Use cable F32GN037C/D for bench work—ensure the Power LED is active before reading.
: Sensor Power Supply — Regulated +5V output from the ECU to power the MAF and TPS.
: Handles high-speed data exchange between the ECU and the Drive Authorization System (DAS). Common Signal Groups (Reference: Mercedes W202/W210) Pin Assignments (Typical) 1, 2, 3, 6 Ignition Coils +12V from Main Relay 5, 6, 7, 8 Fuel Injectors Crankshaft Position Sensor Ignition Switch (IGN) Power Ground (GND) System Integration Drive Authorization (DAS 3) bosch me20 pinout verified
| Pin | Signal | Verified Function | Notes | | :--- | :--- | :--- | :--- | | | | | | | 3 | Ground | ECU Main Ground (Sensor) | Must be clean. Do not share with injectors. | | 8 | Ground | Power Ground (Injectors/Coils) | Heavy gauge wire. | | 37 | B+ | Permanent 12V (Memory) | Fused at 5A. | | 54 | B+ | Main Relay 12V (Power) | Switched via Motronic relay (Pin 56). | | SENSORS | | | | | 4 | TPS | Throttle Position Signal (0-5V) | Verified linear sweep. | | 21 | MAP | Manifold Absolute Pressure | 1-4.5V linear. | | 22 | IAT | Intake Air Temp (NTC) | ~2.5k Ohms @ 20°C. | | 40 | CLT | Coolant Temp (NTC) | Same curve as IAT. | | 52 | CKP | Crank Speed Sensor (Shielded) | VR sensor. Polarity matters! | | 43 | CMP | Cam Sensor | Hall effect (0-5V square wave). | | 50 | KS | Knock Sensor 1 | AC voltage. Shield to Pin 49. | | ACTUATORS | | | | | 7 | Injector 1 & 4 | Ground side switching | Saturated drivers (No ballast). | | 9 | Injector 2 & 5 | Ground side switching | | | 11 | Injector 3 & 6 | Ground side switching | | | 13 | Fuel Pump Relay | Ground trigger | Activates prime for 2 seconds. | | 23 | Ignition Output 1 | Coils 1 & 6 (Wasted spark) | Confirmed logic level (5V). | | 24 | Ignition Output 2 | Coils 2 & 5 | | | 25 | Ignition Output 3 | Coils 3 & 4 | | | 56 | Main Relay Control | Ground trigger | Switches Pin 54 power. |
The Bosch ME20 (also known as ME2.0) engine control unit (ECU) manages Mercedes-Benz M112 V6 and M113 V8 engines from the late 1990s and early 2000s. Whether you are troubleshooting a crank-no-start condition, wiring a standalone harness, or performing an engine swap into another chassis, having a verified pinout diagram is critical. Use cable F32GN037C/D for bench work—ensure the Power
Launch your software, select the correct Bosch ME2.0 family architecture, and select "Read". 🔍 Troubleshooting Bench Communication Failures
The Bosch ME20 engine control unit (ECU) manages various late-1990s and early-2000s powertrains, most notably Mercedes-Benz vehicles equipped with M112 V6 and M113 V8 engines. Finding a verified pinout for the ME20 is critical whether you are troubleshooting a crank-no-start condition, wiring a standalone harness, or performing an engine swap. | | 37 | B+ | Permanent 12V (Memory) | Fused at 5A
The Bosch ME2.0 (often stylized as ME 2.0) engine management system was widely utilized by Mercedes-Benz for their M112 V6 and M113 V8 engines. This guide provides the complete, bench-tested pinout configuration to help you safely wire your control unit. Bosch ME2.0 Hardware Overview
: Permanent Battery Power (+30) — 12V constant from fuse box for memory retention.