. This often requires hardware modification or specific resistor placement: Bootstrap Configuration : Connect two 680-ohm resistors
The Bosch M7.9.7 uses high-frequency grounding switches to fire fuel injectors and ignition coils. Ensure Pin 51 and Pin 53 are crimped into clean, paint-free metal eyelets directly on the engine block or main battery ground terminal. bosch m797 pinout better
| Pin | Signal | Type | Notes | |-----|-------------------|-------------|--------------------------------| | A1 | Battery +12 V | Power | Main relay feed | | A2 | Ground | Power | ECU main ground | | A8 | Injector Cyl 1 | Low‑side | 1.5 A peak | | B3 | +5 V sensor out | Reference | 50 mA max | | B12 | Sensor ground | Analog GND | Must not connect to power GND | | B22 | K‑line | Bidirectional | 10400 baud | | Pin | Signal | Type | Notes