This module covers PIP and spout signal interaction within the TFI-4 system, including how their waveform relationship changes with RPM and timing advance across both push start and CCD designs.

Common failure modes are examined in depth, including heat-related module failures, pickup-induced PIP disruptions, and how to distinguish between a faulty ICM and a faulty distributor pickup. A DIY pickup tester tool is introduced as a practical solution for isolating the root cause without guesswork.

The module also addresses the magnetized distributor shaft theory and explains why it is a myth, then wraps up with an introduction to the Low Data Rate Distributorless Ignition System (LDR DIS), covering:

• System components and their responsibilities (ICM, PCM, crank and cam sensors)
• PIP and CID signal characteristics
• Computer-controlled dwell and timing
• IDM signal behavior and its diagnostic role
• Dual plug inhibit operation on the 2.3 dual plug engine