P164200 - TroubleshootingP164200-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
P164200	External request for emergency high voltage power off外部请求紧急高压下电	1. The vehicle suffered a collision failure1.整车发生了碰撞故障

Troubleshooting steps故障诊断步骤

①Power on check上电检查

1. Power on the vehicle again and check whether the fault code and symptoms are eliminated.车辆重新上电，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 airbag system检查安全气囊系统

1. Check the vehicle for collision.检查车辆是否发生碰撞。 2. Check whether the airbag system is normal.检查安全气囊系统是否正常。 Are the test results normal?检查结果是否正常？ Yes是 Go to step 3.去步骤3。 No否 Overhaul the airbag system.检修安全气囊系统。

③Check vehicle control system检查整车控制系统

1. Check whether the vehicle control system is normal.检查整车控制系统是否正常。 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 Overhaul the vehicle control system.检修整车控制系统。

④Check the emergency power-off signal line检查紧急下电信号线路

1. Check whether the emergency power-off signal line is open or short-circuited.检查紧急下电信号线路是否开路、短路。 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 Repair or replace the emergency power-off signal wiring harness.维修或更换紧急下电信号线束。

⑤Replace the battery pack assembly更换电池组箱总成

1. Replace the battery pack assembly with a new one and check whether the fault code and symptoms are eliminated.更换新的电池组箱总成，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 battery pack assembly, you need to use a diagnostic tool to recalibrate the battery pack assembly.更换电池组箱总成后，需用诊断仪对电池组箱总成重新标定。