C166171 - TroubleshootingC166171-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
C166171	There is a fault in the internal protection system and the EPS friction is too large内部保护系统存在故障，EPS摩擦过大	1. Excessive friction caused by external environment1.外部环境导致摩擦过大
		2. Mechanical stuck2.机械卡滞

Troubleshooting steps故障诊断步骤

①Check vehicle tire pressure检查车辆胎压

1. Check whether the vehicle tire pressure is normal.检查车辆胎压是否正常。 Are the test results normal?检查结果是否正常？ Yes是 Go to step 2.去步骤2。 No否 Adjust tire pressure to normal.将胎压调整至正常状态。

②Check vehicle chassis and suspension检查车辆底盘与悬架

1. Check the vehicle chassis and suspension for loose bolts, deformation, damage, etc.检查车辆底盘与悬架是否存在螺栓松动、变形、损坏等现象。 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 Repair or replace faulty parts.维修或更换故障部件。

③Check mechanical steering gear assembly检查机械转向器总成

1. Check the mechanical steering gear assembly for water intrusion, deformation, corrosion, jamming, damage, etc.检查机械转向器总成是否存在进水、变形、锈蚀、卡滞、损坏等现象。 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 Replace the mechanical steering gear assembly.更换机械转向器总成。

④Check steering intermediate shaft检查转向中间轴

1. Check whether the steering intermediate shaft is deformed, stuck, damaged, etc.检查转向中间轴是否存在变形、卡滞、损坏等现象。 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 Replace the steering intermediate shaft.更换转向中间轴。

⑤Replace the electric power steering column更换电动助力转向管柱

1. 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： ♦  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。