Patent ID: 7853768

Claim:
An electronic control apparatus connected to an another electronic control apparatus via a communication line, in which the another electronic control apparatus judges that an abnormality occurs in the electronic control apparatus in the case in which a time from when the power switch is turned ON until when a steady process is started for being executed in the electronic control apparatus exceeds a threshold, comprising: a rewritable non-volatile memory; a writing section that executes writing of backup data into the rewritable nonvolatile memory during self-shutoff process after a power switch is turned OFF; and a steady process resuming section that resumes steady process to be executed corresponding to an ON-state of the power switch, when the power switch is again turned ON during the writing of the backup data into the memory by the writing section and when the writing of the backup data is not terminated before elapse of a predetermined time from an instant when the power switch is again turned ON, the steady process resuming section setting a time shorter than the threshold as the predetermined time.