Control method of engine control device and saddled vehicle

To provide an engine control device and a method for controlling an engine control device, and a saddle type vehicle capable of efficiently transmitting a rotation state of an ACG starter motor to an engine control device divided into two.In an engine control device (100) including a first control device (70) that controls an ACG starter motor (50) directly connected to a crank shaft (C) of an engine (E) and a second control device (80) that controls a fuel injection device (90), the first control device (70) is connected to a crank angle sensor (40) that detects a rotation state of the ACG starter motor (50). The second control device (80) is configured to receive an output signal of the crank angle sensor (40) from the first control device (70). The first control device (70) transmits the output signal of the crank angle sensor (40) to the second control device (80) as a pulse signal at the time of normal rotation of the ACG starter motor (50), and converts the output signal of the crank angle sensor (40) i