As we all know, tire pressure has a significant impact on the safety of the entire car. TPMS is installed on the car to reduce the occurrence of traffic accidents. Here, we will explain the indirect TPMS and direct TPMS of automobiles.
Simply put, direct TPMS uses direct tire pressure sensors on each wheel to measure tire pressure, while indirect TPMS uses no sensors. Indirect TPMS often use anti-lock brake system (ABS) speed sensors to calculate pressure.
The difference in the tire pressure information collection methods between indirect TPMS and direct TPMS naturally affects the tire pressure numerical results obtained.
Direct TPMS collects accurate pressure data directly from the tire valve through four specialized pressure sensors connected to the valve and transmits the data to the vehicle's electronic control unit (ECU), reporting pressure readings in real time.
Indirect TPMS uses the ABS system to estimate tire pressure, and the motorist must travel a considerable distance before an alert is issued.
Related More: The most complete information about Autel TPMS tool
Direct TPMS can accurately monitor the tire pressure of each tire and provide more accurate tire pressure data. The system will sound an alarm when the tire pressure falls below a preset value.
Direct TPMS can measure tire pressure in real time by reading sensors mounted directly inside the tire and transmit the data to the vehicle's electronic control unit (ECU).
Indirect TPMS is susceptible to interference from other factors. When the tire pressure of one or more tires is reduced, its radius decreases, causing the wheel rotation speed to increase. The system determines whether the tire pressure is below the normal range by comparing it with the vehicle's speed and other sensor data. Indirect TPMS cannot provide accurate tire pressure values and can only provide warning indications.
Therefore, choosing direct TPMS is more accurate and efficient.
Autel TPMS service tools can be divided into handheld and tablet OBD2 scanners. You can also buy Autel sensors in the Obdprice store. Autel MX-Sensors are programmed to replace 98% of the sensors in today’s vehicles.
Autel TPMS MX-Sensor 315MHz & 433MHz 2in1 Tire Pressure Sensors Summer Tire Universal Clamp In
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Autel MaxiTPMS TS501 TPMS Relearn Tool with TPMS Diagnostics, Sensor Activate and Sensor Programming, Upgraded Version of TS401/TS408
Autel MaxiTPMS ITS600 TPMS Relearn Tool, TPMS Programming Tool Activate/Relearn All Sensors, TPMS Diagnostics, 4 Reset Functions (Oil Reset, BMS, SAS, EPB), Auto VIN (Free Update)
Autel MaxiCheck MX808S-TS Car Scanner, 2023 Bi-directional Tool with 30+ Service, Updated of MX808TS/MX808S/MK808TS, and 2 Free Autel TPMS MX-Sensor
View Autel TPMS Tool: https://www.obdprice.com/collections/tpms-tools
