0084-02 Vehicle Speed signal invalid (36)
产生此代码的情况:
发动机控制模块 (ECM) 检测到以下情况：
- "VSL 保护"未编程设定在设定后的 "TEL" 上。
- 车速在发动机参数指示车速应变化时恒定。
- 发动机转速高于 950 rpm 超过 60 ms。
注: 该代码通常在有人干预车速信号后出现。
系统响应:
发动机转速限定在编程设定的 "VSL 保护"上一小时。 如果 ECM 提供转速表信号的话，则车辆行驶后发生故障时转速表可反映车速的缺失。
该故障诊断代码为激活状态时，卡特彼勒电子技师 (ET) 状态屏上"发动机转速"旁边将显示"诊断"。
驾驶员可能认为发动机功率偏低，并且发动机不能达到期望转速。 额定功率下降工况一直保持到不存在该故障后的一小时内。
测试步骤 1. 进行以下的诊断步骤: 车速和车速表电路 - 测试
结果:
- 正常 - 停止
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