Pin 71 (this is your communication line for diagnostics and flashing). Bench Flashing and the "Plus" Difference
To quickly verify if an ECU is alive on a test bench, supply +12V to the main power pins and check for 5V at the filtering capacitors near the main memory chips. If this 5V rail reads flat or experiences drops, the voltage regulator IC has failed.
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 M 7.9.7 ECU Pinout Guide | PDF - Scribd bosch m797 pinout better
Solder a 1.0k Ohm to 4.7k Ohm resistor between the boot pad (connected to Pin 104 of the ST10 processor) and a steady internal circuit board Ground point.
For diagnostics and bench-flashing (boot mode), specific communication lines are required: Pin 71 (this is your communication line for
To enter programming mode, a hardware modification is required. One method involves soldering an SMD resistor (typically 5-8 kOhm) to specific points on the PCB. Alternatively, must be connected directly to ground during the power-up sequence to force the ECU into its reprogramming state. After a successful flash, the standard diagnostic connector's K-Line is connected to the programming tool's K-Line interface.
| Pin | Typical Wire Color | Cross-section | |-----|--------------------|----------------| | 13 | Red or Red/Black | 2.5 mm² | | 14 | Red/Yellow | 2.5 mm² | | 19 | Brown | 4.0 mm² | | 20 | Black/Yellow | 0.5 mm² | | 7 | Orange/Black | 0.35 mm² | | 8 | Orange/Brown | 0.35 mm² | | 9 | White/Yellow or White/Violet | 0.35 mm² | This public link is valid for 7 days
Pinout testing cannot bypass a digital immobilizer mismatched handshake. If performing an engine swap or ECU replacement, you must either transfer the matching EEPROM security data or flash an "Immo-Off" file into the flash memory via Boot Mode.
Are you troubleshooting an , or trying to perform a bench flash/recovery ? Share public link