ECM Memory - Test
系统运作描述:
此步骤涉及以下诊断代码：
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| ECM 软件故障诊断代码 | ||
| J1939 代码 | 说明 | 备注 |
| 631-2 | 标定模块：不稳定、间歇或不正确 | 电子控制模块（ECM）检测到不正确的发动机软件。 如配有警告灯，警告灯将点亮。 没有记录该诊断代码。 清除此诊断代码需要出厂密码。 发动机将无法起动。 ECM 中的闪存文件来自于错误的发动机系列。 |
测试步骤 1. 修理该故障。
确定激活的故障诊断代码。
预期结果:
631-2 诊断代码为激活状态。
结果:
- 631-2 代码为激活状态 -
修复: 获取发动机生产序号。 使用 SIS Web 确定发动机可用的最新闪存文件。 核实 ECM 中加载了最新的可用闪存文件。如有必要，使用电子维修工具将正确的闪存文件安装至 ECM。 请参阅故障排除指南, "闪存编程"。
停止
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