Bosch Me20 Pinout Verified (LIMITED — BREAKDOWN)

The Bosch ME2.0 ECU is a cornerstone of late 90s and early 2000s automotive engineering, famously powering high-performance Mercedes-Benz engines like the M112 V6 and M113 V8. Whether you are performing a diagnostic repair, an IMMO OFF procedure, or bench-flashing for performance, having a verified pinout is critical to avoid damaging these sensitive control modules. Core Verified Pinout (Bench Connection)

For basic communication, immo-off procedures, or "virginizing" the ECU using tools like FVDI or SVCI, you must provide constant power ( +12Vpositive 12 cap V ), ignition power ( ACCcap A cap C cap C ), and Ground ( GNDcap G cap N cap D Pin Function Pin Number Main Power (+12V) Ignition Power (+12V) Ground (GND) Pins 4, 5, 6 Diagnostic/K-Line Pin 8 or 28 (typically for OBD/K-Line) Detailed Component Connections bosch me20 pinout verified

The Challenge of Verification

Before delving into specific pins, it is vital to address the issue of verification. In the automotive aftermarket, pinout diagrams are often passed around on forums without context. A "verified" pinout is one that has been confirmed via: The Bosch ME2

No Communication: If the ECU won't talk on the bench, verify Section 4, Pin 24 has a full +12Vpositive 12 cap V signal. This is the "wake-up" line for the processor. In the automotive aftermarket, pinout diagrams are often

6. Bosch ME20 Pinout Cheat Sheet (Printable)

For your workshop wall – Verified ME20.4/6: