The second is to check if the self-diagnostic system is working normally before extracting failure code;

三是提取故障码之前，应首先确认自诊断系统是否正常；

youdao

The second is to check if the self-diagnostic system is working normally before extracting failure code;

三是提取故障码之前，应首先确认自诊断系统是否正常；

youdao