One of the most feared sections for many techs is Mode $06 (On-Board Diagnostic Test Results). The Ford engineering manual demystifies the Test IDs (TIDs) and Component IDs (CIDs), translating hexadecimal nonsense into readable pass/fail metrics for catalyst monitors and EGR systems.
Utilize the Controller Area Network (CAN) bus for direct communication. Ford Diagnostic Engineering Tool Manual
The is strictly internal. This guide summarizes its purpose, capabilities, and operational boundaries. If you are a Ford engineer, refer to your internal technical library for the latest manual version. If you are a DIYer or independent technician, FORScan or FDRS will cover nearly all diagnostic and programming needs without requiring FDET access. One of the most feared sections for many