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P180016-故障诊断 · T00611707

 P180016 - TroubleshootingP180016-故障诊断

Fault code description故障码说明
DTC故障码(DTC)
Fault code description故障码描述
Possible cause of failure可能故障原因
P180016
DCU low voltage power supply undervoltageDCU低压供电欠压
1. 12V battery drained, or large voltage fluctuation1.蓄电池馈电或电压波动大
2. The MCU low-voltage power supply harness has poor contact or the pins have fallen off.2.MCU低压供电线束接触不良或退针脱落
3. MCU power supply voltage sampling circuit failure3.MCU供电电压采样电路故障
Troubleshooting steps故障诊断步骤
①Power on check上电检查
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。
Are the test results normal?检查结果是否正常？
Yes是 Fault resolved.故障排除。
No否 Go to step 2.去步骤2。
②Check low voltage supply voltage检查低压供电电压
1. Read the DID low-voltage power supply voltage value and check whether the low-voltage power supply voltage is normal.读取DID低压供电电压数值，检查低压供电电压是否正常。
Are the test results normal?检查结果是否正常？
Yes是 Go to step 7.去步骤7。
No否 Go to step 3.去步骤3。
③Check wiring harness and connectors检查线束及接插件
1. Power status is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”,断开蓄电池负极。
2. Check whether the integrated electric drive assembly wiring harness is damaged or broken.检查集成电力驱动总成线束是否存在损坏、断裂等现象。
3. Check the integrated electric drive assembly wiring harness connector for loose connection or damage.检查集成电力驱动总成线束接插件是否存在虚接、损坏等现象。
Are the test results normal?检查结果是否正常？
Yes是 Go to step 4.去步骤4。
No否 Repair or replace faulty wiring harness or connector.维修或更换故障线束或接插件。
④Check 12V battery voltage检查蓄电池电压
1. Power status is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”,断开蓄电池负极。
2. Use a digital multimeter to measure the voltage between the positive and negative terminals of the 12V battery.用数字万用表测量蓄电池正、负极之间的电压。
Standard voltage value: about 12.5V标准电压值：约12.5V
Are the test results normal?检查结果是否正常？
Yes是 Go to step 6.去步骤6。
No否 Go to step 5.去步骤5。
⑤Check DCDC output voltage检查DCDC输出电压
1. The vehicle is powered on.车辆上电。
2. Use a digital multimeter to measure the voltage between the positive and negative terminals of the 12V battery.用数字万用表测量蓄电池正、负极之间的电压。
Standard voltage value: about 14V标准电压值：约14V
Are the test results normal?检查结果是否正常？
Yes是 Charge the 12V battery and replace it if necessary.对蓄电池进行充电，必要时更换蓄电池。
No否 Inspect DCDC and its lines.检修DCDC及其线路。
⑥Check the low-voltage power supply line of the integrated electric drive assembly检查集成电力驱动总成低压供电线路
1. Check whether the low-voltage power supply line of the integrated electric drive assembly is normal.检查集成电力驱动总成低压供电线路是否正常。
Are the test results normal?检查结果是否正常？
Yes是 Go to step 7.去步骤7。
No否 Repair or replace the faulty wiring harness.维修或更换故障线束。
⑦Replacing the integrated electric drive assembly更换集成电力驱动总成
1. Replace the integrated electric drive assembly with a new one and check whether the fault code and symptoms are eliminated.更换新的集成电力驱动总成，检查故障码及症状是否排除。
Are the test results normal?检查结果是否正常？
Yes是 Fault resolved.故障排除。
No否 Look for causes from other symptoms.从其他症状查找原因。
  Caution:注意：
♦  After replacing the integrated electric drive assembly, you need to use a diagnostic tool to recalibrate the integrated electric drive assembly.更换集成电力驱动总成后，需用诊断仪对集成电力驱动总成重新标定。