Wiring Harness (Open Circuit) - Test
开路故障会导致电流中断。 造成开路的原因有：
- 连接不良
- 导线断裂
开路测试
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| 故障诊断与排除步骤 | 数值 | 结果 |
|---|---|---|
1. 确定开路 A. 确定可疑电路中的接头和导线。 使用机器电气示意图。 B. 切断钥匙开关和断路开关。 C. 从线束上断开部件和 ECM。 D. 在一个断开的线束接头处，将一根跨接导线连在可疑导线触点与机架接地之间。 E. 在线束的其他接头处，测量可疑导线触点和机架接地之间的电阻。 (1) 字样。 |
< 5 Ω | 正常 - 电阻 < 5 Ω。 电路没有断路。 止动块 不正常 - 电阻 ≥ 5K Ω。 电路开路 (2) 字样。 修理： 修理或更换线束。 止动块 |
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| ( 1 ) | 使用经过标定的数字万用表执行此项检查。 |
| ( 2 ) | 电阻 ≥ 5 Ω 但 < 5K Ω 表示连接松动或腐蚀。 电阻 ≥ 5K Ω 表示存在开路。 |
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