车型:别克ENCORE G。VIN:LSGJB84J8EY××××××。行驶里程:27126km。故障现象:客户反映换挡背景灯不亮。故障诊断:首先验证了客户所说故障现象(如图1所示),确认故障存在。常规检查未发现异常,使用专用诊断仪GDS诊断,检查结果有故障码显示,如图3所示。查阅局域互联网(LIN)总线电路说明:局域互联网(LIN)总线由 Model: Buick ENCORE G. VIN: LSGJB84J8EY ××××××. Mileage: 27126km. Symptom: The customer reflects the shift background light is not bright. Fault diagnosis: First verify the customer said symptoms (Figure 1), to confirm the existence of the fault. Routine tests found no abnormalities, the use of special diagnostic GDS diagnosis, test results have fault code display, as shown in Figure 3. Check the local area network (LIN) bus circuit description: Local Area Network (LIN) bus by