| Pin No. | Function | Description | | :--- | :--- | :--- | | | Injector Cylinder 1 | Earth triggered driver | | A2 | Injector Cylinder 2 | Earth triggered driver | | A3 | Injector Cylinder 3 | Earth triggered driver | | A4 | Injector Cylinder 4 | Earth triggered driver | | A5 | Tacho Output | Signal to Instrument Cluster | | A6 | MIL (Engine Light) | Earth triggered dashboard lamp | | A7 | AC Relay / Fan Control | Output relay control | | A8 | Ignition Coil 1&4 | Trigger signal (Logic level) | | A9 | Ignition Coil 2&3 | Trigger signal (Logic level) | | A10 | Rev Counter / Speed | Vehicle speed signal input | | A11 | Immobilizer Code | Data line from BSI/Immo box | | A12 | Stop Light Switch | Brake pedal status | | A13 | Clutch Switch | Clutch pedal status (if manual) | | A14 | Cruise Control | Input/Output (varies by model) | | A15 | Fuel Pump Relay | Output control | | A16 | Fan Control (Low/High) | PWM or Relay control | | A17 | Purge Valve (CANISTER) | Charcoal canister solenoid | | A18 | AC Compressor Clutch | Request/Output status | | A19 | Alternator Excitation | Charge control signal | | A20 | Diagnostic (K-Line) | ISO 9141 communication | | A21 | Camshaft Sensor (Signal) | Cylinder identification (Hall Effect) | | A22 | Sensor Earth | Ground reference for sensors | | A23 | +12V Battery (Switched) | Ignition power feed | | A24 | Power Ground | ECU Main Ground (To chassis/battery) |
Disclaimer: This article is for informational purposes. Automotive electrical work carries risk of fire or ECU damage. Always disconnect battery and follow safety procedures. Bosch M7 Ecu Pinout
Example B — distributor-based ignition | Pin No
Pin numbering viewed from (ECU removed, harness side): Always disconnect battery and follow safety procedures
(up to 112 channels in certain series) to handle data from various sensors and actuators. Bosch M7 Series Overview The "M" in M7 stands for , Bosch's name for integrated fuel and ignition control. : Commonly found in (Peugeot/Citroën) vehicles with TU-series engines. : Widely used in Hyundai/Kia : Frequently used in (M62TU engines) and other high-performance applications. Common Pin Assignments