Detail of GB/T 19910-2022

Introduction of GB/T 19910-2022

This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization—Part 1: Rules for the structure and drafting of standardizing documents. This document replaces GB/T 19910-2005 Technical requirements for electronic control system of motor-vehicles engine being overhauled. In addition to structural adjustments and editorial changes, the following main technical changes have been made with respect GB/T 19910-2005: a) The statement for “scope” is modified (see Clause 1 hereof; Clause 1 of Edition 2005); b) The term “engine electronic control system” and its definition are modified (see 3.1 hereof; 3.1 of Edition 2005); c) The terms "intake and exhaust control system", "fuel control system", "computer control system" and "self-diagnosis function" and their definitions are deleted (see 3.2 to 3.5 of Edition 2005); d) The terms "over-the-air upgrade", "freeze data", "signal wave form", "on vehicle status" and "off vehicle status" and their definitions are added (see 3.2 to 3.6 hereof); e) The clause “abbreviations” is added (see Clause 4); f) The requirement of “inspection before maintenance” is deleted (see 4.1 of Edition 2005); g) The requirement of "maintenance as appropriate" is deleted (see 4.2 of Edition 2005); h) The requirement of "inspection after maintenance" is deleted (see 4.3 of Edition 2005); i) The requirement of “general requirements” is added (see Clause 5 hereof); j) The requirement of “operation procedure” is added (see Clause 6 hereof); k) The requirement of "incoming inspection" is added (see Clause 7 hereof); l) The requirement of “technology requirements of operation” is added” (see Clause 8 hereof); m) The requirement of “test on completion” is added (see Clause 9 hereof); n) The requirement of “quality assurance period” is added (see Clause 10 hereof). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This document was proposed by the Ministry of Transport of the People's Republic of China. This document is under the jurisdiction of the National Technical Committee of Automobile Maintenance and Repair Standardization (SAC/TC 247). This document was firstly issued in 2005; and this edition is the first revision. Technical requirements for repair of automotive engine electronic control system 1 Scope This document specifies the general requirements, operation procedure, incoming inspection, technology requirements of operation, test on completion and quality assurance period for repair of automotive engine electronic control system. This document is applicable to the repair of automotive engine electronic control system, and and may be used as a reference for the repair of engine electronic control system of other types of vehicles. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 5624 Motor vehicle maintenance and repair terms JT/T 816 Service specification for motor vehicle maintenance QC/T 29106 Technical specification of automobile wire harness 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 5624 and the following apply. 3.1 engine electronic control system system for analyzing and processing various parameters in engine operation to accurately control the engine working condition according to the information of each sensor 3.2 over-the-air upgrade technology for wireless downloading or updating the automobile software and or modifying the corresponding settings of the automobile through a mobile network terminal device 3.3 freeze data instantaneous operation data of the engine recorded by the electronic control unit (ECU) when the fault indicator light is turned on 3.4 signal wave form graph of signal parameters changing with time 3.5 on vehicle status status in which components are not removed from the vehicle 3.6 off vehicle status status in which components are removed from the vehicle 4 Abbreviations For the purposes of this document, the following abbreviations apply. ECU: electronic control unit KOEO: key on engine off KOER: key on engine run OBD: on board diagnostics OTA: over-the air technology

Contents of GB/T 19910-2022

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Abbreviations 5 General requirements 6 Operation procedure 7 Incoming inspection 8 Technology requirements of operation 9 Test on completion 10 Quality assurance period Annex A (Informative) Record of incoming inspection Annex B (Informative) Repair construction sheet Annex C (Informative) Records of repair work and process inspection Annex D (Informative) Record of repair as-built inspection