# US 11,897,342 B2 · Electronic control apparatus

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- Number: US 11,897,342 B2
- Document ID: US11897342B2
- Status: Granted
- Kind: B2
- Application number: 17/705,883
- Filed: 2022-03-28
- Published: 2022-07-14
- Granted: 2024-02-13
- Earliest claimed: 2019-09-27
- Assignees: Denso Corporation
- Applicants: Denso Corporation
- Inventors: Tomohiro Takizawa; Akira Sumi
- Web page: https://patentgrep.com/patent/US11897342B2

## CPC

- B60L 3/0046: {relating to electric energy storage systems, e.g. batteries or capacitors}
- B60L 58/22: Balancing the charge of battery modules
- B60R 16/033: characterised by the use of electrical cells or batteries (for propulsion puposes B60K1/04; supplying batteries to, or removing batteries from, vehicles B60S5/06; testing of charge state G01R31/36)
- H01H 9/54: Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00)
- H02J 1/00: Circuit arrangements for DC mains or DC distribution networks
- H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J 7/02: for charging batteries from AC mains by converters
- B60L 2240/547: Voltage
- Y02E 60/10: Energy storage using batteries
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

An electronic control apparatus includes a first controller that is activated upon being fed with electric power through a first electric power feeding path, and a second controller that is fed with electric power through a second electric power feeding path. In the first electric power feeding path, there is provided a power supply switch that is turned on when a switch command is a connection command and turned off when the switch command is a cutoff command. The first controller transmits a state signal indicating whether it is in an activated state or a stopped state. The second controller diagnoses the power supply switch as being abnormal on condition that the state signal indicates the stopped state of the first controller when the switch command is the connection command or the state signal indicates the activated state of the first controller when the switch command is the cutoff command.

## Claims

### Claim 1

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, and
in a main power supply OFF state where a main power supply switch of the vehicle is kept OFF, the second controller causes, on condition that the power supply switch is diagnosed as being abnormal, the stop unit to stop the activation of the first controller.

### Claim 2 (depends on 1)

The electronic control apparatus as set forth in claim 1, further comprising a third electric power feeding path through which electric power is fed to a predetermined part of the first controller,
wherein
in the third electric power feeding path, there is provided a power feeding switch,
the second controller is configured to:
diagnose, when a predetermined condition is satisfied, the power feeding switch as having a stuck-ON fault; and
perform, only upon diagnosing the power feeding switch as having no stuck-ON fault, the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis for the power supply switch.

### Claim 3 (depends on 2)

The electronic control apparatus as set forth in claim 2, wherein
the power feeding switch is configured to:
be turned on, when a predetermined power-feeding switch command for the power feeding switch is a power feeding command, to enable the third electric power feeding path to transmit electric power; and
be turned off, when the power-feeding switch command is a cutoff command, to disable the third electric power feeding path from transmitting electric power,
the electronic control apparatus further comprises a signal transmitter,
the signal transmitter is configured to transmit a power-feeding state signal indicating either an output state where a predetermined voltage is outputted from the third electric power feeding path or a non-output state where no voltage is outputted from the third electric power feeding path, and
the second controller is configured to diagnose, on condition that the power-feeding state signal indicates the output state when the power-feeding switch command is the cutoff command, the power feeding switch as having the stuck-ON fault.

### Claim 4 (depends on 1)

The electronic control apparatus as set forth in claim 1, wherein
in the vehicle, there is installed an assembled battery that is constituted of a plurality of battery cells connected in series with each other,
the plurality of battery cells are divided into a plurality of battery cell groups,
the predetermined electronic control apparatus comprises a plurality of monitors each of which is provided for a corresponding one of the battery cell groups,
each of the monitors is configured to transmit cell voltage information, which is information on voltages of the battery cells of the corresponding battery cell group, to the first controller,
the second controller is configured to start performing the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis at a preset diagnosis start timing, and
the diagnosis start timing is a timing at which activation of the vehicle is stopped and which is after the first controller has finished storing the cell voltage information in a predetermined nonvolatile memory.

