Car smart multimedia unresponsive车载智能多媒体无反应

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 fuses IF02/IF26/IF54 in the electrical box on the instrument panel are normal.检查仪表板电器盒中保险丝IF02/IF26/IF54是否正常。 IF02：7.5A IF26：7.5A IF54：30A 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 vehicle infotainment head unit power wiring harness检查车载智能多媒体主机电源线束
	1. Power status "OFF".电源状态“OFF”。 2. Disconnect the vehicle infotainment head unit wiring harness connector IP47.断开车载智能多媒体主机线束接插件IP47。 3. Use a digital multimeter to measure the voltage between pin 11 of the IP47 and ground.用数字万用表测量IP47的11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 vehicle intelligent multimedia host power harness.否>>维修或更换车载智能多媒体主机电源线束。
③Check the ACC and IG1 power harness of the infotainment head unit检查车载智能多媒体主机的ACC、IG1电源线束
	1. Power status "OFF".电源状态“OFF”。 2. Disconnect the vehicle infotainment head unit wiring harness connector IP48.断开车载智能多媒体主机线束接插件IP48。 3. Power status "ON".电源状态“ON”。 4. Use a digital multimeter to measure the voltage between pin 14/10 of the IP48 and ground.用数字万用表测量IP48的14/10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 → Go to step 4.是>>去步骤4。 No → Repair or replace the ACC and IG1 power harness of the vehicle-mounted intelligent multimedia host.否>>维修或更换车载智能多媒体主机的ACC、IG1电源线束。
④Check the vehicle infotainment head unit grounding harness检查车载智能多媒体主机接地线束
	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 vehicle infotainment head unit wiring harness connector IP47.断开车载智能多媒体主机线束接插件IP47。 3. Use a digital multimeter to measure the resistance between pin 12 of the IP47 and ground.用数字万用表测量IP47的12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 5.是>>去步骤5。 No → Repair or replace the vehicle intelligent multimedia host grounding harness.否>>维修或更换车载智能多媒体主机接地线束。
⑤Replace 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。