Under normal circumstances, if the vehicle is located in a signal shielding area above an underground parking lot, factory building, or other areas that are covered by concrete or metal objects, it is highly likely that the positioning will be invalid. This situation is normal because the equipment can locate the previous position that fell into the shielding area, and the position is accurate. Once the vehicle drives out of the shielding area, it can be positioned normally

　　Another situation is that the vehicle does not match the position displayed in the monitoring system, that is, the positioning terminal cannot work properly. In this case, the locator manufacturer needs to check whether the locator is normal, and whether there are GPS signal shields on or around the vehicle body

　　In addition to ineffective positioning, another common malfunction of GPS terminals is offline

　　Offline is usually caused by communication failures, please follow the following process to troubleshoot

　　Firstly, check whether the power supply to the vehicle equipment is normal, whether the vehicle battery switch is turned off, and ensure that the equipment power indicator light is on. If it is not, please repair the power supply circuit

　　If the power supply to the device is normal, please contact the terminal provider to check if the traffic card inside the device is in arrears. If there is any arrears, please contact the operator to pay the fee

　　If the cost is normal, please contact the manufacturer's technical personnel to troubleshoot and repair the equipment

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