Scan tool with dropped communications detection and recovery and improved protocol selection
First Claim
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1. A method of operating an off-board device to communicate with a diagnostic system of a vehicle, the diagnostic system having one or more modules, comprising the steps of:
- (a) determining a number of pieces of information received from one or more modules using a first communications protocol;
(b) determining a number of pieces of information received from the one or more modules using a second communications protocol; and
(c) selecting from the plurality of communications protocols a communications protocol to use for communications between the off-board device and the diagnostic system using at least the number of pieces of information received from the one or more modules using the first communications protocol and the number of pieces of information received from the one or more modules using the second communications protocol.
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Abstract
An improved scan tool, e.g., for OBD II, for use with vehicle computer networks. The improved scan tool determines the proper protocol to use to communicate with a vehicle computer network. The proper protocol is determined by requesting information from the vehicle computer network using a plurality of protocols and selecting the protocol that returns the most pieces of information. In addition, the improved scan tool determines a communications drop-out with one or more modules and automatically recovers from the communications drop-out.
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Citations
23 Claims
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1. A method of operating an off-board device to communicate with a diagnostic system of a vehicle, the diagnostic system having one or more modules, comprising the steps of:
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(a) determining a number of pieces of information received from one or more modules using a first communications protocol;
(b) determining a number of pieces of information received from the one or more modules using a second communications protocol; and
(c) selecting from the plurality of communications protocols a communications protocol to use for communications between the off-board device and the diagnostic system using at least the number of pieces of information received from the one or more modules using the first communications protocol and the number of pieces of information received from the one or more modules using the second communications protocol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification