B2B3723 - TroubleshootingB2B3723-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
B2B3723	The driver's seat backrest forward motor adjustment control switch is stuck主驾座椅靠背向前电机调节控制开关粘连	1. Abnormal switch wiring harness1.开关线束异常
		2. Abnormal switch2.开关异常

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 whether the driver adjustment switch wiring harness is damaged or broken.检查主驾调节开关线束是否存在损坏、断裂等现象。 3. Check the driver adjustment switch harness connector for loose connection or damage.检查主驾调节开关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 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 driver's backrest motor adjustment switch wiring harness检查主驾靠背电机调节开关线束

1. Check whether the driver's backrest motor adjustment switch wiring harness is normal.检查主驾靠背电机调节开关线束是否正常。 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 driver-side adjustment switch更换主驾调节开关

1. Replace the driver-side adjustment switch with a new one and check whether the fault code and symptoms are eliminated.更换新的主驾调节开关，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 seat controller更换座椅控制器

1. Replace the seat controller with a new one and check whether the fault code and symptoms are eliminated.更换新的座椅控制器，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： ♦  Any repairs on the passenger seat with a seat controller (replacement of the entire seat and software flash of the seat controller are included), after the repair, it is necessary to use a diagnostic tool to clear the position information of the seat controller (when the diagnostic tool is operated, the vehicle remains in the Ready state), and inform the user that the position information has been cleared and the seat position needs to be re-memorized. Otherwise, the position information will be incorrect due to maintenance, resulting in the failure of related functions of the passenger seat.所有带座椅控制器的副驾驶座椅的任何维修（座椅整椅的更换、座椅控制器的软件刷新都包含在内），在维修后，都需要使用诊断仪对座椅控制器进行位置信息清除操作（诊断仪操作时，整车保持为Ready状态），并告知用户位置信息已清除，需要重新记忆座椅位置，否则会因为维修导致位置信息错误，导致副驾驶座椅相关功能失效。