| 摘要 |
PURPOSE:To decide the first detector to be abnormal when the second detector detects a car speed to be in a preset value or more with a car speed, detected by the first car speed detector, less than the preset value, by providing the first car speed detector corresponding to the car speed and the second detector detecting the car speed to increase to the preset value or more. CONSTITUTION:A control means 48 connects the first car speed detector 49a, second car speed detector 49b and a lateral acceleration detector 50. The second car speed detector 49b, which serves as the switch conducted when a car speed increases to a preset value or more, is connected to an abnormality diagnostic circuit 67. This abnormality diagnostic circuit 67 inputs a signal corresponding to a car speed V from a pulse converter circuit 51. When the second car speed detector 49b is conducted and when the detected car speed V by the detector 49a is less than the preset value, the abnormality diagnostic circuit 67 decides the first car speed detector 49a to be in trouble, and the circuit 67 inputs its signal to a fail safe circuit 64 cutting off a transistor 65. |
