Diagnostic Tool Protocol Auto-Detection for Volvo Vehicles
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Solution Overview
Problem
Modern vehicles employ diverse communication protocols for their diagnostic systems, making it challenging for diagnostic tools to effectively communicate with various models and modules, particularly in the case of Volvo vehicles where different protocols are used across models and modules.
Innovation Solution
A diagnostic tool equipped with a processor, memory, signal translator, and connector interface that automatically determines the communication protocol used by a Volvo vehicle's electronic control unit, allowing it to interface with the vehicle using multiple protocols such as ISO 9141-2, Keyword 2000, and CAN, ensuring successful communication regardless of the protocol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a diagnostic tool uses a single communication protocol, then the device complexity is reduced, but the adaptability to different Volvo models and modules is limited
Solution Approach 1:
The diagnostic tool incorporates multiple communication protocol interfaces (ISO 9141-2, Keyword 2000, and CAN protocols) within a single device, enabling it to universally communicate with various Volvo models and modules that use different protocols. This multi-functionality allows one tool to replace multiple specialized tools while managing complexity through integrated design.
2Ease of operation
If a diagnostic tool automatically determines the vehicle protocol, then the ease of operation is improved, but the device complexity increases due to protocol detection mechanisms
Solution Approach 1:
The diagnostic tool employs automatic protocol detection functionality that self-identifies the communication protocol being used by the connected Volvo vehicle or module. The system autonomously determines whether ISO 9141-2, Keyword 2000, or CAN protocol is in use without requiring manual configuration by the technician, thereby simplifying operation while the internal detection mechanisms manage the complexity.
3Productivity
If manual protocol selection is required, then the device complexity is reduced, but the productivity is decreased due to additional setup time
Solution Approach 1:
The diagnostic tool performs preliminary automatic protocol detection and configuration before the actual diagnostic process begins. By pre-identifying the communication protocol and setting up the appropriate communication parameters in advance, the system eliminates time-consuming manual setup during the diagnosis procedure, thereby improving productivity while the preliminary detection phase manages the necessary complexity.
Data Source
AI summary
A diagnostic tool and method are provided that can determine the communication protocol being used by diagnostic systems in a vehicle. The tool can automatically communicate with onboard computer of the diagnostic system in a first communication protocol and if unsuccessful, then can communicate with the diagnostic system in a second communication protocol. The tool can also determine the Baud rate of the communication protocol being used by the onboard computer.