B212512 - TroubleshootingB212512-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
B212512	The rear left center sensor is faulty and the circuit is shorted to electricity.后左中传感器存在故障，电路对电短路	1. The signal line is short-circuited to the power supply or has no ground, or there is poor contact.1.信号线短路到电源或无地，或存在接触不良的情况

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 whether the parking sensor wiring harness is damaged or broken.检查中倒车雷达传感器线束是否存在损坏、断裂等现象。 3. Check whether there are loose connections or damage to the parking sensor harness connector.检查中倒车雷达传感器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 faulty wiring harness or connector.维修或更换故障线束或接插件。
②Power 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 3.去步骤3。
③Check the parking sensor signal circuit检查中倒车雷达传感器信号线路
	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 parking sensor harness connector RB10 and the parking sensor controller harness connector RB06.断开中倒车雷达传感器线束接插件RB10和倒车雷达控制器线束接插件RB06。 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 4 of the RB06 and ground.用数字万用表测量RB06的4号针脚与接地之间的电压。 Standard voltage value: about 0V标准电压值：约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 parking sensor signal harness.维修或更换中倒车雷达传感器信号线束。
④Replace the parking radar sensor更换中倒车雷达传感器
1. Replace the center and parking sensor with a new one, and check whether the fault code and symptoms are eliminated.更换新的中倒车雷达传感器，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。
⑤Replace the parking sensor controller更换倒车雷达控制器
1. Replace the parking sensor controller with a new one and check whether the fault code and symptoms are eliminated.更换新的倒车雷达控制器，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 parking sensor controller, you need to use a diagnostic tool to recalibrate the parking sensor controller.更换倒车雷达控制器后，需用诊断仪对倒车雷达控制器重新标定。