The TPMS module is located above the roof lining of the vehicle. It is mounted directly on the central cross member of the roof behind the sunroof. The module is fastened with two screws that are screwed into the weld nuts of the cross member. The three module connectors are directed towards the front of the vehicle.
The main purpose of the TPMS module is to detect the following conditions:
- Tire pressure drop below minimum recommended - underinflated tire
- Tire pressure drop below the minimum recommended - Significantly under-inflated tire
- The position of the tire on the vehicle.
The TPMS module also communicates with the instrument panel, providing the driver with appropriate warnings that reflect the importance of the conditions detected, as well as information about the status and malfunctions of the TPMS components and parts.
Tire arrangement
Since the set and limit pressures are different for the front and rear tires, the TPMS module can determine the position of the tires on the vehicle and assign the identification information from the pressure sensors to the corresponding tire positions on the vehicle, such as FL (left front tire), FR (right rear tire), RL (left rear tire) and RR (right rear tire)).
The module detects tire positions automatically. This feature does not require driver intervention. The TPMS module can automatically determine the position of the tires on the vehicle in the event of a change in the location of the tire pressure sensors or the tires themselves.
In all operating conditions, the TPMS module is able to detect the following conditions:
- Replacing one or more tire pressure sensors
- Missing one or more tire pressure sensors
- received one or more "strangers" identification signals, i.e. the module can discard identification data from tire pressure sensors that do not belong to this vehicle.
- Replacing one of the car's wheels with a spare wheel, and vice versa.
When the tire pressure sensors are replaced, the module can automatically detect the identification information of the new sensors. This setting feature does not require manual intervention by the driver.
Spare wheel identification
The spare tire may or may not have a pressure sensor, depending on the vehicle's equipment.
If the spare wheel has a tire pressure sensor, the TPMS module recognizes it and determines that it is a spare tire. It then monitors the tire pressure of that wheel and warns the driver if necessary. If the TPMS module expects the spare tire to have a tire pressure sensor and there is no pressure sensor, the module does not report a fault to the driver, however, a fault code is stored in the TPMS module.
If the spare tire pressure is monitored and the driver replaces the flat "working" spare tire, the module will not constantly remind the driver that there is a flat tire in the place of the spare tire. This prevents the driver from being constantly distracted by tire pressure warnings.
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