B32031F - TroubleshootingB32031F-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
B32031F	Microphone signal input failure麦克风信号输入故障	1. Abnormal microphone bias voltage1.麦克风偏置电压异常

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 front dome light wiring harness is damaged or broken.检查前排顶灯线束是否存在损坏、断裂等现象。 3. Check the front dome light wiring harness connector for loose connection or damage.检查前排顶灯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 the microphone signal input line检查麦克风信号输入线路
	1. Power status "ON".电源状态“ON”。 2. Use a digital multimeter to measure the voltage between pins 4 and 5 of the front dome light harness connector BD47.用数字万用表测量前排顶灯线束接插件BD47的4号针脚与5号针脚之间的电压。 Standard voltage value: about 5V标准电压值：约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 Repair or replace the microphone signal input harness.维修或更换麦克风信号输入线束。
③Replace front dome light更换前排顶灯
1. Replace the front dome light with a new one and check whether the fault code and symptoms are eliminated.更换新的前排顶灯，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。
④Replace 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。