Vehicle Diagnostic Scan Comparison for OEM-Equivalent DTC Results
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Solution Overview
Problem
Existing vehicle diagnostic systems require costly and time-consuming OEM scans, which may need to be repeated, while aftermarket scans lack assurance of providing comparable results, leading to inefficiencies and additional costs.
Innovation Solution
A vehicle diagnostic system that performs both OEM and aftermarket scans concurrently, with the aftermarket scan being a subset of the OEM scan, and statistically analyzes the results to ensure equivalence, allowing for potential monetary and time savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only OEM scan programs are used, then diagnostic accuracy and certification validity are ensured, but cost and time consumption increase
Solution Approach 1:
The diagnostic scan process is segmented into two parts: an aftermarket scan program that performs a preliminary subset of ECUs for quick diagnosis, and an OEM scan program that completes the full diagnostic process. This segmentation allows the system to achieve both speed (through the aftermarket scan) and reliability (through the complete OEM scan), resolving the contradiction between diagnostic accuracy and time consumption.
2Productivity
If aftermarket scan programs are used, then scan speed and cost are improved, but result reliability and comparability to OEM scans deteriorate
Solution Approach 1:
The system merges the aftermarket scan program and the OEM scan program into a unified diagnostic process. The aftermarket scan is not used in isolation but is combined with the OEM scan, where the results of both are integrated and statistically analyzed. This merging ensures that the speed benefit of the aftermarket scan is achieved while maintaining the reliability and comparability of OEM scan results.
Solution Approach 2:
The system implements feedback by statistically analyzing and comparing the results of the aftermarket scan against the OEM scan results. This feedback mechanism verifies that the aftermarket scan produces comparable results to the OEM scan, thereby maintaining reliability while achieving improved productivity through the use of the faster aftermarket scan.
3Reliability
If OEM scans are performed repeatedly, then diagnostic thoroughness is maintained, but cost and time efficiency decrease
Solution Approach 1:
The aftermarket scan program performs a preliminary diagnostic action by scanning a subset of ECUs before the complete OEM scan. This preliminary action identifies obvious issues quickly and determines whether a full OEM scan is necessary, thereby maintaining diagnostic thoroughness while improving cost efficiency by avoiding redundant full scans.
Data Source
AI summary
A method and system for assessing a vehicle electronic system. A vehicle diagnostic system comprises a vehicle diagnostic computer tool configured to operate in a mode to scan a vehicle for diagnostic trouble codes (DTCs). The vehicle diagnostic computer tool is connected with a diagnostic port of the vehicle to be in communication with an electronic system of the vehicle. The DTCs are reported by the vehicle's electronic system. An aftermarket diagnostic scan program is run to scan for DTCs, and the scan data acquired by the aftermarket diagnostic scan program is recorded. An original equipment manufacturer (OEM) diagnostic scan program is run to scan for DTCs, and the scan data acquired by the OEM diagnostic scan program is recorded. The scan data acquired by the aftermarket diagnostic scan program is compared to the scan data acquired by the OEM diagnostic scan program.