| 摘要 |
PROBLEM TO BE SOLVED: To prevent a heating accident caused by short-circuit of a bypass capacitor provided to a circuit board of a control unit resulting from salt damage and the like, by a small number of components compared with a conventional art.SOLUTION: A circuit board of a control unit used for controlling a vehicle, comprises: a power supply line 3 for supplying a power from a power supply to the control unit or a motor and a solenoid controlled by the control unit; a ground 4; and a bypass capacitor 2 provided between the power supply line 3 and the ground 4 for the purpose of reducing voltage fluctuation of the power supply. A fuse 1 is formed as a line provided between the bypass capacitor 2 and the ground 4 and having a predetermined length or more. The line is formed thinly to have a predetermined line width or less so as to be cut by a resistance heat when a current equal to or more than a predetermined current value flows therein. |
