The touch control screen does not display触摸控制屏不显示

①Check fuse检查保险丝
	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 fuse IF34 in the electrical box on the instrument panel is normal.检查仪表板电器盒中保险丝IF34是否正常。 IF34：10A Are the test results normal?检查结果是否正常？ Yes → Go to step 2.是>>去步骤2。 No → Replace the fuse with the same specification.否>>更换相同规格的保险丝。
②Check the touch control screen power harness检查触摸控制屏电源线束
	1. Power status "OFF".电源状态“OFF”。 2. Disconnect the touch control panel wiring harness connector IP42.断开触摸控制屏线束接插件IP42。 3. Use a digital multimeter to measure the voltage between pin 1 of the IP42 and ground.用数字万用表测量IP42的1号针脚与接地之间的电压。 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 → Go to step 3.是>>去步骤3。 No → Repair or replace the touch control screen power harness.否>>维修或更换触摸控制屏电源线束。
③Check the touch control screen grounding harness检查触摸控制屏接地线束
	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 touch control panel wiring harness connector IP42.断开触摸控制屏线束接插件IP42。 3. Use a digital multimeter to measure the resistance between pin 4 of the IP42 and ground.用数字万用表测量IP42的4号针脚与接地之间的电阻。 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 → Go to step 4.是>>去步骤4。 No → Repair or replace the touch control screen grounding harness.否>>维修或更换触摸控制屏接地线束。
④Check the touch control screen ACC signal harness检查触摸控制屏ACC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 touch control screen harness connector IP42 and the vehicle infotainment head unit harness connector IP48.断开触摸控制屏线束接插件IP42与车载智能多媒体主机线束接插件IP48。 3. Use a digital multimeter to measure the resistance between IP42 pin 5 and IP48 pin 18.用数字万用表测量IP42的5号针脚与IP48的18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 → Go to step 5.是>>去步骤5。 No → Repair or replace the touch control screen ACC signal harness.否>>维修或更换触摸控制屏ACC信号线束。
⑤Check the touch control screen signal harness检查触摸控制屏信号线束
	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 touch control screen harness connector IP43 and the vehicle infotainment head unit harness connector IP51.断开触摸控制屏线束接插件IP43与车载智能多媒体主机线束接插件IP51。 3. Use a digital multimeter to measure the resistance between pin 1/2 of IP43 and pin 4/8 of IP51.用数字万用表测量IP43的1/2号针脚与IP51的4/8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 → Go to step 6.是>>去步骤6。 No → Repair or replace the touch control screen signal harness.否>>维修或更换触摸控制屏信号线束。
⑥Replace touch control screen更换触摸控制屏
1. Replace the touch control screen and check whether the fault is eliminated.更换触摸控制屏，检查故障是否排除。 Are the test results normal?检查结果是否正常？ Yes → Fault resolved.是>>故障排除。 No → Go to step 7.否>>去步骤7。
⑦Replace the vehicle infotainment head unit assembly更换车载智能多媒体主机总成
1. Replace the infotainment head unit assembly and check whether the fault is eliminated.更换车载智能多媒体主机总成，检查故障是否排除。 Are the test results normal?检查结果是否正常？ Yes → Fault resolved.是>>故障排除。 No → Find the cause from other fault symptoms.否>>从其他故障现象查找原因。   Caution:注意： ♦  After replacing the infotainment head unit assembly, you need to use a diagnostic instrument to recalibrate the infotainment head unit assembly.更换车载智能多媒体主机总成后，需用诊断仪对车载智能多媒体主机总成重新标定。