Trunk and branch layout主干与分支
Locate trunk and branch datums from equipment fixing points. Allow room for mating, bends and servicing so branches do not transfer installation loads to contacts.以设备固定点确定主干和各支路的尺寸基准，预留插拔、弯曲和维护空间，避免支路把拉力传递到端子。
Automotive Diagnostic & OBD Harness汽车诊断与OBD线束
MPPS V18 ECU Test Branch HarnessMPPS V18 ECU测试分支线束
MPPS V18 ECU Test Branch Harness can be configured around equipment interfaces and routing. SAE J1962 and ISO 15031-3 define requirements for the standardized diagnostic connection between the vehicle and external test equipment, including connector design, contact allocation and related electrical circuits. The standardized shell can carry different physical layers and manufacturer-discretionary circuits.MPPS V18 ECU测试分支线束可围绕设备接口与安装路径进行配置。SAE J1962 与 ISO 15031-3 规定车辆与外部测试设备之间标准化诊断连接的要求，包括连接器设计、触点分配及相关电路。相同标准外壳中可能承载不同物理层和制造商自定义回路，因此线束必须保持已放行的针脚映射、屏蔽、线对结构、接地、供电能力与设备端接口，而不能只把外形匹配的壳体连在一起。
- Interface and circuit review接口与回路对应审核
- Length and installation configuration线长与安装结构定制
- Manufacture from approved sample样品确认后组织制造
CONSTRUCTION结构解析
Connection structure and design details连接结构与设计要点
Use the mpps v18 ecu test branch harness form as a starting point and confirm these design points against drawings and the actual equipment.以MPPS V18 ECU测试分支线束的结构形式为起点，结合图纸和实际设备确认以下设计要点。
Interface and function review接口与功能确认
An OBD interface does not guarantee all protocols or vehiclesOBD接口不保证全部协议或车型支持
Installation and acceptance安装与验收
Passive adaptation cannot convert protocols无源转接不能执行协议转换
CONFIGURATION结构与选配
Construction & customization options结构与定制配置
The table describes the construction and available configuration choices. Materials, dimensions, circuits and inspection requirements are agreed for each project.以下说明展示结构与可配置内容。具体材料、尺寸、电路和检验要求按项目确认。
| Vehicle year, diagnostic tool and target task车型年款、诊断工具与目标任务 | Identify the exact vehicle, year, tool and diagnostic task.按准确车型、年款、工具和诊断任务识别。 |
|---|---|
| OBD-side and tool-side pinoutOBD端与设备端针脚图 | Map vehicle and tool pins with defined connector views.车辆端和工具端逐针对应并写明视图。 |
| Power, ground and communication assignments电源、地及通信线定义 | Record power, ground and communication functions separately.电源、地和通信功能分开记录。 |
| Presence of active conversion and vehicle-side protection是否含电子转换与车端保护 | Define passive wiring, active conversion and protection boundaries.无源接线、主动转换与保护器件说明边界。 |
| Circuit and revision reference电路与版本依据 | Provide vehicle make, model, year and market; target diagnostic or data task; vehicle-side connector and access space; exact device or tool interface; released pin map and protocol; power source and current; cable length and exit direction; shielding and termination requirements; whether another device must remain connected; environmental exposure; quantity; labels; and required inspection or functional checks.请提供车辆品牌、车型、年份和市场；目标诊断或数据任务；车辆端接口及安装空间；准确设备或工具接口；已放行针脚表与协议；供电来源及电流；线长与出线方向；屏蔽和端接要求；是否需要保留另一设备同时连接；环境暴露；数量；标签以及所需检验或功能检查。 |
| Sample and manufacturing configuration样品与制造配置 | We can develop from a controlled drawing, verified sample, connector part numbers or an approved interface schedule. Before sampling, the vehicle-side and device-side identities, power routing, signal conductors, grounds, shields, branch behavior and mechanical envelope are frozen.可依据受控图纸、已验证样品、连接器型号或批准的接口表进行开发。打样前冻结车辆端与设备端身份、供电路径、信号导体、接地、屏蔽、分支行为及机械边界。 |
APPLICATIONS连接的应用
Application directions应用方向
These are connection directions for project discussion. Suitability depends on interfaces, circuits, installation conditions and project validation; configuration can be adapted to the equipment.以下为可讨论的连接方向。实际适用性取决于接口、电路、安装环境和项目验证，可按设备需求调整。
Vehicle diagnostic access车辆诊断接入
Use the exact vehicle, tool and task to define wiring. Identify the exact vehicle, year, tool and diagnostic task.准确车型、工具与任务共同决定接线配置。选配时，按准确车型、年款、工具和诊断任务识别。
