Starting Aid - Test
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| 诊断代码 | |||
| 代码 | 说明 | 条件 | 备注 |
| 523544-3 | 空气加热器继电器驱动电路 + B 短路 | 当执行加热器继电器驱动指令时，蓄电池电压正常。 | 线束 + B 短路持续 1 秒或以上 警告级别 2 症状是起动故障和白烟增加。 |
| 523544-4 | 空气加热器继电器驱动电路对接地短路 | 当没有空气加热器继电器驱动指令时，蓄电池电压正常。 | 接地线束开路持续 1 秒或以上。 警告级别 2 症状是起动故障和白烟增加。 |
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| 故障诊断与排除测试步骤 | 数值 | 结果 |
|---|---|---|
1. 运行发动机，直到冷却液温度为 10 C (50 F) 或以上。 A. 检查 Cat® 电子技师 (ET) 中的“起动辅助继电器”。 B. 起动继电器系统的状态应为断开。 |
起动辅助继电器 |
结果：如果不正常，则检查导线线束和接头的导通性。 结果：如果正常，转至测试步骤 2。 |
2. 检查进气加热器继电器。 A. 断开冷却液温度接头。 B. 连接假负载电阻器（15 到 25 千欧）。 C. 这与 D. 检查 Cat ET，且起动辅助继电器应接通 |
进气加热器继电器 |
结果：如果不正常，则检查导线线束和接头的导通性。 结果：如果正常，转至测试步骤 3。 |
3. 测量进气继电器的信号和接地之间的电压。 |
电压 |
结果：·当继电器接通时，电压应等同于蓄电池电压。 结果：·当继电器断开时，电压应近似于 0 V。 |
4. 检查 + B 和主空气加热器继电器之间的导通性。 |
持续性 |
结果：当继电器接通时，应导通。 结果：当继电器断开时，应不导通。 |
Caterpillar Information System:
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