DESCRIPTIONThe TPMS Tyre Pressure Monitoring System checks the pressure and temperature of the tyres at all times sending the necessary information via the CAN. In particular, it activates signalling in the instrument panel if the inflation pressure is too low in one or more of the tyres or if there is a puncture.The system comprises a control unit inside the passenger compartment (in the luggage compartment, right hand side) and four transmission sensors located inside the tyre on the wheel rim which send signals to four receiver aerials. The aerials acquire information on the status of the four tyres via radio signals. They then communicate with the tyre pressure control unit, which communicates with the Body Computer via the CAN. At key-on, the control unit conducts an initial check: when the vehicle moves, the sensors measure the pressure and then make a transmission to indicate the initial status.The receiver receives this transmission from all the sensors within 5 seconds so that it can check tyre function. Two intervention thresholds are identified that are stored inside the receiver. The first (defined as CHECK) indicates that one or more tyres are at a pressure slightly lower than optimum pressure and the user should therefore check and restore the correct value.The second threshold (defined as WARNING) is set to indicate a constant or sudden pressure loss due to a puncture in one or more tyres. For more details: See descriptions 4450 HUBS AND WHEELS The control unit supply lines are protected by dedicated fuses in the Body Computer. |