Title: Verify idle control operation.
Course: Automotive Technology III (20104-III) > Section: Engine Performance: Fuel, Air Induction, and Exhaust Systems Diagnosis and Repair

Verification should include

- using a scan tool to perform output test for idle air control (IAC)
- comparing actual idle speed to target idle
- referring to service materials and manufacturer guidelines.

ASE Education Foundation
2017 Automobile Service Technology (AST) Level
VIII. Engine Performance
D. Fuel, Air Induction, and Exhaust Systems Diagnosis and Repair
Task 7

Process/Skill Questions:

- What are the differences in methods of idle speed control?
- What is a fly-by wire? What is ETC? (electronic throttle control)
- How does a stepper motor operate?