Data logging and device access数据记录与设备接入
Review stub length, power and network effects together. Map vehicle and tool pins with defined connector views.分支长度、供电与网络影响需同时审核。选配时，车辆端和工具端逐针对应并写明视图。
Cabin routing for service interfaces服务接口的车内路径
Define extension length, fixing points and end orientation from the cabin installation position, space behind panels and service sequence. Record power, ground and communication functions separately.延伸接口需结合车内安装位置、面板后空间和检修顺序确定线长、固定点及端头朝向。选配时，电源、地和通信功能分开记录。
OBD device powerOBD设备供电
Review power pickup, protection and vehicle-sleep effects in the project. Define passive wiring, active conversion and protection boundaries.取电位置、保护和车辆休眠影响应在项目中核对。选配时，无源接线、主动转换与保护器件说明边界。
Tool-end mating and dimensional review工具端配合与尺寸确认
For a tool-side adapter, first compare contacts, housing and mating dimensions, then define the wire mapping from a confirmed pin table. Identify the exact vehicle, year, tool and diagnostic task.工具端转接先核对接点、外壳和配合尺寸，再用确认的针脚表定义转接线序。选配时，按准确车型、年款、工具和诊断任务识别。
Bench circuits and measurement access台架回路与测量接入
Define supply boundaries, pins, protection and measurement access for bench leads, then check each circuit against the confirmed circuit definition. Map vehicle and tool pins with defined connector views.台架引线需明确电源边界、针脚、保护方式与测量接入点，按确认电路逐回路检查。选配时，车辆端和工具端逐针对应并写明视图。
ENGINEERING & PRODUCTION工程与制造
Adapt the connection to your equipment.围绕设备，调整连接细节。
Touched by me, better it’ll beTouched by me, better it’ll be
Custom wire harness manufacturing in China中国工厂 · 定制线束制造
Our China factory supports automotive diagnostic & obd harness projects through custom wire harness manufacturing and OEM/ODM development. Interface, circuit and installation data guide material selection, sample builds and manufacturing-document approval before repeat production.Super Smile-Tech 中国工厂围绕汽车诊断与OBD线束的项目需求提供定制线束制造与 OEM/ODM 支持。我们从接口、电路与安装资料开始，协同物料选配、样品制作和制造文件确认，再按批准要求组织重复生产。
Vehicle year, diagnostic tool and target task车型年款、诊断工具与目标任务
Identify the exact vehicle, year, tool and diagnostic task.按准确车型、年款、工具和诊断任务识别。
OBD-side and tool-side pinoutOBD端与设备端针脚图
Map vehicle and tool pins with defined connector views.车辆端和工具端逐针对应并写明视图。
Presence of active conversion and vehicle-side protection是否含电子转换与车端保护
Define passive wiring, active conversion and protection boundaries.无源接线、主动转换与保护器件说明边界。
PRODUCT QUESTIONS产品问答
Product & customization questions产品与定制常见问题
Does every 16-pin OBD connector have the same wiring?所有 16 针 OBD 接口的线路都一样吗？
No. The standardized connector defines controlled functions and leaves some contacts for manufacturer discretion. Vehicle generation, market, protocol and target task still determine the released pin map.不一样。标准化接口定义受控功能，同时保留部分制造商自定义触点；车辆代际、市场、协议和目标任务仍决定最终针脚表。
Can you make a full 16-core male-to-female extension?可以制作全针 16 芯公对母延长线吗？
Yes, after confirming connector type, orientation, all pin-to-pin circuits, conductor sizes, length, exit direction and intended use. A fully populated extension can also pass manufacturer-specific circuits, so the application still matters.可以，但需确认连接器类型、方向、全部针对针回路、导体截面积、长度、出线与用途。全针延长线也会传递制造商自定义回路，因此仍需明确应用。
Will an OBD-to-DB9 or OBD-to-RJ45 cable work with any tool?OBD 转 DB9 或 OBD 转 RJ45 线能兼容任何设备吗？
No. DB9 and RJ45 describe connector families, not a universal diagnostic contact assignment. The exact tool model and approved device-side pinout are required.不能。DB9 与 RJ45 只是连接器家族，并不代表通用诊断针脚；必须提供准确设备型号和批准的设备端针脚。
Start with your interface and installation requirements从您的接口与安装需求开始
Share mating interfaces, a circuit table, target lengths or a sample for the mpps v18 ecu test branch harness. We can use them to review configuration and sample requirements.提供MPPS V18 ECU测试分支线束的对插接口、回路表、目标长度或参考样品，我们据此梳理选配与样品确认事项。