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①Power on check上电检查
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1. |
Repower the vehicle, use the diagnostic tool to read and clear the fault codes, and check whether the fault codes and symptoms are eliminated.车辆重新上电，使用诊断仪读取并清除故障码，检查故障码及症状是否排除。
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Are the test results normal?检查结果是否正常？
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Yes是 |
Fault resolved.故障排除。 |
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②Check your surroundings检查周围环境
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1. |
Check the surrounding environment for the presence of magnetic fields.检查周围环境是否存在磁场。
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Are the test results normal?检查结果是否正常？
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No否 |
Drive away from the current situation.驶离当前所处环境。 |
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③Check wiring harness and connectors检查线束及接插件
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1. |
Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。
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2. |
Check whether the private CAN communication harness is damaged or broken.检查私有CAN通讯线束是否存在损坏、断裂等现象。
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3. |
Check the private CAN communication harness connector for loose connections or damage.检查私有CAN通讯线束接插件是否存在虚接、损坏等现象。
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Are the test results normal?检查结果是否正常？
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No否 |
Repair or replace faulty wiring harness or connector.维修或更换故障线束或接插件。 |
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④Check private CAN communication waveform检查私有CAN通讯波形
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1. |
Power status "OFF".电源状态“OFF”。
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2. |
Connect the oscilloscope.连接示波器。
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3. |
Power status "ON".电源状态“ON”。
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4. |
Use an oscilloscope to measure the waveforms of private CAN_H and private CAN_L.用示波器测量私有CAN_H和私有CAN_L的波形。
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Are the test results normal?检查结果是否正常？
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No否 |
Check the private CAN communication harness; if normal, go to step 5.检查私有CAN通讯线束；若正常，去步骤5。 |
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⑤Replace lane departure warning ECU更换车道偏离预警ECU
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1. |
Replace with a new lane departure warning ECU and check whether the fault code and symptoms are eliminated.更换新的车道偏离预警ECU，检查故障码及症状是否排除。
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Are the test results normal?检查结果是否正常？
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Yes是 |
Fault resolved.故障排除。 |
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No否 |
Look for causes from other symptoms.从其他症状查找原因。 |
Caution:注意： |
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♦
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After replacing the lane departure warning ECU, you need to use a diagnostic tool to recalibrate the lane departure warning ECU.更换车道偏离预警ECU后，需用诊断仪对车道偏离预警ECU重新标定。 |
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U1A0F88 - TroubleshootingU1A0F88-故障诊断