M7 Ecu Pinout [portable] - Bosch

| Pin Number | Function (Typical) | | :--- | :--- | | | | | B1 | Main battery voltage (+12V) | | C5 | Switched ignition power (+12V) | | D9 | Main ECU ground | | Fuel & Ignition | | | C2 | Injector control cylinder 1 | | C3 | Injector control cylinder 2 | | C4 | Injector control cylinder 3 | | C5 | Injector control cylinder 4 | | B2 | Ignition coil control | | Sensor Inputs | | | A3 | Engine Coolant Temperature (ECT) sensor signal | | A4 | Throttle Position Sensor (TPS) signal | | A5 | Mass Air Flow (MAF) / Manifold Air Pressure (MAP) sensor signal | | B9 | Crankshaft Position Sensor (CKP) signal | | C10 | Knock sensor signal |

The Bosch M7 series Engine Control Unit (ECU), including popular variants like the ME7, ME7.5, and MED7, is a cornerstone of modern automotive engineering. Used extensively by major manufacturers like Volkswagen, Audi, BMW, and Porsche, mastering its wiring diagram and pinout configuration is essential for engine swaps, diagnostics, and performance tuning.

Low-side drivers that pulse the injectors by grounding the circuit. Bosch M7 Ecu Pinout

(e.g., bench flashing, an engine swap, or troubleshooting a specific sensor fault). Share public link

The M7.9.7 is one of the most common variants, typically featuring an 81-pin black connector. Pin Number Description Ignition Control Controls ignition for specific cylinders Permanent Power Permanent +12V battery supply Ignition Switched +12V from the ignition switch Main Relay Output control for the main relay Crankshaft Sensor Inputs for the VR (Variable Reluctance) sensor Throttle Signal Input from the accelerator/throttle potentiometer Power supply for MAP and TPS sensors ECU system ground Serial communication for diagnostics and tuning Interesting Technical Piece: The "Bootstrap" Mode | Pin Number | Function (Typical) | |

Probe B5 (ECT signal) to B15 (ground) . With engine cold, voltage should be ~2.5V (20°C). Start engine – voltage should drop as coolant warms.

For troubleshooting engine wiring harnesses or executing custom engine swaps, the larger connector controls the vital mechanical components. Electronic Throttle Body (Drive-by-Wire) With engine cold, voltage should be ~2

The is perhaps one of the most widespread and accessible ECUs in the tuning scene. It was widely used by manufacturers like LADA (VAZ), Chevrolet, and BYD, making it a prime target for cost-effective tuning projects. It’s popular because it is powerful enough for effective tuning yet simple enough for enthusiasts to work with on their own workbenches.

Used for diagnostics, data logging, and flashing/remapping the ECU.

Commonly found in PSA (Peugeot/Citroën) vehicles like the TU1JP and TU5JP engines, as well as Polaris off-road vehicles. It features three modular connectors with a total of 112 channels .

Pin numbering viewed from (ECU removed, harness side):