Engine Oil Pressure Switch - Test
本步骤用来测试发动机机油压力开关是否正常工作。
- 将点火开关转到接通位置，但不起动发动机。 发动机机油压力低的警告灯应点亮。
若警告灯未点亮，则检查警告灯的电路或者发动机机油压力开关电路是否存在短路或断路。 检查警告灯的灯泡是否损坏。
若电路正常，更换发动机机油压力开关。 在进行完电路维修或者发动机机油压力开关或警告灯的更换之后，请重新执行此步骤以确保警告灯点亮。
- 将发动机机油压力开关从缸体上拆下。 从发动机机油压力开关的线束上断开导线接头。 使用一个 12 V 的蓄电池作为电源。 将蓄电池接线端、发动机机油压力开关和 6V-7070 数字万用表的导线串联。 测量通过发动机机油压力开关的电流。
- 电流应在 0.30 到 0.40 安培之间。 若通过发动机机油压力开关的电流大于 0.42 安培，更换发动机机油压力开关。
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