17. Technicians need to be able to access a variety of information in order to diagnosis and repair faults on vehicles. What are the four (4) most common sources of information available? 1 2 3 18. What is a scan tool? 19. Name eight (8) capabilities the scan tools may have? 1 2 3 4 5 6 7 8 20. What is an engine analyser? 21. The internal losses in an engine are A. pumping losses B. brake losses C. combustion losses D. all of the mentioned 22. What information can an exhaust-gas analyser provide?