### Claim 5 (depends on 1)

The electronic control apparatus as set forth in claim 1, wherein
in the vehicle, there is installed an assembled battery that is constituted of a plurality of battery cells connected in series with each other,
the plurality of battery cells are divided into a plurality of battery cell groups,
the predetermined electronic control apparatus comprises a plurality of monitors each of which is provided for a corresponding one of the battery cell groups,
each of the monitors is configured to start, in response to an equalization command transmitted from the first controller, performing an equalization process of equalizing voltages of the battery cells of the corresponding battery cell group,
the second controller is configured to start performing the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis at a preset diagnosis start timing, and
the diagnosis start timing is a timing at which activation of the vehicle is stopped and which is after the first controller has finished transmitting the equalization command to the monitors.

### Claim 6 (depends on 5)

The electronic control apparatus as set forth in claim 5, wherein
the diagnosis start timing is a timing before the equalization process is completed by the monitors, and
the second controller is configured to perform the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis in parallel with execution of the equalization process by the monitors.

### Claim 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.

### Claim 8 (depends on 7)

The electronic control apparatus as set forth in claim 7, further comprising, apart from the power supply switch, a stop unit capable of stopping the activation of the first controller,
wherein
the signal normality condition comprises a condition that the state signal indicates the activated state of the first controller when the switch command is the connection command and the activation of the first controller is not stopped by the stop unit.

### Claim 9 (depends on 7)

The electronic control apparatus as set forth in claim 7, further comprising, apart from the power supply switch, a stop unit capable of stopping the activation of the first controller,
wherein
the signal normality condition comprises a condition that the state signal indicates the stopped state of the first controller when the switch command is the connection command and the activation of the first controller is stopped by the stop unit.

### Claim 10 (depends on 7)

The electronic control apparatus as set forth in claim 7, further comprising a third electric power feeding path through which electric power is fed to a predetermined part of the first controller,
wherein
in the third electric power feeding path, there is provided a power feeding switch,
the second controller is configured to:
diagnose, when a predetermined condition is satisfied, the power feeding switch as having a stuck-ON fault; and
perform, only upon diagnosing the power feeding switch as having no stuck-ON fault, the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis for the power supply switch.

### Claim 11 (depends on 10)

The electronic control apparatus as set forth in claim 10, wherein
the power feeding switch is configured to:
be turned on, when a predetermined power-feeding switch command for the power feeding switch is a power feeding command, to enable the third electric power feeding path to transmit electric power; and
be turned off, when the power-feeding switch command is a cutoff command, to disable the third electric power feeding path from transmitting electric power,
the electronic control apparatus further comprises a signal transmitter,
the signal transmitter is configured to transmit a power-feeding state signal indicating either an output state where a predetermined voltage is outputted from the third electric power feeding path or a non-output state where no voltage is outputted from the third electric power feeding path, and
the second controller is configured to diagnose, on condition that the power-feeding state signal indicates the output state when the power-feeding switch command is the cutoff command, the power feeding switch as having the stuck-ON fault.

### Claim 12 (depends on 7)

The electronic control apparatus as set forth in claim 7, wherein
in the vehicle, there is installed an assembled battery that is constituted of a plurality of battery cells connected in series with each other,
the plurality of battery cells are divided into a plurality of battery cell groups,
the predetermined electronic control apparatus comprises a plurality of monitors each of which is provided for a corresponding one of the battery cell groups,
each of the monitors is configured to transmit cell voltage information, which is information on voltages of the battery cells of the corresponding battery cell group, to the first controller,
the second controller is configured to start performing the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis at a preset diagnosis start timing, and
the diagnosis start timing is a timing at which activation of the vehicle is stopped and which is after the first controller has finished storing the cell voltage information in a predetermined nonvolatile memory.

