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ISO 9141:1989 Road vehicles - Diagnostic systems - Requirements for interchange of digital information
standard by International Organization for Standardization, 10/01/1989
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Specifies the requirements for setting up the interchange of digital information between on-board Electronic Control Units (ECUs) of road vehicles and suitable diagnostic testers. This communication is established in order to facilitate inspection, test diagnosis and adjustment of vehicles, systems and ECUs. Does not apply when system-specific diagnostic test equipment is used.