C11B174 - TroubleshootingC11B174-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
C11B174	Left actuator PBC failure - slipping when clamping左侧执行器PBC故障-夹紧时打滑	1. The increase in clamping force cannot be detected when the EPB caliper is clamped.1.EPB卡钳夹紧时无法检测到夹紧力的提升

Troubleshooting steps故障诊断步骤

①General inspection一般检查

1. Power status is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”,断开蓄电池负极。 2. Check whether the brake disc, brake pad, and left rear wheel actuator are assembled normally.检查制动盘、刹车片、左后轮执行机构的装配是否正常。 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 Reassemble.重新装配。

②Clear fault codes清除故障码

1. Clear the fault code, power on the vehicle again, perform clamping operation, and check whether the fault code and symptoms are eliminated.清除故障码，车辆重新上电进行夹紧操作，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 3.去步骤3。

③Replacement of motor-integrated left rear caliper更换电机集成式左后卡钳

1. Replace the new motor-integrated left rear caliper and check whether the fault code and symptoms are eliminated.更换新的电机集成式左后卡钳，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 4.去步骤4。

④Replace electronic parking control unit更换电子驻车控制单元

1. Replace the electronic parking control unit with a new one and check whether the fault code and symptoms are eliminated.更换新的电子驻车控制单元，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 electronic parking control unit, you need to use a diagnostic tool to recalibrate the electronic parking control unit.更换电子驻车控制单元后，需用诊断仪对电子驻车控制单元重新标定。