P144191 - TroubleshootingP144191-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
P144191	Collision hard line PWM is not within the reasonable range碰撞硬线PWM不在合理范围	1. Collision hard wire failure, wiring harness failure or interface failure1.碰撞硬线故障、线束故障或接口故障

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 whether the vehicle controller wiring harness is damaged or broken.检查整车控制器线束是否存在损坏、断裂等现象。 3. Check whether the vehicle controller wiring harness connector is corroded or damaged.检查整车控制器线束接插件是否存在腐蚀、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 the vehicle controller wiring harness or connector.维修或更换整车控制器线束或接插件。
②Check airbag system检查安全气囊系统
1. Power status "OFF".电源状态“OFF”。 2. Connect the diagnostic tool.连接诊断仪。 3. Power status "ON".电源状态“ON”。 4. Use a diagnostic tool to check whether the airbag system is normal.用诊断仪检查安全气囊系统是否正常。 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 Overhaul the airbag system.检修安全气囊系统。
③Check the collision signal harness检查碰撞信号线束
	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 vehicle controller harness connector FB41 and the airbag electronic control unit harness connector BD51.断开整车控制器线束接插件FB41和安全气囊电控单元线束接插件BD51。 3. Use a digital multimeter to measure the resistance between pin 19 of FB41 and pin 2 of BD51.用数字万用表测量FB41的19号针脚与BD51的2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是 Go to step 4.去步骤4。 No否 Repair or replace the collision signal wiring.维修或更换碰撞信号线路。
④Replace vehicle controller更换整车控制器
1. Replace the vehicle controller with a new one and check whether the fault code and symptoms are eliminated.更换新的整车控制器，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： ♦  After replacing the vehicle controller, you need to use a diagnostic tool to recalibrate the vehicle controller.更换整车控制器后，需用诊断仪对整车控制器重新标定。