If entering Boot Mode, turning on the power supply before grounding the boot pin will fail to initialize the recovery mode. The ground must be present during the initial power-up.
A serial 95320 SPI EEPROM chip . This chip holds vehicle-specific, non-volatile data such as the Vehicle Identification Number (VIN), odometer synchronization parameters, and immobilizer (security) crypto keys.
In instances where the original ECU data is completely lost, a software patch can be applied to the donor EEPROM file to permanently disable the immobilizer request. Keep in mind that a permanent Immo Off on Bosch ME7.4.5 sometimes results in a persistent cooling fan fault or an error message on the dashboard screen depending on the specific firmware version used. Best Practices and Safety Tips me7.4.5 pinout
| Pin / Location | Signal | Usage | |---|---|---| | A3 (Black Connector) | CAN-H | Engine CAN bus line (high) | | A4 (Black Connector) | CAN-L | Engine CAN bus line (low) | | B4 (Black Connector) | K-Line | K-Line for diagnostics | | F4 (Black Connector) | +12V ACC | Switched ignition power (Accessory) | | H2 (Black Connector) | +12V Main | Main battery power to ECU | | Various (Pins G1, G4, H1, H4) | GND | Battery negative / Chassis ground | | Boot Mode (on-board) | Pin 24 | Connect to ground during power-up to enter boot mode |
Carefully break the factory silicone seal around the aluminum casing to expose the printed circuit board (PCB). If entering Boot Mode, turning on the power
For detailed diagrams showing the exact pin locations on each plug, you can refer to specialized documentation:
When performing an engine swap (e.g., fitting a 1.6 16V TU5JP4 engine into a different chassis), the ME7.4.5 harness is often retained. Key challenges include: This chip holds vehicle-specific, non-volatile data such as
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.