What Causes the Tire Pressure Not to Display?

[Grayson]

When the tire pressure monitoring system fails to display readings, the first step is to identify which monitoring method it uses. This issue commonly occurs when the module of an internal tire pressure monitoring system malfunctions, and replacing the tire pressure monitor usually resolves it. There are three commonly used tire pressure monitoring methods: Direct Tire Pressure Monitoring: Direct tire pressure monitoring devices use pressure sensors installed in each tire to directly measure tire pressure. Wireless transmitters send pressure data from inside the tires to a central receiver module, which then displays the pressure readings for each tire. The system automatically alerts when tire pressure is too low or if there's a leak. Indirect Tire Pressure Monitoring: When a tire's pressure decreases, the vehicle's weight causes that tire's rolling radius to reduce, making it rotate faster than the other wheels. By comparing rotational speed differences between tires, the system monitors tire pressure. Indirect tire pressure alert systems essentially rely on calculating tire rolling radius to monitor pressure. Introduction to Tire Pressure Monitoring System (TPMS): This system combines the advantages of both above-mentioned systems. It equips direct sensors in two diagonally opposite tires while incorporating a 4-wheel indirect system. Compared to using only direct systems, this hybrid approach reduces costs and overcomes the indirect system's inability to detect simultaneous underinflation in multiple tires. However, it still cannot provide real-time pressure data for all four tires like direct systems can.