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

Claim 14:
15. 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 electronic control apparatus further comprises, apart from the power supply switch, a stop unit capable of stopping the activation of the first controller,
the second controller is configured to perform at least the stuck-ON diagnosis,
the second controller is further configured to:
stop the activation of the first controller by the stop unit;
set the switch command to the cutoff command; and
release, after a predetermined first time has elapsed from the setting of the switch command to the cutoff command, the stopping of the activation of the first controller by the stop unit, and
the second controller is further configured to diagnose, on condition that the state signal indicates the activated state of the first controller before a predetermined second time has elapsed from the release of the stopping of the activation of the first controller by the stop unit, the power supply switch as being abnormal.