Troubleshooting › Brake control system › Diagnosis
C15C009-故障诊断 · T00612512

 C15C009 - TroubleshootingC15C009-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
C15C009
EPB left caliper failure-OtherCycleEPB左卡钳失效-OtherCycle
1. The wiring harness pin connecting the left caliper motor to the ECU is short-circuited to the adjacent power line.1.左侧卡钳电机连接至ECU的线束插针与相邻的电源线短路
2. The wiring harness is damaged, squeezed by other components, bent, etc. and is short-circuited with the power cord.2.线束损坏、被其他组件挤压、弯曲等情况与电源线短路
3. The metal pins of the connector are corroded, impurities or bent, causing a short circuit with the power cord.3.接插件的金属插针存在腐蚀、杂质或弯曲导致与电源线短路
4. The negative voltage of the motor exceeds the normal range (normal value 3.8V-4.2V)4.电机负极电压超出正常范围（正常值3.8V-4.2V）
Troubleshooting steps故障诊断步骤
①Power on check上电检查
1. 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。
②General 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 motor-integrated left rear caliper wiring harness for damage, breakage, etc.检查电机集成式左后卡钳线束是否存在损坏、断裂等现象。
3. Check the motor-integrated left rear caliper harness connector for damage, loose connection, etc.检查电机集成式左后卡钳线束接插件是否存在损坏、虚接等现象。
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 wiring harness or connector.维修或更换故障线束或接插件。
③Check the motor-integrated left rear caliper wiring harness检查电机集成式左后卡钳线束
Graphic
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. Disconnect the integrated brake control unit harness connector FB47 and the motor-integrated left rear caliper harness connector CA02.断开集成式制动控制单元线束接插件FB47和电机集成式左后卡钳线束接插件CA02。
3. Connect the negative terminal of the 12V battery and the power status is "ON".连接蓄电池负极，电源状态“ON”。
4. Use a digital multimeter to measure the voltage between pin 5/6 of FB47 and ground.使用数字万用表测量FB47的5/6号针脚与接地之间的电压。
Standard voltage value: 0V标准电压值：0V
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 Repair or replace the faulty wiring harness.维修或更换故障线束。
④Replace the motor-integrated left rear caliper assembly更换电机集成式左后卡钳总成
1. Replace the motor-integrated left rear caliper assembly with a new one, and check whether the fault code and symptoms are eliminated.更换新的电机集成式左后卡钳总成，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 5.去步骤5。
⑤Replacing the integrated brake control unit更换集成式制动控制单元
1. Replace with a new integrated brake control unit and check whether the fault code and symptoms are eliminated.更换新的集成式制动控制单元，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 integrated brake control unit, you need to use a diagnostic tool to recalibrate the integrated brake control unit.更换集成式制动控制单元后，需用诊断仪对集成式制动控制单元重新标定。
♦  After replacing the integrated brake control unit, the brake line bleeding operation is required.更换集成式制动控制单元后，需进行制动管路排气操作。