To understand the pinout for the Bosch M7, it helps to know where it sits in the Motronic lineage. The 'Motronic' system from Bosch integrated electronic ignition and fuel injection into a single unit from its early generations onwards. The 'M' in M7 denotes the system's generation, which was a major step forward that controlled engines with higher precision than its predecessors.
Typically handles power distribution, chassis grounds, main relays, ignition switches, and diagnostic communication lines (K-Line/CAN-Bus).
| Pin | Function | Signal Type | Voltage / Notes | |-----|-----------------------------|----------------|-----------------------| | B1 | 5V Sensor Reference | Output | +5V ±0.1V | | B2 | Manifold Absolute Pressure (MAP) | Analog Input | 0.5V (idle) – 4.5V (WOT) | | B3 | Throttle Position Sensor (TPS) | Analog Input | 0.5V (closed) – 4.5V (WOT) | | B4 | Intake Air Temp (IAT) | Analog Input | 0°C = 3.07V, 80°C = 0.28V | | B5 | Engine Coolant Temp (ECT) | Analog Input | 20°C = 2.5V, 90°C = 0.5V | | B6 | Camshaft Position (CMP) | Digital Input | Hall sensor: 0-5V square wave | | B7 | Crankshaft Position (CKP) | Digital Input | Variable reluctance or Hall | | B8 | Oxygen Sensor 1 (Lambda) | Analog Input | 0.1V (lean) – 0.9V (rich) | | B9 | Oxygen Sensor 2 (post-cat) | Analog Input | 0.1V – 0.9V | | B10 | Vehicle Speed Sensor (VSS) | Digital Input | 0-12V square wave | | B11 | Brake Switch | Digital Input | 0V (off) / 12V (brake pressed) | | B12 | Clutch Switch | Digital Input | 12V (disengaged) | | B13 | A/C Request | Digital Input | 12V when AC on | | B14 | Power Steering Pressure Switch | Digital Input | 12V under load | | B15 | Sensor Ground Return | Ground | 0V | | B16 | 5V Reference (secondary) | Output | +5V for external sensors | | B17-B32 | Manufacturer specific / unused | - | Check factory diagram | Bosch M7 Ecu Pinout
For the most accurate, up-to-date information and safety guidelines, always consult the official service manual for your specific vehicle model.
For tuning or diagnostic tasks that require direct ECU access (like Boot Mode), specific cable colors often correspond to these pins: : +12V Power Black : Ground (GND) Yellow : K-Line communication Grey/Blue : Boot and CNF1 configuration pins for flashing Actionable Resources To understand the pinout for the Bosch M7,
Most M7 ECUs utilize an 81-pin or a 121-pin dual-plug connector interface, splitting assignments between engine components and vehicle chassis interfaces.
Its extensive use means that today, it remains a prime candidate for tuning, remanufacturing, bench diagnostics, and repair. For professionals, a firm grasp of the M7's pinout—the assignment of each pin in its connector—is essential for basic troubleshooting and complex modifications. Its extensive use means that today, it remains
Link Pin 1 and Pin 2 to the negative terminal of a stable 12V power supply.
Below is the for Bosch M7.4.4 / 7.9.7 systems (Peugeot/Citroën 1.6L 16V). Note that pin functions are standardized across 70% of applications, but always cross-reference.