### Claim 13 (depends on 7)

The electronic control apparatus as set forth in claim 7, wherein
in the vehicle, there is installed an assembled battery that is constituted of a plurality of battery cells connected in series with each other,
the plurality of battery cells are divided into a plurality of battery cell groups,
the predetermined electronic control apparatus comprises a plurality of monitors each of which is provided for a corresponding one of the battery cell groups,
each of the monitors is configured to start, in response to an equalization command transmitted from the first controller, performing an equalization process of equalizing voltages of the battery cells of the corresponding battery cell group,
the second controller is configured to start performing the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis at a preset diagnosis start timing, and
the diagnosis start timing is a timing at which activation of the vehicle is stopped and which is after the first controller has finished transmitting the equalization command to the monitors.

### Claim 14 (depends on 13)

The electronic control apparatus as set forth in claim 13, wherein
the diagnosis start timing is a timing before the equalization process is completed by the monitors, and
the second controller is configured to perform the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis in parallel with execution of the equalization process by the monitors.

### Claim 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.

### Claim 16 (depends on 15)

The electronic control apparatus as set forth in claim 15, wherein
the first time is predetermined to be longer than or equal to a time from the setting of the switch command to the cutoff command until the first controller becomes no longer activated even if the stopping of the activation of the first controller by the stop unit is released in the case of the power supply switch having no stuck-ON fault.

### Claim 17 (depends on 15)

The electronic control apparatus as set forth in claim 15, wherein
the second time is predetermined to be longer than or equal to a time from the release of the stopping of the activation of the first controller by the stop unit until the state signal becomes indicative of the activated state of the first controller in the case of the power supply switch having a stuck-ON fault.

### Claim 18 (depends on 15)

The electronic control apparatus as set forth in claim 15, wherein
the second controller is configured to diagnose, on condition that a series of operations have been repeated a plurality of times in the state of the switch command being the cutoff command, the power supply switch as being abnormal, and
the series of operations include:
releasing, in a state where the activation of the first controller is stopped by the stop unit, the stopping of the activation of the first controller by the stop unit; and then
having the state signal become indicative of the activated state of the first controller.

### Claim 19 (depends on 15)

The electronic control apparatus as set forth in claim 15, further comprising a third electric power feeding path through which electric power is fed to a predetermined part of the first controller,
wherein
in the third electric power feeding path, there is provided a power feeding switch,
the second controller is configured to:
diagnose, when a predetermined condition is satisfied, the power feeding switch as having a stuck-ON fault; and
perform, only upon diagnosing the power feeding switch as having no stuck-ON fault, the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis for the power supply switch.

### Claim 20 (depends on 19)

The electronic control apparatus as set forth in claim 19, wherein
the power feeding switch is configured to:
be turned on, when a predetermined power-feeding switch command for the power feeding switch is a power feeding command, to enable the third electric power feeding path to transmit electric power; and
be turned off, when the power-feeding switch command is a cutoff command, to disable the third electric power feeding path from transmitting electric power,
the electronic control apparatus further comprises a signal transmitter,
the signal transmitter is configured to transmit a power-feeding state signal indicating either an output state where a predetermined voltage is outputted from the third electric power feeding path or a non-output state where no voltage is outputted from the third electric power feeding path, and
the second controller is configured to diagnose, on condition that the power-feeding state signal indicates the output state when the power-feeding switch command is the cutoff command, the power feeding switch as having the stuck-ON fault.

### Claim 21 (depends on 15)

The electronic control apparatus as set forth in claim 15, wherein
in the vehicle, there is installed an assembled battery that is constituted of a plurality of battery cells connected in series with each other,
the plurality of battery cells are divided into a plurality of battery cell groups,
the predetermined electronic control apparatus comprises a plurality of monitors each of which is provided for a corresponding one of the battery cell groups,
each of the monitors is configured to transmit cell voltage information, which is information on voltages of the battery cells of the corresponding battery cell group, to the first controller,
the second controller is configured to start performing the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis at a preset diagnosis start timing, and
the diagnosis start timing is a timing at which activation of the vehicle is stopped and which is after the first controller has finished storing the cell voltage information in a predetermined nonvolatile memory.

