| 摘要 |
It is possible to securely detect an erroneous connection between ignition devices and a fuel injection control apparatus by a simple structure without causing any cost increase, in the fuel injection control apparatus of a multiple cylinder engine utilizing ignition signals of ignition devices as reference timings for fuel injection timings. In a method of detecting an erroneous connection of an ignition device, the method being executed by a fuel injection control apparatus which is provided in a multiple cylinder engine having different timing intervals between successive ignition timings for cylinders, the method includes the steps of measuring a first interval time (t 1 ) from an input of an ignition signal (x 1 ) for a predetermined cylinder to an input of the next ignition signal (y 1 ), and a second interval time (t 2 ) from the input of the next ignition signal (y 1 ) to an input of a further next ignition signal (x 2 ), determining whether or not an erroneous connection exists by comparing a relation between interval times t 1 and t 2 with a previously stored normal relation between interval times t 1 and t 2 in the case that the wiring is correctly connected in accordance with a predetermined procedure, and outputting and displaying the erroneous connection to the predetermined erroneous connection display means if it is determined that the erroneous connection exists.
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