B310111 - TroubleshootingB310111-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
B310111	Front and rear door hidden door handle folding output short circuit前后门隐藏式门把手折叠输出短路	1. The door handle wiring harness is abnormal1.门把手线束异常
		2. Abnormal door handle2.门把手异常

Troubleshooting steps故障诊断步骤

①General inspection (take the left front door control module failure report as an example)一般检查(以报左前门控制模块故障为例)
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 left front/left rear door outer handle harness for damage, breakage, etc.检查左前/左后门外把手线束是否存在损坏、断裂等现象。 3. Check the left front/left rear door outer handle harness connector for damage or loose connection.检查左前/左后门外把手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 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。
②Check left front door outer handle folding harness检查左前门外把手折叠线束
	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 left front door outer handle harness connector FL19 and the left front door control module harness connector FL18.断开左前门外把手线束接插件FL19和左前门控制模块线束接插件FL18。 3. Use a multimeter to measure the resistance between pin 3/4 of FL19 and ground.使用万用表测量FL19的3/4号针脚与接地之间的电阻。 Standard resistance value: >1M标准电阻值：＞1M Ω
	d. Connect the negative terminal of the 12V battery, and the power status is "ON".d.连接蓄电池负极，电源状态“ON”。 e. Use a multimeter to measure the voltage between pin 3/4 of FL19 and ground.e.使用万用表测量FL19的3/4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 3.去步骤3。 No否 Repair or replace the faulty wiring harness.维修或更换故障线束。
③Check left rear door outer handle folding harness检查左后门外把手折叠线束
	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 left rear door outer handle harness connector RL06 and the left front door control module harness connector FL18.断开左后门外把手线束接插件RL06和左前门控制模块线束接插件FL18。 3. Use a multimeter to measure the resistance between pin 3/4 of RL06 and ground.使用万用表测量RL06的3/4号针脚与接地之间的电阻。 Standard resistance value: >1M标准电阻值：＞1M Ω
	d. Connect the negative terminal of the 12V battery, and the power status is "ON".d.连接蓄电池负极，电源状态“ON”。 e. Use a multimeter to measure the voltage between pin 3/4 of RL06 and ground.e.使用万用表测量RL06的3/4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。
④Check left front/left rear door outer handle检查左前/左后门外把手
1. Replace the left front/left rear door outer handle with a new one, and check whether the fault code and symptoms are eliminated.更换新的左前/左后门外把手，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 left front door control module更换左前门控制模块
1. Replace the left front door control module with a new one and check whether the fault code and symptoms are eliminated.更换新的左前门控制模块，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 left front door control module, you need to use a diagnostic tool to recalibrate the left front door control module.更换左前门控制模块后，需用诊断仪对左前门控制模块重新标定。