Troubleshooting › Electric power steering system › Diagnosis
C166549-故障诊断 · T00625091

 C166549 - TroubleshootingC166549-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
C166549
There is a fault in the IG line and the IG line is abnormally disconnected.IG线存在故障，IG线异常断线
1.IG line broken1.IG线断线
Troubleshooting steps故障诊断步骤
①General inspection一般检查
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。
2. Check the electric power steering column harness for damage, breakage, loose connection, etc.检查电动助力转向管柱线束是否存在损坏、断裂、虚接等现象。
3. Check the electric power steering column harness connector for loose connection or damage.检查电动助力转向管柱线束接插件是否存在虚接、损坏等现象。
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 Repair or replace the electric power steering column harness or connector.维修或更换电动助力转向管柱线束或接插件。
②Check the electric power steering column IG1 power circuit检查电动助力转向管柱IG1电源线路
Graphic
1. Power status "ON".电源状态“ON”。
2. Use a digital multimeter to measure the voltage between pin 1 of the IP27 electric power steering column harness connector and ground.用数字万用表测量电动助力转向管柱线束接插件IP27的1号针脚与接地之间的电压。
Standard voltage value: about 14V标准电压值：约14V
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 the electric power steering column IG1 power harness.维修或更换电动助力转向管柱IG1电源线束。
③Replace 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。