Troubleshooting › Drive motor › Diagnosis
P180017-故障诊断 · T00611706

 P180017 - TroubleshootingP180017-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
P180017
DCU low voltage power supply overvoltageDCU低压供电过压
1.DCDC output is abnormal1.DCDC输出不正常
2.MCU power supply voltage sampling circuit failure2.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 5.去步骤5。
No否 Go to step 3.去步骤3。
③Check 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 5.去步骤5。
No否 Go to step 4.去步骤4。
④Check 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 Discharge the 12V battery.对蓄电池进行放电。
No否 Inspect DCDC and its lines.检修DCDC及其线路。
⑤Replacing 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。