| 摘要 |
PURPOSE:To attain the control with high reliability by replacing a data stored in a rewrite enable storage means into a data stored in a general-purpose data storage means when the data stored in the rewrite enable storage means is not effective. CONSTITUTION:An arithmetic control means M3 executes the control relating to the operation of a vehicle according to a procedure stored normally in a fixed storage means M1 and a data stored in the rewrite enable storage means M2 is used as to various factors on the control different depending on the controlled system. When the data stored in the means M2 is not effected to the execution of a prescribed control relating to the operation of the vehicle, it is detected by an ineffective data detection means M5. Then the data stored in the general-purpose data storage means M4 in advance is used in place of the ineffective data to perform the prescribed control relating to the operation of vehicle.
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