If flashing or reading the EEPROM, ensure your power supply provides a steady 13.5V - 14V . Dropping below 12V during a write can "brick" the unit.
| Pin Number | Signal Name | Description | | --- | --- | --- | | 30 | Fuel Pump | Fuel pump control | | 31 | Fan Control | Cooling fan control | | 32 | MIL | Malfunction indicator lamp (check engine light) | bosch me20 pinout verified