B370549 - TroubleshootingB370549-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
B370549	INU hardware fault, internal electronic failureINU硬件存在故障，内部电子故障	1. The combined inertial navigation positioning module is damaged.1.组合惯导定位模块损坏

Troubleshooting steps故障诊断步骤

①Power on check上电检查

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。

②Replace the combined inertial navigation module更换组合惯性导航模块

Replace with a new combined inertial navigation module and check whether the fault code and symptoms are eliminated.更换新的组合惯性导航模块，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：

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After replacing the integrated inertial navigation module, you need to use a diagnostic instrument to recalibrate the integrated inertial navigation module.更换组合惯性导航模块后，需用诊断仪对组合惯性导航模块重新标定。