Equipment for an electronic system for checking the pressure of the tyres of a motor vehicle

An apparatus for an electronic system for selectively measuring air pressure of a tire of a motor vehicle, said apparatus comprising:

• a tire pressure monitoring system (TPMS) tool positioned external to the tire and the motor vehicle comprising:
• an activation module configured to selectively activate a pressure sensor housed in a first tire;
• a reception means for receiving signals from the pressure sensor;
• an electronic entity configured to at least one of store or process data carried by the signals received from the pressure sensor;
• and
• a communication means configured to communicate with an onboard computer of the motor vehicle so as to transmit the data from the received signals;
• an internal pressure sensor external to the tire and the motor vehicle, the internal pressure sensor in communication with the TPMS tool;
• and
• a connector configured to selectively connect the apparatus to a tire valve of the tire of the motor vehicle to place the internal pressure sensor in communication with an air pressure of the tire of the motor vehicle, wherein the internal pressure sensor is configured to alternately measure an air pressure of a second tire not including the pressure sensor and measure an air pressure of the first tire including the pressure sensor to check that the pressure sensor in the first tire is operating correctly, and communicate the measured air pressure to the TPMS tool.