Self-diagnostic method for a forklift truck

Abstract

A self-diagnostic method is provided capable of testing condition of various components for a forklift truck selectively, displaying the result test codes collectively on a display after completing the test, and initiating a quick test mode during a run mode by simply manipulating an accelerator pedal and a direction lever of the forklift truck. The method comprises the steps of: providing a mode selector with a diagnostic mode and a run mode, a fuse, a key switch, an accelerator, a direction switch having forward and reverse positions, a tilt switch, contactor coils and a controller; initiating a main routine by the controller; reading a signal from the mode selector to decide which mode is selected from the diagnostic mode and the run mode; identifying that the fuse is removed and that the key switch is turned on when the diagnostic mode is selected; checking condition of the switches and the accelerator selectively according to an inputted diagnostic command in the order of priority to produce error codes in case of failure detection; saving the error codes occurred; and displaying the error codes collectively when the tilt switch is turned on.

Dependencies are inferred from the claim text.