: Receives a low-current trigger from the ECU and closes the high-amp bridge to feed the fuel delivery system. Intermittent stalling or "crank-no-start" scenarios frequently trace back to pitted contacts on this specific internal relay.
Provides power to the ECU (Engine Control Unit). siemens bsm b3 schematic
Communicating with other control units, such as the ABS (Anti-lock Braking System) and the main BSI (Body Systems Interface). Schematic and Internal Layout : Receives a low-current trigger from the ECU
Managing relays for lighting (headlamps, fog lights), fuel pumps, and other high-current accessories. and other high-current accessories.