B2C3477 - TroubleshootingB2C3477-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
B2C3477	Self-priming motor release failure自吸电机释放失败	1. The self-priming lock release action requirements are met, but the self-priming lock is not released; the unlocking conditions are met, but the unlocking is not successful.1.满足自吸锁释放动作要求，但自吸锁未释放；满足解锁条件，但未解锁成功

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 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 the hatchback door lock wiring harness for damage, breakage, etc.检查掀背门锁线束是否存在损坏、断裂等现象。 3. Check the hatchback door lock wiring harness connector for damage, loose connection, etc.检查掀背门锁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 lock status feedback harness检查锁状态反馈线束
	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 liftgate lock harness connector TG20 and the power liftgate module harness connector BD89.断开掀背门锁线束接插件TG20和电动掀背门模块线束接插件BD89。 3. Use a digital multimeter to measure the resistance between pin 3/6 of TG20 and pin 9/21 of BD89.使用数字万用表测量TG20的3/6号针脚与BD89的9/21号针脚之间的电阻。 Standard resistance value: <1标准电阻值：＜1 Ω 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 hatchback door lock更换掀背门锁
1. Replace the hatchback door lock with a new one and check whether the fault code and symptoms are eliminated.更换新的掀背门锁，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 power liftgate module更换电动掀背门模块
1. Replace the electric hatchback door module with a new one and check whether the fault code and symptoms are eliminated.更换新的电动掀背门模块，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 liftgate module, you need to use a diagnostic tool to recalibrate the electric liftgate module.更换电动掀背门模块后，需用诊断仪对电动掀背门模块重新标定。