Probably broken wire somewhere in BAS and starter-circuit.
1. Trace flow of electricity and measure voltage at various junctions on way to starter. Where power disappears shows problem is between that test point and previous one that did have power.
2. Sensor error code refers to issue with circuit in addition to sensor itself. There's typically a 5v reference line, a ground wire and signal wire involved. With BAS, it typically controls ground of starter-solenoid using AND/OR logic circuit in combination with clutch, sidestand and neutral switches. Measure all those switches and verify they are either open or closed in proper sequence to satisfy ground leg of starter-solenoid.
1. Trace flow of electricity and measure voltage at various junctions on way to starter. Where power disappears shows problem is between that test point and previous one that did have power.
2. Sensor error code refers to issue with circuit in addition to sensor itself. There's typically a 5v reference line, a ground wire and signal wire involved. With BAS, it typically controls ground of starter-solenoid using AND/OR logic circuit in combination with clutch, sidestand and neutral switches. Measure all those switches and verify they are either open or closed in proper sequence to satisfy ground leg of starter-solenoid.
