B11B419 - TroubleshootingB11B419-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
B11B419	The brake light output current is higher than the threshold (high-side drive)刹车灯输出电流高于阈值(高边驱动)	1. Pin connection problem1.管脚连接问题
		2. There is a problem with the lamp2.灯具出问题

Troubleshooting steps故障诊断步骤

①General inspection一般检查

1. Power status "OFF".电源状态“OFF”。 2. Check the brake light wiring harness for damage, breakage, etc.检查制动灯线束是否存在损坏、断裂等现象。 3. Check the brake light harness connector for damage, loose connection, etc.检查制动灯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 brake light output circuit检查制动灯输出线路

1. Check whether the brake light output circuit is normal.检查制动灯输出线路是否正常。 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 brake light output wiring harness.维修或更换制动灯输出线束。

③Replace brake light更换制动灯

1. Replace the brake light with a new one and check whether the fault code and symptoms are eliminated.更换新的制动灯，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。

④Replacing the integrated body control module更换集成式车身控制模块

1. Replace with a new integrated body control module and check whether the fault code and symptoms are eliminated.更换新的集成式车身控制模块，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 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。