C166445 - TroubleshootingC166445-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
C166445	The NVRAM function of the Diag module is faulty, and the NVRAM function light of the Diag module is faulty.Diag模块NVRAM功能存在故障，Diag模块NVRAM功能灯故障	1.NVRAM read function failure1.NVRAM读取功能故障
		2.NVRAM write function failure2.NVRAM写功能故障
		3.NVRAM functional failure3.NVRAM功能故障

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 electric power steering column更换电动助力转向管柱

Replace the electric power steering column with a new one and check whether the fault code and symptoms are eliminated.更换新的电动助力转向管柱，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 electric power steering column, you need to use a diagnostic instrument to recalibrate the electric power steering column.更换电动助力转向管柱后，需用诊断仪对电动助力转向管柱重新标定。