The struggle to find a correct pinout is a universal experience for anyone working with Denso ECUs.

Scattered across the internet are priceless pieces of pinout information:

Packages containing detailed pinout mappings by car type and ECU model are available, designed specifically to streamline ECU connections. Key Pinout Patterns in Denso ECUs

For reverse engineers and tuners, knowing the pinout is only half the battle. The best databases link physical pins to the internal architecture.