Dedicated pins for OBD-II (K-Line/CAN) diagnostic links and microprocessor communication (e.g., for reading/writing firmware).
Before diving into databases, we must understand the physical reality of the ECU. A Denso ECU (such as the 89661, 89666, or 275800 series) connects to the vehicle’s wiring harness via two or three large multi-pin connectors (usually labeled A, B, and C, or E5, E6, E7). denso ecu pinout database
To help find the exact wiring diagram or bench layout for your project, please share a few more specifics. Dedicated pins for OBD-II (K-Line/CAN) diagnostic links and