Patent ID: 6729749
Filing Date: 2004-05-04
Classification: B60Q

Abstract:
An automatic headlight axis direction control system comprising:a vehicle information detection means for detecting information used for controlling a light axis direction of a headlight; a control angle calculation means for calculating a light axis control angle; a light axis direction adjustment means for moving the light axis direction such that the light axis direction has the light axis control angle; a direction detection means for outputting a signal having a level correlated to the light axis direction of the headlight; and a failure detection means for detecting a failure in the light axis direction adjustment means based upon a predetermined value and the level of the signal that is outputted from the direction detection means when the light axis direction adjustment means is driven such that the direction detection means outputs the predetermined value unless a failure occurs in the light axis direction adjustment means before the light axis direction is controlled using the light axis direction adjustment means, wherein the failure detection occurs in response to an engine starting operation.