B321198 - TroubleshootingB321198-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
B321198	MCU overheatingMCU过温	1.MCU temperature is higher than 120 degrees1.MCU温度高于120度

Troubleshooting steps故障诊断步骤

①Power on check上电检查

After the vehicle has cooled down for a period of time, power it back on, use a diagnostic tool to read and clear the fault codes, and check whether the fault codes and symptoms are eliminated.车辆冷却一段时间后重新上电，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。

②Replace T-BOX更换T-BOX

Replace with a new T-BOX and check whether the fault code and symptoms are eliminated.更换新的T-BOX，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 T-BOX, you need to use a diagnostic instrument to recalibrate the T-BOX.更换T-BOX后，需用诊断仪对T-BOX重新标定。