### Claim 22 (depends on 15)

The electronic control apparatus as set forth in claim 15, wherein
in the vehicle, there is installed an assembled battery that is constituted of a plurality of battery cells connected in series with each other,
the plurality of battery cells are divided into a plurality of battery cell groups,
the predetermined electronic control apparatus comprises a plurality of monitors each of which is provided for a corresponding one of the battery cell groups,
each of the monitors is configured to start, in response to an equalization command transmitted from the first controller, performing an equalization process of equalizing voltages of the battery cells of the corresponding battery cell group,
the second controller is configured to start performing the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis at a preset diagnosis start timing, and
the diagnosis start timing is a timing at which activation of the vehicle is stopped and which is after the first controller has finished transmitting the equalization command to the monitors.

### Claim 23 (depends on 22)

The electronic control apparatus as set forth in claim 22, wherein
the diagnosis start timing is a timing before the equalization process is completed by the monitors, and
the second controller is configured to perform the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis in parallel with execution of the equalization process by the monitors.

### Claim 24

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; and
a third electric power feeding path through which electric power is fed to a predetermined part of the first controller,
in the third electric power feeding path, there is provided a power feeding switch,
the second controller is configured to:
diagnose, when a predetermined condition is satisfied, the power feeding switch as having a stuck-ON fault; and
perform, upon diagnosing the power feeding switch as having the stuck-ON fault, a power-feeding switch abnormality handling of keeping the switch command as the connection command and stopping the activation of the first controller by the stop unit in a main power supply OFF state where a main power supply switch of the vehicle is kept OFF.

### Claim 25 (depends on 24)

The electronic control apparatus as set forth in claim 24, wherein
the power feeding switch is configured to:
be turned on, when a predetermined power-feeding switch command for the power feeding switch is a power feeding command, to enable the third electric power feeding path to transmit electric power; and
be turned off, when the power-feeding switch command is a cutoff command, to disable the third electric power feeding path from transmitting electric power,
the electronic control apparatus further comprises a signal transmitter,
the signal transmitter is configured to transmit a power-feeding state signal indicating either an output state where a predetermined voltage is outputted from the third electric power feeding path or a non-output state where no voltage is outputted from the third electric power feeding path, and
the second controller is configured to diagnose, on condition that the power-feeding state signal indicates the output state when the power-feeding switch command is the cutoff command, the power feeding switch as having the stuck-ON fault.

### Claim 26 (depends on 24)

The electronic control apparatus as set forth in claim 24, wherein
in the vehicle, there is installed an assembled battery that is constituted of a plurality of battery cells connected in series with each other,
the plurality of battery cells are divided into a plurality of battery cell groups,
the predetermined electronic control apparatus comprises a plurality of monitors each of which is provided for a corresponding one of the battery cell groups,
each of the monitors is configured to transmit cell voltage information, which is information on voltages of the battery cells of the corresponding battery cell group, to the first controller,
the second controller is configured to start performing the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis at a preset diagnosis start timing, and
the diagnosis start timing is a timing at which activation of the vehicle is stopped and which is after the first controller has finished storing the cell voltage information in a predetermined nonvolatile memory.

### Claim 27 (depends on 24)

The electronic control apparatus as set forth in claim 24, wherein
in the vehicle, there is installed an assembled battery that is constituted of a plurality of battery cells connected in series with each other,
the plurality of battery cells are divided into a plurality of battery cell groups,
the predetermined electronic control apparatus comprises a plurality of monitors each of which is provided for a corresponding one of the battery cell groups,
each of the monitors is configured to start, in response to an equalization command transmitted from the first controller, performing an equalization process of equalizing voltages of the battery cells of the corresponding battery cell group,
the second controller is configured to start performing the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis at a preset diagnosis start timing, and
the diagnosis start timing is a timing at which activation of the vehicle is stopped and which is after the first controller has finished transmitting the equalization command to the monitors.

### Claim 28 (depends on 27)

The electronic control apparatus as set forth in claim 27, wherein
the diagnosis start timing is a timing before the equalization process is completed by the monitors, and
the second controller is configured to perform the at least one of the stuck-OFF diagnosis and the stuck-ON diagnosis in parallel with execution of the equalization process by the monitors.