: Jump the positive power supply lead to Pin 2 .
| Myth | Truth | |------|-------| | Pin A4 is chassis ground | ❌ A4 is – connecting to chassis will corrupt TPS/MAP readings | | Any 12V on injector pins is fine | ❌ Injector pins are ground-switched – backfeeding 12V destroys the driver IC | | CAN pins are unused without immobilizer | ❌ CAN is still required for engine RPM to instrument cluster | | ME20 and ME7.4 pinouts are identical | ❌ ME7.4 has additional wideband O2 pins – swapping ECUs requires repinning |
Are you troubleshooting a or trying to clone/remap the chip ? bosch me20 pinout verified
: Engine Coolant Temperature (ECT) Sensor — Resistance-based thermal input signal.
These pins are mandatory for powering up the processor board. Without these connections, your diagnostic scanner or chip tuning interface will not detect the hardware. : Jump the positive power supply lead to Pin 2
Before applying power, identify your specific module. The Bosch ME2.0 housing features a multi-plug connector system divided into distinct modular blocks (often labeled Modular Engine Management).
Since you mentioned the pinout verification, I’m assuming you are either bench flashing, diagnosing a "bricked" ECU, or building a simulator. These pins are mandatory for powering up the processor board
However, persistence paid off. After two weeks of waiting and with no response from India, a final attempt was made by reaching out to Bosch's Middle East team. This team proved to be the key, escalating the request to their engineering department. After a week, they provided the official pinout information. This shows that while the process can be challenging, going directly to a regional Bosch engineering hub is the most effective official method.