What does a faulty indirect tire pressure monitoring system mean?
1 Answers
Indirect tire pressure monitoring uses wheel speed sensors to compare the rotational speeds of tires to determine if there is abnormal tire pressure. Reasons for the tire pressure monitoring light to illuminate: The tire pressure monitoring light may come on due to a punctured tire; sometimes it indicates excessively high tire pressure; prolonged driving with low tire pressure can also trigger the light. Function of indirect tire pressure monitoring devices: Indirect tire pressure monitoring devices actually utilize the speed sensors in a car's ABS braking system to compare the rotation counts of the four tires. If one tire has lower pressure, its rotation count will differ from the others. By using the same sensors and signals as the ABS system and making software adjustments in the vehicle's computer, a new function can be established in the driving computer to warn the driver when one tire's pressure is lower compared to the other three.