantages and disadvantages of doing maintenance on a BEV compared to a gasoline vehicle. 

Note: The training in this course is general knowledge of servicing on a BEV. The service information for the vehicle you are working on should be read and followed before working on a BEV. 

This module will provide you with a foundational understanding of On-Board Diagnostics (OBD), encompassing its definition, purpose, and practical applications. We will delve into the historical evolution of OBD and explore its dynamic transformations over the years. Additionally, we will discuss the OBD-II standard in the automotive industry that addresses issues within vehicle systems.


  1. Definition and purpose of OBD 
  2. Brief History of OBD Development 
  3. OBD-II Standard & its Importance in the Automotive Service Industry 

This module will equip you with the inner workings of BEVs – from their unique features to the essential practices of monitoring and diagnosing potential issues. You may be familiar with some of the key features of gasoline-powered vehicles, such as two-pedal driving; however, as some BEVs are unique, you will notice they only have one-pedal driving. We will explore these and the other features that are unique to BEVs. While basic car maintenance is familiar territory, BEVs require a more proactive approach. We will delve into the essential components for effective battery monitoring in BEVs to ensure the battery packs’ safety, performance, and longevity. Finally, we will explore the importance of the live-dead-live test procedure and the steps involved in effectively disabling high-voltage systems to ensure the safety of technicians. 


  1. Unique Features of BEVs 
  2. Characteristics of Monitoring  
  3. Diagnostic Procedures for BEVs 

In this module, you will explore the communication networks and portals in BEVs, distinguish between various types of Onboard Diagnostics (OBD) scan tools, and examine the role of diagnostic tools in maintaining BEV safety. You will identify and differentiate between communication networks, their applications, and topologies in BEVs. Additionally, you will compare scan tool types and justify the preference for manufacturer-specific scan tools. Furthermore, you will investigate the National Fire Protection Association’s (NFPA) role, interpret category (CAT) ratings, and contrast digital multimeters (DMMs) and insulation meters. By the end of this module, you will have gained a comprehensive understanding of accessing OBD data in BEVs and the importance of diagnostic tools in ensuring the safe operation of these vehicles.


  1. Communication Networks and Portals in BEVs 
  2. OBD Scan Tools 
  3. Diagnostic Tools 

In this module, you will delve into the advantages of on-board diagnostics (OBD) for BEV owners and technicians, focusing on how OBD enables preventive maintenance, early issue detection, and streamlined troubleshooting processes. You will evaluate the unique maintenance requirements of BEVs, including the cooling system, 12-volt battery, and tires, and develop strategies to effectively utilize service information, technical service bulletins (TSBs), and diagnostic trouble code (DTC) charts to overcome challenges and optimize repair procedures.


  1. Preventive Maintenance and Early Detection of Issues 
  2. Streamlined Troubleshooting and Repair Processes 


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