Method for diagnosing a state in a vehicle, and diagnostic testing device
First Claim
1. A method for diagnosing a state in a vehicle, the vehicle having a CAN communications bus to which electronic control units of the vehicle are connected, the method comprising:
- providing a rest state of the vehicle, in which at least a portion of the electronic control units are configured not to send out a CAN message via the CAN communications bus in a normal operation;
coupling a diagnostic testing device to at least one diagnostic terminal of the vehicle, the at least one diagnostic terminal being able to be coupled to the CAN communications bus;
monitoring the CAN communications bus by the diagnostic testing device with regard to CAN messages sent out after entry into the rest state;
detecting, by the diagnostic testing device, a CAN message sent out on the CAN communications bus after entry into the rest state, and assigning, by the diagnostic testing device, the detected CAN message to an electronic control unit sending out the CAN message;
providing, by the diagnostic testing device, information regarding a chronological appearance of the detected CAN message in a series of CAN messages appearing on the CAN communications bus after entry into the rest state; and
providing, by the diagnostic testing device, information for identifying the electronic control unit sending out the detected CAN message.
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Accused Products
Abstract
A method for diagnosing a state in a vehicle, which has a CAN communications bus to which electronic control units of the vehicle are connected, includes providing a rest state of the vehicle; coupling a diagnostic testing device to at least one diagnostic terminal of the vehicle; monitoring of the CAN communications bus by the diagnostic testing device with regard to CAN messages sent out after entry into the rest state; detecting of a CAN message sent out on the CAN communications bus after entry into the rest state, and assigning of the detected CAN message to an electronic control unit sending out the CAN message; providing information regarding a chronological appearance of the detected CAN message in a series of CAN messages appearing on the CAN communications bus after entry into the rest state; and providing information for identifying the electronic control unit sending out the detected CAN message.
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Citations
11 Claims
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1. A method for diagnosing a state in a vehicle, the vehicle having a CAN communications bus to which electronic control units of the vehicle are connected, the method comprising:
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providing a rest state of the vehicle, in which at least a portion of the electronic control units are configured not to send out a CAN message via the CAN communications bus in a normal operation; coupling a diagnostic testing device to at least one diagnostic terminal of the vehicle, the at least one diagnostic terminal being able to be coupled to the CAN communications bus; monitoring the CAN communications bus by the diagnostic testing device with regard to CAN messages sent out after entry into the rest state; detecting, by the diagnostic testing device, a CAN message sent out on the CAN communications bus after entry into the rest state, and assigning, by the diagnostic testing device, the detected CAN message to an electronic control unit sending out the CAN message; providing, by the diagnostic testing device, information regarding a chronological appearance of the detected CAN message in a series of CAN messages appearing on the CAN communications bus after entry into the rest state; and providing, by the diagnostic testing device, information for identifying the electronic control unit sending out the detected CAN message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A diagnostic testing device for diagnosing a state in a vehicle, the vehicle having a CAN communications bus, to which electronic control units of the vehicle are connected, the diagnostic testing device including:
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a terminal for coupling to at least one diagnostic terminal of the vehicle, the diagnostic terminal of the vehicle being able to be coupled to the CAN communications bus; a monitoring device for monitoring the CAN communications bus with regard to CAN messages sent out after entry into a rest state of the vehicle, in which at least a portion of the electronic control units are configured not to send out a CAN message via the CAN communications bus in a normal operation, the monitoring device being configured to detect a CAN message sent out on the CAN communications bus after entry into the rest state, and to assign the detected CAN message to an electronic control unit sending out the CAN message; and an information device which is configured to provide information regarding a chronological appearance of the detected CAN message in a series of CAN messages appearing on the CAN communications bus after entry into the rest state, and to provide information for identifying the electronic control unit sending out the detected CAN message.
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Specification