The smart ambient lights don’t turn on智能氛围灯都不亮

①Check the wiring harness connector检查线束接插件
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 integrated body control module wiring harness for damage, breakage, etc.检查集成式车身控制模块线束是否存在损坏、断裂等现象。 3. Check the integrated body control module wiring harness connector for loose connections or damage.检查集成式车身控制模块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 → Go to step 2.是>>去步骤2。 No → Repair or replace the faulty wiring harness or connector.否>>维修或更换故障线束或接插件。
②Check the vehicle infotainment head unit fault code检查车载智能多媒体主机故障码
1. Use the diagnostic tool to read the fault code of the infotainment head unit and check whether there is a fault in the infotainment head unit.使用诊断仪读取车载智能多媒体主机故障码，检查车载智能多媒体主机是否存在故障。 Are the test results normal?检查结果是否正常？ Yes → Go to step 3.是>>去步骤3。 No → Troubleshoot the fault of the vehicle-mounted intelligent multimedia host according to the fault code.否>>根据故障码排除车载智能多媒体主机故障。
③Check the touch control screen检查触摸控制屏
1. Check whether the touch control screen is working properly.检查触摸控制屏是否工作正常。 Are the test results normal?检查结果是否正常？ Yes → Go to step 4.是>>去步骤4。 No → Replace the touch control screen.否>>更换触摸控制屏。
④Check integrated body control module fault codes检查集成式车身控制模块故障码
1. Use the diagnostic tool to read the fault code of the integrated body control module and check whether there is a fault in the integrated body control module.使用诊断仪读取集成式车身控制模块故障码，检查集成式车身控制模块是否存在故障。 Are the test results normal?检查结果是否正常？ Yes → Go to step 5.是>>去步骤5。 No → Troubleshoot the integrated body control module fault according to the fault code.否>>根据故障码排除集成式车身控制模块故障。
⑤Check the ambient light power harness检查氛围灯电源线束
	1. The power status is "ON" and the ambient light function is turned on.电源状态“ON”，开启氛围灯功能。 2. Use a digital multimeter to measure the voltage between pin 26 of the integrated body control module harness connector BD56 and ground.用数字万用表测量集成式车身控制模块线束接插件BD56的26号针脚与接地之间的电压。 Standard voltage value: about 12V标准电压值：约12V Are the test results normal?检查结果是否正常？ Yes → Go to step 6.是>>去步骤6。 No → Repair or replace the ambient light power wiring harness.否>>维修或更换氛围灯电源线束。
⑥Check the ambient light LIN communication harness检查氛围灯LIN通讯线束
	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 driver's side footlight harness connector IP37 and the integrated body control module harness connector BD56.断开主驾驶侧足灯线束接插件IP37和集成式车身控制模块线束接插件BD56。 3. Use a digital multimeter to measure the resistance between pin 2 of the IP37 and pin 43 of the BD56.用数字万用表测量IP37的2号针脚与BD56的43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 → Go to step 7.是>>去步骤7。 No → Repair or replace the ambient light LIN communication harness.否>>维修或更换氛围灯LIN通讯线束。
⑦Replacing the integrated body control module更换集成式车身控制模块
1. Replace the integrated body control module and check whether the fault is eliminated.更换集成式车身控制模块，检查故障是否排除。 Are the test results normal?检查结果是否正常？ Yes → Fault resolved.是>>故障排除。 No → Find the cause from other fault symptoms.否>>从其他故障现象查找原因。   Caution:注意： ♦  After replacing the integrated body control module, you need to use a diagnostic tool to recalibrate the integrated body control module.更换集成式车身控制模块后，需用诊断仪对集成式车身控制模块重新标定。