GUIDE / OBD-II
结合工况理解燃油修正
燃油修正反映控制器对喷油的补偿。在所引 Ford 示例中，正值表示增加燃油，负值表示减少燃油。短期和长期读数须结合工况、对应气缸列及该车诊断流程理解；单个数值不能确定损坏零件。
更换零件之前
记录报码及冻结帧，检查蓄电池状态、相关报码和可见的线束或软管损伤。按照该车诊断流程和测试结果决定维修，避免仅凭故障码换件。
扫描记录表 →有原厂依据的故障码释义
来源与解读范围
先理解含义，再核对所引原厂页码。通用参考说明和限定车型案例的适用范围不同，采用维修指令前须确认具体应用。
- 2000 Powertrain Control/Emissions Diagnosis — Villager OBDII, Description and Operation ↗
Ford Motor Company · PDF 15, 17
2000 Mercury Villager example: adaptive fuel compensation, short/long-term percentages and positive versus negative correction direction; examples include vacuum leaks and injector faults. Printed pages 1-15 and 1-17. Background terminology, not diagnostic thresholds or a repair rule for other vehicles.
- 2024–2025 MY OBD System Operation Summary for Gasoline Engines — revision April 16, 2024 ↗
Ford Motor Company · PDF 22, 23
Ford gasoline monitor examples with trim-cell, coolant-temperature, closed-loop and stability conditions show why readings require operating context. Calibration-specific background; the example limits are not universal thresholds.