Bosch M7 Ecu Pinout -
(Note: Pin locations are based on the standard PSA M7.4.x / M7.4.4 / M7.4.5 layout. Always verify wire colors against your specific vehicle schematic.)
| 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 |
Connect and Pin 2 to the Power Supply Negative Terminal (-12V). Bosch M7 Ecu Pinout
| Component / Function | Pin Name/Label | Description | | :--- | :--- | :--- | | | Batt or +B | Permanent battery power, to keep the ECU's memory alive | | Switched +12V | Ignition or IG | Power from the ignition switch to wake up the ECU | | Ground (GND) | E1, E2 | Main and sensor ground points. Critical for stable signals | | Injectors | INJ1, INJ2... | Outputs that command the fuel injectors to open | | Ignition Coils | IGN1, IGN2... | Outputs that trigger the ignition coil(s) | | Oxygen Sensor | Lambda or O2 | Input for the air-fuel ratio signal from the oxygen sensor | | K-Line | K-Line | A bi-directional communication line for diagnostics (pre-CAN) |
Check for +12V at the injector plugs and confirm the ECU is grounding the injectors (low-side) while cranking. (Note: Pin locations are based on the standard PSA M7
Row A (Top) A1 A2 A3 ... A27 Row B (Middle) B1 B2 B3 ... B27 Row C (Bottom) C1 C2 C3 ... C27
Connect to the Power Supply Positive Terminal (+12V switched). Critical for stable signals | | Injectors | INJ1, INJ2
For custom wiring harnesses or standalone engine management conversions, the following sensor clusters are vital: