Patent ID: 11897342
Assignee: DENSO CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  Y | IPC B

Claim 6:
7. An electronic control apparatus comprising:
a first controller for controlling a predetermined electronic device installed in a vehicle, the first controller being configured to be activated, upon being fed with electric power through a first electric power feeding path, and thus brought into an activated state; and
a second controller configured to be fed with electric power through a second electric power feeding path that is different from the first electric power feeding path,
wherein
in the first electric power feeding path, there is provided a power supply switch,
the power supply switch is configured to:
be turned on, when a predetermined switch command for the power supply switch is a connection command, and thereby enable the first electric power feeding path to transmit electric power; and
be turned off, when the switch command is a cutoff command, and thereby disable the first electric power feeding path from transmitting electric power,
the first controller is further configured to transmit a state signal indicating whether the first controller is in the activated state or a stopped state where the activation thereof is stopped,
the second controller is further configured to perform at least one of a stuck-OFF diagnosis and a stuck-ON diagnosis for the power supply switch,
in the stuck-OFF diagnosis, the second controller diagnoses, on condition that the state signal indicates the stopped state of the first controller when the switch command is the connection command, the power supply switch as being abnormal, and
in the stuck-ON diagnosis, the second controller diagnoses, on condition that the state signal indicates the activated state of the first controller when the switch command is the cutoff command, the power supply switch as being abnormal,
wherein
the second controller is configured to:
diagnose, when a predetermined signal normality condition is satisfied, the state signal as being normal; and
perform, only upon diagnosing the state signal as being normal, the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis.