339 Copyright by Goodheart-Willcox Co., Inc. Technical Terms Chapter 14 Troubleshooting Electronic Control System Problems freeze frames gear skipping limp-in mode OBD I OBD II pattern failures scan tool snapshots testing by substitution titania-type oxygen sensor trouble codes zirconia-type oxygen sensor After studying this chapter, you will be able to: • Determine the exact nature of an electronic transmission/transaxle complaint. • Determine whether the problem is in the electronic control system. • Make visual checks for problems. • Retrieve trouble codes and match codes to problem areas. • Use scan tools and other test equipment to locate problem areas. • Use test equipment to test individual components. • Determine repair steps necessary to correct electronic transmission/transaxle defects.