Diagnostic device for checking a control signal line
First Claim
1. A diagnostic device for checking a control signal wire disposed between a controller of a motor vehicle and a vehicle-side charging port for a battery of the motor vehicle, the diagnostic device comprising:
- a first resistor and a diode arranged in the controller, said first resistor connecting the control signal wire to ground,a second resistor connected electrically in parallel with a group consisting of the diode and the first resistor on the vehicle-side charging port,an evaluation device of the controller comprising at least one of a current source and a voltage source arranged in the controller for supplying a current or a voltage when the battery is not being charged, said evaluation device configured to measure a current or a voltage indicating a control signal wire defect by using the parallel connection of the first and the second resistor.
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Accused Products
Abstract
A diagnostic device for checking a control signal wire between a controller of a motor vehicle and a charging port for a battery of the motor vehicle located on the motor vehicle side is disclosed, wherein on the charging port side, a first resistor is provided in the controller connecting the control signal wire to chassis ground, and a second resistor connected in parallel to the first resistor is provided. An evaluation device of the controller has a current source and/or a voltage source for supplying an electric current and/or a voltage independent of a charging process, and is configured to measure an electric current indicating a defect in the control signal wire, or a voltage indicating a defect in the control signal wire, utilizing the first and the second resistor.
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Citations
10 Claims
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1. A diagnostic device for checking a control signal wire disposed between a controller of a motor vehicle and a vehicle-side charging port for a battery of the motor vehicle, the diagnostic device comprising:
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a first resistor and a diode arranged in the controller, said first resistor connecting the control signal wire to ground, a second resistor connected electrically in parallel with a group consisting of the diode and the first resistor on the vehicle-side charging port, an evaluation device of the controller comprising at least one of a current source and a voltage source arranged in the controller for supplying a current or a voltage when the battery is not being charged, said evaluation device configured to measure a current or a voltage indicating a control signal wire defect by using the parallel connection of the first and the second resistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A motor vehicle comprising a diagnostic device for checking a control signal wire disposed between a controller of a motor vehicle and a vehicle-side charging port for a battery of the motor vehicle, the diagnostic device comprising:
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a first resistor and a diode arranged in the controller, said first resistor connecting the control signal wire to ground, a second resistor connected electrically in parallel with a group consisting of the diode and the first resistor on the vehicle-side charging port, an evaluation device of the controller comprising at least one of a current source and a voltage source arranged in the controller for supplying a current or a voltage when the battery is not being charged, said evaluation device configured to measure a current or a voltage indicating a control signal wire defect by using the parallel connection of the first and the second resistor.
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10. A method for detecting a control signal wire defect of a control signal wire disposed between a controller of a motor vehicle and a charging port for a battery of the motor vehicle, the method comprising:
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connecting the control signal wire to ground by way of a first resistor and a diode arranged in the controller, electrically connecting a second resistor arranged on a vehicle-side charging port in parallel with a group consisting of the diode and the first resistor, feeding a voltage or a current to a circuit comprising the first and the second resistor when the battery is not being charged, measuring at another location of the circuit a current or a voltage that depends on whether the second resistor is available in the circuit, by utilizing the parallel connection of the group consisting of the diode and the first resistor and the second resistor, and evaluating with an evaluation device the measured current or voltage with respect to the control signal wire defect, said evaluation device comprising at least one of a current source and a voltage source arranged in the controller.
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Specification