Are you working on a specific vehicle brand, or are you trying to a unit for a custom project?
Switched voltage from Terminal 15. Activates the ECU main microprocessor. Pin 44
for flashing (especially if it's "bricked" or locked), you often need to manipulate specific internal resistors or use specialized cables like the M7.9.7 (Standard):
The Bosch M7.9.7 ECU uses a high-density, multi-pin connector divided into two main physical blocks or harness plugs. These are typically split into a smaller 21-pin block and a larger 60-pin block, totaling an 81-pin configuration. bosch m797 pinout better
When a standard OBD read fails or when performing a complete EEPROM/Flash cloning procedure, technicians force the microprocessor into . The M7.9.7 series features an ST10F275 microcontroller core architecture.
The is one of the most prolific Electronic Control Units (ECUs) found in early-to-mid 2000s vehicles, particularly those from Lada, Kia, Hyundai, and various Chinese manufacturers. While robust, accessing a "better" or more detailed pinout for this 81-pin system is essential for engine swaps, tuning, troubleshooting, or direct-mode flashing.
If your vehicle doesn't match the list above, use this reverse-engineering methodology. It is the only way to guarantee a result than random forum posts. Are you working on a specific vehicle brand,
Your bench power supply clicks off at 2A.
Bosch ME7.9.7 (found in Chery/Polaris) may have two different hardware layouts (HW1 and HW2), which change the exact location of the internal boot pads. Helpful Resources
Usually pins 4, 5, or 6, commonly found near the power pins. Pin 44 for flashing (especially if it's "bricked"
I’ll assume you mean the Bosch M797 (immobilizer/ECU or connector) pinout and want a concise review plus pinout clarity—here’s a focused summary and practical guidance.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Bosch ME7.9.7 Chery ECU Pinout Guide | PDF - Scribd
Use two 680-ohm resistors to bridge the designated boot pads to the system ground rail on the PCB. This forces the hardware configuration pins low upon startup.
The following table outlines the key pin assignments for the 81-pin connector, including vital power, ground, sensor inputs, and actuator outputs based on common configurations: Bosch M7.9.7 ECU Pinout Guide | PDF - Scribd