: Variable resistance sensors sharing a dedicated sensor ground pin. 3. Actuator Outputs (Driver Stages)
| Pin | Function / Assignment | Signal Type | | :--- | :--- | :--- | | 1 | Ignition coil output (OUTPUT) | High-current trigger | | 3 | Fuel pump relay control (OUTPUT) | Switched ground | | 4 | Idle stabilizer control (OUTPUT) | Switched power | | 6 | Tachometer signal (OUTPUT) | Digital signal | | 8 | Hall effect sensor (signal wire) (INPUT) | Digital 5V | | 10 | Ground #1 (0V) | System ground | | 11 | Knock Sensor 1 (INPUT) | Analog signal | | 12 | 5V reference voltage (OUTPUT) | +5V to sensors | | 15 | Fuel injector #3 control (OUTPUT) | Switched ground | | 16 | Fuel injector #2 control (OUTPUT) | Switched ground | | 17 | Fuel injector #1 control (OUTPUT) | Switched ground | | 18 | +12V permanent battery feed (INPUT) | Constant power | | 19 | Ground #3 (0V) | System ground | | 23 | Wastegate frequency valve (OUTPUT) | PWM ground switch | | 24 | Engine speed signal (INPUT) | Signal from crankshaft | | 27 | +12V ignition switch supply (INPUT) | Switched ignition power | | 37 | +12V main relay supply (INPUT) | Switched power via relay | | 49 | Crankshaft position sensor (positive) (INPUT) | Analog signal |
Sends a 0–5V or frequency signal dictating engine load. bosch motronic ecu pinout
Support for sequential fuel injection, individual coil-on-plug ignition, and Mass Air Flow (MAF) sensors. Modern Eras: Motronic ME7, MED9, and MED17
Simple, rugged, and heavily reliant on analog inputs like Air Flow Meters (AFM) with physical flaps. OBD-I and Early OBD-II: Motronic M3.x and M5.x : Variable resistance sensors sharing a dedicated sensor
Hook up the Terminal 30 pin to the positive (+) 12V supply.
Instead of searching by car model (which can have variations), the feature identifies the ECU by the hardware code printed on the unit (e.g., 0 261 200 173 ). Instead of searching by car model (which can
Individual pins that pulse the ground side of the fuel injectors.
