B11001C - TroubleshootingB11001C-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
B11001C	Main power supply exceeds limit主电源超限	1. The 12V power supply voltage of the vehicle is abnormal1.整车的12V供电电压异常
		2.T-BOX failure2.T-BOX故障

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。
②Check 12V battery voltage检查蓄电池电压
1. Power status is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”,断开蓄电池负极。 2. Use a digital multimeter to measure the voltage between the positive and negative terminals of the 12V battery.用数字万用表测量蓄电池正负极之间的电压。 Standard voltage value: about 12.5V标准电压值：约12.5V 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 Inspect the 12V battery and replace it if necessary.检修蓄电池，必要时更换蓄电池。
③Check DCDC output voltage检查DCDC输出电压
1. The vehicle is powered on.车辆上电。 2. Use a digital multimeter to measure the voltage between the positive and negative terminals of the 12V battery.用数字万用表测量蓄电池正负极之间的电压。 Standard voltage value: about 14V标准电压值：约14V 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 Inspect DCDC and its lines.检修DCDC及其线路。
④Check T-BOX power supply voltage检查T-BOX供电电压
	1. The vehicle is powered on.车辆上电。 2. Use a digital multimeter to measure the voltage between pins 16/31 of the T-BOX harness connector IP63 and ground.用数字万用表测量T-BOX线束接插件IP63的16/31号针脚与接地之间的电压。 Standard voltage value: about 14V标准电压值：约14V Are the test results normal?检查结果是否正常？ Yes是 Go to step 5.去步骤5。 No否 Repair or replace the T-BOX power supply wiring harness.维修或更换T-BOX供电线束。
⑤Replace T-BOX更换T-BOX
1. Replace with a new T-BOX and check whether the fault code and symptoms are eliminated.更换新的T-BOX，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 T-BOX, you need to use a diagnostic instrument to recalibrate the T-BOX.更换T-BOX后，需用诊断仪对T-BOX重新标定。