GUIDE / OBD-II
配合工況理解燃油修正
燃油修正反映控制器對噴油的補償。在所引 Ford 範例中，正值表示增加燃油，負值表示減少燃油。短期與長期讀值須結合工況、對應汽缸列及該車診斷程序理解；單一數值不能確定損壞零件。
更換零件之前
記錄故障碼與凍結資料，檢查電瓶狀態、相關故障碼和可見線束或軟管損傷。依該車診斷程序與測試結果決定維修，避免僅憑故障碼換件。
掃描記錄表 →有原廠依據的故障碼釋義
來源與解讀範圍
先理解含義，再核對引用的原廠頁碼。參考說明與限定車型案例範圍不同，採用維修指令前須確認應用。
- 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.