B009812 - TroubleshootingB009812-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
B009812	The positive terminal of the driver's side door pressure sensor is connected to the power supply驾驶员侧门压力传感器正极接电源	1. The positive terminal of the driver's side door pressure sensor is connected to the power supply.1.驾驶员侧门压力传感器正极接电源

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 the left front door pressure sensor wiring harness for damage, breakage, etc.检查左前门压力传感器线束是否存在损坏、断裂等现象。 3. Check the left front door pressure sensor harness connector for loose connection or damage.检查左前门压力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。

②Check left front door pressure sensor circuit检查左前门压力传感器线路

1. Check whether the positive terminal of the left front door pressure sensor is short-circuited to the power supply.检查左前门压力传感器正极是否与电源短路。 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 left front door pressure sensor wiring harness.维修或更换左前门压力传感器线束。

③Replace left front door pressure sensor更换左前门压力传感器

1. Replace the left front door pressure sensor with a new one and check whether the fault code and symptoms are eliminated.更换新的左前门压力传感器，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 4.去步骤4。

④Replace airbag electronic control unit更换安全气囊电控单元

1. Replace the airbag electronic control unit with a new one and check whether the fault code and symptoms are eliminated.更换新的安全气囊电控单元，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 airbag electronic control unit, you need to use a diagnostic tool to recalibrate the airbag electronic control unit.更换安全气囊电控单元后，需用诊断仪对安全气囊电控单元重新标定。