Verification was performed using:
Chamber 1, Pin 7 (Note: Some variants also use Pin 8 as a secondary ground. Grounding the aluminum ECU casing is highly recommended). Communication Lines K-Line (Diagnostic Comms): Chamber 3, Pin 4
| Pin # | Signal Name | Description | | --- | --- | --- | | 11 | CK_Speed | Engine speed sensor input | | 12 | CK_Pos | Crankshaft position sensor input | | 13 | CAM_Pos | Camshaft position sensor input | | 14 | ECT | Engine coolant temperature sensor input | | 15 | IAT | Intake air temperature sensor input | bosch me20 pinout verified
The engine control unit (ECU) is a common sight in late-90s Mercedes-Benz vehicles, such as the W202, W208, and W210 models. Verified pinouts for these units are often used by tuners and mechanics for "bench" work—reading data or disabling immobilizers using tools like the Julie Emulator. Key pin assignments for the Bosch ME2.0 include:
Turn on the switched ignition power (+12V) to Plug E Pin 2 to initiate communication with the software. Complete Plug-by-Plug Wiring Architecture Plug A: Power Supplies and Grounds Verification was performed using: Chamber 1, Pin 7
Check pin B12 (Switched Power). Often, the ECU will not wake up without 12V on Terminal 15.
Always verify your specific Bosch part number (e.g., 0 261 204 XXX) before wiring, as slight variations exist between ME2.0 and ME2.1. Diagnostic Tools: Reliable bench reading often requires an OBDII interface or specialized ECU programmers. www.ecu-repairs.com wiring diagram for a particular Bosch part number, or are you looking for instructions? Bosch ECU Pinout Connections Guide | PDF | Engines - Scribd Verified pinouts for these units are often used
Drop the part number in the comments – we’ll help verify.
: Measure the voltage between Pin 16 (Sensor Power) and Pin 4 (Sensor Ground). A functional ECU internal voltage regulator will output a steady 4.95V to 5.05V . To help isolate your specific wiring issue, let me know: What vehicle make, model, and year are you working on?
vehicles from the mid-to-late 1990s, including models like the W202 C-Class, W210 E-Class, and early W163 M-Class. Verified pinouts are essential for tasks such as "virginizing" the unit for adaptation or performing an IMMO OFF procedure using tools like the Julie™ Emulator Verified Bench Pinout for Bosch ME2.0