Instructor: Dr. Mark Quarto

Course Length: 4 modules (each containing approximately 1 hour of instruction)

Course Handbooks Included: 1 digital copy per module

Learning Assessments: Post-lesson scored quizzes (one quiz per lesson) 

Certificates of Completion: One certificate of completion is provided to the participant after completing the training series lessons and learning assessments. Certificates remain available for download in user dashboard while the account is active.

Duration of Access: This course and its lessons, materials, and assessments will be available for 90 days after purchase. Certificates of completion will be available to the participant in their user dashboard while the account is active (even if not currently participating in any courses).

Recommended Concurrent Training: High Voltage Safety and PPE (#AODHVS010)

Short Abstract:

This course should be completed before servicing hybrid, plug-in and electric vehicles. These vehicles contain High Voltage DC and AC safety systems that are monitored by vehicle systems controllers that will maintain a safety barrier between the vehicle operator and the vehicle body/chassis to mitigate the possibility of electrical shock. This course will provide the technical information and background to know how these systems operate and effect vehicle operation and driveability.  Ford, GM, Honda, Lexus, Toyota and other popular products are featured in this course.

Course Objectives

By participating in this On Demand Course, you will be able to:

  • Identify High Voltage systems by color code
  • Recognize the construction and operation of Manual Disconnect systems
  • Know the location of the Manual Disconnect
  • Describe the operation of High Voltage Manual Disconnect systems
  • Identify Interlock Safety systems used on High Voltage systems by using circuit diagrams
  • Describe the operation of High Voltage Interlock systems


At the conclusion of this series, you will know the operation of vehicle High Voltage safety systems, how to test them, why they can cause a no-start condition, and how to test the system with special tools and Scan Tools to identify isolation fault areas for practical application.


Is this online training course for you?

The design and implementation of high voltage vehicle safety systems is a requirement for Technicians that work with vehicle electrification products.  This course will cover the varied safety systems found on contemporary vehicle electrification products, how these systems operate, applications on current products, failure mode effects, how the vehicle is effected, and the associated diagnostics when failure occur.  This course is applicable for any Technician with limited or some knowledge of high voltage vehicle electrification systems or those that need to update their current knowledge or just need a good refresher.   


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Course curriculum

  • 1

    Part 1

    • Part 1: Manual Disconnect and High Voltage Interlock Systems

    • Part 1: Manual Disconnect and High Voltage Interlock Systems Quiz

  • 2

    Part 2

    • Part 2: Active and Passive Bus Discharge Circuits

    • Part 2 Active and Passive Bus Discharge Systems Quiz

  • 3

    Part 3

    • Part 3: High Voltage Isolation Fault Circuits

    • Supplemental Video: Electric Machine Insulation Testing

    • Supplemental Video: Power Inverter Insulation Testing

    • Part 3: High Voltage Isolation Fault Systems Quiz

  • 4

    Part 4

    • Part 4: Insulation Meter Testing of High Voltage Components

    • Part 4: Insulation Meter Testing of High Voltage Components Quiz

About The Instructor

Dr. Mark Quarto

Dr. Mark Quarto is a Vehicle Electrification expert with over 40 years in the automotive industry. In addition to being an instructor and special consultant to FutureTech Auto, Dr. Quarto is the founder of Quarto Technical Services (QTS), which provides engineering services, diagnostic equipment, training, technical support, and consulting in Vehicle Electrification to all facets of the automotive industry.

Responsibilities include design and development of: diagnostic test equipment & software, management and technical education, curriculum and training programs, and technology innovations with solutions focused on Hybrid and Electric Vehicle Propulsion and Energy Management Systems. These unique diagnostic techniques and applications are effectively used globally supporting automotive aftermarket businesses.  

Other professional experience includes 28 years at General Motors Company with the last 16 years dedicated to Advanced Vehicle Engineering and as an Engineering Group Manager. Responsibilities included management, development of control and diagnostics systems, and service solutions for the Chevrolet Spark, Chevrolet Volt, Fuel Cell, Two-Mode Hybrid, Parallel Hybrid Truck (PHT), EV1 Electric Vehicle, S10 Electric Truck, and Alternative Fuel Systems Programs.  Prior 12 years included Service Training Development Manager and Resident Instructor in the technical training environment.  

Specialized Education includes a Doctorate in Technical Education from Nova Southeastern University, specialized in design, development, and technical education systems for hybrid and electric vehicles including high voltage energy and propulsion systems. Master’s Degree and two Bachelor Degrees all are in the areas of Electrical Engineering and Automotive Technology.