초록 ▼

A method and device for diagnosing a vehicle, in which a forced activation signal Sx is supplied to a diagnostic target part through an ECU. A current state of the detected diagnostic target part is compared with a state predicted when the forced activation signal Sx is given to diagnose the diagnos

A method and device for diagnosing a vehicle, in which a forced activation signal Sx is supplied to a diagnostic target part through an ECU. A current state of the detected diagnostic target part is compared with a state predicted when the forced activation signal Sx is given to diagnose the diagnostic target part. The forced activation signal Sx when the diagnostic target part is judged to be good, or after a predetermined time has elapsed since issue of the signal Sx was initiated.

대표청구항 ▼

[ What is claimed is:] [1.]1. A vehicle diagnostic method for repeatedly circulative execution of diagnoses for plural items, in which a diagnostic item or items that have been judged to be passed are removed in order from diagnostic targets while continuously circulative execution of diagnoses for

[ What is claimed is:] [1.]1. A vehicle diagnostic method for repeatedly circulative execution of diagnoses for plural items, in which a diagnostic item or items that have been judged to be passed are removed in order from diagnostic targets while continuously circulative execution of diagnoses for remaining items, and a forced activation signal for at least one diagnostic item selected from the plural diagnostic items is issued so that a target part related to the diagnostic item will show an expected state, wherein the diagnostic item is judged to be good or bad based on whether or not an actual state of the target part is in the expected state, said method comprising the steps of:circulatively executing every diagnostic item without failing execution of a diagnosis for the diagnostic item corresponding to the forced activation signal while being supplied; andstopping issue of the forced activation signal either when the corresponding item is judged to be good or when predetermined time for execution of the diagnosis has elapsed.