Audio-Visual Resources:

• Slides:  95
• Video:  111 minutes

Approximate length: 8 hours

CAAT Seal or Certificate available upon following quality assurance standards

Learn to use the data of the on-board diagnostic systems to solve driveabilty problems. Perform diagnostic testing procedures on computers and typical sensor fault modes. Understand the operation of individuals sensors and how they affect spark timing and fuel management. Be able to differentiate between a computer problem and an engine integrity problem.

• Purpose and benefits of computer control systems
• Computer construction and function
  • Inputs — sensor and switched inputs (pull-up and pull-down circuits)
  • Controlled Components
• Computerized Fuel Management
  • Closed loop / open loop / adaptive modes
  • Fuel control solenoids (carburetion and fuel injection)
• Computerized Air Management
  • Air pump / pulse-air aspirator systems
  • Control, switching and diversion functions
• Fault Diagnosis
  • On-board diagnostics
  • Testing logic