av1000

Hello my friend , y do not speack rusian, y hope this is not o problem on this forum. Y have a ecu for Astra G 2001, isuzu edu end y do not know what tipe of transistor is that whit mark SMD :: SB1"". If someone help me whit any idee ??? Y think is NPN or PNP not MOSFET or two diode series maybe. Y can nop post the picture to see wher is mounted on the PCB board , is two or three pieces on the board.