故障现象一辆2010年产路虎揽胜车,行驶里程约为8万km,因仪表上出现前照灯报警提示而进厂检修。故障诊断接车后,试车验证故障,故障现象确实存在。连接SDD调取故障代码,读得的故障代码为“左右前照灯执行故障”。尝试打开所有灯光,均正常点亮,但前照灯的自检功能不起作用,此外左右转向时的灯光补偿功能也不起作用。根据上述检查结果,推断故障原因可能是前照灯、前照灯控制(AFS)模块及相关线路存在故障。于是,首先对照电路图(图1)对线 Fault phenomenon A 2010 Land Rover Range Rover, mileage is about 80,000 km, due to the warning lights appear on the instrument into the factory overhaul. Troubleshooting After receiving the car, test to verify the fault, the fault does exist. Connection SDD recall fault code, read the fault code is “about the implementation of the fault headlamps ”. Try to turn on all the lights, are normal light, but the self-test feature of the headlamp does not work, in addition to the left and right steering light compensation function does not work. Based on the above examination results, it is concluded that the cause of the malfunction may be that the headlamp, headlamp control (AFS) module and related wiring are faulty. Therefore, the first control circuit (Figure 1) on the line