How to Troubleshoot Indirect Tire Pressure Monitoring System Faults?
2 Answers
Here are the solutions for indirect tire pressure monitoring system faults: 1. Direct TPMS: The direct tire pressure monitoring system uses pressure sensors installed in each tire to directly measure tire pressure, then transmits pressure data from inside the tire to a central receiver module via wireless transmitters for pressure display. The system automatically alerts when tire pressure is too low or when there's air leakage. 2. Indirect TPMS: The working principle of indirect tire pressure monitoring is that when a tire's pressure decreases, the vehicle's weight causes that wheel's rolling radius to shrink, making it rotate faster than other wheels. By comparing rotational speed differences between tires, it achieves tire pressure monitoring. The indirect tire alert system essentially monitors pressure by calculating tire rolling radius.
Last time my tire pressure warning light came on, I fixed it myself. Indirect monitoring relies on wheel speed sensors to calculate speed differences and determine tire pressure, which can lead to more false alarms. First, adjust all four tires to the standard pressure when they're cold, then press and hold the tire pressure reset button on the dashboard for 5 seconds. The car should be running but not moving—wait for the warning light to go off before releasing. Drive about 10 kilometers to let the system relearn. If the light stays on, there might be an issue with the sensor—my neighbor once had a deformed sensor bracket causing signal loss. Always keep an eye on tire wear and remember to reset the system after changing tires.
