P144462 - TroubleshootingP144462-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
P144462	The two accelerator pedal position sensor signals do not match两个油门踏板位置传感器信号不匹配	1. The accelerator pedal status reflected by the accelerator pedal position sensor 1 signal and the accelerator pedal position sensor 2 signal is inconsistent1.油门踏板位置传感器1信号与油门踏板位置传感器2信号所反映的油门踏板状态不一致

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 accelerator pedal assembly wiring harness for damage, breakage, etc.检查加速踏板总成线束是否存在损坏、断裂等现象。 3. Check the accelerator pedal assembly wiring harness connector for corrosion, damage, etc.检查加速踏板总成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 accelerator pedal assembly harness or connector.维修或更换加速踏板总成线束或接插件。
②Check the accelerator pedal assembly signal harness检查加速踏板总成信号线束
	1. Power status "ON".电源状态“ON”。 2. Slowly depress the accelerator pedal and use a digital multimeter to measure whether the voltage change between pin 1/4 of the accelerator pedal assembly harness connector FB53 and ground is normal.缓慢踩下加速踏板，用数字万用表分别测量加速踏板总成线束接插件FB53的1/4号针脚与接地之间的电压变化是否正常。 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 accelerator pedal assembly signal harness; if the fault persists, go to step 3.维修或更换加速踏板总成信号线束；若故障依然存在，去步骤3。
③Replace the accelerator pedal assembly更换加速踏板总成
1. Replace the accelerator pedal assembly with a new one and check whether the fault code and symptoms are eliminated.更换新的加速踏板总成，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 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。