A free, peer-reviewed automotive textbook for students and instructors to share.

Simply click on the ASE area in the menu (located on the upper right portion of this page) to find a table of contents of all listed topics.  If the topic is highlighted, there is a downloadable PDF containing the content.

  • A1 – Engine Repair
  • A2 – Automatic Transmission/Transaxle
  • A3 – Manual Drive Train & Axles
  • A4 – Suspension & Steering
  • A5 – Brakes
  • A6 – Electrical/Electronic Systems
  • A7 – Heating & Air Conditioning
  • A8 – Engine Performance
  • A9 – Light Vehicle Diesel Engines

A list of authors and peer reviewers are indicated in each downloadable pdf.  Any questions regarding the content should be directed to

As an add-on, there is also a generic PCM schematic where you can click between inputs, outputs, and processes to learn about powertrain control.

You can also find a variety of online lectures recorded with Office Mix by clicking HERE.