| Connector A (Left) | Connector B (Center) | Connector C (Right) | |--------------------|----------------------|---------------------| | Pins 1-32 (Power) | Pins 1-32 (Sensors) | Pins 1-32 (Outputs) |

Detailed wiring diagrams and pinout guides for specific M7 sub-models are available on platforms like Scribd and ECU Design . You can also find community-maintained pinout repositories on GitHub for various vehicle brands. Bosch m7.8.0 Piaggio | PDF - Scribd

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This connector handles sensor inputs, power supply, and network communication.

| Manufacturer | Model / Engine | Pinout Difference | |-------------------|---------------------------|------------------------------------------------------------------------------------| | | 1.4L TU3JP (M7.4.4) | No VVT (C3 missing). EVAP on C2. | | Renault | K4M 1.6L (M7.9.7) | Cam sensor (B6) is magnetic, not Hall. A/C compressor on C6 is inverted logic. | | Nissan | QG15/QG18 (M7.9.8) | Additional pins for NATS immobilizer (C15, C16). Different crank trigger pattern. | | Fiat | 1.2L FIRE (M7.2) | Only 48 pins total. No connector C. Injectors on A1-A4, coils on A5-A6. |

Turn ignition ON. Measure between B1 (5V ref) and B15 (sensor ground) . Expect 4.9V – 5.1V. If not present, the ECU is faulty or shorted.