0121-06 Low/High Retarder current high (14)
产生此代码的情况:
发动机控制模块 (ECM) 检测到以下情况：
- 发动机控制模块 (ECM) 在对 3 和 4 号缸电磁阀的通电尝试中检测到 1 秒的高电流状况（短路）。
- 发动机减速器开关位于低或高位置。
系统响应:
ECM 将记录诊断代码并触发快照。 该诊断代码为激活状态的同时，检查发动机指示灯亮起。
发动机减速器不能启动。
测试步骤 1. 进行以下的诊断步骤: 减速器（压缩制动器）电磁阀电路 - 测试
结果:
- 正常 - 停止
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